CN118306361B - A hydraulically decoupled electronic hydraulic brake system - Google Patents
A hydraulically decoupled electronic hydraulic brake system Download PDFInfo
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- CN118306361B CN118306361B CN202410732959.8A CN202410732959A CN118306361B CN 118306361 B CN118306361 B CN 118306361B CN 202410732959 A CN202410732959 A CN 202410732959A CN 118306361 B CN118306361 B CN 118306361B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
本发明涉及汽车制动系统技术领域，具体涉及一种液压解耦式电子液压制动系统，包括与油壶模块和轮端模块连接的主制动回路、冗余制动回路和机械制动回路；主制动回路包括与油壶模块和轮端模块连接的第一建压模块；机械制动回路包括与油壶模块和轮端模块连接的机械建压模块；于第一建压模块和机械建压模块中的至少部分失效或产生的液压力不足时，通过冗余制动回路的配合能够满足车辆的制动需求。第一建压模块和机械建压模块中的至少部分失效时，冗余制动回路能够产生液压力，以满足车辆的制动需求。主制动回路、冗余制动回路和机械制动回路中的至少两个可以相互配合来解决轮端模块所需的液压力较高的问题，能够满足车辆的制动需求。
The present invention relates to the technical field of automobile braking systems, and specifically to a hydraulically decoupled electronic hydraulic braking system, comprising a main braking circuit, a redundant braking circuit and a mechanical braking circuit connected to an oil pot module and a wheel end module; the main braking circuit comprises a first pressure building module connected to the oil pot module and the wheel end module; the mechanical braking circuit comprises a mechanical pressure building module connected to the oil pot module and the wheel end module; when at least part of the first pressure building module and the mechanical pressure building module fails or the hydraulic pressure generated is insufficient, the braking demand of the vehicle can be met through the cooperation of the redundant braking circuit. When at least part of the first pressure building module and the mechanical pressure building module fails, the redundant braking circuit can generate hydraulic pressure to meet the braking demand of the vehicle. At least two of the main braking circuit, the redundant braking circuit and the mechanical braking circuit can cooperate with each other to solve the problem of high hydraulic pressure required by the wheel end module, and can meet the braking demand of the vehicle.
Description
Technical Field
The invention relates to the technical field of automobile brake systems, in particular to a hydraulic decoupling type electronic hydraulic brake system.
Background
With the gradual improvement of the performance level and the maturity of the intelligent driving system, in order to meet the requirement of the L3 level on redundant braking, namely, the vehicle must have the brake-by-wire backup capability, the conventional braking system can only realize the mechanical brake backup capability and cannot meet the high-level automatic driving requirement. The existing redundancy scheme is an IPB+RBU scheme, namely, on the basis of the existing onebox, an RBU (equivalent to a pressure building unit) is newly added for backup pressure building, the cost is high, the redundancy capacity is improved only limitedly, the redundancy is realized by adding the pressure building unit, and the redundancy scheme is difficult to be accepted by the mainstream market.
Disclosure of Invention
The present invention provides a hydraulic decoupled electro-hydraulic brake system that addresses the above-identified problems with the prior art.
In order to solve the technical problems, the invention is solved by the following technical scheme:
A hydraulic decoupling type electronic hydraulic braking system comprises a main braking loop, a redundant braking loop and a mechanical braking loop which are respectively connected with an oilcan module and a wheel end module;
the main braking loop comprises a first pressure building module connected with the oilcan module and the wheel end module; the mechanical braking loop comprises a mechanical pressure building module connected with the oilcan module and the wheel end module;
the oilcan module at least comprises a first oil storage cavity, a second oil storage cavity and a third oil storage cavity; the main brake loop is connected with the first oil storage cavity;
The redundant braking loop comprises a second pressure building module, and the second pressure building module is connected with the second oil storage cavity and the third oil storage cavity;
The redundant braking loop and the mechanical braking loop are respectively connected with the second oil storage cavity and the third oil storage cavity;
the first pressure building module comprises a pressure building cavity, a first electromagnetic valve and a second electromagnetic valve; the wheel end module comprises a first wheel set and a second wheel set, and the first wheel set and the second wheel set comprise at least one wheel;
The pressure build-up cavity is connected with the first wheel set through the first electromagnetic valve and connected with the second wheel set through the second electromagnetic valve;
The redundant brake circuit further comprises a first line and a second line;
one end of the first circuit is connected with the second oil storage cavity, and the other end of the first circuit is connected between the first electromagnetic valve and the first wheel set; one end of the second circuit is connected with the third oil storage cavity, and the other end of the second circuit is connected between the second electromagnetic valve and the second wheel set;
One end of the second pressure building module is connected between the first electromagnetic valve and the first wheel set, and the other end of the second pressure building module is connected between the second electromagnetic valve and the second wheel set.
Preferably, the pedal sensing device further comprises a pedal sensing module, wherein one end of the pedal sensing module is connected with the second oil storage cavity and/or the third oil storage cavity, and the other end of the pedal sensing module is connected between the first pressure building module and the first oil storage cavity.
Preferably, a first pressure sensor is arranged between the first circuit and the second building module; and a second pressure sensor is arranged between the second circuit and the second building module.
Preferably, the pedal sensing module comprises a simulation cavity, and a sealing ring is arranged at the simulation cavity.
Preferably, the mechanical brake circuit comprises a first brake cylinder connected to the second reservoir and a second brake cylinder connected to the third reservoir; the first brake cylinder is further connected between the first electromagnetic valve and the first wheel set through a third electromagnetic valve, and the second brake cylinder is further connected between the second electromagnetic valve and the second wheel set through a fourth electromagnetic valve.
The invention has at least the following beneficial effects:
1. In the running process of the vehicle, when the vehicle generates a braking request, the main braking loop, the redundant braking loop and the mechanical braking loop can generate hydraulic pressure through oil liquid provided by the oil pot module and transmit the hydraulic pressure to the wheel end module, namely, the main braking loop, the redundant braking loop and the mechanical braking loop can independently meet the braking requirement of the vehicle; therefore, when at least part of the first pressure building module and the mechanical pressure building module fail, the redundant brake loop can still keep complete functions, so that the redundant brake loop can generate hydraulic pressure by utilizing oil provided by the oil pot module and transmit the hydraulic pressure to the wheel end module so as to meet the braking requirement of a vehicle.
2. When the hydraulic pressure generated by the main brake loop or the mechanical brake loop or the main brake loop plus the mechanical brake loop is insufficient, namely, the hydraulic pressure generated by the first pressure building module or the mechanical pressure building module or the first pressure building module plus the mechanical pressure building module is insufficient, the redundant brake loop can be started, and the hydraulic pressure is generated through the auxiliary synchronization of the redundant brake loop so as to generate enough hydraulic pressure and transmit the enough hydraulic pressure to the wheel end module to meet the braking requirement of a vehicle.
Drawings
FIG. 1 illustrates a schematic diagram of a hydraulically decoupled electro-hydraulic brake system in some embodiments of the present application;
FIG. 2 is a schematic diagram of a hydraulic decoupling electro-hydraulic brake system with a first pressure sensor disposed between a first circuit and a second pressure building module, and a second pressure sensor disposed between the second circuit and the second pressure building module according to some embodiments of the present application;
FIG. 3 is a schematic diagram of a hydraulic decoupled electro-hydraulic brake system in which third, fourth, eighth, and ninth solenoid valves remain closed while the vehicle employs a main brake circuit, and first, second, and fifth solenoid valves remain conductive, in some embodiments of the present application;
FIG. 4 is a schematic diagram of a hydraulic decoupled electro-hydraulic brake system in which a first solenoid valve, a second solenoid valve, a fifth solenoid valve, an eighth solenoid valve, and a ninth solenoid valve are all kept closed while a vehicle employs a mechanical brake circuit, and a third solenoid valve and a fourth solenoid valve are kept on in some embodiments of the present application;
fig. 5 is a schematic diagram of a hydraulic decoupled electro-hydraulic brake system in which the first, second, third, fourth, sixth, and seventh solenoid valves are all kept closed while the fifth, eighth, and ninth solenoid valves are kept on when the vehicle employs a redundant brake circuit in some embodiments of the present application.
The names of the parts indicated by the numerical references in the drawings are as follows:
10. A first pipeline; 11. a first line; 12. a first one-way valve; 20. a second pipeline; 21. a second line; 22. a second one-way valve; 30. a third pipeline; 40. a fourth pipeline; 50. a foot pedal; 110. a first oil storage chamber; 120. a second oil storage chamber; 130. a third oil storage chamber; 210. a wheel; 211. a pressure increasing valve; 212. a pressure reducing valve; 310. building a pressure cavity; 311. a first electromagnetic valve; 312. a second electromagnetic valve; 410. a redundant motor; 420. a pump body; 510. a first brake cylinder; 520. a second brake cylinder; 530. a third electromagnetic valve; 540. a fourth electromagnetic valve; 610. a simulation chamber; 620. a fifth electromagnetic valve; 710. a sixth electromagnetic valve; 720. a seventh electromagnetic valve; 730. an eighth electromagnetic valve; 740. a ninth electromagnetic valve; 810. a first pressure sensor; 820. a second pressure sensor; 910. and (3) a filter screen.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples. It is to be understood that the examples are illustrative of the present invention and are not intended to be limiting.
As shown in fig. 1, the present embodiment provides a hydraulic decoupling electronic hydraulic brake system, which can be applied to a vehicle to meet the braking requirement of the vehicle, and includes an oilcan module, a wheel end module, a main brake circuit, a redundant brake circuit and a mechanical brake circuit, wherein the main brake circuit, the redundant brake circuit and the mechanical brake circuit are respectively connected with the oilcan module and the wheel end module, the oilcan module can provide oil for the main brake circuit, the redundant brake circuit and the mechanical brake circuit, and when the vehicle generates a braking request, the main brake circuit, the redundant brake circuit and the mechanical brake circuit can generate hydraulic pressure by using the oil provided by the oilcan module and transmit the hydraulic pressure to the wheel end module, so as to realize the braking of the vehicle.
Further, the main braking loop comprises a first pressure building module which is respectively connected with the oilcan module and the wheel end module, and when a vehicle generates a braking request, the first pressure building module can generate hydraulic pressure by utilizing oil provided by the oilcan module and transmit the hydraulic pressure to the wheel end module so as to realize braking of the vehicle; the mechanical brake loop comprises a mechanical pressure building module which is respectively connected with the oilcan module and the wheel end module, and when a vehicle generates a brake request, the mechanical pressure building module can generate hydraulic pressure by utilizing oil liquid provided by the oilcan module and transmit the hydraulic pressure to the wheel end module so as to realize the braking of the vehicle.
It can be understood that, in the running process of the vehicle, when the vehicle generates a braking request, the main braking loop, the redundant braking loop and the mechanical braking loop can generate hydraulic pressure through the oil liquid provided by the oil pot module and transmit the hydraulic pressure to the wheel end module, namely, the main braking loop, the redundant braking loop and the mechanical braking loop can independently meet the braking requirement of the vehicle; therefore, when at least part of the first pressure building module and the mechanical pressure building module fail, the redundant brake loop can still keep complete functions, so that the redundant brake loop can generate hydraulic pressure by utilizing oil provided by the oil pot module and transmit the hydraulic pressure to the wheel end module so as to meet the braking requirement of a vehicle.
Wherein at least partial failure of the first pressure building module and the mechanical pressure building module can be understood as: at least a portion of the first pressure building module is disabled or at least a portion of the mechanical pressure building module is disabled or at least one of the first pressure building module and the mechanical pressure building module is disabled entirely.
Further, at least two of the main brake loop, the redundant brake loop and the mechanical brake loop can be matched with each other when the vehicle generates a brake request, the problem that the hydraulic pressure required by the wheel end module is high is solved through a synchronous pressure building mode, and the brake requirement of the vehicle can be met better.
It will be appreciated that when the hydraulic pressure generated by the primary or mechanical or plus brake circuits is insufficient, i.e. the hydraulic pressure generated by the first build-up or plus modules, the redundant brake circuit may be activated to generate hydraulic pressure by the auxiliary synchronization of the redundant brake circuit to generate and transmit sufficient hydraulic pressure to the wheel end modules to meet the braking demands of the vehicle. Of course, combining the above, cases where the hydraulic pressure generated by the main brake circuit or the mechanical brake circuit or the main brake circuit plus the mechanical brake circuit is insufficient include: the functions of the first pressure building module and the mechanical pressure building module are all normal, and at least part of the first pressure building module and the mechanical pressure building module is invalid.
In some embodiments, the carafe module includes at least three separate oil storage chambers, including but not limited to a first oil storage chamber 110, a second oil storage chamber 120, and a third oil storage chamber 130. Wherein, the first pressure building module of the main brake loop is connected with the first oil storage cavity 110; the redundant brake circuit is connected to at least one of the second reservoir 120 and the third reservoir 130; the mechanical pressure building module of the mechanical brake circuit is connected with at least one of the second reservoir 120 and the third reservoir 130.
It will be appreciated from the foregoing that the connection of the primary brake circuit to the oiler module is different from the redundant brake circuit and the mechanical brake circuit. Specifically, when the vehicle generates a brake request, the first pressure building module of the main brake circuit may generate hydraulic pressure by using the oil provided by the first oil storage chamber 110 and transmit the hydraulic pressure to the wheel end module, the redundant brake circuit may generate hydraulic pressure by using the oil provided by the second oil storage chamber 120 and/or the third oil storage chamber 130 connected thereto and transmit the hydraulic pressure to the wheel end module, and the mechanical pressure building module of the mechanical brake circuit may generate hydraulic pressure by using the oil provided by the second oil storage chamber 120 and the third oil storage chamber 130 connected thereto and transmit the hydraulic pressure to the wheel end module.
It should be noted that, in the running process of the vehicle, the first pressure building module in the main brake circuit has an oil leakage failure condition, and in this case, since the first pressure building module is only connected with the first oil storage cavity 110, the failure of the first pressure building module only causes the oil in the first oil storage cavity 110 to leak, and the second oil storage cavity 120 and the third oil storage cavity 130 are not affected, so that the second oil storage cavity 120 and the third oil storage cavity 130 still have sufficient oil.
From the above, it can be seen that when the first building module fails, the braking requirement of the vehicle can be met by the redundant braking circuit. When the first pressure building module fails and causes oil in the first oil storage cavity 110 to leak, the second oil storage cavity 120 and/or the third oil storage cavity 130 connected with the redundant brake circuit can provide sufficient oil for the redundant brake circuit, so that the redundant brake circuit can generate sufficient hydraulic pressure, and further, the braking requirement of the vehicle is met. Similarly, since the second oil storage chamber 120 and the third oil storage chamber 130 have sufficient oil, the braking requirement of the vehicle can be met through the mechanical braking circuit, and the description thereof is omitted. Further, when the second oil storage chamber 120 and/or the third oil storage chamber 130 generate oil leakage, the first oil storage chamber 110 is not affected, so that the first oil storage chamber 110 can have sufficient oil, and further, the braking requirement of the vehicle can be met through the main braking loop.
In some embodiments, the hydraulic decoupling electro-hydraulic brake system of the present application further includes a foot pedal 50 and a pedal feel module. Wherein, the pedal 50 is directly connected to the mechanical pressure building module, and a driver steps on the pedal 50 to realize that the mechanical pressure building module generates hydraulic pressure through oil provided by the oil pot module and provides the hydraulic pressure to the wheel end module; one end of the pedal sensing module is connected with at least one of the second oil storage chamber 120 and the third oil storage chamber 130, and the other end of the pedal sensing module is connected between the first pressure building module and the first oil storage chamber 110, and the pedal sensing module is mainly used when the vehicle brakes the vehicle by generating hydraulic pressure through the main braking module or the redundant braking module, and the pedal sensing module is used for providing force feedback for the driver when the driver steps on the pedal 50 so as to simulate foot feeling when the hydraulic pressure is generated through the mechanical pressure building module, and driving experience and comfort of the driver are improved.
Further, since the pedal feel module is not operated when the braking demand of the vehicle is achieved through the mechanical brake circuit, the pedal feel module includes the simulation chamber 610 and the fifth solenoid valve 620, the fifth solenoid valve 620 is disposed between the simulation chamber 610 and the oilcan module, when the mechanical brake circuit is operated, the fifth solenoid valve 620 is closed, and when the redundant brake circuit or the main brake circuit is operated, the fifth solenoid valve 620 is turned on.
It should be noted that, when the braking requirement of the vehicle is met through the main braking loop or the redundant braking loop, the driver steps on the pedal 50, and at this time, the second oil storage chamber 120 and/or the third oil storage chamber 130 connected with the pedal feel module provide oil for the pedal feel module, so that the pedal feel module can provide better foot feel for the driver by using the oil; when the hydraulic pressure generated by the pressure build-up of the first pressure build-up module is ended and pressure relief is carried out, the oil in the pedal feel module can enter between the first pressure build-up module and the first oil storage cavity 110 from the other end of the pedal feel module, and then the oil in the pedal feel module flows back into the first oil storage cavity 110.
Particularly, oil is also required for the operation of the pedal feel module, so that the pedal feel module can have the condition of oil leakage failure in the running process of the vehicle. At this time, closing the fifth solenoid valve 620, the pedal feel module may only cause leakage of the first reservoir chamber 110, while both the second and third reservoir chambers 120, 130 may have sufficient oil such that the vehicle may be able to meet the braking demand of the vehicle through redundant braking circuits and/or mechanical braking circuits when a braking request is made.
In some embodiments, the redundant brake circuit comprises a second pressure building module, the redundant brake circuit is connected with at least one of the second oil storage cavity 120 and the third oil storage cavity 130 through the second pressure building module, and when the redundant brake circuit works, the second pressure building module of the redundant brake circuit generates hydraulic pressure by using oil provided by the oil pot module and transmits the hydraulic pressure to the wheel end module.
The second oil storage chamber 120 and/or the third oil storage chamber 130 connected with the second pressure building module can provide sufficient oil for the second pressure building module to provide sufficient hydraulic pressure for the wheel end module when at least a portion of the first and mechanical pressure building modules fail or the hydraulic pressure generated is insufficient.
It should be noted that, since the first pressure building module is connected to the first oil storage chamber 110, the second pressure building module may be directly used to provide sufficient hydraulic pressure for the wheel end module when the first pressure building module is partially or completely disabled. When the mechanical brake loop and the redundant brake loop are connected with different oil storage cavities, the second pressure building module can be directly used for providing sufficient hydraulic pressure for the wheel end module, but when the mechanical brake loop and the redundant brake loop are connected with the same oil storage cavity, the mechanical brake loop needs to be closed so as to avoid leakage of oil, and therefore the second pressure building module can obtain sufficient oil to generate hydraulic pressure.
In some embodiments, the first pressure building module includes a pressure building chamber 310, a first solenoid valve 311, and a second solenoid valve 312; the wheel end module includes a first wheel set and a second wheel set, each including at least one wheel 210. The first pressure building module is connected with the first oil storage cavity 110 through a pressure building cavity 310, the pressure building cavity 310 is connected with the first wheel set through a first electromagnetic valve 311, and the pressure building cavity 310 is connected with the second wheel set through a second electromagnetic valve 312.
When the vehicle generates a braking request, the first electromagnetic valve 311 and the second electromagnetic valve 312 are both in a conducting state when the main braking loop works, the pressure build-up cavity 310 builds up pressure by extracting oil in the first oil storage cavity 110 to generate hydraulic pressure, and then the pressure build-up cavity 310 transmits the generated hydraulic pressure to the first wheel set and the second wheel set through the first electromagnetic valve 311 and the second electromagnetic valve 312 respectively, so that the braking requirement of the vehicle can be realized.
In some embodiments, the redundant brake circuit not only comprises the second pressure building module, but also comprises a first line 11 and a second line 21; one end of the first circuit 11 is connected with the second oil storage cavity 120, the other end of the first circuit 11 is connected between the first electromagnetic valve 311 and the first wheel set, one end of the second circuit 21 is connected with the third oil storage cavity 130, and the other end of the second circuit 21 is connected between the second electromagnetic valve 312 and the second wheel set; one end of the second pressure building module is connected between the first electromagnetic valve 311 and the first wheel set, and the other end of the second pressure building module is connected between the second electromagnetic valve 312 and the second wheel set.
When the vehicle generates a braking request and realizes vehicle braking through the redundant braking loop, the mechanical braking loop keeps a closed state, the first electromagnetic valve 311 and the second electromagnetic valve 312 are closed, so that the pressure build-up cavity 310 and the first wheel set and the second wheel set are in a closed state, at this time, the second pressure build-up module can extract oil in the second oil storage cavity 120 and the third oil storage cavity 130 through the first circuit 11 and the second circuit 21, and then the pressure build-up is realized to generate hydraulic pressure and is transmitted to the first wheel set and the second wheel set, so as to meet the braking requirement of the vehicle.
Further, the first circuit 11 and the second circuit 21 are respectively provided with the first check valve 12 and the second check valve 22, and when the main brake circuit or the mechanical brake circuit works, oil can be prevented from flowing back to the oilcan module through the first circuit 11 or the second circuit 21 under the action of the first check valve 12 and the second check valve 22.
In some embodiments, the mechanical brake circuit includes a first brake cylinder 510 and a second brake cylinder 520, wherein the first brake cylinder 510 is connected to the second reservoir 120 and the second brake cylinder 520 is connected to the third reservoir 130. Further, the first brake cylinder 510 is further connected between the first solenoid valve 311 and the first wheel set through a third solenoid valve 530, and the second brake cylinder 520 is further connected between the second solenoid valve 312 and the second wheel set through a fourth solenoid valve 540.
When the vehicle generates a braking request and realizes braking of the vehicle through a mechanical braking loop, the first electromagnetic valve 311 and the second electromagnetic valve 312 are kept in a closed state, the third electromagnetic valve 530 and the fourth electromagnetic valve 540 are kept in a conducting state, so that the pressure build-up cavity 310 and the first wheel set and the second wheel set are in a closed state, when a driver steps on the pedal 50, the first brake cylinder 510 and the second brake cylinder 520 can respectively extract oil in the second oil storage cavity 120 and the third oil storage cavity 130 to generate hydraulic pressure, then the first brake cylinder 510 can transmit the generated hydraulic pressure to the first wheel set through the third electromagnetic valve 530, and the second brake cylinder 520 can transmit the generated hydraulic pressure to the second wheel set through the fourth electromagnetic valve 540, so as to meet the braking requirement of the vehicle.
As shown in connection with fig. 1-2, in some embodiments, a first pressure sensor 810 is disposed between the first line 11 and the second build-up module, and a second pressure sensor 820 is disposed between the second line 21 and the second build-up module.
It will be appreciated that when the redundant brake circuit works, the second pressure building module extracts the oil in the second oil storage chamber 120 and the third oil storage chamber 130 through the first circuit 11 and the second circuit 21 respectively to build pressure and generate hydraulic pressure, in this process, the oil entering the second pressure building module from the first circuit 11 can pass through the first pressure sensor 810 and be detected, and the oil entering the second pressure building module from the second circuit 21 can pass through the second pressure sensor 820 and be detected, so that the hydraulic pressure in the redundant brake circuit can be monitored preferably. When the main brake circuit works, the pressure build-up cavity 310 extracts the oil in the first oil storage cavity 110 to build pressure and generate hydraulic pressure, in the process, the pressure build-up cavity 310 transmits the hydraulic pressure to the first wheel end through the first electromagnetic valve 311, the pressure build-up cavity 310 transmits the hydraulic pressure to the second wheel end through the second electromagnetic valve 312, in the process that the pressure build-up cavity 310 transmits the hydraulic pressure to the first wheel end through the first electromagnetic valve 311, the oil passes through the first circuit 11 and the second pressure build-up module, and in the process that the pressure build-up cavity 310 transmits the hydraulic pressure to the second wheel end through the second electromagnetic valve 312, the oil passes through the second circuit 21 and the second pressure build-up module, so that the first pressure sensor 810 and the second pressure sensor 820 can monitor the hydraulic pressure in the main brake circuit in a better mode when the main brake circuit works.
In some embodiments, the pedal feel module specifically includes a simulation chamber 610, wherein one end of the simulation chamber 610 can be connected to at least one of the second oil storage chamber 120 and the third oil storage chamber 130, and the other end of the simulation chamber 610 is connected between the pressure build chamber 310 and the first oil storage chamber 110.
Further, a sealing ring may be disposed in the simulation chamber 610, and the simulation chamber 610 may be isolated from the first oil storage chamber 110 and the pressure build chamber 310 by the sealing ring, so that the fourth pipeline 40 at the other end of the simulation chamber 610 may be omitted, so that the other end of the simulation chamber 610 is directly connected with air.
A hydraulic decoupled electro-hydraulic brake system of the present application is described in detail below with one example including a oilcan module, a wheel end module, a pedal feel module, a service brake circuit, a redundant brake circuit, and a mechanical brake circuit.
The oiler module has a first oil storage chamber 110, a second oil storage chamber 120, and a third oil storage chamber 130.
The wheel end module comprises a first wheel set and a second wheel set, wherein the first wheel set and the second wheel set comprise two wheels 210, and each wheel 210 is provided with a pressure increasing valve 211 and a first pressure reducing valve 212.
The main brake circuit comprises a pressure build-up cavity 310, a first electromagnetic valve 311 and a second electromagnetic valve 312, wherein the pressure build-up cavity 310 is connected to the first oil storage cavity 110 through a first pipeline 10, the pressure build-up cavity 310 is connected to the first wheel set through a second pipeline 20, the pressure build-up cavity 310 is connected to the second wheel set through a third pipeline 30, the first electromagnetic valve 311 is arranged on the second pipeline 20, and the second electromagnetic valve 312 is arranged on the third pipeline 30.
The redundant brake circuit comprises a first circuit 11, a second circuit 21 and a second pressure building module, and the second pressure building module comprises a redundant motor 410 and two pump bodies 420; one end of the first circuit 11 is connected with the second oil storage cavity 120, the other end of the first circuit 11 is connected with the second pipeline 20 between the first electromagnetic valve 311 and the first wheel set, one end of the second circuit 21 is connected with the third oil storage cavity 130, the other end of the second circuit 21 is connected with the third pipeline 30 between the second electromagnetic valve 312 and the second wheel set, the first circuit 11 is provided with the first one-way valve 12, and the second circuit 21 is provided with the second one-way valve 22; the redundant motor 410 is in communication with the second and third conduits 20, 30 through two pump bodies 420, respectively.
The mechanical brake circuit comprises a first brake cylinder 510, a second brake cylinder 520, a third electromagnetic valve 530 and a fourth electromagnetic valve 540, wherein the pedal 50 is directly connected with the first brake cylinder 510 and the second brake cylinder 520, the first brake cylinder 510 is connected with the second oil storage cavity 120 on one hand, and is connected with the second pipeline 20 between the first electromagnetic valve 311 and the first wheel set through the third electromagnetic valve 530 on the other hand, the second brake cylinder 520 is connected with the third oil storage cavity 130 on the one hand, and is connected with the third pipeline 30 between the second electromagnetic valve 312 and the second wheel set through the fourth electromagnetic valve 540 on the other hand.
The pedal feel module includes a simulation chamber 610 and a fifth solenoid valve 620, wherein one end of the simulation chamber 610 is connected to the first brake cylinder 510 through the fifth solenoid valve 620, and the other end of the simulation chamber 610 is communicated with the first pipe 10 through the fourth pipe 40.
Further, a sixth electromagnetic valve 710 is further disposed at a position of the second pipeline 20 near the first wheel set, and a seventh electromagnetic valve 720 is further disposed at a position of the third pipeline 30 near the second wheel set. An eighth solenoid valve 730 is provided in parallel with the sixth solenoid valve 710, and a ninth solenoid valve 740 is provided in parallel with the seventh solenoid valve 720.
Further, as shown in fig. 2-5, a filter screen 910 is further provided in the hydraulic decoupling electro-hydraulic brake system of the present application, where the filter screen 910 may be disposed at a liquid inlet and a liquid outlet of different devices, and of course, the filter screen 910 may also be disposed in an oil pipeline, for example, disposed on the first pipeline 10, the second pipeline 20, the third pipeline 30, the fourth pipeline 40, the first pipeline 11 or the second pipeline 21; impurities in the oil can be filtered through the filter screen 910, so that the cleaning of the oil is ensured, and the service life of the oil is prolonged.
Referring to fig. 1 and 3, when the vehicle adopts the main brake circuit, the third solenoid valve 530, the fourth solenoid valve 540, the eighth solenoid valve 730 and the ninth solenoid valve 740 are kept in the closed state, the first solenoid valve 311, the second solenoid valve 312 and the fifth solenoid valve 620 are kept in the open state, and the pressure build-up chamber 310 draws the oil in the first oil storage chamber 110 to build up pressure to generate hydraulic pressure, so that the hydraulic pressure is transferred to the first wheel set and the second wheel set through the second pipeline 20 and the third pipeline 30, respectively.
As shown in fig. 1 and 5, when the redundant brake circuit is used in the vehicle, the first, second, third, fourth, sixth and seventh solenoid valves 311, 312, 530, 540, 710 and 720 are kept closed, the fifth, eighth and ninth solenoid valves 620, 730 and 740 are kept on, and the redundant motor 410 draws oil in the second and third oil storage chambers 120 and 130 to build up pressure to generate hydraulic pressure to be transmitted to the first and second wheel sets.
Referring to fig. 1 and 4, when the vehicle adopts the mechanical brake circuit, the first solenoid valve 311, the second solenoid valve 312, the fifth solenoid valve 620, the eighth solenoid valve 730 and the ninth solenoid valve 740 are all kept in the closed state, the third solenoid valve 530 and the fourth solenoid valve 540 are kept in the conducting state, the first brake cylinder 510 extracts the oil in the second oil storage chamber 120 to build pressure and generate hydraulic pressure to transmit to the first wheel set, and the second brake cylinder 520 extracts the oil in the third oil storage chamber 130 to build pressure and generate hydraulic pressure to transmit to the second wheel set.
It should be noted that, in the present embodiment, when the oil leakage occurs in the pressure build-up chamber 310 of the main brake circuit, the second oil storage chamber 120 and the third oil storage chamber 130 can still have sufficient oil to satisfy the normal operation of the redundant brake circuit and the mechanical brake circuit because the pressure build-up chamber 310 is only connected with the first oil storage chamber 110. When the oil leakage occurs in the simulation chamber 610 of the pedal feel module, closing the fifth solenoid valve 620 will only result in the leakage of the first oil storage chamber 110, while the second and third oil storage chambers 120 and 130 can have sufficient oil to meet the normal operation of the redundant brake circuits and the mechanical brake circuits.
Further, when the main brake circuit, the redundant brake circuit and the mechanical brake circuit are all normal, when the braking requirement of the vehicle is large, for example, the vehicle needs 180bar of hydraulic pressure in total, and only 100bar of hydraulic pressure can be generated through the pressure build-up cavity 310 of the main brake circuit, at this time, the redundant brake circuit can assist to cooperate with the working of the main brake circuit, and the redundant brake circuit can work to generate 80bar of hydraulic pressure additionally, so that 180bar of hydraulic pressure can be provided for the wheel end module to meet the braking requirement of the vehicle.
In summary, the foregoing description is only of the preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the invention.
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410732959.8A CN118306361B (en) | 2024-06-07 | 2024-06-07 | A hydraulically decoupled electronic hydraulic brake system |
| PCT/CN2024/116379 WO2025251445A1 (en) | 2024-06-07 | 2024-09-02 | Hydraulically decoupled electro-hydraulic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410732959.8A CN118306361B (en) | 2024-06-07 | 2024-06-07 | A hydraulically decoupled electronic hydraulic brake system |
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| CN118306361A CN118306361A (en) | 2024-07-09 |
| CN118306361B true CN118306361B (en) | 2024-09-24 |
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| CN202410732959.8A Active CN118306361B (en) | 2024-06-07 | 2024-06-07 | A hydraulically decoupled electronic hydraulic brake system |
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| WO (1) | WO2025251445A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118306361B (en) * | 2024-06-07 | 2024-09-24 | 上海同驭汽车科技有限公司 | A hydraulically decoupled electronic hydraulic brake system |
| CN119428591B (en) * | 2025-01-13 | 2025-04-15 | 上海同驭汽车科技有限公司 | Hydraulic coupling type electronic hydraulic brake system, method and vehicle |
| CN119428615B (en) * | 2025-01-13 | 2025-04-18 | 上海同驭汽车科技有限公司 | Self-check method and vehicle |
| CN119459632A (en) * | 2025-01-16 | 2025-02-18 | 上海同驭汽车科技有限公司 | A hydraulic brake decoupling method |
| CN119568097B (en) * | 2025-02-07 | 2025-05-20 | 同济大学 | An electronic hydraulic brake system |
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| CN113830058A (en) * | 2021-11-05 | 2021-12-24 | 格陆博科技有限公司 | Line-controlled hydraulic braking system and method |
| CN217320333U (en) * | 2022-05-07 | 2022-08-30 | 中汽创智科技有限公司 | Redundant brake unit and brake system |
| CN218907206U (en) * | 2022-10-25 | 2023-04-25 | 芜湖伯特利汽车安全系统股份有限公司 | Redundant brake-by-wire hydraulic brake system |
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| US10730501B2 (en) * | 2013-03-15 | 2020-08-04 | ZF Active Safety US Inc. | Vehicle brake system with auxiliary pressure source |
| DE102019106274A1 (en) * | 2019-03-12 | 2020-09-17 | Wabco Gmbh | Electronically controllable braking system with two fall-back levels (alternative version) |
| CN110341674A (en) * | 2019-07-23 | 2019-10-18 | 芜湖伯特利汽车安全系统股份有限公司 | A kind of redundant structure and improved structure of double replenishment one-way valve in series for hydraulic control unit |
| CN110525409A (en) * | 2019-08-15 | 2019-12-03 | 芜湖伯特利汽车安全系统股份有限公司 | The redundancy service braking system of vehicle |
| DE102021201536A1 (en) * | 2021-02-18 | 2022-08-18 | Robert Bosch Gesellschaft mit beschränkter Haftung | Electrohydraulic power brake system for an autonomous motor vehicle |
| DE102021204253A1 (en) * | 2021-04-28 | 2022-11-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Hydraulic block for a service brake unit of a hydraulic power brake system |
| DE102021204255A1 (en) * | 2021-04-28 | 2022-11-03 | Robert Bosch Gesellschaft mit beschränkter Haftung | Hydraulic block for a service brake unit of a hydraulic power brake system |
| CN113147704B (en) * | 2021-05-28 | 2023-06-20 | 南京经纬达汽车科技有限公司 | Vehicle brake-by-wire system and braking method thereof |
| CN220721034U (en) * | 2023-09-12 | 2024-04-05 | 菲格智能科技有限公司 | Automatic driving braking system and vehicle |
| CN117584909A (en) * | 2023-10-31 | 2024-02-23 | 中汽创智科技有限公司 | A vehicle redundant braking system, control method and vehicle |
| CN118306361B (en) * | 2024-06-07 | 2024-09-24 | 上海同驭汽车科技有限公司 | A hydraulically decoupled electronic hydraulic brake system |
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| CN113830058A (en) * | 2021-11-05 | 2021-12-24 | 格陆博科技有限公司 | Line-controlled hydraulic braking system and method |
| CN217320333U (en) * | 2022-05-07 | 2022-08-30 | 中汽创智科技有限公司 | Redundant brake unit and brake system |
| CN218907206U (en) * | 2022-10-25 | 2023-04-25 | 芜湖伯特利汽车安全系统股份有限公司 | Redundant brake-by-wire hydraulic brake system |
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| WO2025251445A1 (en) | 2025-12-11 |
| CN118306361A (en) | 2024-07-09 |
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