CN107292671A - Used car detects the quantitative assessment method of parameter - Google Patents
Used car detects the quantitative assessment method of parameter Download PDFInfo
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- CN107292671A CN107292671A CN201710535207.2A CN201710535207A CN107292671A CN 107292671 A CN107292671 A CN 107292671A CN 201710535207 A CN201710535207 A CN 201710535207A CN 107292671 A CN107292671 A CN 107292671A
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Abstract
Used car detects the quantitative assessment method of parameter, with inspection used car vehicle type approval detect data, or with the technical parameter of specification, or standard limited value is multiplied by with δ, or with the test statistics value of the good vehicle of inspection vehicle technology status be used as the basic parameters of the various performance parameters of used car, by the quantitative detection various performance parameters of used car and the ratio or difference of basic parameter, ratio according to the different piece prices of automobile with respect to vehicle price, the size of fitment material and maintenance cost, and to security, fuel economy, reliability effect degree difference is come ratio of setting price, the ratio calculation declined by actual techniques situation deducts price, when the ratio that performance parameter actual techniques situation declines is bigger, the price ratio of deduction is bigger, price radix can be former new car price.
Description
Technical field
Used car detects the quantitative assessment method of parameter, is according to the various performance detection parameters of used car and basic parameter
Ratio, the ratio calculation declined by actual techniques situation deducts a kind of quantitative assessment method of price, belongs to by the actual property of detection
Can parameter calculate the technical field of cost performance.
Background technology
Prior art used car appraisal, usually in accordance with the service life of used car, distance travelled, function it is complete
Property, accidentality etc. evaluate, both quantitatively detect the various performance parameters of used car, also not detection parameter and basic parameter
It is compared, the ratio calculation more not declined by actual techniques situation deducts price, due to being difficult to confirm used car mileage number
According to authenticity, easily cause wrong appraisal.The actual techniques situation of used car is the key factor of appraisal, to overcome existing skill
The deficiency of art, used car detects the quantitative assessment method of parameter, and by detecting the various performance parameters of used car, statistics and determination are each
The basic parameter of performance parameter is planted, the ratio that actual techniques situation declines is determined according to the two ratio or difference, by ratiometer
Calculate and deduct price.
The content of the invention
It is determined that used car actual techniques situation decline ratio when, to determine that various performances are joined by testing or counting
Several basic parameters, basic parameter can be examined vehicle type approval detection data, or specification technical parameter,
Either standard limited value is multiplied by with δ or it is the test statistics value of the examined good vehicle of vehicle technology status.By quantitative detection two
The ratio or difference of the various performance detection parameters of handcart and basic parameter, according to the different piece prices of automobile with respect to vehicle price
The size of ratio, fitment material and maintenance cost and counted to security, fuel economy, reliability effect degree are different
Price ratio is calculated, when the ratio that actual techniques situation declines is bigger, the price ratio of deduction is bigger, when technology status does not decline
The price of the parameter is not deducted then, price radix can be former new car price, and such as changing price radix can be counted by mathematics difference
Calculation obtains equivalent price ratio.Specific calculating price ratio is as follows.
1st, the price ratio A of engine power parameter.Power is determined with the specified torsion of engine specification or rated power is made
On the basis of parameter, when it is θ a that used car, which detects the power ratio of real engine power and specification, A=(0.3~0.5) ×
(1-θa).It can assert that the technology status of the parameter does not decline when (1- θ a)≤0.05, the parameter does not deduct price.
2nd, the price ratio B of engine fuel consumption per hundred kilometers parameter.Using the new car pattern authentication checks data of the vehicle as
Basic parameter, if light-duty passenger-car, the fuel consumption per hundred kilometers parameter using type approval urban district state of cyclic operation as basic parameter,
If gross mass is more than 3500kg car or lorry then with 60km/h or 50km/h constant speed the examination of road hundred kilometers of oil of type approval
Consumption parameter is used as basic parameter.With the fuel consumption per hundred kilometers of one cycle detection used car of urban district state of cyclic operation, when the actual hair of detection
When the ratio between motivation fuel consumption per hundred kilometers and the basic parameter of type approval are θ b, B=(0.4~0.6) × (θ b-1).When (θ b-1)≤
It can assert that the technology status of the parameter does not decline when 0.03, the parameter does not deduct price.
3rd, the price ratio C of engine exhaust emission parameter.By operating condition method detection waste gas discharge, Light-Duty Gasoline Vehicle is with nitrogen oxygen
Compound parameter is calculated, and diesel vehicle is calculated with the absorption coefficient of light or absorptivity, if δ=0.8, is arranged with in-use automotive standard waste gas
The 80% of limit value is put as basic parameter, when detecting the ratio between actual waste gas discharge parameter and basic parameter for θ c, C=(0.1~
0.3)×(θc-1).It can assert that the technology status of the parameter does not decline when (θ c-1)≤0, the parameter does not deduct price.
4th, the price ratio D of brake-performance parameters.Detected on drum braking platform, the braking of detection is registered with new car
Standard limited value is as basic parameter, when the difference for the unbalance factor for detecting actual axle braking force unbalance factor and basic parameter is θ d
When, D=(0.2~0.4) × θ d.It can assert that the technology status of the parameter does not decline as θ d≤0, the parameter does not deduct valency
Lattice；When actually detected braking ratio per axle, brake force unbalance factor, vehicle braking ratio are exceeded not with respect to the Brake Standards limit value of in-use automotive
When qualified, D=0.1 is taken, usually requires that maintenance is allowed to qualified.
5th, the price ratio E of suspension absorptivity parameter.If δ=1.5, in-use automotive suspension absorptivity standard limited value is 40%,
δ × 40%=1.5 × 40%=60% is not less than as basic parameter using the absorptivity that wheel is measured on stand, when benchmark ginseng
When the difference of number absorptivity 60% and actually detected wheel absorptivity is θ e, E=(0.05~0.10) × θ e.Can as θ e≤0
Assert that the technology status of the parameter does not decline, the parameter does not deduct price；When the actual suspension absorptivity of detection is with respect to in-use automotive
Standard limited value it is exceeded unqualified when, take E=0.05, usually require that maintenance is allowed to qualified.
6th, the price ratio F of transmission resistance parameter.With the good vehicle of inspection vehicle technology status, by experiment or count
Fiducial temperature state under transmission resistance as basic parameter, when detection actual transmission system's drag parameter and basic parameter it
During than for θ f, F=(0.03~0.05) × (θ f-1).It can assert that the technology status of the parameter does not decline when (θ f-1)≤0,
The parameter does not deduct price.
7th, the price ratio G of headlamp light intensity parameter.Made with the headlamp light intensity standard limited value that new car registers detection
On the basis of parameter, qualified G=0, unqualified then G=0.006~0.01, when the light for detecting actual headlamp light intensity in-use automotive relatively
When standard limited value is exceeded unqualified by force, E=0.008~0.012 is taken, usually requires that maintenance is allowed to qualified.
8th, steering system loads the price ratio H of gap parameter.With the good vehicle of inspection vehicle technology status, by experiment or
The steering system loading gap of statistics is as basic parameter, when the ratio between detection actual steering system loading gap parameter and basic parameter are
During θ h, H=(0.05~0.07) × (θ h-1).It can assert that the technology status of the parameter does not decline when (θ h-1)≤0, the ginseng
Number does not deduct price.
9th, the price ratio I of driveline wear gap parameter.With the good vehicle of inspection vehicle technology status, by experiment or
The driveline wear gap of statistics is as basic parameter, when the ratio between detection actual transmission system's wearing clearance parameter and basic parameter are
During θ i, I=(0.03~0.05) × (θ i-1).It can assert that the technology status of the parameter does not decline when (θ i-1)≤0, the ginseng
Number does not deduct price.
10th, the price ratio J of speedometer parameter.Using standard limited value as basic parameter, when detecting unqualified, J=
0.006~0.01.As the qualified parameter does not deduct price.
Used car detects the quantitative assessment method of parameter, can use middle price ratio according to detection parameter by computer
It is automatic to calculate, can also buyer determine that the price ratio less than normal or bigger than normal of different parameters is manually counted according to the weighting point of oneself
Calculate, or according to different class of vehicle and demand, it is convenient to omit the price ratio of partial properties parameter is calculated, such as used car
Handling transfer need to detect that braking ability and high beam light intensity are qualified, and the price ratio that can omit the two parameter is calculated；Car
Also pattern depth, lorry, which can be increased, can increase the price ratio calculations such as the symmetrical height of vehicle body.When a certain performance parameter has several
Individual detection data, decline maximum data to calculate with technology status.
If former new car price is R, the quantitative assessment of used car detection parameter should deduct price=(A+B+C+D+E+F+G+H+
I+J) × R, the price ratio of each parameter calculates no particular order.Control and operating function with reference to hand inspection used car,
Visual examination each several part instrument and parts, check whether used car had the accidentality such as collision, water logging, carry out corresponding deduction valency
Lattice, computing depreciation expense, it is considered to cost performance fluctuation of technological progress etc., can obtain accurate used car reference price.Detection
Parameter, basic parameter, each parameter price ratio of calculating and deduction price can the publicities on used car site.
Used car detects the quantitative assessment method of parameter, is the ratio according to the various performance parameters of used car and basic parameter
Value, calculates a kind of quantitative assessment method for deducting price, it is characterised in that：With inspection used car vehicle type approval detect number
According to or with specification technical parameter or with δ be multiplied by standard limited value or with the good vehicle of inspection vehicle technology status
Test statistics value be used as the basic parameters of the various performance parameters of used car, join by the various performance detections of quantitative detection used car
The ratio or difference of number and basic parameter, ratio, fitment material and dimension according to the different piece prices of automobile with respect to vehicle price
Accomplish this size and to security, fuel economy, reliability effect degree difference come ratio of setting price, work as performance
Detect that the ratio that parameter actual techniques situation declines is bigger, the price ratio of deduction is bigger, does not deduct the ginseng when not declining then
Several prices, price radix can be former new car price；Calculate hundred kilometers of price ratio A, the engine of engine power parameter
It is the price ratio B of fuel consumption parameters, the price ratio C of engine exhaust emission parameter, the price ratio D of brake-performance parameters, outstanding
The price ratio E of frame absorptivity parameter, the price ratio F of transmission resistance parameter, the price ratio G of headlamp light intensity parameter,
The price ratio H of steering system loading gap parameter, the price ratio I of driveline wear gap parameter, the price of speedometer parameter
Ratio J, can be with new car price R as price radix, and the quantitative assessment of used car detection parameter should deduct price=(A+B+C+
D+E+F+G+H+I+J) × R, or the price of calculating section performance parameter can be omitted according to different class of vehicle and demand
Ratio.
Embodiment
Illustrate that used car detects the specific of the quantitative assessment method of parameter by taking a second-hand passenger car detection parameter as an example
Embodiment, ten thousand yuan of vehicle new car price R=15.6, price ratio takes median.
1st, the nominal torque power ratio of detection real engine nominal torque power and specification is θ a=0.83, is started
The price ratio A=0.4 of acc power parameter × (1- θ a)=0.4 × 0.17=0.068.
2nd, the ratio between detection real engine fuel consumption per hundred kilometers and the basic parameter of type approval are θ b=1.09, engine hundred
The price ratio B=0.5 of gas mileage parameter × (θ b-1)=0.5 × 0.09=0.045.
3rd, detect that actual waste gas discharge the ratio between nitrogen oxides parameter and basic parameter are θ c=1.16, engine exhaust emission
The price ratio C=0.2 of parameter × (θ c-1)=0.2 × 0.16=0.032.
4th, it is θ d=3%, braking to detect the maximum difference of the unbalance factor of actual axle braking force unbalance factor and basic parameter
The price ratio D=0.3 of performance parameter × θ d=0.3 × 0.03=0.009.
5th, basic parameter absorptivity 60% and the maximum difference of actually detected wheel absorptivity are θ e=15%, suspension absorption
The price ratio E=0.075 of rate parameter × θ e=0.075 × 0.15=0.0113.
6th, detection the ratio between actual transmission system's drag parameter and basic parameter is θ f=1.68, the price of transmission resistance parameter
Ratio F=0.04 × (θ f-1)=0.04 × 0.68=0.0272.
7th, the powerful headlamp light intensity standard limited value that detection is registered in new car of actual upper beam, upper beam are detected
The price ratio G=0 of strong parameter.
8th, detection actual steering system loading the ratio between gap parameter and basic parameter is θ h=1.63, steering system loading gap ginseng
Several price ratio H=0.06 × (θ h-1)=0.06 × 0.63=0.0378.
9th, detection the ratio between actual transmission system's wearing clearance parameter and basic parameter is θ i=1.72, driveline wear gap ginseng
Several price ratio H=0.04 × (θ i-1)=0.04 × 0.72=0.0288.
10th, speedometer and mileometer are qualified, the price ratio J=0 of speedometer and mileometer parameter.
The quantitative assessment of used car detection parameter should deduct price=(A+B+C+D+E+F+G+H+I+J) × R=(0.068+
0.045+0.032+0.009+0.0113+0.0272+0+0.0378+0.0288+0) × 15.6=0.2591 × 15.6=4.042
Wan Yuan.
Used car detects the quantitative assessment method of parameter, is declined according to the technology status of the various performance detection parameters of used car
Degree, quantitatively calculates the price that should be deducted, have the advantages that it is accurate, reasonable, calculate automatically.
Claims (1)
- It is the ratio according to the various performance parameters of used car and basic parameter 1. used car detects the quantitative assessment method of parameter, Calculate a kind of quantitative assessment method for deducting price, it is characterised in that：With inspection used car vehicle type approval detection data, Or with the technical parameter of specification or with δ be multiplied by standard limited value or with the good vehicle of inspection vehicle technology status examination Test the basic parameter that statistical value is used as the various performance parameters of used car, by it is quantitative detection the various performance detection parameters of used car with The ratio or difference of basic parameter, according to automobile difference, piece price is relative to the ratio of vehicle price, fitment material and repairs into This size and to security, fuel economy, reliability effect degree difference come ratio of setting price, work as performance detection The ratio that parameter actual techniques situation declines is bigger, and the price ratio of deduction is bigger, does not deduct the parameter when not declining then Price, price radix can be former new car price；Calculate price ratio A, the engine fuel consumption per hundred kilometers of engine power parameter The price ratio B of parameter, the price ratio C of engine exhaust emission parameter, the price ratio D of brake-performance parameters, suspension are inhaled The price ratio E of yield parameter, the price ratio F of transmission resistance parameter, the price ratio G of headlamp light intensity parameter, steering The price ratio H of system's loading gap parameter, the price ratio I of driveline wear gap parameter, the price ratio of speedometer parameter J, can be with new car price R as price radix, and the quantitative assessment of used car detection parameter should deduct price=(A+B+C+D+E+ F+G+H+I+J) × R, or the price ratio of calculating section performance parameter can be omitted according to different class of vehicle and demand.
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| CN201710535207.2A CN107292671A (en) | 2017-06-23 | 2017-06-23 | Used car detects the quantitative assessment method of parameter |
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| CN201710535207.2A CN107292671A (en) | 2017-06-23 | 2017-06-23 | Used car detects the quantitative assessment method of parameter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109840824A (en) * | 2017-11-29 | 2019-06-04 | 保固国际企业有限公司 | The car fare price comparing system of worldwide vehicle |
| CN109993563A (en) * | 2018-01-02 | 2019-07-09 | 优估（上海）信息科技有限公司 | A kind of management method of vehicle assessment, apparatus and system |
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| US20130173481A1 (en) * | 2006-08-17 | 2013-07-04 | Experian Information Solutions, Inc. | System and method for providing a score for a used vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20171024 |
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