Control apparatus of automatic tranmission

专利名称：Control apparatus of automatic tranmission发明人：TSUKAMOTO, KAZUMASA,HAYABUCHI,

MASAHIRO,NISHIDA,

MASAAKI,YAMAMOTO, YOSHIHISA,SUZUKI,AKITOMO

申请号：EP96115380申请日：19960925公开号：EP0781943A3公开日：19980812

摘要：It is an object of the present invention to provide an automatic transmission witha simple and compact control apparatus for controlling clutch-to-clutch transmission-ratio shift involving a fourth brake (band brake). During the clutch-to-clutch shift, thefourth brake (band brake) is used in a self-loosening direction in which an engaging forcethereof is not sensitive to variations in hydraulic pressure and a second regulated

hydraulic pressure generated by a second pressure regulating valve (B-4 control valve) inaccordance with a control hydraulic pressure generated by a second (throttle-pressure-control) linear solenoid valve in a margin control region thereof is supplied to a hydraulicservo of the fourth brake (band brake). In this clutch-to-clutch shift, a first regulatedhydraulic pressure generated by a first pressure regulating valve (a shift-pressurecontrol valve) in accordance with a control hydraulic pressure generated by a first(pressure-regulation) linear solenoid valve is supplied to a hydraulic servo of a third (UDdirect) clutch. In addition, as a stand-alone element, the fourth brake (band brake) is alsoused in a self-tightening direction in which the engaging force is sensitive to variations in

hydraulic pressure. At that time, the first regulated hydraulic pressure generated by thefirst pressure regulating valve (the shift-pressure control valve) is supplied to thehydraulic servo of the fourth brake (band brake).

申请人：AISIN AW CO., LTD.

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