公开(公告)号：US5171073A

公开(公告)日：1992-12-15

申请号：US608936

申请日：1990-11-05

申请人： Shohei Matsuda ,  Jiro Suzuki ,  Kazutoshi Tashima ,  Takeshi Kojima ,  Kohichi Furuya ,  Masaaki Myoi

发明人： Shohei Matsuda ,  Jiro Suzuki ,  Kazutoshi Tashima ,  Takeshi Kojima ,  Kohichi Furuya ,  Masaaki Myoi

IPC分类号： B60T8/34 ,  B60T8/40 ,  B60T8/42 ,  B60T8/48 ,  B60T8/94 ,  B60T13/18 ,  F16D48/02 ,  F16D48/04

CPC分类号： B60T8/4081 ,  B60T13/18 ,  B60T8/341 ,  B60T8/4225 ,  B60T8/489 ,  B60T8/94 ,  F16D25/14 ,  F16D48/02 ,  F16D48/04 ,  F16D2048/0209

摘要： A hydraulic pressure control system has a hydraulic pressure control valve which includes a spool slidably received in a housing for axial sliding movement between a rear position in which it permits the communication between an output port and a release port and a front position in which it permits communication between an input port and the output port. The hydraulic pressure control system also has a reaction chamber connected to the output port for providing a hydraulic pressure for biasing the spool rearwardly, and an input pressure working chamber for providing a hydraulic pressure for biasing the spool forwardly, a differential pressure regulating valve is interposed between the output port and the reaction chamber and adapted to be opened in response to the hydraulic pressure from the output port becoming higher than the hydraulic pressure in the reaction chamber by a predetermined value therefor. At an initial stage of the beginning of application of the hydraulic pressure to the input pressure working chamber, the application of the hydraulic pressure to the reaction chamber is cut off, so that the output hydraulic pressure from the output port can be rapidly increased with the spool kept located in the front position to provide a smooth initial operation of the hydraulically operated device connected to the output port.

公开(公告)号：US5197787A

公开(公告)日：1993-03-30

申请号：US721802

申请日：1991-06-26

申请人： Shohei Matsuda ,  Kazutoshi Tashima ,  Kohichi Furuya ,  Masaaki Myoi

发明人： Shohei Matsuda ,  Kazutoshi Tashima ,  Kohichi Furuya ,  Masaaki Myoi

IPC分类号： B60T8/32 ,  B60G17/04 ,  B60T8/34 ,  B60T8/40 ,  B60T17/02 ,  F15B1/02 ,  F15B1/033

CPC分类号： B60T8/4045 ,  B60T17/02 ,  F15B1/033 ,  Y10S303/04

摘要： A pressure supply system for a vehicle according to the invention incorporates a pump and an accumulator in which an output pressure of the pump is maintained within a prescribed range by controlling the on-off operation of the pump according to the inner pressure of the accumulator. By changing the prescribed range of pressure according to the actual pressure requirement, for instance according to the change in the travelling speed of the vehicle, the burden on the system is reduced. The prescribed range can be changed either by simply changing the upper and/or lower pressure limits at which the pump is deactivated and activated, respectively, or by operating the pump for a prescribed time period which is dependent on the pressure requirement after a certain reference pressure value is reached. Thus, the structure of the fluid pressure system is simplified, and the generation of unnecessary high pressure can be avoided.

公开(公告)号：US5306075A

公开(公告)日：1994-04-26

申请号：US779475

申请日：1991-10-18

申请人： Shohei Matsuda ,  Kazutoshi Tashima ,  Kohichi Furuya ,  Masaaki Myoi ,  Makoto Horiuchi

发明人： Shohei Matsuda ,  Kazutoshi Tashima ,  Kohichi Furuya ,  Masaaki Myoi ,  Makoto Horiuchi

IPC分类号： B60T8/46 ,  B60T8/40 ,  B60T8/42 ,  B60T8/44 ,  B60T8/48 ,  B60T8/94 ,  B60T17/18 ,  B60T13/18

CPC分类号： B60T8/4081 ,  B60T8/4072 ,  B60T8/4225 ,  B60T8/441 ,  B60T8/4863 ,  B60T8/94

摘要： In a hydraulic braking pressure control system comprising a brake device (B.sub.FL, B.sub.FR, B.sub.RL, B.sub.RR), hydraulic pressure controller (4) for controlling the hydraulic pressure supply source (2) in accordance with the amount of operation of an operating member (1), an auxiliary hydraulic pressure generator (3) including a working piston (16, 17) operatively connected to the operating member to advance in response to operation of the operating member and being slidably received in a housing (14) with a front surface of the working piston facing a hydraulic pressure chamber (18, 19), a hydraulic pressure transmitter (134) comprising a free piston (132) slidably received in a cylinder body (133) and having opposite ends facing an input hydraulic pressure chamber (130) connected to the hydraulic pressure controller and an output hydraulic pressure chamber (131) leading to the brake device, respectively, and an on-off valve (135) interposed between the hydraulic pressure chamber (18, 19) in the auxiliary hydraulic pressure generator (3) and the brake device and adapted to be closed in response to an increase in output hydraulic pressure from the hydraulic pressure controller, there is further included valve-opening device (136) for forcedly opening the on-off valve in response to the movement of the free piston by a predetermined distance or more in a direction to reduce the volume of the output hydraulic pressure chamber. This ensures that when an abnormality such as wear of a pad or a vapor lock is produced on the side of the brake device in a condition in which the hydraulic pressure supply source is normal, a deficiency of hydraulic pressure can be compensated for, and when a leak of fluid is produced, this can be detected promptly.

摘要翻译： 在包括制动装置（BFL，BFR，BRL，BRR）的液压制动压力控制系统中，根据操作构件（1）的操作量控制液压供给源（2）的液压控制器（4） ），辅助液压发生器（3），其包括可操作地连接到所述操作构件的工作活塞（16,17），以响应于所述操作构件的操作而前进，并且可滑动地容纳在壳体（14）中，所述壳体（14）的前表面 所述工作活塞面向液压室（18,19），液压变送器（134）包括可滑动地容纳在缸体（133）中并具有面向输入液压室（130）的相对端的自由活塞（132） 分别连接到液压控制器和通向制动装置的输出液压室（131），以及插入在所述液压压力室（18,19）之间的开闭阀（135） 锂离子液压发生器（3）和制动装置，并且响应于来自液压控制器的输出液压的增加而被关闭，还包括用于强制打开开关阀的阀开启装置（136） 响应于在减小输出液压室的容积的方向上的自由活塞的移动预定距离或更大的距离。 这样可以确保在液压供给源正常的状态下，在制动装置一侧产生诸如焊盘或蒸气锁的磨损等异常的情况下，能够补偿液压不足， 产生液体泄漏，可以及时检测。