CN108757155B - Venturi tube-based turbocharging system and working method thereof - Google Patents

Abstract

The invention relates to a turbocharging system based on a Venturi tube, which comprises a diesel engine, wherein the front end of the diesel engine is provided with an air inlet main path, the air inlet main path is provided with a compressor A, the rear end of the diesel engine is provided with an exhaust main path, the exhaust main path is provided with the Venturi tube, and the rear end of the Venturi tube is provided with a turbine which is coaxially linked with the compressor A; the invention also relates to a working method of the Venturi tube based turbocharging system. The invention can utilize the Venturi tube to adjust the flow speed and the pressure of the waste gas of the diesel engine, thereby adjusting the rotating speed and the efficiency of the turbine and the gas compressor at the front end of the diesel engine and relieving the condition of oxygen deficiency of the diesel engine caused by turbine delay.

Description

A Venturi-based turbocharger system and its working method

technical field

The invention relates to a turbocharging system based on a venturi tube and a working method thereof.

technical background

A turbocharger is actually an air compressor that increases the amount of intake air by compressing it. It uses the inertial momentum of the exhaust gas discharged from the engine to push the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which presses the air sent from the air filter pipeline to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously, the impeller compresses more air into the cylinder, and the increase in air pressure and density can burn more fuel, correspondingly increase the fuel amount and adjust the engine speed, It can increase the output power of the engine. However, as far as the current traditional turbocharger is concerned, the utilization rate of exhaust gas is low, and the disadvantage of the turbocharger is lag, that is, due to the inertia of the impeller, the response to sudden changes in the throttle is slow, so that the engine delays to increase or decrease the output power, For a car that is going to accelerate suddenly or overtake, it will feel a little underwhelming in an instant.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a turbocharging system based on a venturi tube and a working method thereof, which can use the venturi tube to adjust the flow rate and pressure of the exhaust gas of the diesel engine, and then adjust the turbine and the compressor at the front end of the diesel engine. Speed and efficiency, reduce turbo lag and lead to oxygen starvation in diesel engines.

The technical scheme of the present invention is as follows: a turbocharger system based on a venturi tube, comprising a diesel engine, an intake main circuit is arranged at the front end of the diesel engine, a compressor A is arranged on the intake main road, and an exhaust main circuit is arranged at the rear end of the diesel engine , a venturi tube is arranged on the exhaust main road, and a turbine coaxially linked with the compressor A is arranged at the rear end of the venturi tube.

Further, at the throat position of the venturi tube, there is a supply air path, and along the supply direction of the supply air path, a compressor B, a gas storage tank A and a gas storage tank B are sequentially arranged, and the compressor B A solenoid valve A is arranged between the gas supply tank A, and a solenoid valve B is arranged between the gas supply tank A and the gas supply tank B.

Further, an exhaust branch A and an exhaust branch B are provided in connection with the exhaust main circuit, and the intake end of the exhaust branch A is connected with the exhaust main circuit at the front end of the venturi tube, and the exhaust branch The outlet end of A is connected to the main exhaust circuit between the venturi tube and the turbine, the intake end of the exhaust branch B is connected to the main exhaust circuit at the front end of the venturi tube, and the outlet end of the exhaust branch B is connected to the gas Air tank A is connected.

Further, a solenoid valve C is arranged on the exhaust branch A, and a solenoid valve D is arranged on the exhaust branch B.

Another technical solution provided by the present invention is: a working method of a turbocharging system based on a venturi tube, including a turbocharging system based on a venturi tube;

(1) Manually start the diesel engine and control the diesel engine to run under low working conditions. Manually control solenoid valve C and solenoid valve D to close, and solenoid valve B to open. At this time, the exhaust gas generated by the diesel engine flows into the venturi and turbine through the main exhaust path. When the exhaust gas flows through the throat of the venturi tube, because the throat of the venturi tube is thinner, the flow rate is accelerated, and the vacuum formed at the throat of the venturi tube is relatively large, and the gas in the gas storage tank A is the same as the venturi tube. A positive pressure difference is formed at the throat, and the gas in the gas storage tank A flows through the solenoid valve B and the gas storage tank B, and flows into the throat of the venturi pipe, and supplies gas to the main exhaust path to improve the low working condition. The flow of gas entering the turbine down, and then the gas between the outlet of the venturi tube and the turbine is gathered, the gas pressure between the outlet of the venturi tube and the turbine is increased, and the pressure difference between the front end and the rear end of the turbine increases. It will increase the speed of the turbine, drive the compressor A coaxially linked with the turbine to speed up, speed up the delivery of gas to the diesel engine, and slow down the hypoxia of the diesel engine caused by turbo lag. When the gas pressure in the gas storage tank A drops to When the value is set, solenoid valve A and compressor B are automatically opened to supply gas to gas storage tank A;

(2) When the diesel engine is running under medium working conditions, the exhaust gas of the diesel engine is relatively large at this time, and the solenoid valve A and solenoid valve D are manually controlled to close, and the solenoid valve B and solenoid valve C are opened. At this time, the exhaust gas generated by the diesel engine is discharged. The main gas circuit and the exhaust branch A jointly exhaust the turbine. At this time, the air pressure in the gas storage tank A and the throat of the venturi tube form a positive pressure difference, and the gas in the gas storage tank A flows through the electromagnetic Valve B and gas storage tank B then flow into the Venturi tube, where they merge with the diesel exhaust gas, increasing the pressure at the front end of the turbine under medium working conditions, improving the efficiency and speed of the turbine, and at the same time improving the compressor A coaxially linked with the turbine. When the gas pressure in the gas storage tank A drops to the set value, the solenoid valve A and the compressor B are automatically opened to supplement the gas storage tank A;

(3) When the diesel engine is under high load or full load operation, manually control solenoid valve B, solenoid valve C and solenoid valve D to open, at this time, the exhaust gas volume of the diesel engine reaches a critical value, and the amount of exhaust gas discharged is large. The turbine cannot discharge all the exhaust gas in time, and it forms a pile in the exhaust pipe and generates a large pressure. Part of the exhaust gas that cannot be discharged in time flows through the exhaust branch B, through the electromagnetic D, and flows into the gas storage tank A for storage. The other part flows into the gas storage tank B and the gas storage tank A through the throat of the venturi tube. When the air pressure in the gas storage tank A and the gas storage tank B reaches the set value, the solenoid valve A opens, and the The excess exhaust gas is discharged into the air through compressor B.

Compared with the prior art, the beneficial effects of the present invention are:

(1) The Venturi tube can be used to adjust the flow rate and pressure of the exhaust gas of the diesel engine, thereby adjusting the speed and efficiency of the compressor at the front end of the turbine and the diesel engine, and slowing down the hypoxia of the diesel engine caused by the turbo lag;

(2) This Venturi-based exhaust emission structure has a good effect on protecting the turbine and compressor, and at the same time, the exhaust gas is charged and recycled to the gas storage tank for the next use, which is to burn the fuel. The waste heat is reused to improve fuel economy;

(3) At the same time, under the transient condition, that is, the condition of sudden acceleration or sudden deceleration, since the position of the gas storage tank B is relatively close to the throat of the Venturi tube, when the diesel engine operating condition suddenly changes, the gas storage Tank B will form a certain gas compensation or buffer effect, which can improve the smoothness of the intake and exhaust of the diesel engine and the hysteresis of the turbocharger under variable working conditions.

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the working schematic diagram of the present invention during low working condition operation;

Fig. 3 is the working schematic diagram of the present invention when the medium working condition is running;

Fig. 4 is the working schematic diagram of the present invention when running at full load;

In the figure: 1-diesel engine; 2-solenoid valve D; 3-gas storage tank A; 4-solenoid valve A; 5-compressor B; 6-solenoid valve B; 7-gas storage tank B; 8-ventu Inside pipe; 9-solenoid valve C; 10-turbine; 11-compressor A.

Detailed ways

As shown in Figures 1 to 4, a Venturi-based turbocharger system includes a diesel engine 1. The front end of the diesel engine 1 is provided with a main intake path, the main intake path is provided with a compressor A11, and the rear end of the diesel engine 1 is provided with a The main exhaust path is provided with a venturi 8, and the rear end of the venturi 8 is provided with a turbine 10 coaxially linked with the compressor A11.

In this embodiment, a gas supply air path is provided at the throat position of the venturi 8, and a compressor B5, a gas storage tank A3 and a gas storage tank B7 are sequentially arranged along the supply direction of the gas supply gas path. A solenoid valve A4 is provided between the compressor B5 and the supplemental gas tank A, and a solenoid valve B6 is provided between the supplemental gas tank A and the gas supplementation tank B.

In this embodiment, an exhaust branch A and an exhaust branch B are provided in connection with the exhaust main circuit. The intake end of the exhaust branch A is connected to the exhaust main circuit at the front end of the venturi The outlet end of the air branch A is connected to the main exhaust circuit between the venturi 8 and the turbine 10, the intake end of the exhaust branch B is connected to the main exhaust at the front end of the venturi 8, and the exhaust branch The outlet end of road B is connected to the gas storage tank A3.

In this embodiment, a solenoid valve C9 is provided on the exhaust branch A, and a solenoid valve D2 is provided on the exhaust branch B.

A working method of a Venturi-based turbocharging system, comprising a Venturi-based turbocharging system;

(1) Manually start diesel engine 1, control diesel engine 1 to run under low working conditions, manually control solenoid valve C9 and solenoid valve D2 to close, and solenoid valve B6 to open, at this time, the exhaust gas generated by diesel engine 1 flows into Venturi tube 8 through the main exhaust path With the turbine 10, when the exhaust gas flows through the throat of the venturi tube 8, because the throat of the venturi tube 8 is thinner, the flow velocity is accelerated, and the vacuum degree formed at the throat of the venturi tube 8 is larger, and the gas storage tank is A positive pressure difference is formed between the gas in A3 and the throat of the venturi 8, the gas in the gas storage tank A3 flows through the solenoid valve B6 and the gas storage tank B7, flows into the throat of the venturi 8, and exhausts The main circuit is supplemented with air to increase the gas flow rate entering the turbine 10 under low working conditions, so that the gas between the air outlet of the Venturi tube 8 and the turbine 10 is gathered, and the gap between the air outlet of the Venturi tube 8 and the turbine 10 is increased. The gas pressure increases, so that the pressure difference between the front end and the rear end of the turbine 10 increases, thereby increasing the speed of the turbine 10, driving the compressor A11 coaxially linked with the turbine 10 to speed up the speed, accelerating the gas delivery into the diesel engine 1, and slowing down the turbine 10. The hysteresis leads to the lack of oxygen in the diesel engine 1. When the gas pressure in the gas storage tank A3 drops to the set value, the solenoid valve A4 and the compressor B5 are automatically opened to supplement the gas storage tank A3;

(2) When the diesel engine 1 is running in a medium working condition, the exhaust gas displacement of the diesel engine 1 is relatively large. The solenoid valve A4 and the solenoid valve D2 are manually controlled to close, and the solenoid valve B6 and the solenoid valve C9 are opened. The exhaust gas is exhausted to the turbine 10 through the exhaust main road and the exhaust branch A. At this time, the air pressure in the gas storage tank A3 and the throat of the venturi tube 8 form a positive pressure difference. The gas flows through the solenoid valve B6 and the gas storage tank B7, and then flows into the Venturi tube 8, where it merges with the exhaust gas of the diesel engine 1, which increases the pressure at the front end of the turbine 10 under medium working conditions, improves the efficiency and speed of the turbine 10, and improves the The speed of the compressor A11 coaxially linked with the turbine 10 slows down the hypoxia of the diesel engine 1 caused by the hysteresis of the turbine 10. When the gas pressure in the gas storage tank A3 drops to the set value, the solenoid valve A4 and the compressor B5 automatically Open, and supply gas to the gas storage tank A3;

(3) When the diesel engine 1 is under high load or full load operation, the solenoid valve B6, solenoid valve C9 and solenoid valve D2 are manually controlled to open. At this time, the exhaust gas volume of the diesel engine 1 reaches the critical value, and the exhaust gas volume is discharged. Large, the turbine 10 cannot discharge all the exhaust gas in time, and a buildup is formed in the exhaust pipeline and a large pressure is generated. Part of the exhaust gas that cannot be discharged in time flows through the exhaust branch B, through the electromagnetic D, and flows into the gas storage tank A3 For storage, the other part flows into the gas storage tank B7 and the gas storage tank A3 through the throat of the venturi 8. When the air pressure in the gas storage tank A3 and the gas storage tank B7 reaches the set value, the solenoid valve A4 opens, and the excess exhaust gas is discharged into the air through compressor B5.

The above-mentioned operation process and software and hardware configuration are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent transformation made by the contents of the description and accompanying drawings of the present invention is used directly or indirectly in related technical fields. , are similarly included in the scope of patent protection of the present invention.

Claims (2)

1. a turbocharging system based on a venturi tube, is characterized in that: comprising a diesel engine, the front end of the diesel engine is provided with an air intake main road, the air intake main road is provided with a compressor A, and the rear end of the diesel engine is provided with an exhaust main road, A venturi tube is arranged on the main exhaust road, a turbine coaxially linked with the compressor A is arranged at the rear end of the venturi tube, and an exhaust branch A and an exhaust branch B are arranged in connection with the exhaust main road, The intake end of the exhaust branch A is connected to the exhaust main circuit at the front end of the venturi tube, the outlet end of the exhaust branch A is connected to the exhaust main road between the venturi tube and the turbine, and the exhaust branch The inlet end of the road B is connected to the main exhaust circuit at the front end of the venturi tube, and the outlet end of the exhaust branch circuit B is connected to the gas storage tank A. A solenoid valve D is arranged on the gas branch B, and a supplemental gas path is arranged at the throat of the venturi pipe, and a compressor B, a gas gas storage tank A and a gas gas storage tank are arranged in sequence along the gas supplementation direction of the gas supplementary gas path. Tank B, a solenoid valve A is provided between the compressor B and the gas supplement tank A, and a solenoid valve B is provided between the gas supplement tank A and the gas supplement tank B. 2. A working method of a Venturi-based turbocharging system, comprising the Venturi-based turbocharging system as claimed in claim 1, wherein: (1) Manually start the diesel engine and control the diesel engine to run under low working conditions. Manually control solenoid valve C and solenoid valve D to close, and solenoid valve B to open. At this time, the exhaust gas generated by the diesel engine flows into the venturi and turbine through the main exhaust path. When the exhaust gas flows through the throat of the venturi tube, because the throat of the venturi tube is thinner, the flow rate is accelerated, and the vacuum formed at the throat of the venturi tube is relatively large, and the gas in the gas storage tank A is the same as the venturi tube. A positive pressure difference is formed at the throat, and the gas in the gas storage tank A flows through the solenoid valve B and the gas storage tank B, and flows into the throat of the venturi pipe, and supplies gas to the main exhaust path to improve the low working condition. The flow of gas entering the turbine down, and then the gas between the outlet of the venturi tube and the turbine is gathered, the gas pressure between the outlet of the venturi tube and the turbine is increased, and the pressure difference between the front end and the rear end of the turbine increases. It will increase the speed of the turbine, drive the compressor A coaxially linked with the turbine to speed up, speed up the delivery of gas to the diesel engine, and slow down the hypoxia of the diesel engine caused by turbo lag. When the gas pressure in the gas storage tank A drops to When the value is set, solenoid valve A and compressor B are automatically opened to supply gas to gas storage tank A; (2) When the diesel engine is running under medium working conditions, the exhaust gas of the diesel engine is relatively large at this time, and the solenoid valve A and solenoid valve D are manually controlled to close, and the solenoid valve B and solenoid valve C are opened. At this time, the exhaust gas generated by the diesel engine is discharged. The main gas circuit and the exhaust branch A jointly exhaust the turbine. At this time, the air pressure in the gas storage tank A and the throat of the venturi tube form a positive pressure difference, and the gas in the gas storage tank A flows through the electromagnetic Valve B and gas storage tank B then flow into the Venturi tube, where they merge with the diesel exhaust gas, increasing the pressure at the front end of the turbine under medium working conditions, improving the efficiency and speed of the turbine, and at the same time improving the compressor A coaxially linked with the turbine. When the gas pressure in the gas storage tank A drops to the set value, the solenoid valve A and the compressor B are automatically opened to supplement the gas storage tank A; (3) When the diesel engine is under high load or full load operation, manually control solenoid valve B, solenoid valve C and solenoid valve D to open, at this time, the exhaust gas volume of the diesel engine reaches a critical value, and the amount of exhaust gas discharged is large. The turbine cannot discharge all the exhaust gas in time, and it forms a pile in the exhaust pipe and generates a large pressure. Part of the exhaust gas that cannot be discharged in time flows through the exhaust branch B, through the electromagnetic D, and flows into the gas storage tank A for storage. The other part flows into the gas storage tank B and the gas storage tank A through the throat of the venturi tube. When the air pressure in the gas storage tank A and the gas storage tank B reaches the set value, the solenoid valve A is opened, and the The excess exhaust gas is discharged into the air through compressor B.

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