JASO C402-1999 英文版 乘用车——行车制动器道路试验规程.pdf
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1、日本汽车标准_JASO C402-1999 英文版 乘用车行车制动器道路试验规程_JAPANESE AUTOMOBILE STANDARD JASO C402: 1999 Passenger cars - Service brake road test procedures 1. Scope This Standard specifies road test procedures for service brakes for passenger cars operated under normal conditions. This Standard does not apply to two-
2、wheeled vehicles. 2. Applicable Publications The following publications form a part of this Standard to the extent specified herein. The latest issue of all publications shall apply. JIS DO210 JASO C428 General Rules of Brake Test Method of Automobiles and Motorcycles Parking Brake Test Procedure 3.
3、 Definitions The definitions of main terms used in this Standard conform to 2 (Definition of Terms) of JIS DO210 and the following. a)lnitial Brake Temperature The value read within 15 seconds before the start of brake application. Where specified, the initial brake temperature shall be the highest
4、of the mean values for each wheel measured per axle. 4. Test Conditions 4. I Vehicle CI ass if i cat i on Test vehicles are classified by nominal maximum speed and conform to the provisions of JIS DO210 Category PI Over 140km/h Category P2 Category P3 9lkmlh to IlOkm/h Category P4 90kmlh and under 1
5、11 km/h to 140kmlh 4.2 Vehicle Condition Test vehicles shall conform to 4.1 (Condition of Vehicles) of JIS DO210 4.3 Condition of Brake Parts Each part of the braking device shall conform to 4.3 (Condition of Brake) of JIS D0210. 4.4 Conform to 4.2 (Road Surface and Weather Conditions) of JIS D0210.
6、 4.5 Temperature Measurement Brake temperature shall be measured as specified in 6 (Temperature Measurement) of JIS D0210. Road Surface and Weather Conditions 5. Test Procedures 5.1 Braking Operation a) Braking operation shall be performed with a continuous pedal force not exceeding 500N until the v
7、ehicle comes to a complete stop. b) In braking operations with constant braking deceleration, when the designated deceleration cannot be attained after pedal force reaches 500N, braking operation shall be performed with pedal force of 500N. c) Braking shall be initiated when the vehicle is at the ce
8、nter of a 3.5m wide lane, and the posture of the 5.2 Test Items and Sequence a) Preburnish check test vehicle shall be controlled so that no part of the vehicle leaves the lane. Initial braking speed Initial brake temperature Braking operation 50km/h or less 80C or less Braking deceleration of 3.0m/
9、s2 or less 1 JAS0 C402: 1999 Repetitions 10 or less Record Pedal force or line pressure, braking deceleration, and initial brake temperature Remarks: Proceed to the next test item only after this test is completed with test equipment, brakes and vehicle functioning normally throughout the test. b) F
10、irst effectiveness test Initial braking speeds 5Okm/h, 100km/h for PI and P2 vehicles 50km/h, 80kmlh for P3 vehicles 50km/h, 65km/h for P4 vehicles Transmission control position Neutral Initial brake temperature 80C Braking operation Repetitions Constant braking deceleration or constant pedal force
11、(line pressure) Braking applications shall start with the lowest braking deceleration or pedal force for each initial braking speed, and shall be repeated with increasing degrees until wheel lock occurs, the vehicle exceeds the lane boundaries or pedal force reaches 500N. Brake applications should b
12、e repeated at least 6 times at appropriate intervals. Record Pedal force or line pressure, braking deceleration, wheel lock condition, and deviation of vehicle from lane boundaries. Remarks: c) Burnish Initial braking speed should be applied sequentially from the lowest specified condition. Initial
13、braking speed 65km/h Transmission control position Braking operation Cooling speed 65kmlh Braking interval Normal driving position Braking deceleration of 3.5m/s2 1,500m or 120C of the initial brake temperature, whichever is attained earlier. reaches 120C even if the braking interval does not reach
14、1,500m. Pedal force or line pressure, and initial brake temperature (every first and 20th repetitions) Braking shall commence when the temperature Repetitions 200 Record d) Second effectiveness test 1) Low temperature effectiveness test Initial braking speed 50km/h Transmission con t ro I pos t ion
15、Neutra I Initial brake temperature 50C or less Braking operation Constant braking deceleration or constant pedal force (line pressure) Repetitions Braking shall start with the lowest braking deceleration or pedal force for each initial braking speed, and shall be repeated with increasing degrees unt
16、il wheel lock occurs, the vehicle exceeds the boundaries, or pedal force reaches 500N. Brake applications shall be repeated at least 3 times at appropriate intervals. Pedal force or line pressure, braking deceleration, and initial brake temperature Record Remarks: When the initial brake temperature
17、does not reach 50C, braking operation may be performed successively. 2) Normal temperature effectiveness test 50, 100, and 130km/h for PI vehicles 50, 80, and 100km/h for P2 vehicles Repetition of the first effectiveness test specified in b). The initial braking speeds, however, shall be as follows.
18、 2 JAS0 C402: 1999 50 and 80km/h for P3 vehicles 50 and 65km/h for P4 vehicles e) First reburnish Repetition of the burnish specified in c) Burnish, except that the number of brake applications shall be reduced to 35 and data shall be recorded for the first, loth, 25th and 35th repetitions. f) Light
19、 load effectiveness test Repetition of the first effectiveness test specified in b) First effectiveness test. (Not required for vehicles with a capacity of 2 persons or less.) 1) Base line check g) First fade and recovery test Initial braking speed Vmax O/-20 km/h Upper limit 100kmh Transmission con
20、trol position Neutral Initial brake temperature 80C Braking operation Record 2) Fade test Where, Vmax: the nominal maximum speed (km/h) Constant braking deceleration of 5.0m/s2 Pedal force or line pressure Repetitions 3 Initial brakina sDeed i/ (80% V,)* - (40% V,)2 Upper limit 100kmlh Where, 80%Vma
21、x: value (km/h) equal to nominal max. speed multiplied by 0.8 40%Vmax: value (kmlh) equal to nominal max. speed multiplied by 0.4 Normal driving gear 60C for initial application only Constant braking deceleration of 3.0m/s2 constant (See g of 6.1 .) Equal to initial braking speed Maximum level immed
22、iately following completion of braking Transmission control position Initial brake temperature Braking operation Cooling speed Accelerating condition Braking interval 640m Record Pedal force or line pressure, initial brake temperature, time required for fade test, and atmospheric temperature and win
23、d velocity at the beginning of fade test Repetitions 10 Remarks: The test shall continue uninterrupted from the initial to the final braking of the fade test. 3) High temperature effectiveness test Interval from preceding test Immediately after the fade test perform maximum acceleration test. Start
24、braking operation when the specified initial braking speed is attained. Same as in 1) Base line check Constant braking deceleration of 5.0m/s2 constant Pedal force or line pressure and initial brake temperature Initial braking speed Transmission control position Neutral Braking operation Record Inte
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