CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION

摘要

In a control apparatus for an automatic transmission that changes speed of an engine output and transmits it to driven wheels, having an electromagnetic control valve installed in a hydraulic pressure supply device of the transmission and operated upon receipt of current to control hydraulic pressure supply to the transmission; and a current supply controller composed of a microcomputer installed on an electronic circuit board, calculating a current supply command value of the current supplied to the valve based on a hydraulic pressure supply control value of the transmission calculated based on the vehicle's operating condition and controlling current supply from a battery to the valve based on the command value, a load detector detects load of an electric device that shares ground set on the board with the valve; and the current supply controller calculates the command value based on the hydraulic pressure supply control value and detected load.