公开(公告)号：US20090320464A1

公开(公告)日：2009-12-31

申请号：US12215438

申请日：2008-06-26

申请人： Charles L. Gray, JR. ,  Mark Stuhldreher

发明人： Charles L. Gray, JR. ,  Mark Stuhldreher

IPC分类号： B60T13/12

CPC分类号： B60T13/143

摘要： A hydraulic brake system includes a piston that separates a first pressure chamber from a second pressure chamber of a cylinder bore. A valve within a piston bore is movable between three positions. In the first position, the first and second pressure chambers are in fluid communication with a low-pressure fluid supply; in the second position, the second pressure chamber is isolated from the first pressure chamber and the low-pressure fluid supply; in the third position, a high-pressure fluid supply is in fluid communication with the second pressure chamber, allowing high-pressure fluid to flow into the second pressure chamber. High pressure in the second pressure chamber moves the boost piston, applying boosted braking pressure to a vehicle brake. Pressure in the second chamber against a surface of the valve biases the valve toward the first position. An accumulator stores pressurized fluid and provides the high-pressure fluid supply, enabling on-demand brake boosting force during engine-off operation of a hybrid vehicle.

摘要翻译： 液压制动系统包括将第一压力室与气缸孔的第二压力室分离的活塞。 活塞孔内的阀可在三个位置之间移动。 在第一位置，第一和第二压力室与低压流体供应流体连通; 在第二位置，第二压力室与第一压力室和低压流体供应隔离; 在第三位置，高压流体供应与第二压力室流体连通，允许高压流体流入第二压力室。 第二压力室中的高压使升压活塞移动，向车辆制动器施加增压的制动压力。 在第二腔室内相对于阀门表面的压力将阀向第一位置偏压。 蓄能器存储加压流体并提供高压流体供应，从而在混合动力车辆的发动机关闭操作期间实现按需制动助力。

公开(公告)号：US08522546B2

公开(公告)日：2013-09-03

申请号：US12215438

申请日：2008-06-26

申请人： Charles L. Gray, Jr. ,  Mark Stuhldreher

发明人： Charles L. Gray, Jr. ,  Mark Stuhldreher

IPC分类号： B60T13/14

CPC分类号： B60T13/143

摘要： A hydraulic brake system includes a piston that separates a first pressure chamber from a second pressure chamber of a cylinder bore. A valve within a piston bore is movable between three positions. In the first position, the first and second pressure chambers are in fluid communication with a low-pressure fluid supply; in the second position, the second pressure chamber is isolated from the first pressure chamber and the low-pressure fluid supply; in the third position, a high-pressure fluid supply is in fluid communication with the second pressure chamber, allowing high-pressure fluid to flow into the second pressure chamber. High pressure in the second pressure chamber moves the boost piston, applying boosted braking pressure to a vehicle brake. Pressure in the second chamber against a surface of the valve biases the valve toward the first position. An accumulator stores pressurized fluid and provides the high-pressure fluid supply, enabling on-demand brake boosting force during engine-off operation of a hybrid vehicle.

公开(公告)号：US20120000725A1

公开(公告)日：2012-01-05

申请号：US13232677

申请日：2011-09-14

申请人： Mark Stuhldreher ,  Charles L. Gray, JR. ,  David James Haugen

发明人： Mark Stuhldreher ,  Charles L. Gray, JR. ,  David James Haugen

IPC分类号： B62D5/06

CPC分类号： B62D5/0837 ,  B62D5/065

摘要： Motor vehicles are equipped with a center-closed power steering system to provide power steering assistance in engine-off conditions for reduced fuel consumption. The power steering system includes a hydraulic pump mechanically driven by the engine, a high pressure accumulator, a steering gearbox fluidly connected to the accumulator, and a center closed valve mechanically connected to a driver-operated steering wheel. The valve is configured to selectively control flow of pressurized fluid from the accumulator to the steering gearbox to provide power steering assistance.

摘要翻译： 机动车辆配备有中央关闭的动力转向系统，以在发动机关闭条件下提供动力转向辅助以减少燃料消耗。 动力转向系统包括由发动机机械驱动的液压泵，高压蓄能器，流体连接到蓄能器的转向齿轮箱，以及机械地连接到驾驶员操纵的方向盘的中心关闭阀。 阀被配置成选择性地控制加压流体从蓄能器到转向齿轮箱的流动，以提供动力转向辅助。