The invention relates to a passenger car braking system matching design method, and belongs to the technical field of automobile braking. Comprising the following steps that S1, the design specification of a vehicle full-load front axle brake is determined according to whole vehicle parameter calculation; s2, the distribution ratio beta of the front brake and the rear brake is selected according to the design specification and capacity of the front axle brake; and S3, calculating and obtaining the design specification of the rear brake. And S4, calculating utilization adhesion coefficients of the front and rear brakes according to specifications of the front and rear brakes and parameters of the whole vehicle, and drawing a curve until the requirements of laws and regulations are met. And S5, calculating and drawing a road adhesion coefficient utilization rate. S6, according to the design specifications of the front brake and the rear brake, the diameter of a main cylinder hole is selected, and the maximum stroke of a piston is determined; meanwhile, the specification of the vacuum booster is calculated and determined, and the liquid amount of the oil can is determined; s7, the lever ratio of the brake pedal is determined, a brake pedal feeling curve is calculated and drawn, and whether the pedal feeling requirement is met or not is judged; and judging whether the requirements of the braking system are met.

本发明涉及一种乘用车制动系统匹配设计方法，属于汽车制动技术领域。包括以下步骤：S1：根据整车参数计算，确定车辆满载前轴制动器的设计规格；S2：根据前轴制动器的设计规格和能力，选取前后制动器的分配比β。S3：计算并得到后制动器的设计规格。S4：根据前后制动器的规格、整车参数计算得出前后制动器的利用附着系数并绘制曲线，直到符合法规要求。S5：计算并绘制出道路附着系数利用率。S6：根据前后制动器的设计规格，选择主缸缸孔直径并确定活塞的最大行程大小；同时计算确定真空助力器的规格大小，确定油壶的液量；S7：确定制动踏板杠杠比大小，计算并绘制制动踏板感曲线，判断是否满足踏板感要求；同时判断是否满足制动系统的要求。