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GB/T 19752-2005 English PDF (GBT19752-2005)

GB/T 19752-2005 English PDF (GBT19752-2005)

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GB/T 19752-2005: Hybrid electric vehicles -- Power performance -- Test method

This Standard specifies the test method for power performance of hybrid electric vehicles. This Standard applies to the vehicle categories defined in GB/T 15089, including M1, M2, M3, N1, N2 and N3.
GB/T 19752-2005
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.080.01
T 47
Hybrid electric vehicles ?€? Power performance ?€? Test method
ISSUED ON. MAY 23, 2005
IMPLEMENTED ON. OCTOBER 1, 2005
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and definitions ... 4
4 Principle ... 6
5 Parameters, units and tolerances of measurements ... 7
6 Test conditions ... 7
7 Preconditioning of the vehicle... 9
9 Test method ... 10
Hybrid electric vehicles ?€? Power performance ?€? Test method
1 Scope
This Standard specifies the test method for power performance of hybrid electric vehicles.
This Standard applies to the vehicle categories defined in GB/T 15089, including M1, M2, M3, N1, N2 and N3.
2 Normative References
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigenda) or revisions do not apply to this Standard. However, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 3730.2, Road vehicle ?€? Masses - Vocabulary and codes (GB/T 3730.2-1996, idt ISO 1176.1990)
GB/T 12548, Motor vehicles speedometer and odometer calibration method
GB/T 15089, Classification of power-driven vehicles and trailers (eqv ECE R 3.1997) GB/T 18385-2001, Electric vehicles - Power performance - Test method (eqv ISO/DIS 8715.1997)
GB/T 19596-2004, Terminology of electric vehicles
3 Terms and definitions
For the purposes of this Standard, the following terms and definitions, and those defined in GB/T 3730.2 and GB/T 19596-2004, apply.
3.1
hybrid mode
The driving mode in which all the on board energy sources, including internal combustion engine (or other thermal engines) and motor, are available to participate to the propulsion of the vehicle, according to the management system logic (complete vehicle control strategy).
3.2
pure thermal mode
The driving mode in which only the internal combustion engine (or other thermal engines) delivers energy for traction purpose.
3.3
pure electric mode
The driving mode when only the motor delivers energy for traction purpose. 3.4
maximum speed in hybrid mode
The highest average value of the speed, which the vehicle can maintain in hybrid mode over a distance of 1 km according to the procedure described in 9.1.
3.5
acceleration ability 0 ~ 100 km/h (0 to 50 km/h)
The shortest time required to accelerate the vehicle in hybrid mode from 0 km/h to 100 km/h according to the procedure described in 9.3 (when the maximum speed of a hybrid electric vehicle is less than 110 km/h, test the acceleration performance 0 ~ 50 km/h).
3.6
speed uphill ability in hybrid mode
The maximum speed which the vehicle can maintain in hybrid mode at given slopes (4% and 12%) over a distance of 1 km according to the procedure described in 9.6. 3.7
maximum thirty minute speed in hybrid mode
The maximum thirty minute speed is the highest average value which the vehicle can maintain in hybrid mode for thirty minutes according to the procedure described in 9.7. 3.8
hill starting ability in hybrid mode
6.2 Ambient conditions
6.2.1 The outdoor ambient temperature for the test shall be 5??C ~ 32??C. 6.2.2 The indoor ambient temperature for the test shall be 20??C ~ 30??C. 6.2.3 The atmospheric pressure shall be 94 kPa ~ 104 kPa.
6.2.4 The average wind speed measured at a height of 0.7 m above the ground shall be less than 3 m/s, gusts shall be less than 5 m/s.
6.2.5 The relative humidity shall be less than 95%.
6.2.6 Rain and fog shall be absent for the outdoor test.
6.3 Road conditions
The measurements shall be performed on a dry track, which is either a straight track or a loop track. The surface of the track shall be hard, smooth, clean and give good adhesion.
6.3.1 Straight track
The length of the measuring zone shall be at least 1,000 m.
The length of the launching tracks shall be long enough to achieve a stable speed 200 m ahead of the measuring zone. The longitudinal slope on the measuring zone and on the last 200 m of the launching tracks shall not exceed 0.5%. The longitudinal slope on the launching tracks shall not exceed 4%. The transverse slope on the measuring zone shall not exceed 3%.
In order to reduce the influence of factors such as road slope and wind direction/speed, the test shall be executed in both directions of travel, taking care to use the same stretch of the track. When conditions preclude performing the test in both directions, a single direction test shall be carried out in accordance with 6.3.4.
6.3.2 Loop track
The length of the loop shall not be less than 1,000 m. The loop track may vary from a perfect circle to straight sections. The radius of curves shall not be less than 200 m. For measuring speeds, the length of run shall be the distance actually covered by the vehicle while it is being timed.
The longitudinal slope in the measuring zone shall not exceed 0.5%. The effects of centrifugal force shall be compensated by the transverse profile of the curves in such as way that the vehicle holds a normal line without any action on the steering wheel. 6.3.3 Test slope
The length of the slope shall not be less than 25 m; there is a smooth, straight section 9.3.4 Record the shortest time necessary from depressing the accelerator pedal to achieve a 100 km/h speed.
9.3.5 Perform the same test in the opposite track direction.
The 0 km/h to 100 km/h acceleration value is the arithmetical average between the two measured values.
NOTE. If the maximum speed in hybrid mode is lower than 110 km/h, the acceleration test shall be done from 0 km/h to 50 km/h, with the same test procedure.
9.4 Acceleration 0 km/h ~ 50 km/h in pure electric mode
Follow the same procedure as in 7.5 (acceleration test 0 ~ 50 km/h) of GB/T 18385- 2001.
9.5 Speed uphill in pure electric mode
Follow the same procedure as in 7.7 (speed uphill test) of GB/T 18385-2001. 9.6 Speed uphill in hybrid mode
9.6.1 Load the vehicle with the test mass, which shall be uniformly distributed in the passenger and load compartments.
9.6.2 Arrange the vehicle on the chassis dynamometer. The rolls inertia shall be set to the maximum design total mass value.
9.6.3 Set up the bench with a load corresponding to a 4% slope.
9.6.4 Depress fully the accelerator pedal to accelerate the test vehicle or use an appropriate gear to accelerate to the maximum speed uphill.
9.6.5 Maintain the speed uphill over a distance of 1 km, within a tolerance of ?? 1 km/h, and record the time t for running for 1 km.
9.6.6 Set up the bench with a load corresponding to a 12% slope.
9.6.7 Repeat the tests of 9.6.3 and 9.6.5.
9.6.8 The test result is calculated using the following formula.
where.
V ?€? the actual maximum speed uphill, in km/h;
t ?€? the time for running for 1 km, in s.
9.7 Maximum thirty minute speed in hybrid mode
where.
M ?€? the maximum design total mass of the vehicle under test, in kilograms; R ?€? the rolling resistance coefficient conventionally equal to 0.01;
the mass ??M shall be uniformly distributed in the passenger and load compartments. d) run the vehicle over a distance of at least 10 m.
9.9.3 Calculation of actual ??0
With the peak torque and the tyre rolling radius of a known driving system (combination of thermal engine and motor), the hill starting ability can be calculated approximately using the following formula.
After obtaining ??0, obtain the maximum slope for hill starting ability using the following formula.
where.
Cr ?€? the rolling torque of the wheel, in N??m;
Ca ?€? the rolling torque of the driving system, in N??m;
T ?€? the total gear ratio;
??t ?€? the gear efficiency;
Ft ?€? the total traction force, in N;
r ?€? the tyre dynamic loaded radius, in m;
g ?€? the acceleration of gravity, in m/s2.
9.10 Maximum slope uphill test in hybrid mode
9.10.1 Load the vehicle with the test mass, which shall be uniformly distributed in the passenger and load compartments.
9.10.2 Stop the vehicle on a straight road section near the slope.

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