公开(公告)号：US3975060A

公开(公告)日：1976-08-17

申请号：US577787

申请日：1975-05-14

申请人： Itaru Hirayama

发明人： Itaru Hirayama

IPC分类号： B60T8/26 ,  B60T17/22

CPC分类号： B60T8/26 ,  B60T17/226

摘要： In a brake system including two independent hydraulic lines extending from a dual type brake master cylinder and connected to the respective rear wheel brakes, a novel pressure control device provided for automatically adjusting the ratio of the front to the rear wheel brake pressure for maximized overall braking efficiency and including failure alarm for warning the driver of any trouble in operation of the device or of any fluid leakage on the hydraulic lines without delay. The device includes a cylinder bore fitted with a pair of annular pistons and a balance piston extending axially therethrough. A pair of sealing rings are mounted on the balance piston at the opposite ends thereof to define each an input and an output hydraulic chamber, respectively connected with the upstream and downstream portions of the associated one of the two hydraulic lines and adapted to be placed in communication with each other with displacement of the balance piston from its neutral position. A pair of control valves are arranged each between the adjacent input and output hydraulic chambers and operable normally to reduce the fluid pressure in the output chamber relative to that in the input chamber at a predetermined ratio. The balance piston when moved in either direction from its neutral position actuates a switch unit inserted in an electrical alarm circuit.

摘要翻译： 在包括从双型制动主缸延伸并连接到相应的后轮制动器的两个独立液压管线的制动系统中，提供了一种新颖的压力控制装置，用于自动调节前轮与后轮制动器压力的比率，以实现最大化的整体制动 效率，包括故障警报，警告驾驶员在操作设备时任何故障或液压管路上任何液体泄漏无延迟。 该装置包括装配有一对环形活塞的气缸孔和轴向延伸穿过其中的平衡活塞。 一对密封环安装在平衡活塞的相对两端，以限定每个输入和输出液压室，分别与两个液压管路中的一个液压管路的上游部分和下游部分连接，并适于放置在 通过平衡活塞从其中立位置的位移而彼此连通。 一对控制阀布置在相邻的输入和输出液压室之间，并且可操作地正常地以预定的比例减小输出室中的流体压力相对于输入室中的流体压力。 平衡活塞从其中性位置向任一方向移动时，启动插入电气报警电路中的开关单元。

公开(公告)号：US4168613A

公开(公告)日：1979-09-25

申请号：US930854

申请日：1978-08-03

申请人： Tadao Nakagawa ,  Itaru Hirayama ,  Hiroo Takeuchi

发明人： Tadao Nakagawa ,  Itaru Hirayama ,  Hiroo Takeuchi

IPC分类号： B60T11/22 ,  B60T17/22 ,  G01F23/74 ,  B60T11/20

CPC分类号： G01F23/74 ,  B60T11/22 ,  B60T17/225 ,  Y10T137/86228

摘要： A device comprising two oil reservoir tanks communicating with the two respective oil-hydraulic chambers of a tandem type master cylinder and also with each other through an upper and a lower interconnecting oil passage. One of the two tanks has a top opening for oil filling use and normally closed with a vented cap while the other tank is closed at the top and provided therein with an oil level detector means which comprises a stationary reed switch connected with an appropriate external alarm circuit and a permanent magnet vertically movable with the oil level in the tank to close the reed switch as the volume of oil stored is reduced to a predetermined minimum. With the device, even if one of the two oil-hydraulic lines connected with the master cylinder fails to function due to oil leakage, the other line can properly function without any pressure failure as, in the associated tank, a predetermined minimum volume of oil remains on account of the height of the lower oil passage.

摘要翻译： 一种装置，包括两个储油箱，其与串联型主缸的两个相应的油压室连通，并且还通过上部和下部互连油通道相互连接。 两个罐中的一个具有用于充油使用的顶部开口，并且通常用封闭的通风盖，而另一个罐在顶部封闭并且在其中设置油位检测器装置，其包括与适当的外部警报器连接的静止簧片开关 电路和永磁体，其随着油箱中的油位垂直移动，以随着储存的油的体积减少到预定的最小值而闭合舌簧开关。 使用该装置，即使与主缸连接的两个油压管路中的一个由于漏油而不能起作用，另一个管线可以正常工作而没有任何压力故障，因为在相关联的罐中，具有预定的最小体积的油 仍然是因为较低油路的高度。