CONTROL UNIT FOR ENGINE WITH AUTOMATIC TRANSMISSION GEAR

PURPOSE:To lower the engine output at the time of speed change in an automatic transmission gear without deteriorating the combustibility by providing a power generation control means for strengthening the generating action of a power generating means at the time of speed change in the automatic transmission gear. CONSTITUTION:In a control unit 21, the speed P2 corresponding to the present driving state is read from a speed-change map, and in case the present speed change stage P1 does not coincide with the speed change stage P2, speed change control is initiated with the value obtained by adding an increase value alpha(alpha>0) to a basic current value (i) as the applied current quantity (I) of a field coil 6, and the applied current quantity is maintained at the value (I) for about one second necessary for a speed change action before being put back to the original value. As a result, a part of the output from the crankshaft 3 of an engine 2 to an automatic transmission gear 16 is temporarily recovered as generating energy during the speed changing period so that the apparent engine output is lowered and speed change shock is reduced. The alteration of an ignition timing and an air-fuel ratio contributing to the combustibility becomes unnecessary, and speed change shock can be reduced without incurring the deterioration of ignitability and the temperature rise of exhaust gas.