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    • 1. 发明授权
    • Direct acting electro-hydraulic braking system with regulated leak rate
    • 具有调节泄漏率的直动电动液压制动系统
    • US5297857A
    • 1994-03-29
    • US708413
    • 1991-05-31
    • Gary L. CaseyDaniel J. Patient
    • Gary L. CaseyDaniel J. Patient
    • B60T13/20B60T13/74G05D16/20B60T13/18
    • B60T13/745B60T13/20G05D16/208Y10S303/02Y10S303/03
    • A system and method of controlling pressure in a wheel brake cylinder of a brake. The hydraulic cylinder is connected to an electrically driven pump and a flow control valve is connected between the pump and the wheel cylinder. The system and method operate to control the speed of a motor driven pump to generate a desired pressure in a cylinder of the brake; generate a differential pressure, in the flow control valve, proportional to pump flow and communication same to a spring biased valving element; cause the valving element to move, in response to pressure forces acting on the valving element, generated by the pressure differential, and the force of the bias spring, so as to selectively open and close an associated exhaust port, connected to a drain or sump, such that in the steady state an equilibrium condition is achieved where the pressure forces balance the spring force and the pressure in the hydraulic cylinder is constant.
    • 一种用于控制制动器的车轮制动缸中的压力的​​系统和方法。 液压缸连接到电动泵,并且流量控制阀连接在泵和轮缸之间。 该系统和方法用于控制马达驱动泵的速度以在制动器的气缸中产生所需的压力; 在流量控制阀中产生与泵流量成比例的差压,并将其连接到弹簧偏压阀元件; 导致阀元件响应于由压差产生的压力作用在阀元件上并且偏置弹簧的力而移动,以便选择性地打开和关闭连接到排水口或贮槽的相关联的排气口 使得在稳定状态下实现平衡条件,其中压力平衡弹簧力并且液压缸中的压力是恒定的。
    • 4. 发明授权
    • Electro-hydraulic service & parking brake system
    • 电动液压维修和驻车制动系统
    • US5310251A
    • 1994-05-10
    • US087941
    • 1993-07-06
    • Kenneth S. TowersDaniel J. Patient
    • Kenneth S. TowersDaniel J. Patient
    • B60T13/22B60T13/68
    • B60T13/686B60T13/22
    • In one embodiment the invention comprises a system (50; 200) for controlling service brake and parking functions of at least one wheel of a vehicle comprising: an electric motor (64) drivingly connected to a hydraulic pump (66) for pressurizing hydraulic fluid; the output of the pump communicated to at least one service brake (58a,b), comprising a first hydraulic cylinder (62a,b), an electronics circuit for controlling the speed of the motor (64) to regulate hydraulic pressure in the first hydraulic cylinder in response to operator braking activity (56, 64, 62), the motor and pump providing the primary means of service brake activation. The output of the pump is also communicated to a parking brake mechanism (30; 150), comprising a second hydraulic cylinder (34; 160), the parking brake mechanism having an activated mode of operation corresponding when the second hydraulic cylinder is unpressurized and a deactivated mode of operation corresponding when the second hydraulic cylinder is pressurized, and pressure control valves for controlling flow to and from the various hydraulic cylinders. A second variant of the system is disclosed in which only service brakes are electro-hydraulically controlled.
    • 在一个实施例中,本发明包括一种用于控制车辆的至少一个车轮的行车制动和停车功能的系统(50; 200),包括:驱动地连接到用于对液压流体加压的液压泵(66)的电动机(64) 所述泵的输出传递到至少一个行车制动器(58a,b),包括第一液压缸(62a,b),用于控制所述马达(64)的速度以调节所述第一液压缸 响应于操作者制动活动(56,64,62),电动机和泵提供主要的制动器起动装置。 泵的输出也连通到包括第二液压缸(34; 160)的驻车制动机构(30; 150),所述驻车制动机构具有当所述第二液压缸未加压时对应的激活操作模式,以及 在第二液压缸被加压时对应的停用操作模式和用于控制流入和流出各种液压缸的压力控制阀。 公开了该系统的第二种变型,其中只有行车制动器是电液压控制的。