Control system for internal combustion engines for automotive vehicles

摘要

An upshift of an automatic transmission of an automotive vehicle is carried out when a sudden decrease in a stepping-on amount of an accelerator pedal of the vehicle is detected. The opening of a throttle valve arranged in an intake passage of an internal combustion engine installed on the vehicle is closed when the stepping-on amount of the accelerator has increased during the upshift after the sudden decrease in the stepping-on amount. Engagement of one of speed clutches of the automatic transmission to be selected for the upshift is started upon the closing of the throttle valve. Control of the opening of the throttle valve in response to the stepping-on amount of the accelerator pedal is started after the rotational speed of the output side of the one of the speed clutches and the rotational speed of the input side of the same become substantially equal to each other through the engagement of the one of the speed clutches.