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GB 7258-1997《机动车运行安全技术条件》(以下简称新标准)中,对制动性能台架检测的标准作了较大的修改。为使汽车检测与维修适应新标准,有必要对有关问题进行探讨。 1 制动力平衡标准的对比对于制动力平衡的要求,新标准规定:在制动力增长全过程中,左右轮制动力差与该轴左右轮中制动力大者之比对前轴不得大于20％:对后轴不得大于24％。旧标准规定:前轴左右轮制动力差不大于该轴轴荷的5％,后轴左右轮制动力差不大于该轴轴荷的8％。用计算公式表示为
GB 7258-1997 “Motor vehicle operating safety conditions” (hereinafter referred to as the new standard), the brake performance bench test standards made major changes. In order to adapt the automobile testing and maintenance to the new standard, it is necessary to discuss the relevant issues. A comparison of braking force balance standards For the braking force balance requirements, the new standard states: In the whole process of braking force growth, left and right wheel brake force difference between the left and right wheels in the braking force on the front axle shall not exceed 20% : The rear axle shall not be greater than 24%. The old standard stipulates that the left and right wheel brake force difference of the front axle is not more than 5% of the shaft axle load, and the left and right wheel brake force difference of the rear axle is not more than 8% of the axle axle load. Calculated as the formula