Patent ID: 7905807
Filing Date: 2011-03-15
Classification: B60K,B60L,F16H,Y02T

Abstract:
1. A hydraulic control apparatus for an automatic transmission provided with a first friction engaging element and a second friction engaging element that are capable of supplying a control pressure that is regulated and controlled by one pressure regulating solenoid valve to each of a plurality of hydraulic servos, comprising: a switching device that switches between a hydraulic servo of the plurality of hydraulic servos of the first friction engaging element and a hydraulic servo of the plurality of hydraulic servos of the second friction engaging element so as to supply a control pressure from the one pressure regulating solenoid valve to each of the plurality of hydraulic servos, wherein: a range switching valve that is capable of setting an output state of at least one of a forward travel range pressure and a reverse travel range pressure according to an operating input to a shift selecting device that is operable to select a shift position, wherein: