CN1195213C - Inertia increment and decrement method of detecting inertia, resistance and power of vehicle - Google Patents
Inertia increment and decrement method of detecting inertia, resistance and power of vehicle Download PDFInfo
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- CN1195213C CN1195213C CNB011114061A CN01111406A CN1195213C CN 1195213 C CN1195213 C CN 1195213C CN B011114061 A CNB011114061 A CN B011114061A CN 01111406 A CN01111406 A CN 01111406A CN 1195213 C CN1195213 C CN 1195213C
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- inertia
- speed
- resistance
- power
- inertial flywheel
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Abstract
The present invention relates to a method for detecting inertia, resistance and horse power for vehicles by increasing and reducing inertia. The present invention is characterized in that the engagement and disengagement of an inertia flywheel are respectively carried out during the detection processes of two times on a chassis dynamometer provided with an inertia flywheel, a system freely slide at the maximum vehicle speed to zero, and the change time of the vehicle speed is measured in a specified sliding vehicle speed interval; therefore, the deceleration, the resistance and the loss power of an average speed point in each vehicle speed interval of the system are obtained, and the equivalent inertia weight of the system can also be obtained. The present invention is suitable for detecting the vehicle dynamic quality, an ASM working condition and the fuel economy; the present invention has simple control system, high detection precision and convenient operation.
Description
Technical field
The present invention is that automobile is on the inertia-type or loaded type chassis dynamometer of band inertial flywheel, by clutch coupling combination and disengagement inertial flywheel, inertia, resistance and the loss power method of twice art skating detection system of increase and decrease inertia belong to bench teat automotive performance detection method technical field.
Background technology
Automobile all needs inertia, resistance and the loss power of detection system in the enterprising action edge of chassis dynamometer, fuel economy detection and gasoline car ASM operating condition method toxic emission detection etc.On the loaded type chassis dynamometer, can adopt freedom and load twice coastdown and detect automobile inertia, resistance and loss power, owing to reasons such as loading force fluctuation and coasting time weak points, accuracy of detection is not high.On the inertia-type chassis dynamometer,, be difficult to carry out free and twice coastdown of loading owing to there is not charger.Adopt the present invention, need not to load and detect loading force, coasting time is longer, and the accuracy of detection height is applicable to loaded type and inertia-type chassis dynamometer.
Summary of the invention
On the main drum shaft termination of inertia-type or loaded type chassis dynamometer, generally an inertial flywheel is installed by clutch coupling, when carrying out Automobile Dynamic Performance Measurement, the inertia-type chassis dynamometer is in conjunction with inertial flywheel on the clutch coupling band, and loaded type chassis dynamometer then holdback clutch is not with inertial flywheel.
1, detects principle
The principle that increase and decrease inertia detects automobile inertia, resistance and power method is: the equivalent inertia m of accurate Calculation inertial flywheel and flywheel shaft
1,, obtain resistance and the loss power of inertial flywheel at each speed of a motor vehicle point by coasting test.Making system is zero from the max. speed art skating until the speed of a motor vehicle at the vehicle specifies state, twice testing process thrown off respectively and in conjunction with inertial flywheel, the instantaneous speed of a motor vehicle and the time in the process is slided in measurement, thereby the system that obtains average retardation rate of average speed point in each speed of a motor vehicle interval in the process of sliding, can list two equations, at 2 equations of identical speed of a motor vehicle point simultaneous solution, can get resistance, the loss power of system's equivalent inertia and each speed of a motor vehicle point.
1.1 inertial flywheel resistance F
F1iWith loss power P
F1iDetermine
The equivalent inertia m of accurate Calculation inertial flywheel and flywheel shaft
1, and the input computing machine, motor-driven chassis dynamometer system or master rotor system are to max. speed, and the power failure machine is thrown off the inertial flywheel clutch and is had a high regard for the inertial flywheel art skating, measures each the instantaneous speed of a motor vehicle and time, can get the resistance F of each speed of a motor vehicle point Vi of flywheel
F1i=m
1(V
I+1-V
I-1)/(t
I-1-t
I+1)
V
I+1, V
I-1---2 speed of a motor vehicle m/s of i+1 and i-1
V
i---the average speed V in i+1 and 2 speed of a motor vehicle intervals of i-1
i=(V
I+1+ V
I-1)/2
t
I+1, t
I-1---the time S that i+1 and i-1 are 2
m
1---flywheel and flywheel shaft equivalent inertia kg
F
F1i---V
iThe resistance N of speed of a motor vehicle point
And can get each speed of a motor vehicle point V
iLoss power P
F1i=F
F1iV
i/ 1000kw
Behind the periodic calibrating F
F1iAnd P
F1iPut constant resistance and loss power input computing machine as each speed of a motor vehicle of flywheel.
1.2 increase and decrease inertia detects the calculating of automobile inertia, resistance and power
Detecting the kinematic train loss power with automobile on the loaded type chassis dynamometer is example, and the kinematic train loss power equals chassis dynamometer own loss power, wheel and cylinder friction loss power and vehicle chassis power train loss power three sum.
Turbine unloading, vehicle pine tar door after accelerating to max. speed on the chassis dynamometer is hung twice art skating of neutral gear (or holdback clutch) increase and decrease inertia, and a process is for throwing off inertial flywheel, and another process is in conjunction with inertial flywheel.
A, (system's equivalent inertia equals m to throw off the inertial flywheel art skating
2+ m
3)
F
fi＝(m
2+m
3)(V
i+1-V
i-1)/(t
i-1-t
i+1)………(1)
m
2---throw off the chassis dynamometer equivalent inertia kg of inertial flywheel
m
3---the equivalent inertia kg of institute's inspection vehicle neutral gear chassis power train
V
I+1, V
I-1---throw off the speed of a motor vehicle m/s of 2 of inertial flywheel art skating i+1 and i-1
t
I+1, t
I-1---throw off the time s of 2 of inertial flywheel art skating i+1 and i-1
F
Fi---throw off inertial flywheel at V
iThe resistance N of speed of a motor vehicle point, V
i=(V
I+1+ V
I-1)/2
B, (system's equivalent inertia equals m in conjunction with the inertial flywheel art skating
1+ m
2+ m
3)
F
f1i+F
fi＝(m
1+m
2+m
3)·(V′
i+1-V′
i-1)/(t′
i-1-t′
i+1)……(2)
T '
I+1, t '
I-1---in conjunction with the time S of 2 of inertial flywheel art skating i+1 and i-1
V '
I+1, V '
I-1-in conjunction with the speed of a motor vehicle m/S of 2 of inertial flywheel art skating i+1 and i-1
Make (V
I+1-V
I-1)/(t
I-1-t
I+1)=a
1i, (V '
I+1-V '
I-1)/(t '
I-1-t '
I+1)=a
2i, in identical vehicle velocity V
iSimultaneous solution (1) formula and (2) formula get:
m
2+m
3＝(F
f1i-m
1·a
2i)/(a
2i-a
1i)…………(3)
In (3) formula, m
1For calculating known quantity, the speed of a motor vehicle and time are detection known quantity, a
2iAnd a
1iBe known quantity, F
F1iAlso be the known quantity that deposits computing machine in, can get the equivalent inertia m of system by (3) formula
2+ m
3
Because the stable state detection power is generally thrown off inertial flywheel on the loaded type chassis dynamometer, detect chassis output P
Di, m
2+ m
3Substitution (1):
F
fi＝(F
f1i-m
1·a
2i)·a
1i/(a
2i-a
1i)……(4)
And can this speed of a motor vehicle dot system loss power P
Fi=F
FiV
i/ 1000kw
With engine output net power P
Si=P
Di+ P
Fi
As known from the above: combination and twice art skating of disengagement inertial flywheel increase and decrease inertia, three general forms of system during not with inertial flywheel: system's equivalent inertia equals (F
F1i-m
1A
2i)/(a
2i-a
1i) kg; V
iThe SR of speed of a motor vehicle point equals (F
F1i-m
1A
2i) a
1i/ (a
2i-a
1i) N; And V
iThe system loss power of speed of a motor vehicle point equals (F
F1i-m
1A
2i) a
1iV
i/ 1000 (a
2i-a
1i) kw.
2, chassis dynamometer system equivalent inertia and resistance, loss power
A master rotor and a pair cylinder are tied, drive chassis dynamometer to max. speed with motor and electric motor clutch, the power failure machine is also thrown off electric motor clutch, appoint chassis dynamometer system throwing off and, can detect the equivalent inertia m of system of chassis dynamometer (not with inertial flywheel) by general form respectively in conjunction with twice art skating of inertial flywheel increase and decrease inertia
2, and can get the SR F of chassis dynamometer at each speed of a motor vehicle point
F2iWith loss power P
F2i
3, the detection of automobile chassis drive system equivalent inertia
Twice art skating of institute's inspection vehicle neutral gear increase and decrease inertia obtains the equivalent inertia m of system from (3) formula
2+ m
3, deduct m
2Promptly obtain the chassis power train equivalent inertia m of this vehicle
3
4, the detection of wheel cylinder equivalent coefficient of rolling resistance fi
Driving wheel of vehicle is placed on the chassis dynamometer, remove the left and right wheels semiaxis, with motor and the anti-system of dragging of electric motor clutch to max. speed, the power failure machine is thrown off electric motor clutch, combination and disengagement inertial flywheel increase and decrease twice art skating of inertia respectively, can obtain the SR of each speed of a motor vehicle point by general form, after SR deducts the chassis dynamometer resistance, get final product wheel cylinder resistance F
F4iSo, wheel cylinder equivalent coefficient of rolling resistance fi=F that can this vehicle
F4i/ G
1, G
1---the heavy N of driving shaft axle, fi input computing machine.
5, regulation gear automobile power-transmission system (containing engine) equivalent inertia m
4Detect
Driving wheel of vehicle is reached chassis dynamometer, remove spark plug, fuel injector or the inlet and exhaust valve bar of engine, reduce cylinder air pressure and reduce the anti-power that drags.Automobile gearbox hangs up the regulation gear, after arriving certain speed of a motor vehicle with motor and the anti-system of dragging of electric motor clutch earlier, the power failure machine is thrown off electric motor clutch, respectively combination and twice art skating of disengagement inertial flywheel increase and decrease inertia, can detect system's equivalent inertia of throwing off inertial flywheel by general form, deduct m
2, can stipulate gear automobile power-transmission system equivalent inertia m
4
6, on the inertia-type chassis dynamometer, the m of a typical vehicle detection of each vehicle
1, m
2, m
3, m
4With the parameter of fi input computing machine as this vehicle, by patent of invention " inertia test table process of detecting power of vehicle " ZL00122435.2, can detect the dynamic output power of automobile chassis, engine inertia accelerating power, kinematic train loss power, engine output net power and automobile chassis drive system efficiency.
7, on the loaded type chassis dynamometer, the relevant parameter m of a typical vehicle of each vehicle
3, m
4, f
iThe input computing machine is as the parameter of this vehicle, by patent of invention " sliding calibration process of determining automobile chassis drive system efficiency " ZL00118930.1, can detect automotive wheel cylinder resistance, by detecting chassis output and kinematic train loss power, can obtain engine output net power and automobile chassis drive system efficiency.And detect that turbine loads and simulating vehicle road examination fuel economy detects turbine the simple and reliable method that provides is provided for accurate simulation ASM operating condition method waste gas.
Increase and decrease inertia detects automobile inertia, resistance and power method and has following outstanding feature: the accuracy of detection height, and simple in structure, easy to operate.
Embodiment
On homemade chassis dynamometer, an inertial flywheel by electromagnetic clutch control is arranged usually, and test the speed, time set and demarcation motor, can measure the instantaneous speed of a motor vehicle and time in the process of sliding very accurately.
Claims (5)
1, a kind of increase and decrease inertia detects automobile inertia, resistance and power method, be that automobile detects automobile inertia, resistance and power on chassis dynamometer, feature of the present invention is: on the chassis dynamometer of band inertial flywheel, and the equivalent inertia m of first accurate Calculation inertial flywheel and flywheel shaft
1,, obtain the resistance F of inertial flywheel at each speed of a motor vehicle point by coasting test
FliWith loss power P
Fli, and the input computing machine; Making system then is zero from the max. speed art skating until the speed of a motor vehicle in specified states, slide that testing process is thrown off respectively for twice and in conjunction with inertial flywheel, the instantaneous speed of a motor vehicle and the time in the process is slided in measurement, thereby the system that obtains retarded velocity of average speed point in each speed of a motor vehicle interval in the process of sliding, and can be in conjunction with increasing and decreasing twice art skating of inertia, the SR of the equivalent inertia of system, each speed of a motor vehicle point and system loss power during not with inertial flywheel with the disengagement inertial flywheel.
2, detect automobile inertia, resistance and power method according to the described a kind of increase and decrease inertia of claim 1, it is characterized in that: master rotor and auxiliary cylinder are tied, the anti-chassis dynamometer power failure machine to the max. speed that drags, appoint chassis dynamometer system to throw off respectively and, can detect the equivalent inertia m of system of the chassis dynamometer of not being with inertial flywheel in conjunction with twice art skating of inertial flywheel increase and decrease inertia
2, and the SR of each speed of a motor vehicle point and loss power.
3, detect automobile inertia, resistance and power method according to the described a kind of increase and decrease inertia of claim 1, it is characterized in that: vehicle pine tar door after accelerating to max. speed on the chassis dynamometer is hung neutral gear or holdback clutch, twice art skating of increase and decrease inertia can detect kinematic train equivalent inertia m
2+ m
3, and the SR and the loss power of each speed of a motor vehicle point; The equivalent inertia m of system
2+ m
3Deduct m
2, promptly obtain the chassis power train equivalent inertia m of this vehicle
3
4, detect automobile inertia, resistance and power method according to the described a kind of increase and decrease inertia of claim 1, it is characterized in that: driving wheel of vehicle is placed on the chassis dynamometer, remove the left and right wheels semiaxis, the anti-system's power failure machine to the max. speed that drags, combination and disengagement inertial flywheel increase and decrease twice art skating of inertia respectively, can obtain the SR of each speed of a motor vehicle point, after SR deducts the chassis dynamometer resistance, can obtain wheel cylinder resistance, so wheel cylinder equivalent coefficient of rolling resistance f that can this vehicle
i, and the input computing machine.
5, detect automobile inertia, resistance and power method according to the described a kind of increase and decrease inertia of claim 1, it is characterized in that: driving wheel of vehicle is reached chassis dynamometer, remove spark plug, fuel injector or the inlet and outlet door bar of engine, automobile gearbox hangs up the regulation gear, the anti-system's power failure machine to certain speed of a motor vehicle that drags, combination and twice art skating of disengagement inertial flywheel increase and decrease inertia can detect system's equivalent inertia of throwing off inertial flywheel respectively, deduct m
2, can stipulate gear automobile power-transmission system equivalent inertia m
4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011114061A CN1195213C (en) | 2001-03-04 | 2001-03-04 | Inertia increment and decrement method of detecting inertia, resistance and power of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011114061A CN1195213C (en) | 2001-03-04 | 2001-03-04 | Inertia increment and decrement method of detecting inertia, resistance and power of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1336293A CN1336293A (en) | 2002-02-20 |
| CN1195213C true CN1195213C (en) | 2005-03-30 |
Family
ID=4659032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011114061A Expired - Fee Related CN1195213C (en) | 2001-03-04 | 2001-03-04 | Inertia increment and decrement method of detecting inertia, resistance and power of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1195213C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141702A (en) * | 2018-08-24 | 2019-01-04 | 智车优行科技（上海）有限公司 | A kind of driving motor inner walkway method and system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430709C (en) * | 2002-09-08 | 2008-11-05 | 吴明 | Multifunctional device for testing simulated load of cars |
| CN100343648C (en) * | 2004-08-28 | 2007-10-17 | 吴明 | System testing method of multiple working condition loading of vehicle table amalog road test |
| CN100516802C (en) * | 2005-12-16 | 2009-07-22 | 比亚迪股份有限公司 | Inertia determination of automobile |
| CN101363772B (en) * | 2007-08-10 | 2010-05-26 | 比亚迪股份有限公司 | Method for measuring highest stabilizing speed of automobile |
| CN101858813A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for base inertia of chassis electric dynamometer |
| CN102346100B (en) * | 2010-08-02 | 2013-09-11 | 北汽福田汽车股份有限公司 | Method and device for judging preheating state of vehicle |
| CN103471752B (en) * | 2013-09-20 | 2016-04-06 | 华东交通大学 | A kind of method measuring single cylinder dynamometer machine autophage power |
-
2001
- 2001-03-04 CN CNB011114061A patent/CN1195213C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141702A (en) * | 2018-08-24 | 2019-01-04 | 智车优行科技（上海）有限公司 | A kind of driving motor inner walkway method and system |
| CN109141702B (en) * | 2018-08-24 | 2021-03-23 | 智车优行科技（上海）有限公司 | Method and system for testing internal resistance of driving motor |
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| Publication number | Publication date |
|---|---|
| CN1336293A (en) | 2002-02-20 |
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Addressee: Hao Xiangchen Document name: Notice of publication of application for patent for invention |
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