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1. 发明授权

US5027599A Hydraulic braking system 失效
标题翻译：液压制动系统
公开(公告)号：US5027599A
公开(公告)日：1991-07-02
申请号：US259744
申请日：1988-10-19
申请人： Michiharu Nishii , Genji Mizuno , Ysohihiko Tada , Yoshihisa Nomura , Masahiko Kato , Kenji Shirai , Junichi Tanoue
发明人： Michiharu Nishii , Genji Mizuno , Ysohihiko Tada , Yoshihisa Nomura , Masahiko Kato , Kenji Shirai , Junichi Tanoue
IPC分类号： B60T8/44 , B60T8/94 , B60T13/14
CPC分类号： B60T8/94 , B60T13/146 , B60T8/441
摘要： A hydraulic braking system includes a tandem master cylinder having a bore with an opening and a closed wall at opposite ends thereof which formed in a housing, a first piston slidably fitted in the bore so as to define a first pressure chamber and a first fluid chamber therein and operatively connected to a brake pedal, a second piston slidably fitted in the bore so as to define a second fluid chamber adjacent to the first pressure chamber and a second pressure chamber and operatively connected to the first piston. A normally open valve communicates with each piston so as to close passages formed in the each pistons and communication between each fluid chambers and each pressure chambers, respectively, when each piston is moved in response to the depression of the brake pedal. A power source generates a hydraulic power pressure. A dynamic hydraulic braking pressure generator generates the hydraulic power pressure supplied from the power source in response to depression of the brake pedal and outputs to the second fluid chamber. A plurality of wheel cylinders for braking respective road wheels are divided into a first group of wheel brake cylinders communicated with the first pressure chamber through one of dual hydraulic circuits and a second group of wheel brake cylinders communicate with the second pressure chamber through an another of the dual hydraulic circuits. A restrictor restricts the sliding distance of the second piston toward the first piston to at least a predetermined distance for closing the valve means. Due to such construction, the first stage idle stroke of the tandem master cylinder is shortened and the stroke of the brake pedal is shortened.
摘要翻译：液压制动系统包括串联主缸，其具有开口的孔和形成在壳体中的相对端的封闭壁，第一活塞可滑动地装配在孔中，以便限定第一压力室和第一流体室其中并且可操作地连接到制动踏板，第二活塞可滑动地装配在所述孔中，以便限定与所述第一压力室相邻的第二流体室以及可操作地连接到所述第一活塞的第二压力室。当每个活塞响应于制动踏板的下压而移动时，常开阀与每个活塞相通，以分别闭合在每个活塞中形成的通道，并分别在每个流体室与每个压力室之间连通。电源产生液压动力压力。动态液压制动压力发生器响应于制动踏板的下压而产生从动力源供应的液压动力压力并将其输出到第二流体室。用于制动各个车轮的多个车轮缸被分成通过双重液压回路中的一个与第一压力室连通的第一组车轮制动缸，并且第二组车轮制动缸与第二压力室连通，双液压回路。限流器限制第二活塞朝向第一活塞的滑动距离至少一个预定的距离以关闭阀装置。由于这种结构，串联主缸的第一级怠速行程缩短，制动踏板的行程缩短。

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