ENGINE BRAKE FORCE CONTROL DEVICE

摘要

PURPOSE:To prevent sudden change of engine brake force at the time of down- shift by providing an engine output increase means to increase an engine output in such a way that 4 drive force before the down-shift is almost equal to the drive force after the down-shift at least when the down-shift is completed. CONSTITUTION:In performing down-shift for increasing engine brake force when an accelerator is off, a throttle valve 20 is controlled to be opened by a throttle control computor 35 to a throttle valve opening at which drive force after the down-shift becomes equal to or a little smaller than the drive force before the down-shift. Almost the same engine brake force as that before the down-shift is thus applied after the down-shift, thereby shock caused by sudden increase of the engine brake force is reduced to improve riding comfortableness.