GB 4562-1984 Test method for braking performance of light motorcycles GB4562-1984 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of ChinawwW.bzxz.Net
Mopeds
Braklng performance test method
The brakelng performance test for mopedsThis standard specifies the brakelng performance test method for mopeds. 1 Test conditions
Should comply with the provisions of Chapter 2 of GB4559-84 "General Rules for Road Test of Mopeds". 2 Test method
2.1 The initial speed of the test vehicle is specified as 20±2km/h. If it is out of this range, the test needs to be repeated. UDC 629.118.6
.07 1620.1
GB4562—84
2.2 On the test road, divide it into three sections as shown below, and the auxiliary driving area should be of sufficient length. Electronic timing devices are set at both ends of the initial speed test section.
Auxiliary parking area
Initial speed test section
Braking distance high test section
2.3 The vehicle passes through the initial speed test section at the specified initial speed, and the time to pass through the section is measured. The actual initial speed is calculated according to formula (1).
Wherein, V———actual initial speed, km/h7.2
—Time to pass through the initial speed test section, S. 2.4 After the vehicle passes through the initial speed test section, emergency braking is applied until the vehicle stops. The distance from the center of the spray point to the vertical foot of the spray gun after the vehicle stops is measured as the measured braking distance. 2.5 Correct the measured braking distance according to formula (2): S.
Wherein: S——corrected braking distance, m Issued by the National Bureau of Standards on July 11, 1984
(2)
Implemented on May 1, 1985
S. —Actual braking distance, ml
V—Actual initial speed, km/h.
GB 4562—4
The corrected braking distance is the result of the vehicle braking test. 2.6 Calculate the arithmetic mean of the corrected values ​​of the round-trip braking distance, and take the minimum value of the average values ​​of more than two tests as the result of the vehicle braking performance test.
2.7 The test data and results are recorded in the table of Appendix B
3 (Supplement).
GB 4562—84
Appendix A
Added
(Supplement)
If a stopwatch is used for timing, the distance of the initial speed test interval is 50, and the actual initial speed is calculated as follows: A.1
Vg- 180
Where: V. ——Actual initial speed, km/hgt—Time to pass the initial speed test interval, s. When there is no brake printer in the test, the braking distance measurement method A.2
When the vehicle reaches the end of the initial speed test interval (based on the front wheel pressure line), emergency brake according to the hand flag to stop the vehicle. Measure the distance from the front wheel pressure point to the end of the initial speed test when the vehicle stops. This distance is the measured braking distance. Light motorcycle model
Frame number
Empty weight
Front wheel air pressure
Additional instructions:
Test area
Distance between
GB 4562—-84
Appendix B
Braking performance test record
(Supplement)
Test date
Test location
Occupant weight
Initial velocity
Passing zone
Interval time
Rear wheel pressure
Tester
Actual initial
Measured
Moving distance
Corrected
Braking
Rear braking distance average value
This standard is jointly proposed by the Ministry of Light Industry, the Ministry of Machinery Industry, the Ministry of Aviation Industry, the Ministry of Ordnance Industry and the Ministry of Posts and Telecommunications of the People's Republic of China. This standard is under the jurisdiction of Shanghai Bicycle Research Institute. This standard is drafted by the drafting group of "Technical Conditions and Road Tests for Light Motorcycles". The main drafters of this standard are Shi Chusheng, Li Guodong and Wang Houyuan.
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