公开(公告)号：US5052182A

公开(公告)日：1991-10-01

申请号：US282567

申请日：1988-12-12

申请人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

发明人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

IPC分类号： B60T13/12 ,  B60T13/14

CPC分类号： B60T13/145

摘要： A tandem master brake cylinder has first and second pistons, each piston associated with a fluid chamber and a pressure chamber. The pistons are displaced in response to actuation of a brake pedal. A hydraulic booster is coupled to a power source and is operable to enhance the piston movement and for conducting pressurized fluid to a second of the fluid chambers associated with a second piston to displace that piston in a manner reducing the volume of the pressure chamber associated with the first piston. In the event that a negative pressure is communicated with the second fluid chamber, e.g. by a loss of pressurized fluid from the power source, brake fluid is supplied through a one-way check valve to the second fluid chamber to prevent the negative pressure from reversing the motion of the second piston.

摘要翻译： 串联主制动缸具有第一和第二活塞，每个活塞与流体室和压力室相关联。 响应于制动踏板的致动，活塞被移动。 液压助力器联接到动力源并且可操作以增强活塞运动并将加压流体传导到与第二活塞相关联的第二个流体室，以便以减小与压力室相关联的压力室的体积的方式移动该活塞 第一个活塞。 在负压与第二流体室连通的情况下，例如， 通过来自动力源的加压流体的损失，制动流体通过单向止回阀供给到第二流体室，以防止负压反转第二活塞的运动。

公开(公告)号：US4986613A

公开(公告)日：1991-01-22

申请号：US386274

申请日：1989-07-28

申请人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

发明人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

IPC分类号： B60T13/12 ,  B60T8/44 ,  B60T13/14

CPC分类号： B60T13/146 ,  B60T8/441

摘要： A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a hydraulic booster for actuating the master cylinder in response to depression of a brake pedal and a plurality of wheel brake cylinders for braking respective road wheels, which are divided into a first group of wheel brake cylinders communicating with the master cylinder and a second group of wheel brake cylinders communicating with the hydraulic booster. An auxiliary cylinder is disposed between the master cylinder and the first group of wheel brake cylinders to which a hydraulic braking pressure from the master cylinder is directly applied in its inoperative condition, and it increases the hydraulic braking pressure in response to depression of the brake pedal in its operative condition which is made when the hydraulic power pressure, for example, is less than the hydraulic braking pressure by a predetermined difference. Control structure is connected to the auxiliary cylinder and allows the auxiliary cylinder in its operative condition when the hydraulic braking pressure, for example, is less than a predetermined value.

公开(公告)号：US4887869A

公开(公告)日：1989-12-19

申请号：US259775

申请日：1988-10-19

申请人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

发明人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

IPC分类号： B60T8/1761 ,  B60T8/44 ,  B60T8/94 ,  B60T13/12 ,  B60T13/14

CPC分类号： B60T8/44 ,  B60T13/146 ,  B60T8/446 ,  B60T8/94

摘要： A pair of spaced apart large-diameter and small-diameter lands between which a fluid chamber is defined are formed on a second piston in a tandem cylinder to which an anti-skid device is added. Booster pressure is applied to the fluid chamber to act on the large-diameter land in a manner fluidly locking the second piston against movement despite a reduction in pressure in the first and second pressure chambers during operation of the anti-skid device. As a result, the movement of the brake pedal in the normal direction of depression is prevented when the anti-skid devices operates.

摘要翻译： 一对间隔开的大直径和小直径的平台，其间限定有流体室，在串联气缸中的第二活塞上形成有防滑装置。 尽管在防滑装置的操作期间第一压力室和第二压力室中的压力降低，加压压力被施加到流体室以以流体地锁定第二活塞的方式作用在大直径区域上。 结果，当防滑装置工作时，防止制动踏板在正常方向的运动。

公开(公告)号：US4848853A

公开(公告)日：1989-07-18

申请号：US259743

申请日：1988-10-19

申请人： Genji Mizuno ,  Michiharu Nishii ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

发明人： Genji Mizuno ,  Michiharu Nishii ,  Yoshihiko Tada ,  Yoshihisa Nomura ,  Masahiko Kato ,  Kenji Shirai ,  Junichi Tanoue

IPC分类号： B60T8/44 ,  B60T8/48 ,  B60T8/94 ,  B60T13/14

CPC分类号： B60T8/94 ,  B60T13/146 ,  B60T8/445 ,  B60T8/4836

摘要： A hydraulic brake system includes a master cylinder for generating a brake fluid pressure in response to a brake pedal, a power fluid source for generating a power fluid pressure by increasing a brake fluid to a predetermined pressure. A dynamic fluid pressure control apparatus supplies the brake fluid pressure to regulate the power fluid pressure from the power fluid pressure source in response to the brake pedal. A plurality of wheel cylinders of each wheel for the vehicle are fluidically communicated with a dynamic fluid pressure control apparatus and the master cylinder via a fluid passage separated into plural control systems. A first changeover valve fluidically and selectively communicates at least one system of the wheel cylinder with one of the dynamic fluid pressure control apparatus and the master cylinder and a control valve disposed in a fluid passage communicates the first changeover valve and the wheel cylinder controls the brake fluid pressure supplied to the wheel cylinder by opening and closing the fluid passage in accordance with the slip state of the wheel upon braking. A control circuit controls the actuation of the control valve and the first changeover valve, and a second changeover valve is disposed in a fluid passage fluidically communicating the first changeover valve and the dynamic fluid pressure control apparatus and selectively communicates the fluid passage with one of the dynamic fluid pressure control apparatus and the power fluid pressure source.

摘要翻译： 液压制动系统包括用于响应于制动踏板产生制动液压力的主缸，用于通过将制动液增加到预定压力来产生动力流体压力的动力流体源。 动态流体压力控制装置响应于制动踏板供应制动液压力以调节来自动力流体压力源的动力流体压力。 用于车辆的每个车轮的多个车轮缸通过分离成多个控制系统的流体通道与动态流体压力控制装置和主缸流体连通。 第一切换阀流动地且选择性地将轮缸的至少一个系统与动态流体压力控制装置和主缸中的一个连通，并且设置在流体通道中的控制阀连通第一转换阀，并且轮缸控制制动器 通过在制动时根据车轮的滑动状态打开和关闭流体通道，向液压缸提供流体压力。 控制电路控制控制阀和第一转换阀的致动，并且第二转换阀设置在与第一转换阀和动态流体压力控制装置流体连通的流体通道中，并且将流体通道与 动态流体压力控制装置和动力流体压力源。

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。

公开(公告)号：US5024492A

公开(公告)日：1991-06-18

申请号：US386250

申请日：1989-07-28

申请人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihisa Nomura ,  Masahiko Kato

发明人： Michiharu Nishii ,  Genji Mizuno ,  Yoshihisa Nomura ,  Masahiko Kato

IPC分类号： B60T13/12 ,  B60T8/44 ,  B60T8/48 ,  B60T11/18 ,  B60T13/14

CPC分类号： B60T8/445 ,  B60T11/18 ,  B60T13/146 ,  B60T8/4836

摘要： A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a hydraulic booster for actuating the master cylinder in response to depression of a brake pedal and a plurality of wheel brake cylinders for braking respective road wheels, which are divided into a first group of wheel brake cylinders communicating with the master cylinder and a second group of wheel brake cylinders communicating with the hydraulic booster. An auxiliary cylinder is disposed between the hydraulic booster and the second group of wheel brake cylinders. The auxiliary cylinder includes a cylinder body having a cylinder bore defined therein and a piston axially slidably disposed within the cylinder bore. The piston forms within the cylinder bore a first chamber and a second chamber, and blocks a fluid communication therebetween. The first chamber communicates with the hydraulic booster and the second chamber communicates with the second group of wheel brake cylinders to which a braking force is applied in response to operation of the hydraulic booster. Thereby, the brake fluid filled in the hydraulic booster is prevented from flowing out, even if leakage of the brake fluid occurs in the second group of wheel brake cylinders.

公开(公告)号：US5065573A

公开(公告)日：1991-11-19

申请号：US552896

申请日：1990-07-16

申请人： Yoshihisa Nomura ,  Masahiko Kato ,  Michiharu Nishii

发明人： Yoshihisa Nomura ,  Masahiko Kato ,  Michiharu Nishii

IPC分类号： B60T13/12 ,  B60T8/44 ,  B60T8/48 ,  B60T8/94 ,  B60T13/14

CPC分类号： B60T8/441 ,  B60T13/143 ,  B60T13/145 ,  B60T8/445 ,  B60T8/4836 ,  B60T8/94

摘要： A hydraulic power booster having a lever device disposed in operative association with a reaction piston, a power piston and a valve spool, for moving the valve spool in one of opposite axial directions thereof for applying a pressure of a pressure source into a power chamber to advance the power piston, in response to a relative movement between the reaction and power pistons. The booster is provided with a backup actuator including a cylinder, and a valve drive piston which slidably engages the cylinder. The cylinder and the valve drive piston cooperate with each other to define a first fluid chamber communicating with the power chamber, and a second fluid chamber communicating with a pressure chamber in which a pressure is generated according to an advancing force of the power piston. The valve drive piston moves the valve spool in the above-indicated one axial direction, in engagement with the valve spool, when the valve drive piston is moved in a direction from the second fluid chamber toward the first fluid chamber.

摘要翻译： 一种液压动力助力器，其具有设置成与反作用活塞，动力活塞和阀芯操作关联的杠杆装置，用于在一个相反轴向方向上移动阀芯，以将压力源的压力施加到动力室中， 响应于反应和动力活塞之间的相对运动，推进动力活塞。 升压器设置有备用致动器，其包括气缸和可滑动地接合气缸的气门驱动活塞。 气缸和阀驱动活塞彼此配合以限定与动力室连通的第一流体室，以及与根据动力活塞的推进力产生压力的压力室连通的第二流体室。 当阀驱动活塞沿着从第二流体室朝向第一流体室的方向移动时，阀驱动活塞将阀芯沿着上述一个轴向移动，与阀芯接合。

公开(公告)号：US5054860A

公开(公告)日：1991-10-08

申请号：US474333

申请日：1990-02-02

申请人： Yoshihisa Nomura ,  Masahiko Kato ,  Michiharu Nishii

发明人： Yoshihisa Nomura ,  Masahiko Kato ,  Michiharu Nishii

IPC分类号： B60T8/44 ,  B60T8/88 ,  B60T8/94 ,  B60T13/12 ,  B60T17/22

CPC分类号： B60T17/226 ,  B60T8/445 ,  B60T8/885 ,  B60T8/94

摘要： A hydraulic braking system for an automotive vehicle is provided with a power source for generating a hydraulic power pressure, a master cylinder, a hydraulic booster for introducing the hydraulic power pressure and actuating the master cylinder in response to operation of a brake operating member, a wheel brake cylinder for braking a road wheel, a changeover valve, and anti-skid control device for actuating the changeover valve into a position where the wheel brake cylinder is communicated with the booster and regulating the hydraulic pressure in the wheel brake cylinder on the basis of the hydraulic power pressure in the booster when the road wheel is in a slip condition. The hydraulic braking system includes a failure detecting feature for producing a power pressure failure signal when the hydraulic power pressure in the booster is lower than the master cylinder pressure by at least a predetermined value, an anti-skid prohibiting device for prohibiting the anti-skid control operation in accordance with the failure signal, and a detection preventing feature for preventing the failure detecting features from producing the failure signal when the hydraulic power pressure in the booster exceeds a predetermined pressure which is lower than a limit pressure for boosting operation of the booster.

摘要翻译： 一种用于机动车辆的液压制动系统设置有用于产生液压动力压力的动力源，主缸，用于响应于制动操作构件的操作引入液压动力压力和致动主缸的液压助力器， 用于制动车轮的车轮制动缸，切换阀和用于将切换阀致动到车轮制动缸与增压器连通的位置的防滑控制装置，并且基于车轮制动缸的液压来调节 当车轮处于滑动状态时助力器中的液压动力压力。 液压制动系统包括当助力器中的液压动力压力低于主缸压力至少预定值时产生动力压力故障信号的故障检测功能，用于禁止防滑的防滑装置 根据故障信号的控制操作，以及当升压器中的液压功率压力超过预定压力时防止故障检测特征产生故障信号的检测防止特征，该预定压力低于用于升压助力器的升压操作的极限压力 。

公开(公告)号：US5393131A

公开(公告)日：1995-02-28

申请号：US114171

申请日：1993-09-01

申请人： Yoshihisa Nomura ,  Michiharu Nishii

发明人： Yoshihisa Nomura ,  Michiharu Nishii

IPC分类号： B60T8/26 ,  B60T8/44 ,  B60T8/48 ,  B60T8/94 ,  B60T13/14 ,  B60T15/36 ,  B60T8/32

CPC分类号： B60T13/145 ,  B60T8/26 ,  B60T8/445 ,  B60T8/4809 ,  B60T8/94

摘要： A hydraulic brake system operates so that under anti-lock control, the braking forces for the rear wheels are enhanced in order to reduce braking loads for the front wheels. Further, upon the occurrence of a malfunction of the anti-locking control, the hydraulic pressure which is supplied to the front and the rear wheels is equalized in order to prevent the rear wheels from locking. In preferred embodiments, a small hydraulic pressure is supplied from a master cylinder to the front wheels while a large pressure is supplied from a brake booster to the rear wheels. Due to the large fluid pressure, the braking forces of the rear wheels are enhanced so that the rear wheels might tend to lock easily. However, anti-lock control can be performed effectively in order to avoid the rear wheels from locking. Upon the malfunction of the anti-lock control, a switching valve is operated so that the brake pressure which is supplied to the front and the rear wheels is equalized. The switching valve operates so that the braking forces of the rear wheels are mutually reduced in comparison to the braking forces of the front wheels. Therefore, it is also possible to prevent the rear wheels from locking if the anti-lock control fails. Thus, the vehicle stability is maintained even if the anti-lock control fails.

摘要翻译： 液压制动系统的操作使得在防抱死控制下，后轮的制动力增强，以减少前轮的制动负荷。 此外，在发生防抱死控制的故障时，向后轮供给的液压相等，以防止后轮卡止。 在优选实施例中，从主缸向前轮供给小的液压，同时从制动助力器向后轮供给较大的压力。 由于大的流体压力，后轮的制动力增强，使得后轮易于被锁定。 然而，可以有效地执行防抱死控制，以避免后轮的锁定。 在防抱死控制的故障时，操作切换阀，使得提供给前轮和后轮的制动压力相等。 切换阀的操作使得与前轮的制动力相比，后轮的制动力相互减小。 因此，如果防抱死控制失败，也可以防止后轮锁定。 因此，即使防抱死控制失败，也保持车辆稳定性。

公开(公告)号：US4876853A

公开(公告)日：1989-10-31

申请号：US11240

申请日：1987-02-05

申请人： Kenji Shirai ,  Yoshihisa Nomura

发明人： Kenji Shirai ,  Yoshihisa Nomura

IPC分类号： B60T11/20 ,  B60T13/12 ,  B60T13/14

CPC分类号： B60T13/145

摘要： A tandem master cylinder with a booster used for a hydraulic actuator such as an automotive brake system. The master cylinder has a first and a second independently movable presser piston disposed in tandem in a first housing such that the presser pistons and the first housing define a first and a second pressure chamber. The booster has a first power piston advanced by a fluid pressure in a first power chamber formed in a second housing, to advance the first presser piston. The booster has a valve operable due to a relative movement between the first power piston, and an operating member for operating said booster, whereby the fluid pressure in the first power chamber is controlled according to an operating force applied to the operating member. In a third housing, there is disposed a second power piston, which has opposite pressure-receiving faces one of which receives a fluid pressure in the second pressure chamber, the other face receiving a fluid pressure in a second power chamber, whereby the fluid pressure in the second pressure chamber is controlled according to the fluid pressure in the second power chamber. The second power chamber is connected to the first power chamber.

摘要翻译： 具有用于诸如汽车制动系统的液压致动器的助力器的串联主缸。 主缸具有在第一壳体中串联设置的第一和第二独立可移动的压脚活塞，使得压脚活塞和第一壳体限定第一和第二压力室。 助推器具有通过形成在第二壳体中的第一动力室中的流体压力推进的第一动力活塞，以推进第一压力活塞。 增压器具有由于第一动力活塞和用于操作所述助力器的操作构件之间的相对移动而可操作的阀，由此根据施加到操作构件的操作力来控制第一动力室中的流体压力。 在第三壳体中设置有第二动力活塞，其具有相对的压力接收面，其中一个压力接收面接收第二压力室中的流体压力，另一个面在第二动力室中接收流体压力，由此流体压力 在第二压力室中根据第二动力室中的流体压力来控制。 第二动力室连接到第一动力室。