公开(公告)号：US4856381A

公开(公告)日：1989-08-15

申请号：US180762

申请日：1988-04-12

申请人： Makoto Funahashi ,  Seitoku Kubo ,  Shinya Nakamura

发明人： Makoto Funahashi ,  Seitoku Kubo ,  Shinya Nakamura

IPC分类号： F16H61/04 ,  F16H61/06 ,  F16H61/08 ,  F16H61/10

CPC分类号： F16H61/067 ,  F16H2061/0485 ,  Y10T477/69377 ,  Y10T477/69378

摘要： Herein disclosed is a fluid pressure control system which is to be used in an automatic transmission for automobiles. If a reverse range is selected by selector means such as a manual valve, a fluid pressure is fed via an accumulator to friction engaging means for setting the reverse range, and a signal pressure is fed to back pressure regulating means which is constructed of a spool valve. This back pressure regulating means responds to the signal pressure to reduce a load against the fluid pressure to be fed to the friction engaging means. Thus, the fluid pressure to be fed to the friction engaging means via the accumulator drops when the signal pressure is fed. In the reverse range, specifically, the fluid pressure to be fed to the friction engaging means transmits at a lower level to elongate the time period for the engagement so that the gear shift shock for the reverse range is accordingly reduced.

摘要翻译： 这里公开了一种用于汽车的自动变速器中的流体压力控制系统。 如果通过诸如手动阀的选择器装置来选择倒档范围，则通过蓄能器将流体压力供给到用于设定反向范围的摩擦接合装置，并且将信号压力供给到由卷轴构成的背压调节装置 阀。 该背压调节装置响应于信号压力以减小抵抗要供给到摩擦接合装置的流体压力的负载。 因此，当馈送信号压力时，经由蓄能器供给到摩擦接合装置的流体压力下降。 具体而言，在相反的范围内，供给到摩擦接合装置的流体压力以较低的水平传递以延长啮合的时间段，从而相应地减小了相反范围的换档冲击。