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GB/T 26991-2011 PDF in English

GB/T 26991-2011 (GB/T26991-2011, GBT 26991-2011, GBT26991-2011)
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GB/T 26991-2011: PDF in English (GBT 26991-2011)

GB/T 26991-2011
ICS 71.080.01
T 47
Fuel cell electric vehicles –
Maximum speed test method
(ISO/TR 11954.2008, Fuel cell road vehicles -
Maximum speed measurement, MOD)
Issued by. General Administration of Mass Supervision, Inspection and
Standardization Administration Committee
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Measurement parameters, units and accuracy ... 6 
5 Requirements ... 7 
Annex A ... 13 
Annex B ... 14 
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard modified and adopted ISO/TR 11954.2008 Fuel cell road
vehicles - Maximum speed measurement. This Standard was redrafted in
accordance with ISO/TR 11954.2008. Annex A lists out the comparison on
clause number between this Standard and ISO/TR 11954.2008.
The main technical differences between this Standard and ISO/TR 11954.2008,
as well as the reasons, are as follows.
- adjusted application range of this Standard according to the categories of
domestic fuel cell vehicles. This Standard applies to all hybrid electric
vehicles which use compressed hydrogen fuel cell; added corresponding
requirements; deleted corresponding content of pure electric vehicles and
fuel cell in application scope (see Clause 1 of this Standard; Clause 1 of
ISO/TR 11954.2008);
- considering the provisions of current fuel vehicles methodological
standards related to road on test mass in China, modified vehicle test
mass (see 3.4 of this Standard; 2.5 of ISO/TR 11954.2008);
- modified the length of circular runway measurement area FROM at least
2000 m TO at least 1000 m (see of this Standard; of
ISO/TR 11954.2008);
- modified wind speed measurement height FROM 1 m from ground TO 1.2
m (see 5.4.2 of this Standard; 4.4.2 of ISO/TR 11954.2008);
- modified repeatability limits of circular runway measurement data from
“each traveling speed difference does not exceed 3%” to “each
measurement time does not exceed 3%” (see 5.5.5 of this Standard; 4.5.5
of ISO/TR 11954.2008);
- added test vehicle preparation and general test requirements according
to characteristics of fuel cell electric vehicles (see 5.5.1 and 5.5.3 of this
- added the provisions of “the time interval of two maximum vehicle speed
tests does not exceed 5 min” due to characteristics of fuel cell electric
vehicles, so as to well-reflect the vehicle's maximum speed (see
of this Standard);
- respectively specified the maximum speed test methods under hybrid
mode and RESS mode (see and of this Standard);
- modified “changes in travel speed in bidirectional testing procedures of
the maximum speed on the straightaway testing procedures does not
exceed” 2% to 3%; modified the test at each direction from “not less than
3 times” to “2 times”; modified the continuous repetition in test procedures
in single direction from 5 driving tests to 3 driving tests (see and of this Standard; of ISO/TR 11954.2008).
This Standard shall be under the jurisdiction of China National Automotive
Standardization Technical Committee (SAC/TC 114).
Main drafting organizations of this Standard. China Automotive Technology and
Research Center, Tongji University, Shanghai Motor Vehicle Inspection Center,
Shanghai Automotive Company, Tsinghua University.
Main drafters of this Standard. Zhao Jingwei, Hou Yongping, Miao Wenquan,
He Yuntang, Feng Lizhong, Zhang Yingnan, Chen Quanshi.
Fuel cell electric vehicles –
Maximum speed test method
1 Scope
This Standard specifies maximum speed test method of fuel cell hybrid electric
This Standard is applicable to fuel cell hybrid electric vehicle which uses
compressed hydrogen (FCHEV).
2 Normative references
The following referenced documents are indispensable for the application 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 18385 Electric vehicles - Power performance - Test method (GB/T
18385-2005, ISO 8715.2001, MOD)
GB/T 19596-2004 Terminology of electric vehicles (ISO 8713.2002, NEQ)
ISO/TS 14687-2 Hydrogen fuel - Product specification - Part 2. Proton
exchange membrane (PEM) fuel cell applications for road vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T
19596-2004 apply.
3.1 rechargeable energy storage system RESS
The part of system for transmission of electrical energy and energy storage,
and this part or system is rechargeable.
Tor example, power battery, super capacitor.
3.2 maximum speed
The highest stable average speed at which the vehicle can maintain according
Speed km/h ±1% 0.2
Mass kg ±0.5% 1
5 Requirements
5.1 General
The maximum speed measurement shall be carried out according to the
following requirements.
5.2 Vehicle conditions
5.2.1 Maintain the shape structure and technical parameters of vehicle of exit-
5.2.2 The vehicle should be clean. Windows and intake port shall be closed,
unless this test has special requirements.
5.2.3 In addition to the necessary test equipment and vehicle daily operating
parts, it shall turn off the lighting equipment and auxiliary device on vehicle.
5.2.4 In addition to driving use, other energy storage systems shall be
charged to the maximum value stipulated by vehicle manufacturer (electricity,
hydraulic pressure and pneumatic pressure, etc.)
5.2.5 Mechanical moving part’s lubricant viscosity and tire pressure shall
comply with the provisions of vehicle manufacturer.
5.2.6 Carry out running-in to transmission system and tires according to
requirements of instructions on use of vehicle manufacturer.
5.2.7 The vehicle shall use hydrogen fuel that is consistent with test
requirements. In case of any dispute, fuel requirements shall comply with the
provisions of ISO/TS 14687-2.
5.3 Road characteristics
5.3.1 General
The test shall be carried out on straightaway (see 5.3.2) and/or circular runway
(see 5.3.3). The runway surface should be hard, smooth, clean, dry and with
good adhesion coefficient.
5.3.2 Straightaway Length
Choose equipment of suitable precision and appropriate method to measure
road length L and driving time t. It shall require the difference between
calculated speed and actual speed not exceed ±1%. The length of runway
measurement area shall be at least 1000 m and be marked by bench-mark.
The actual road length shall be recorded in the report. Acceleration area
The runaway acceleration area shall have same features with measurement
area, be straight, so as to ensure that the vehicle can stably maintain at the
maximum speed before it reaches to the measurement area. Slope Longitudinal
The longitudinal slope of acceleration area and measurement area shall not
exceed 0.5%. Transverse
The transverse slope of measurement area shall not exceed 3%. Selection on circular runway
If some part of circular runway meets requirements of 5.3.1 ~, and its
centrifugal counterforce is less than 20% of vehicle test mass, and can be
compensated by the transverse slope of runway, then this part of this circular
runway shall be deemed as “straight runaway”.
5.3.3 Circular runway Length
The length of circular runway measurement area shall at least be 1000 m. In
order to calculate the maximum speed, the driving distance shall be the
vehicle’s actual driving distance.
The circular runway is joined by straight part and approximate circular part. If
the measurement sampling area of test contains the circular part of runaway,
the curve radius of circular part shall not be less than 200 m. The compensation
of such centrifugal force through road transverse slope shall be able to ensure
vehicle’s normal driving without any steering operation. Circular runway correction factor
Annex B gives the test method to determine correction factor. The correction
factor shall not exceed 5%. If the speed regulator installed on test vehicle works,
the correction is not required.
5.5.3 General test requirements If the vehicle has the operation mode which driver can manually
choose, it shall respectively measure the maximum speed under hybrid mode
and pure electric RESS mode. Maximum speed test under pure electric RESS mode
Measure the maximum speed by the test method specified in GB/T 18385. Maximum speed test under hybrid mode
The maximum speed test method under hybrid mode shall be carried out
according to the following provisions.
- Load test vehicle to test mass. The added load shall be evenly distributed
on passenger seat / in passenger box;
- During maximum speed measurement, vehicle shall be accelerated at the
maximum, s...
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.