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公开(公告)号：US4474413A
公开(公告)日：1984-10-02
申请号：US436665
申请日：1982-10-26
申请人： Glyn Phillip R. Farr
发明人： Glyn Phillip R. Farr
CPC分类号： B60T8/74 , B60T8/4283
摘要： In an hydraulic anti-skid braking system for a vehicle a supply of fluid from a master cylinder is modulated by a modulator assembly in accordance with skid signals from a skid sensing means device, and an hydraulic pump incorporating at least one plunger has a working chamber in communication with the modulator assembly to control brake re-application following skid correction. The modulator assembly incorporates a piston which is normally urged into an advanced inoperative position against a stop by a spring, in which position the piston holds a spring-loaded valve in an open position to place the master cylinder in communication with the brake. Support and expander chambers on opposite sides of the piston are interconnected at all times by a restricted passage with the support chamber defined in a bore in which the piston is guided to slide, between the piston and normally closed dump valve. Thus the position of the piston in the bore is determined by the loading in the spring either augmented or opposed by a force applied to the piston due to any pressure drop across the restricted passage.
摘要翻译： 在用于车辆的液压防滑制动系统中，来自主缸的流体的供应根据来自滑动感测装置的滑动信号由调制器组件调制，并且包括至少一个柱塞的液压泵具有工作室 与调制器组件通信，以便在滑行校正之后控制制动器重新应用。 调节器组件包括一个活塞，该活塞一般通过一个弹簧被推动进入一个停止位置的先进的非工作位置，在该位置，活塞将一个弹簧加载的阀保持在打开位置，以使主缸与制动器连通。 在活塞的相对两侧的支撑和扩张室始终通过限制的通道相互连接，其中支撑室限定在活塞被引导以在活塞和常闭卸载阀之间滑动的孔中。 因此，活塞在孔中的位置由弹簧中的载荷决定，弹簧中的载荷由于通过限制通道的任何压降而被施加到活塞的力增大或相反。
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公开(公告)号：US4012082A
公开(公告)日：1977-03-15
申请号：US624715
申请日：1975-10-22
CPC分类号： B60T8/4095 , Y10S303/90
摘要： An anti-skid hydraulic braking system for a vehicle having the usual wheel cylinders, master cylinder and brake pedal, with a brake release valve interposed ahead of each wheel cylinder for selectively reducing the pressure in the wheel cylinder in accordance with a slip signal generated at the associated wheel. For the purpose of generating a slip signal, positive displacement hydraulic pumps are coupled to the respective wheels, the pumps being connected in a series loop circuit charged with control fluid so that control fluid circulates idly at low pressure in the loop as long as the wheels rotate at the same speed, but with back pressure being developed at the input connection of a pump associated with a wheel which is in a relatively slipping condition of incipient skid. Each brake release valve has an inlet port connected to the master cylinder, an outlet port connected to the wheel cylinder, and a control port which is coupled to the input connection of the associated pump for receiving a pressure signal therefrom. The valve has a first or "signal" piston movable in response to the pressure and a second piston for creating a cavity for temporary accommodation of brake fluid from the wheel cylinder. When the pressure at the control port rises, signaling an incipient skid, movement of the signal piston first cuts off the inlet port to isolate the wheel cylinder from the rest of the regular braking system and then shifts the second piston to create a cavity for accommodating slight reverse flow of fluid from the wheel cylinder, thus releasing the brake sufficiently to avoid a skid.
摘要翻译： 一种用于车辆的防滑液压制动系统，其具有通常的轮缸，主缸和制动踏板，其中制动器释放阀位于每个轮缸前方，用于根据在轮缸中产生的滑动信号选择性地减小轮缸中的压力 相关的轮子。 为了产生滑移信号，正排量液压泵联接到相应的车轮，泵被连接在充满控制流体的串联回路中，使得控制流体在循环中以低压循环循环，只要轮 以相同的速度旋转，但是在与处于初始滑移的相对滑动状态的轮的相关联的泵的输入连接处产生背压。 每个制动器释放阀具有连接到主缸的入口端口，连接到轮缸的出口端口，以及耦合到相关泵的输入连接件的控制端口，用于从其接收压力信号。 该阀具有响应于该压力而可移动的第一或“信号”活塞，以及用于产生用于临时容纳来自轮缸的制动流体的空腔的第二活塞。 当控制口处的压力升高时，发出一个初期的滑行，信号活塞的移动首先切断进气口，将轮缸与其余的常规制动系统隔离，然后移动第二个活塞，以形成容纳 来自轮缸的流体略微反向流动，从而充分释放制动器以避免滑动。
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3.发明授权Vehicle antiskid control apparatus with flow rate control valve in discharge passage 失效车辆防滑控制装置，带有排放通道中的流量控制阀
公开(公告)号：US4779934A
公开(公告)日：1988-10-25
申请号：US059122
申请日：1987-06-03
申请人： Hiromi Ando
发明人： Hiromi Ando
CPC分类号： B60T8/5093 , B60T8/4225 , B60T8/74
摘要： An antiskid apparatus provided in a communicating passage extending between a master cylinder and a brake cylinder in a brake system for a vehicle includes a flow rate control valve provided in a discharge passage which connects a pressure regulating chamber and a damping valve. The flow rate control valve includes a valve body having a flow path which defines a part of the discharge passage, and a valve member disposed in such a manner as to be reciprocal along the flow path. The valve member is normally separated from a valve seat formed on the valve body by the action of a spring in order to open the flow path. When subjected to pressure supplied from the pressure regulating chamber, the valve member is brought into contact with the valve seat to close the flow path. The valve member is provided with an orifice which provides communication between the flow path and a portion of the discharge passage on the side thereof which is closer to the pressure regulating chamber. Thus, the response of the flow rate control valve is improved, and it is possible to facilitate the production thereof and lower the production cost of the apparatus.
摘要翻译： 一种在车辆制动系统中在主缸和制动缸之间延伸的连通通道中的防滑装置包括设置在连接压力调节室和阻尼阀的排出通道中的流量控制阀。 流量控制阀包括具有限定排出通道的一部分的流路的阀体和沿着流路相互配置的阀构件。 阀构件通常通过弹簧的作用与形成在阀体上的阀座分离，以便打开流路。 当受到从压力调节室供给的压力时，阀构件与阀座接触以关闭流路。 阀构件设置有孔，其在流动路径和排出通道的在其更靠近压力调节室的一侧的一部分之间提供连通。 因此，流量控制阀的响应得到改善，并且可以促进其生产并降低设备的生产成本。
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4.发明授权Anti-skid device including a gear-driven cam pumping unit with fail-safe features 失效防滑装置包括具有故障安全功能的齿轮驱动凸轮抽油机
公开(公告)号：US3951465A
公开(公告)日：1976-04-20
申请号：US368429
申请日：1973-06-08
申请人： Jack W. Stage
发明人： Jack W. Stage
CPC分类号： B60T8/3295 , Y10S188/01
摘要： A motor vehicle wheel engages a gear which drives a multistage cam which actuates a system of hydraulic valves and pistons. A pressure-sensitive spool valve detects when the hydraulic pressure in the brake system exceeds the value which causes the wheel to enter the skid mode. The hydraulic pressure from the brake system passes through the pressure-sensitive valve to the system of hydraulic valves and pistons operated by the cam. The outlet of the hydraulic valve and piston system goes to the brake cylinder in the wheel. During the skid mode, a valve in the hydraulic valve and piston system closes and a cam action on one of the pistons in the system causes a pumping pressure to be applied to the brake cylinder. This anti-skid device further includes two fail-safe features to protect against system failure.
摘要翻译： 机动车轮与驱动驱动液压阀和活塞系统的多级凸轮啮合。 压敏滑阀检测制动系统中的液压何时超过使车轮进入滑行模式的值。 来自制动系统的液压通过压敏阀到由凸轮操作的液压阀和活塞的系统。 液压阀和活塞系统的出口进入车轮的制动液压缸。 在滑行模式期间，液压阀和活塞系统中的阀关闭，并且系统中的一个活塞上的凸轮作用使泵送压力施加到制动缸。 该防滑装置还包括两个故障安全功能，以防止系统故障。
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公开(公告)号：US4626044A
公开(公告)日：1986-12-02
申请号：US639817
申请日：1984-08-13
申请人： Gunther Obstfelder
发明人： Gunther Obstfelder
CPC分类号： F16D57/06 , B60T8/32 , B60T8/4809
摘要： A hydraulic brake having an electrohydraulic antiskid system with a high switching frequency which is speed-proportional. The switching frequency is determined from the number of cross holes in a gear and the gear speed. The cut-in time is electronically determined in a computer and control circuit by a speed comparison of all wheels, whereby the switching frequencies of the passing teeth of a transport gear to a sensor are used as control impulses. If the computer and control circuit determines a deviation, e.g., if a wheel is being braked too sharply and, therefore, runs slower than the other wheels, a camshaft is rotated only in a forward direction, thus activating an antiskid system. If the difference is zero, the camshaft falls back into its initial position, the antiskid system is cut-out and only the braking system of the piston is operating.
摘要翻译： 具有速度成比例的具有高开关频率的电动液压防滑系统的液压制动器。 开关频率由齿轮中的十字孔数和齿轮速度决定。 通过所有车轮的速度比较，在计算机和控制电路中电子地确定切入时间，由此将传送齿轮传递到传感器的通过齿的切换频率用作控制脉冲。 如果计算机和控制电路确定偏差，例如，如果车轮制动太急剧，并且因此比其他车轮运行慢，则凸轮轴仅在向前方向上旋转，从而启动防滑系统。 如果差值为零，则凸轮轴回到其初始位置，防滑系统被切断，只有活塞的制动系统正在运行。
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公开(公告)号：US4210369A
公开(公告)日：1980-07-01
申请号：US968276
申请日：1978-12-11
申请人： Charles R. Curnutt
发明人： Charles R. Curnutt
CPC分类号： B60T8/4095
摘要： Controlled braking of a vehicle wheel is provided by inserting between the normal hydraulic pressure applied by the brake pedal and the brake drum or brake disc an hydraulic control system comprising a rotatable clutch and hydraulic pump together with a bypass valve. The arrangement is such that application of braking action on the foot pedal urges the clutch into engagement with the wheel disc or drum so that the clutch will rotate with the disc or drum. The hydraulic pump in turn is coupled to the clutch to rotate with the clutch and provide output hydraulic pressure proportional to the speed of rotation of the clutch. The outlet and inlet of the pump are connected to a bypass valve so that recirculation can take place. A further hydraulic line from the pump outlet connects to the normal friction means hydraulically controlled for engaging the disc or drum to brake the wheel. With this arrangement, when the brakes are initially applied, high hydraulic pressure will be applied to the wheel disc or drum because of the relatively high RPM of the pump. As the wheel slows, the RPM of the pump also decreases, thereby decreasing the hydraulic pressure applied to the friction means engaging the wheel disc or drum.
摘要翻译： 通过在由制动踏板和制动鼓或制动盘施加的正常液压之间插入包括可旋转离合器和液压泵以及旁通阀的液压控制系统来提供车轮的受控制动。 该布置使得在脚踏板上施加制动作用促使离合器与轮盘或滚筒接合，使得离合器将与盘或滚筒一起旋转。 液压泵又联接到离合器上以与离合器一起旋转并提供与离合器的转速成比例的输出液压。 泵的出口和入口连接到旁通阀，从而可以进行再循环。 来自泵出口的另一液压管路连接到液压控制的常规摩擦装置，用于接合盘或滚筒以制动车轮。 通过这种布置，当最初施加制动时，由于泵的相对高的RPM，高液压将被施加到轮盘或滚筒。 当车轮减速时，泵的RPM也减小，从而降低施加到接合轮盘或滚筒的摩擦装置的液压。
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公开(公告)号：US4025124A
公开(公告)日：1977-05-24
申请号：US484603
申请日：1974-07-01
IPC分类号： B60T8/1761 , B60T8/32 , B60T8/42 , B60T8/74 , G01P15/00 , G01P15/03 , G01P15/08 , B60T8/087 , B60T13/16
CPC分类号： B60T8/17613 , B60T8/3295 , B60T8/4208 , B60T8/74 , G01P15/00 , G01P15/032 , G01P15/0888 , Y10S188/01
摘要： A piston pump with a controllable stroke is described. It is a positive displacement type pump with several stages and also a continuous variable stroke. The pump piston is only effectively connected with the drive during the working stroke. For example, the pump serves particularly for controlling the braking force in an anti-locking system for vehicles. In every pump cycle it can vary the volume in the braking system, and thus the brake force, without letting fluid out of the brake system. It makes possible the amplitude control of brake pressure pulsations and a desirable brake pressure course. In addition, an anti-locking system with a special two-stage pump device is described. Furthermore, a hydraulic circuit of great utility for anti-locking systems is shown.
摘要翻译： 描述了具有可控行程的活塞泵。 它是一个具有几个阶段的正排量型泵，也是连续的可变冲程。 泵活塞在工作行程期间仅与驱动器有效连接。 例如，该泵特别用于控制用于车辆的防抱死系统中的制动力。 在每个泵循环中，可以改变制动系统中的体积，从而改变制动力，而不会使液体离开制动系统。 制动压力脉动的幅度控制和理想的制动压力进程成为可能。 另外，描述了具有特殊两级泵装置的防抱死系统。 此外，示出了用于防锁系统的很好的液压回路。
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公开(公告)号：US3994534A
公开(公告)日：1976-11-30
申请号：US550995
申请日：1975-02-19
CPC分类号： B60T8/4095
摘要： In an hydraulically-operated braking system for vehicles a supply of hydraulic fluid under pressure from a pump is utilized for applying a wheel brake, and the pump is responsive to rotation of the braked wheel so that the brake applying force is dependent upon the speed of rotation of the wheel and the wheel is automatically prevented from locking, and the system incorporates an hydraulic accumulator adapted to define a reservoir of high pressure for providing an instantaneous supply of high pressure fluid to apply the brake.This invention relates to improvements in hydraulically-operated braking systems for vehicles of the kind in which at least one brake is adapted to be applied in response to a supply of hydraulic fluid under pressure from a pump, and the pump is responsive to rotation of a wheel so that a brake applying force is dependent upon the speed of rotation of the wheel and the wheel is automatically prevented from locking.In known braking systems of the kind set forth a time delay may occur whilst the pump is generating within the system sufficient pressure to apply the brakes. Such a delay may be considerable in systems for operating large brakes where it is inconvenient to utilise a large pump adapted to operate at a high delivery rate when the speed of the vehicle is high.According to our invention an hydraulically operated braking system of the kind set forth incorporates an hydaulic accumulator adapted to define a reservoir of high pressure for providing an instantaneous supply of high pressure fluid to apply the brake.The hydraulic accumulator is connected to the brakes through a brake control valve of which the operation is controlled by the pressure from the pump thereby ensuring that operation of the brake is dependent upon the speed of rotation of the wheel.Preferably, by-pass means are provided for by-passing the brake control valve so that the pressure from the pump can be applied directly to the brake in the event of exhaustion of pressure in, or failure of, the hydraulic accumulator.The accumulator is charged between brake applications by the pressure from the pump which is supplied to the accumulator through a pressure regulating valve so constructed and arranged that when the brake is applied communication between the pump and the accumulator is cut-off, and the pump pressure is solely applied to the brake control valve.
摘要翻译： 在用于车辆的液压操作制动系统中，来自泵的压力下的液压流体供应用于施加车轮制动器，并且泵响应于制动轮的旋转，使得制动器施加力取决于 轮子和车轮的旋转被自动地防止锁定，并且系统包括液压蓄能器，其适于限定高压储存器，用于提供施加制动器的高压流体的瞬时供应。
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公开(公告)号：US4387934A
公开(公告)日：1983-06-14
申请号：US275669
申请日：1981-06-22
申请人： Glyn P. R. Farr
发明人： Glyn P. R. Farr
CPC分类号： B60T8/4283
摘要： In a braking system a dump valve opens during an imminent skid condition to dump fluid from a brake circuit to a reservoir space. A reservoir piston defining a boundary of the reservoir space then moves in a first bore against a spring so that a control rod, integral with the reservoir piston, allows a ball valve member to engage with its seat to cut-off communication between a master cylinder and a wheel brake. Simultaneously, fluid flows from the reservoir space through an inlet valve to a working chamber of a pump provided in a second bore in the reservoir piston so that a pump piston working in the bore engages with a rotatable eccentric. Fluid is then pumped from the pump chamber, past an outlet valve through an outlet passage in the control rod, and returned to the reservoir space through the open dump valve.
摘要翻译： 在制动系统中，在迫切的滑动条件下打开泄放阀，以将流体从制动回路转储到储存空间。 限定储存空间边界的贮存器活塞然后在第一孔中抵靠弹簧移动，使得与储存器活塞成一体的控制杆允许球阀构件与其座位接合以截断主缸之间的连通 和车轮制动器。 同时，流体从存储器空间通过入口阀流到设置在储存器活塞的第二孔中的泵的工作室，使得在孔中工作的泵活塞与可旋转的偏心件相啮合。 然后从泵室泵送流体，通过出口阀通过控制棒中的出口通道，并通过打开的排放阀返回到储存空间。
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公开(公告)号：US4032200A
公开(公告)日：1977-06-28
申请号：US682980
申请日：1976-05-04
CPC分类号： B60T8/3225 , B60T8/32
摘要： In an anti-skid hydraulic braking system for a vehicle a master cylinder supplying fluid under pressure to apply a brake includes an operating piston and a boost piston both working in a common bore with a boost chamber defined in the bore between adjacent ends of the piston. A boost control valve is provided between the pistons and is movable between a normally open inoperative position in which the boost chamber is in communication with return and outlet ports in the cylinder and an operative closed position when the master cylinder is operated in which the boost chamber is isolated from the return and outlet ports so that pressure in the boost chamber is increased to advance the boost piston in the bore to pressurize liquid in a pressure space.
摘要翻译： 在用于车辆的防滑液压制动系统中，在压力下供应流体以施加制动器的主缸的主缸包括操作活塞和增压活塞，所述操作活塞和增压活塞都在共同的孔中工作，所述增压室具有限定在活塞的相邻端之间的孔中的增压室 。 升压控制阀设置在活塞之间，并且可在正常开启的非工作位置之间移动，其中升压室与气缸中的回流口和出口连通，并且在主缸操作时操作关闭位置，其中增压室 与回流口和出口端口隔离，使得增压室中的压力增加，以将增压活塞推进到孔中以在压力空间中加压液体。
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