汽车液压ABS压力梯度试验与影响因素分析

利用防抱死系统液压试验台, 采用PCMCIA-DAQ1200数据采集卡和LabVIEW软件, 编写了ABS压力梯度试验测试程序, 实现了全自动数据采样, 进行了包括普通制动、长加长减制动和阶梯制动等工况的ABS压力梯度试验测试。试验结果表明: 在普通制动时, 最大和最小减压梯度分别为-90.5-、94.8 MPa·s^-1, 最大和最小增压梯度分别为4.1、2.7 MPa·s^-1; 在长加长减制动时, 最大和最小减压梯度分别为-12.1-、23.0 MPa·s^-1, 最大和最小增压梯度分别为21.0、4.9 MPa·s^-1; 在阶梯制动时, 最大和最小减压梯度分别为-1.2-、3.2 MPa·s^-1, 最大和最小增压梯度分别为3.21、.2 MPa·s^-1; 普通制动、长加长减制动和阶梯制动的主缸压力分别达到8、121、5 MPa。

Pressure gradient experiment and influence factor analysis of automotive hydraulic ABS

Based on anti-1ock braking system(ABS) hydraulic test bench, PCMCIA-DAQ1200 acquisition card and LabVIEW software were used, the test program of ABS pressure gradient was written, and the data acquisition was realized automatically.The various experimental tests of ABS pressure gradient were carried out including common braking, long-plus and long-reduction braking and step braking.Test result shows that under common braking, the maximum and minimum decompression gradients are -90.5 and -94.8 MPa·s-1 respectively, and the maximum and minimum pressurization gradients are 4.1 and 2.7 MPa·s-1 respectively.Under long-plus and long-reduction braking, the maximum and minimum decompression gradients are -12.1 and -23.0 MPa·s-1 respectively, and the maximum and minimum pressurization gradients are 21.0 and 4.9 MPa·s-1 respectively.Under step braking, the maximum and minimum decompression gradients are -1.2 and -3.2 MPa·s-1 respectively, and the maximum and minimum pressurization gradients are 3.2 and 1.2 MPa·s-1.The main cylinder pressures of common braking, long-plus and long-reduction braking and step braking are 8, 12, 15 MPa respectively.