GB/T 26991-2023 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 26991-2023 | English | 260 |
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Test methods for power performance of fuel cell electric vehicles
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| GB/T 26991-2011 | English | 85 |
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Fuel cell electric vehicles -- Maximum speed test method
| Obsolete |
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GB/T 26991-2023: Test methods for power performance of fuel cell electric vehicles---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT26991-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080.01
CCS T 47
Replacing GB/T 26991-2011
Test methods for power performance of fuel cell electric
vehicles
Issued on. DECEMBER 28, 2023
Implemented on. JULY 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Test conditions... 6
5 Test vehicle preparation... 11
6 Test items... 11
7 Test method... 13
Appendix A (Normative) Determination method of correction factor on circular road
... 22
1 Scope
This document describes the test methods for power performance – such as acceleration
performance, maximum speed and gradeability – of fuel cell electric vehicles.
This document applies to the power performance tests of M and N fuel cell electric
vehicles using compressed hydrogen (hereinafter referred to as “vehicles”).
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
GB/T 3730.2, Road vehicle - Masses - Vocabulary and codes
GB/T 12428, Laden mass calculating method for bus
GB/T 12534, Motor vehicles - General rules of road test method
GB/T 12539, Motor vehicles steep hill climbing test method
GB/T 12545.1-2008, Measurement methods of fuel consumption for automobiles
- Part 1.Measurement methods of fuel consumption for passenger cars
GB/T 15089, Classification of power-driven vehicles and trailers
GB 18384, Electric vehicles safety requirements
3 Terms and definitions
The following terms and definitions, as well as those determined by GB/T 12539, GB/T
15089, GB 18384, GB/T 18385, GB/T 19596, GB/T 19752 and GB/T 24548, are
applicable to this document.
3.1
rechargeable electrical energy storage system mode
A driving mode where the energy or power of vehicle is only provided by the
rechargeable electrical energy storage system (REESS).
4 Test conditions
4.1 Environmental requirements
4.1.1 Atmospheric temperature and atmospheric pressure
The atmospheric temperature shall be 0 ℃ ~ 40 ℃; the atmospheric pressure shall be
91 kPa ~ 104 kPa.
4.1.2 Air density
The air density during the test is calculated from Formula (1). Compared with the air
density in the standard environment, the variation shall not exceed 7.5%.
4.1.4 Relative humidity
The relative humidity shall be less than 95%, and the test shall not be conducted in rainy
or foggy days.
4.2 Test equipment
See Table 1 for the measurement parameters, units and accuracy.
4.3 Test mass and load distribution
4.3.1 General requirements
When conducting the maximum thirty-minutes speed test, maximum speed test and
acceleration performance test, the vehicle shall be loaded according to the requirements
in 4.3.2 and 4.3.3; when conducting the 4% and 12% speed uphill test, maximum
gradient and hill starting ability test, the vehicle shall be loaded according to the
maximum authorized pay mass (including the mass of the tester and instrument), and
the load shall be uniformly distributed and firmly fixed.
4.4 Vehicle conditions
4.4.1 The shape structure and technical parameters of the vehicle must be maintained
as that when it leaves the factory.
4.4.2 The vehicle under test shall be loaded according to the technical requirements in
4.3.
4.5 Road conditions
4.5.1 General conditions
The test shall be conducted on a dry straight or circular track. The pavement shall be
hard, flat, clean and good in adhesion coefficient.
4.5.2 Straight conditions
The length of measurement area shall be at least 1 000 m.
The acceleration area shall be long enough so that the vehicle can achieve the maximum
speed within 200 m before entering the measurement area. The longitudinal gradient of
both the measurement area and the area 200 m after the acceleration area shall not
exceed 0.5%. The longitudinal gradient of the acceleration area shall not exceed 4%.
The lateral gradient of the measurement area shall not exceed 3%.
4.5.3 Circular track
The length of the circular track shall be at least 1 000 m. The circular track is not a
complete circle, but being connected by a linear part and a part approximate to a ring.
The curvature radius of the curve shall be no less than 200 m.
4.5.5 Test gradient
As shown in Figure 1, the length of the test road ramp shall be no less than 20 m. A
transition section shall be arranged in front and at back of the test section. The straight
and flat section before the slope shall be no less than 8 m. The ramp pavement shall be
flat, solid, dry, uniform in gradient and good in adhesion performance.
5 Test vehicle preparation
5.1 Hydrogenation
Hydrogen shall be added according to the manufacturer’s hydrogenation procedures.
5.2 Power regulation of conventional REESS
To ensure the normal operation of fuel cell system in the vehicle and avoid the single
operation of REESS during test, perform the power regulation of REESS in the
following procedures before test.
5.3 Warm-up
Before carrying out the test, warm up the vehicle system and components that may
affect the test result, so as to meet the manufacturer’s requirement for stable temperature.
6 Test items
6.1 Arrangement of test items
For the externally rechargeable and non-externally rechargeable vehicles, arrange the
test items as follows.
7 Test method
7.1 Maximum speed test
7.1.1 Standard test procedures (two-direction test)
The standard test procedures are as follows.
7.1.2 Test procedures in single direction
The test procedures in single direction are as follows.
7.1.3 Maximum speed test procedures on circular road
The maximum speed test procedures on the circular road are as follows.
7.3 Acceleration capacity test
7.3.1 Acceleration capacity test procedures
7.3.3 Data processing
7.3.3.1 Data calculation
Calculate the arithmetic mean, standard deviation and variation factor (standard
deviation/arithmetic mean) of all effective test data according to Formula (11), Formula
(12) and Formula (13).
7.4 Speed uphill test (unnecessary for the fuel cell electric vehicles other than M1,
M2 and N1 vehicles)
7.5 Maximum gradient test
The maximum gradient test procedures are as follows.
Appendix A
(Normative)
Determination method of correction factor on circular road
A.1 Determine the fixed correction factor k on circular road based on the maximum
allowable speed on a circular road.
A.2 Determine the correction factor based on multiple speed measurements and control
the continuous speed difference of two continuous measurements to be less than 30
km/h.
A.3 For each vehicle speed, the following two test methods shall be carried out, while
maintaining the same motor speed, according to the requirements of this document.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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