公开(公告)号：US4500138A

公开(公告)日：1985-02-19

申请号：US492423

申请日：1983-05-06

申请人： Mitutoyo Mizusawa ,  Masao Fujisawa

发明人： Mitutoyo Mizusawa ,  Masao Fujisawa

IPC分类号： B60T8/26 ,  B60T8/42 ,  B60T13/14 ,  B60T8/02

CPC分类号： B60T13/14 ,  B60T8/266 ,  B60T8/4225 ,  B60T8/4233

摘要： In a brake oil pressure controlling valve device for vehicles of the type wherein a reducing valve adapted to proportionally reduce output oil pressure from a master cylinder to transmit it to a rear wheel brake and a pressure adjusting spring for urging the reducing valve in the valve opening direction and determining the reduction starting pressure thereof, are interposed in an oil path connecting between an output port of the master cylinder and the rear wheel brake, the disclosed valve device is further provided with: a pressure reducing piston which is normally held by virtue of resilient force of a set spring at its advanced limit position where the reducing valve is made open and which is retreated to close the reducing valve and to reduce oil pressure on the output side of the reducing valve when the resilient force of the set spring is released; a controlling oil pressure chamber supplied with oil pressure from an oil pressure source when a rear wheel is about to come into a locked state; and a controlling piston operable with oil pressure within the controlling oil pressure chamber so as to release the resilient force of the set spring from the pressure reducing piston.

摘要翻译： 一种用于这种类型的车辆的制动油压力控制阀装置，其中减速阀适于成比例地减小主缸的输出油压以将其传送到后轮制动器，以及压力调节弹簧，用于推动阀开启中的减压阀 方向并确定其降低起始压力，被插入连接在主缸的输出端口和后轮制动器之间的油路中，所公开的阀装置还设置有：减压活塞，其通常由于 设定弹簧的弹性力在减速阀打开的前进极限位置处，并且当弹簧的弹力被释放时，其被退回以关闭减压阀并减小减压阀输出侧的油压 ; 当后轮即将进入锁定状态时，从油压源供给油压的控制油压室; 以及控制活塞，其可在所述控制油压室内以油压操作，以便从所述减压活塞释放所述固定弹簧的弹力。

公开(公告)号：US4458953A

公开(公告)日：1984-07-10

申请号：US367172

申请日：1982-04-12

申请人： Mitutoyo Mizusawa ,  Koichi Miyasaka

发明人： Mitutoyo Mizusawa ,  Koichi Miyasaka

IPC分类号： B60T8/26 ,  B60T11/34

CPC分类号： B60T11/34 ,  B60T8/26

摘要： An improved hydraulic braking pressure control device for a dual braking system including a pair of first and second hydraulic lines extending from a dual type brake master cylinder to the front and rear wheel brakes. The device includes a common housing mounted across the first and second hydraulic lines, and a pair of differential pistons slidably received in the aligned cylinder bores in the housing to respectively define on their opposite sides a first input and a first output hydraulic chamber and a second input and a second output hydraulic chamber, the adjacent input and output chambers being in communication with each other through respective valves which are operated to open and close by a pair of valve actuating pistons slidably fitted in the respective input chambers. A pressure control spring is arranged between the differential pistons to urge them in the direction away from each other. The valve actuating pistons are each operatively connected with the valves through a pair of connector assemblies with a predetermined amount of free displacement distance formed therebetween so as to allow free movements of the differential pistons within a definite range.

摘要翻译： 一种用于双制动系统的改进的液压制动压力控制装置，包括从双型制动主缸延伸到前轮和后轮制动器的一对第一和第二液压管线。 该装置包括跨过第一和第二液压管线安装的公共壳体，以及可滑动地容纳在壳体中对齐的气缸孔中的一对差动活塞，以在其相对侧上分别限定第一输入和第一输出液压室，第二输出液压室 输入和第二输出液压室，相邻的输入和输出室通过相应的阀彼此连通，各个阀通过可滑动地装配在各个输入室中的一对阀致动活塞来操作以打开和关闭。 压力控制弹簧设置在差动活塞之间，以便在远离彼此的方向上推动它们。 阀致动活塞各自通过一对连接器组件与阀操作连接，其间形成有预定量的自由位移距离，以允许差动活塞自由运动在一定范围内。

公开(公告)号：US4642990A

公开(公告)日：1987-02-17

申请号：US680624

申请日：1984-12-11

申请人： Mitutoyo Mizusawa ,  Makoto Horiuchi

发明人： Mitutoyo Mizusawa ,  Makoto Horiuchi

IPC分类号： B60T13/14 ,  B60T13/20

CPC分类号： B60T13/145

摘要： In the assembly of a master cylinder and an oil-hydraulic booster connected to the rear thereof, the master cylinder has an axial bore consisting of a forward, small-diameter bore section and a rearward, large-diameter bore section and the master cylinder piston in the master cylinder includes a small-diameter section slidably fitted in the small-diameter bore section of the master cylinder and a large-diameter section slidably fitted in the large-diameter bore section thereof. The forward end portion of the piston in the oil-hydraulic booster is formed smaller in diameter than the large-diameter bore section of the maste cylinder and is arranged proximate the large-diameter section of the master cylinder piston in the master cylinder so as to enter the large-diameter bore section of the master cylinder when the booster piston is advanced. Provided for the booster piston slidably fitted in the oil-hydraulic booster cylinder is a first stop means arranged to define the limit of retraction of the booster input rod in such a manner that, in the process of retraction of the latter, the opening of an output valve arranged to control communication between the output hydraulic pressure chamber of the booster and the oil reservoir tank reaches its maximum as the booster piston reaches its limit of retraction. A second stop means is provided on the booster cylinder to define the retraction limit of the input rod so that the opening of the output valve is minimized with the booster piston reaching its limit of retraction.

摘要翻译： 在连接到其后部的主缸和油压助力器的组装中，主缸具有轴向孔，其包括前向小直径孔部分和后向大直径孔部分以及主缸活塞 在主缸中包括可滑动地装配在主缸的小直径孔部分中的小直径部分和可滑动地装配在其大直径孔部分中的大直径部分。 油压助力器中的活塞的前端部的直径比直径比直径小于缸体的大直径孔部的直径小，并且配置在主缸的主缸活塞的大径部附近， 当增压活塞前进时，进入主缸的大口径孔段。 提供可滑动地装配在油压助力器缸中的增压活塞是第一止动装置，其被设置为以增加的输入杆的缩回限定的方式限定增压器输入杆的缩回极限，使得在后退的过程中， 输出阀，用于控制助力器的输出液压室与储油箱之间的连通，当增压器活塞达到其回缩极限时，其达到最大值。 在助力缸上设置有第二止动装置，以限定输入杆的回缩极限，使得增压器活塞达到其回缩限制时，输出阀的开度最小化。

公开(公告)号：US4548445A

公开(公告)日：1985-10-22

申请号：US524216

申请日：1983-08-18

申请人： Mitutoyo Mizusawa ,  Masao Fujisawa

发明人： Mitutoyo Mizusawa ,  Masao Fujisawa

IPC分类号： B60T8/18 ,  B60T8/30 ,  B60T11/34 ,  B60T8/22

CPC分类号： B60T11/34 ,  B60T8/1843 ,  B60T8/306

摘要： Disclosed is an improved device for controlling hydraulic pressure for braking a vehicle of the type including a pressure reducing valve disposed midway of an oil passage extending between an output port of a master cylinder and a rear wheel brake, said pressure reducing valve being adapted to proportionally reduce hydraulic pressure from the output port and then transmit reduced hydraulic pressure to the rear wheel brake. The improvement consists in that a pneumatic spring incorporated in a suspension system for determining hydraulic pressure at which the pressure reducing valve initiates pressure reducing function in dependence on the weight of cargoes loaded on the vehicle is operatively connected to a valve body of the pressure reducing valve in such a manner as to bias the valve body in the valve opening direction. Further, a mechanical spring is arranged for determining hydraulic pressure at which the pressure reducing valve initiates its pressure reducing function in the event that the pneumatic spring is in trouble. Alternatively, two pneumatic springs may be provided in such a manner that intended pressure reducing function can be assured by means of one of them when the other one fails to function properly.

摘要翻译： 公开了一种改进的用于制动液压的制动装置，该装置包括在主缸的输出端口和后轮制动器之间延伸的油路的中间设置的减压阀，所述减压阀适于成比例地 减少输出口的液压压力，然后将液压传递到后轮制动器。 改进之处在于，结合在悬架系统中的气动弹簧用于确定减压阀根据装载在车辆上的货物的重量启动减压功能的液压，可操作地连接到减压阀的阀体 以使得阀体在阀打开方向上偏置的方式。 此外，机械弹簧布置成用于确定在气动弹簧故障的情况下减压阀启动其减压功能的液压。 或者，可以以这样的方式提供两个气动弹簧，即当另一个不能正常工作时，可以通过其中一个确保预期的减压功能。

公开(公告)号：US4261623A

公开(公告)日：1981-04-14

申请号：US128117

申请日：1980-03-07

申请人： Mitutoyo Mizusawa

发明人： Mitutoyo Mizusawa

IPC分类号： B60T8/28 ,  B60T11/34 ,  B60T13/06

CPC分类号： B60T8/282 ,  B60T11/34

摘要： A brake oil-pressure control valve device for vehicles in which operating oil pressure of rear wheel brakes is automatically controlled in accordance with the braking force as required. The device comprises first and second branch oil passages branched from an oil passage connected to a rear wheel brake output port of a master cylinder, a reducing valve interposed between the first branch oil passage and the rear wheel brakes, springs for determining pressure to start reducing action of the reducing valve, a control piston disposed in an oil pressure chamber communicated with the second branch oil passage to normally hold the reducing valve in its open position, and a weight valve disposed within the valve chamber to sense deceleration of the vehicle.

摘要翻译： 一种用于车辆的制动油压控制阀装置，其中根据需要根据制动力自动控制后轮制动器的工作油压。 该装置包括从连接到主缸的后轮制动器输出端口的油路分支的第一和第二分支油路，设置在第一分支油路和后轮制动器之间的减压阀，用于确定开始减小的压力的弹簧 所述减压阀的动作，设置在与所述第二分支油路连通的油压室中以将所述减压阀正常保持在其打开位置的控制活塞，以及配置在所述阀室内的重量阀，以检测所述车辆的减速度。

公开(公告)号：US4773223A

公开(公告)日：1988-09-27

申请号：US892648

申请日：1986-08-04

申请人： Mitutoyo Mizusawa ,  Makoto Horiuchi

发明人： Mitutoyo Mizusawa ,  Makoto Horiuchi

IPC分类号： B60T13/14 ,  B60T13/20

CPC分类号： B60T13/145

摘要： In the assembly of a master cylinder and an oil-hydraulic booster connected to the rear thereof, the master cylinder has an axial bore consisting of a forward, small-diameter bore section and a rearward, large-diameter bore section and the master cylinder piston in the master cylinder includes a small-diameter section slidably fitted in the small-diameter bore section of the master cylinder and a large-diameter section slidably fitted in the large-diameter bore section thereof. The forward end portion of the piston in the oil-hydraulic booster is formed smaller in diameter than the large-diameter bore section of the master cylinder and is arranged proximate the large-diameter section of the master cylinder piston in the master cylinder so as to enter the large-diameter bore section of the master cylinder when the booster piston is advanced. Provided for the booster piston slidably fitted in the oil-hydraulic booster cylinder is a first stop means arranged to define the limit of retraction of the booster input rod in such a manner that, in the process of retraction of the latter, the opening of an output valve arranged to control communication between the output hydraulic pressure chamber of the booster and the oil reservoir tank reaches its maximum as the booster piston reaches its limit of retraction. A second stop means is provided on the booster cylinder to define the retraction limit of the input rod so that the opening of the output valve is minimized with the booster piston reaching its limit of retraction.

摘要翻译： 在连接到其后部的主缸和油压助力器的组装中，主缸具有轴向孔，其包括前向小直径孔部分和后向大直径孔部分以及主缸活塞 在主缸中包括可滑动地装配在主缸的小直径孔部分中的小直径部分和可滑动地装配在其大直径孔部分中的大直径部分。 油压助力器中的活塞的前端部的形状比主缸的大直径孔部的直径小，并且配置在主缸的主缸活塞的大径部附近， 当增压活塞前进时，进入主缸的大口径孔段。 提供可滑动地装配在油压助力器缸中的增压活塞是第一止动装置，其被设置为以增加的输入杆的缩回限定的方式限定增压器输入杆的缩回极限，使得在后退的过程中， 输出阀，用于控制助力器的输出液压室与储油箱之间的连通，当增压器活塞达到其回缩极限时，其达到最大值。 在助力缸上设置有第二止动装置，以限定输入杆的回缩极限，使得增压器活塞达到其回缩限制时，输出阀的开度最小化。

公开(公告)号：US4346941A

公开(公告)日：1982-08-31

申请号：US181845

申请日：1980-08-27

申请人： Mitutoyo Mizusawa

发明人： Mitutoyo Mizusawa

IPC分类号： B60T8/26 ,  B60T11/34

CPC分类号： B60T8/265 ,  B60T11/34

摘要： An improved hydraulic pressure control valve device includes a valve housing having first and second inlet ports of the master cylinder, respectively, first and second inlet ports communicated with the left and right rear wheel brakes of the vehicle, respectively, a first control pressure chamber interconnecting the first inlet port and the first outlet port, a second control pressure chamber interconnecting the second inlet port and the second outlet port, and a cylinder bore interconnecting the first and the second outlet ports; a pressure reducing valve adapted to normally open the first control pressure chamber and to open and close the first control pressure chamber as the pressure at the first inlet port exceeds a predetermined level so as to transmit the pressure to the first outlet port while proportionally reducing the pressure; a cut-off valve adapted to normally open the second control pressure chamber in the normal state, a valve rod integrally connected to the reducing valve to operate the cut-off valve so that is closes the second control pressure chamber just before the closing of the pressure reducing valve; and a balance piston slidably fitting in the cylinder bore and adapted to move, when the pressure at the first outlet port is higher than that at the second outlet port, in the direction for achieving an equilibrium of these pressures.

摘要翻译： 改进的液压控制阀装置包括分别具有主缸的第一和第二入口的阀壳体，分别与车辆的左后轮和右后轮制动器连通的第一和第二入口端口，第一控制压力室互连 第一入口端口和第一出口端口，互连第二入口端口和第二出口端口的第二控制压力室和互连第一和第二出口端口的气缸孔; 适于在第一入口处的压力超过预定水平时，通常打开第一控制压力室并打开和关闭第一控制压力室的减压阀，以便将压力传递到第一出口端口，同时成比例地减小 压力; 适于在正常状态下正常打开第二控制压力室的截止阀，与减压阀一体连接的阀杆，以操作截止阀，从而在紧闭关闭阀之前关闭第二控制压力室 减压阀; 以及平衡活塞，其可滑动地装配在所述气缸孔中，并且当所述第一出口处的压力高于所述第二出口处的压力时，沿着实现所述压力平衡的方向移动。