A shift control system of an automatic transmission sets a predetermined gear stage by applying a first frictional engagement element and releasing a second frictional engagement element. A pressure regulating mechanism regulates an oil pressure to be fed to or drained from the first frictional engagement element. A failure detector detects a failure of an apparatus to participate in the regulation and control of the oil pressure which is to be fed to or drained from at least one of the first and second frictional engagement elements. A gear stage inhibitor inhibits the setting of the predetermined gear stage if the failure is detected by the failure detector.
申请公布号
US5957800(A)
申请公布日期
1999.09.28
申请号
US19970850383
申请日期
1997.05.02
申请人
TOYOTA JIDOSHA KABUSHIKI KAISHA;AISHIN A.W. CO., LTD.