GB/T 35349-2017Parking brake performance test methods for vehicles (English PDF)
汽车驻车制动性能检验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 29, 2017
Implementation date
July 1, 2018
Scope
GB/T 35349-2017 is the English-translated version of 汽车驻车制动性能检验方法.
GB/T 35349-2017 is the Chinese standard "Parking Brake Performance - Test Methods for Vehicles". Its scope clause reads: This Standard specifies the parking brake performance test methods for vehicles.
This Standard is applicable to all kinds of vehicles and combination of vehicles running on China's roads. Its clauses include terms and definitions; test conditions; test methods.
It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on DECEMBER 29, 2017 and took effect on JULY 01, 2018.
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Document preview — GB/T 35349-2017
National Standard of the People's Republic of China
- ICS
- 43.180
- Classification
- T 40
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative References4
- 3 Terms and Definitions4
- 4 Test Conditions5
- 5 Test Methods5
- Bibliography10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
1 Scope
This Standard specifies the parking brake performance test methods for vehicles.
This Standard is applicable to all kinds of vehicles and combination of vehicles running on China's roads.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB 7258 Safety Specifications for Power-Driven Vehicles Operating on Roads
GB/T 13564 Roller Opposite Forces Type Automobile Brake Tester
GB 21861 Items and Methods of Motor Vehicles Safety Technology Inspection
GB/T 28529 Platform Brake Tester
GB/T 28948 Commercial Vehicle - Front Towing Attachments
GB 32087 Towing Devices for Light-Duty Vehicle
3 Terms and Definitions
The following terms and definitions and those ones stipulated in GB 7258 and GB 21816 are applicable to this document.
3.1 Parking brake performance
The parking capability of vehicle on the ramp.
3.2 Parking ramp
5 Test Methods
5.3.2 Test methods
5.3.2.1 The tested vehicle is gliding at a speed of 5km/h ~ 10km/h; after placing the transmission in the neutral (the vehicle with automatic transmission can be placed in the Shift "D"); the vehicle can be driven to the flat slab steadily and upright.
5.3.2.2 When the parking brake shafts of the vehicle are on the flat slab; operate the parking brake control device as per the requirements of 5.1.2.2; then measure the parking brake force value.
5.3.2.3 When the tested wheels are on the flat slab, maintain the vehicle stationary; measure the static wheel load of each wheels.
5.3.2.4 The parking brake ratio is the percentage between the sum of the measured parking force of each parking shafts and the sum of all shafts (static) loads.
5.4 Traction test methods
5.4.1 Facilities requirements
5.4.1.1 The measurement range of the traction parking tester shall generally be no less than 7000daN (or meet the requirements of the instrument instruction manual).
5.4.1.2 The test area shall be flat, hard and clean cement or asphalt pavement; the pavement adhesion coefficient shall be no less than 0.7.
5.4.1.3 The traction devices on the front and rear parts of the vehicle, and their fixings shall not b e damaged, failed, broken or deformed to affect the normal use.
5.4.2 Test methods
5.4.2.1 Drive the tested vehicle into the test area, use service brake to stop the vehicle steadily.
5.4.2.2 Place the transmission of the tested vehicle into natural; operate the parking brake control device as per the requirement of 5.1.2.2; then release the service brake control.
5.4.2.3 Use the traction parking tester to tow the tested vehicle in the positive and negative directions; the direction of the traction force shall be parallel to the ground and parallel to the vehicle longitudinal centerline.
5.4.2.4 The instrument shall increase the traction force smoothly and slowly, the maximum traction force applied to the vehicle shall be calculated as per Formula (1). […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB 7258Technical specifications for safety of power-driven vehicles operating on roads
- GB/T 13564Roller opposite forces type automobile brake tester
- GB 21861Items and methods of power-driven vehicles safety technology inspection
- GB/T 28529Platform brake testers
- GB/T 28948Commercial vehicle -- Front towing attachments
- GB 32087Towing devices for light-duty vehicle
Similar standards
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Related Standards
GB 21861-2014 — Items and methods of power-driven vehicles safety technology inspection
GB 32087-2015 — Towing devices for light-duty vehicle
GB 7258-2017 — Technical specifications for safety of power-driven vehicles operating on roads
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GB/T 35349-2017
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