Abstract: A control system for an automatic transmission in an automotive vehicle selects an appropriate shift pattern in compliance with the temperature of hydraulic oil contained in a torque converter of the automatic transmission. The control system includes a transmission control unit having a plurality of shift patterns including a first shaft pattern favored for a cold engine and a second shift pattern favored for an engine after warm-up, an oil sensor for detecting the temperature of hydraulic oil contained in or supplied to the torque converter, a timer for counting the time period after engine starting, and a CPU for selecting either the first or second shift pattern. The first shaft pattern is selected when the temperature of hydraulic oil is less than a preset value, whereas the second shift pattern is selected when the time set by the timer is up.

Abstract: A control system for controlling the timing for sparking an engine is adapted to retard a spark timing in a predetermined amount at the time of accelerating. An amount of retarding the spark timing at the time of accelerating is set to be gradually increased and then to be gradually decreased. The retarding amount at the time of accelerating is preferably changed in each spark cycle, namely, in each spark timing.