Patent ID: 7905807

Claim:
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: the switching enables a control of an engagement and disengagement of the first friction engaging element and the second friction engagement element using the one pressure regulating solenoid valve, and the switching device inputs the control pressure of the one pressure regulating solenoid valve, and comprises a first switching valve that switches between a first position that supplies the control pressure to the hydraulic servo of the first friction engaging element, and a second position that supplies the control pressure to the hydraulic servo of the second friction engaging element; and 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: the first switching valve is switched to one of the first position and the second position based on at least one of the forward travel range pressure and the reverse travel range pressure.