Speed change control device for automobile

Abstract

Abstract PURPOSE:To surely prevent speed change shocks by determining a torque set value to which the torque is decreased during speed change operation from the initiation to the termination of every speed change, and by carrying out a spark retardation control or the like for actually decreasing the torque. CONSTITUTION:During operation of a vehicle, an electronic control device 4 determines whether a speed change signal is delivered or not, and if the speed change signal is present, gear ratios before and after the speed change are set. That is, if it is determined to be in a speed change condition in view of a speed change condition flag, the gear ratios are calculated from the input and output rotational speeds of a transmission. Then in accordance with these gear ratios, the initiation and termination of speed change are determined. During the period from the initiation to the termination of the speed change, a signal indicating a decreasing amount in engine torque which is set in memory in a CPU in accordance with the kind (shift position) of the speed change and the opening degree of a throttle value is delivered to an engine controller 4 so as to decreased the engine torque.

Inventors

• 👤 Yasunobu Ito
• 👤 Kenji Suzuki

Bibliographic Details