公开(公告)号：WO1995021759A1

公开(公告)日：1995-08-17

申请号：PCT/US1995001769

申请日：1995-02-13

Applicant: EUCLID-HITACHI HEAVY EQUIPMENT INC.

Inventor： EUCLID-HITACHI HEAVY EQUIPMENT INC. ,  SCHANTZ, Ronald ,  GATES, Eric

IPC: B60T13/68

CPC classification number: G01P3/488 ,  B60T8/329 ,  B60T8/4818 ,  B60T8/4845 ,  B60T13/585 ,  B60T15/04 ,  G01P1/00

Abstract: A brake system for a vehicle having a traction control or anti-spin function for controlling wheel spin on differentially driven wheels. The system includes left and right fluid pressure operated brake mechanisms (22, 24) associated with left and right driven wheels (14, 16) of the vehicle. First and second brake valves (80, 82) control fluid pressure to the left and right brake mechanisms (22, 24). In normal operation, an operator actuable treadle (54) operates both valves (80, 82) to apply fluid pressure to the brake mechanisms (22, 24) as a function of treadle depression. Each brake valve (80, 82) includes a pilot pressure operated section (80b, 82b) for actuating a main fluid control section (80a, 82a). Wheel speed sensors (300) monitor rotational speeds of associated left and right driven wheels (14, 16). When slip is detected, a control unit (40) activates one of two pulse width modulated valves (140, 142) to produce pilot pressure in a pilot pressure chamber (130, 132) of the brake valve associated with the spinning wheel.

Abstract translation: 一种用于车辆的制动系统，其具有用于控制在差动驱动轮上的车轮旋转的牵引力控制或防旋转功能。 该系统包括与车辆的左和右驱动轮（14,16）相关联的左右流体压力操纵的制动机构（22,24）。 第一和第二制动阀（80,82）控制左右制动机构（22,24）的流体压力。 在正常操作中，操作者可起动踏板（54）操作两个阀（80,82），以作为踏板凹陷的函数向制动机构（22,24）施加流体压力。 每个制动阀（80,82）包括用于致动主流体控制部分（80a，82a）的先导压力操作部分（80b，82b）。 车轮速度传感器（300）监测相关联的左右驱动轮（14,16）的转速。 当检测到滑动时，控制单元（40）激活两个脉冲宽度调制阀（140,142）中的一个，以在与旋转轮相关联的制动阀的先导压力室（130,132）中产生先导压力。