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    • 1. 发明授权
    • Last resort emergency braking system for heavy vehicle
    • 重型车辆最后的紧急制动系统
    • US3994374A
    • 1976-11-30
    • US598341
    • 1975-07-23
    • Raymond E. Gill
    • Raymond E. Gill
    • B60T1/00B60T13/12F16H61/00B60K29/02
    • F16H61/0059B60T1/005B60T13/12Y10T74/19637
    • An emergency braking system for a vehicle having a transmission of the type having a plurality of selectively pressurized control ports for operating respective clutches for engaging the drive gears in predetermined combinations to provide respective driving ratios. An auxiliary pump of the positive displacement type is driven by one of the vehicle wheels to produce a source of emergency pressure fluid which is available as long as the vehicle is in motion. Emergency valve means are provided for connecting the output of the auxiliary pump simultaneously to a plurality of the control ports on the transmission which tends to connect the gears in contradictory combinations thereby to block the transmission against rotation to provide emergency braking for the vehicle wheels which are connected to the transmission. The auxiliary pump is bridged by pairs of check valves connected face-to-face and back-to-back so that pressurized fluid is available at the output regardless of whether the vehicle is moving forwardly or backing up. The emergency valve means is in the form of an override valve having a set of normal inlet ports connected to the respective control lines and outlet ports connected to the respective control ports of the transmission. The override valve has an emergency inlet port and a plunger responsive thereto which acts to connect the emergency inlet port overridingly to the control ports of the transmission when pressurized fluid is applied from the auxiliary pump.
    • 一种用于车辆的紧急制动系统,其具有这种类型的变速器,所述变速器具有多个选择性加压的控制端口,用于操作各个离合器,用于以预定的组合接合驱动齿轮以提供相应的驱动比。 正排量的辅助泵由车轮之一驱动以产生紧急压力流体源,只要车辆运动就可以使用。 提供了紧急阀装置,用于将辅助泵的输出同时连接到传动装置上的多个控制端口,该多个控制端口倾向于以相互矛盾的组合连接齿轮,从而阻止变速器的旋转以为车轮提供紧急制动, 连接到传输。 辅助泵通过面对面和背对背连接的成对止回阀桥接,使得加压流体在输出处可用,而不管车辆是向前移动还是向后移动。 紧急阀装置是一个超控阀的形式,其具有连接到相应控制线的一组正常入口端口和连接到变速器的相应控制端口的出口。 超控阀具有紧急入口和响应于此的柱塞,当从辅助泵施加加压流体时,其用于将紧急入口端口重叠地连接到变速器的控制端口。
    • 3. 发明授权
    • Fluid operated clutch with dual pistons
    • 带双活塞的液压离合器
    • US4020933A
    • 1977-05-03
    • US608629
    • 1975-08-28
    • Raymond E. Gill
    • Raymond E. Gill
    • F16D25/0638F16D25/063
    • F16D25/0638
    • A fluid pressure actuated friction clutch assembly includes rotatable driving and driven members adapted to be coupled frictionally together by a clutch pack as the pack is compressed by two pistons movable between advanced and retracted positions relative to the driving member. The pistons are moved between their advanced and retracted positions by a non-compressible pressure fluid as the latter is filled and emptied from a main chamber located behind the pistons. Secondary chambers containing pressure fluid urge the pistons toward their retracted positions with one of the pistons being urged rearwardly with a greater force than the other. Accordingly, as the main chamber is filled, the other piston advances to engage and partially compress the clutch pack before the one piston engages the clutch pack to fully compress the clutch pack and thereby complete clutch engagement. During clutch engagement, the movable wall of the chamber as defined by the two pistons prevents the fluid from flowing out of the chamber as the chamber is being filled.
    • 流体压力致动的摩擦离合器组件包括可旋转的驱动和被驱动构件,其适于通过离合器组件摩擦地联接在一起,因为该组件通过两个在相对于驱动构件的先进和缩回位置之间可移动的活塞被压缩。 活塞通过不可压缩的压力流体在其先进和缩回位置之间移动,因为后者从位于活塞后面的主室填充和排空。 包含压力流体的次级室将活塞推向其缩回位置,其中一个活塞以比另一个更大的力被向后推动。 因此,当主室被填充时,在一个活塞接合离合器组件之前,另一个活塞前进以接合和部分地压缩离合器组件,以完全压缩离合器组件,从而完成离合器接合。 在离合器接合期间,由两个活塞限定的室的可移动壁防止当室被填充时流体流出室。