Control system for automatic transmission
    4.
    发明授权
    Control system for automatic transmission 失效
    自动变速器控制系统

    公开(公告)号:US5921885A

    公开(公告)日:1999-07-13

    申请号:US776842

    申请日:1997-02-13

    摘要: An automatic transmission control system is equipped with a pressure modulating valve for regulating the engaging pressure to be supplied to frictional engagement elements for setting respective gear stages of the automatic transmission, a signal pressure output valve for providing signal pressure, and a switching valve. The control system further includes a switching valve for switching destinations of signal pressure for setting pressure regulation level between pressure modulating valve and other control valve; an abnormality-detection element for detecting, in gear shift to a gear stage set by the frictional engagement elements engaged on delivery of regulated oil pressure, abnormal regulation of engaging pressure to be delivered to the frictional engagement elements and abnormal operation due to delivery of the signal pressure to the control valve; and gear-shift-inhibition element for inhibiting shift to the gear stage in case that the abnormality-detection element detects at least one of abnormal pressure regulation and the abnormal operation.

    摘要翻译: PCT No.PCT / JP96 / 01590 Sec。 371日期1997年2月13日 102(e)1997年2月13日PCT PCT 1996年6月12日PCT公布。 公开号WO97 / 00391 日期1997年1月31日自动变速器控制系统配备有压力调节阀,用于调节供给到用于设定自动变速器的各档位的摩擦接合元件的接合压力,用于提供信号压力的信号压力输出阀和 开关阀。 所述控制系统还包括切换阀,用于切换压力调节阀和其它控制阀之间的压力调节水平的信号压力的目的地; 一种异常检测元件,用于检测在由调节油压输送接合的摩擦接合元件设定的齿轮级的变速中,检测到传递到摩擦接合元件的接合压力的异常调节和由于传递到摩擦接合元件的异常操作 对控制阀的信号压力; 以及在异常检测元件检测到异常压力调节和异常操作中的至少一个的情况下,禁止换档到档位的挡位元件。