公开(公告)号：US5486146A

公开(公告)日：1996-01-23

申请号：US301896

申请日：1994-09-07

申请人： Norimi Asahara ,  Kagenori Fukumura ,  Yasuo Hojo ,  Kazuhisa Ozaki

发明人： Norimi Asahara ,  Kagenori Fukumura ,  Yasuo Hojo ,  Kazuhisa Ozaki

IPC分类号： F16H59/46 ,  F16H61/00 ,  F16H61/02 ,  F16H61/04 ,  F16H61/06 ,  F16H61/14 ,  F16H61/686

CPC分类号： F16H61/143 ,  F16H2059/467 ,  F16H61/0251 ,  F16H61/061 ,  F16H63/502 ,  Y10T477/635 ,  Y10T477/63525

摘要： A hydraulic control circuit for an automatic transmission which has a plurality of hydraulic type frictional engagement elements for switching gear stages and a lockup clutch juxtaposed to a hydraulic power transmission device for transmitting engine power to the gearing. The hydraulic control circuit includes a lockup relay valve for switching oil pressure between an application side oil chamber and a release side oil chamber of the lockup clutch to apply and release the lockup clutch and a lockup switching valve for switching the lockup relay valve. A lockup control valve functions to increase the pressure difference between the application side oil chamber and the release side oil chamber at the time of application of the lockup clutch, as a signal pressure rises. A transient pressure control valve controls the transient pressure of a hydraulic frictional engagement element in accordance with the signal pressure. A single linear solenoid valve regulates the signal pressure fed both to the lockup control valve and to the transient pressure control valve. A signal pressure relay valve has a first output port connected to the lockup control valve and a second output port connected to the transient pressure control valve. The signal pressure relay valve is switched by first and second relay pressures to selectively switch the destination of the signal pressure which is regulated by the linear solenoid valve. When the signal pressure is fed to the accumulator control valve, a modulator oil pressure is fed to the lockup control valve.

摘要翻译： 一种用于自动变速器的液压控制回路，其具有用于切换齿轮级的多个液压式摩擦接合元件和与用于将发动机功率传递给齿轮传动装置的液压动力传递装置并置的锁止离合器。 液压控制回路包括锁止继动阀，用于在应用侧油室和锁止离合器的释放侧油室之间切换油压，以施加和释放锁止离合器，以及用于切换锁止继动阀的锁止切换阀。 锁定控制阀用于在施加锁止离合器时增加施加侧油室与释放侧油室之间的压力差，随着信号压力升高。 瞬时压力控制阀根据信号压力控制液压摩擦接合元件的瞬时压力。 单个线性电磁阀调节供给锁止控制阀和瞬态压力控制阀的信号压力。 信号压力继电阀具有连接到锁止控制阀的第一输出端口和连接到瞬态压力控制阀的第二输出端口。 信号压力继电器阀通过第一和第二继电器压力切换，以选择性地切换由线性电磁阀调节的信号压力的目的地。 当信号压力被馈送到蓄能器控制阀时，调节器油压被馈送到锁止控制阀。