THROTTLE POSITION CONTROL METHOD FOR CAR WITH AUTOMATIC TRANSMISSION

摘要

PURPOSE:To prevent blow-up of an engine as well as drop of revolutions at the time of speed change by controlling a throttle at a position computed by using a corresponding relation of the throttle position at each gear position stored in a memory to an engine revolution number. CONSTITUTION:When an operational point is moved from a present area to another car speed area at an electronic controlled device 31, an actuator 14 is controlled to put a clutch 13 off and a throttle position at the time of the speed change is computed by a processor 31d after finishing an advancement of the operational point. Then an engine revolution number Nx after the speed change is computed as the car speed before and after the speed change is controlled at a constant level. As the corresponding relation of the throttle position at the speed change at each gear position to the engine revolution number is stored in a memory 31d, a target throttle position St is obtained from a table corresponding to the revolution number Nx to the gear position after the speed change and an operational volume corresponding to the difference between the position St and the present position Sa is inputted in a motor 30 for positioning the throttle 29 at the target position. This construction permits the car speed before and after the speed change to be kept approximately constant.