| 摘要 |
<p>PURPOSE:To prevent generation of acceleration shock caused by operation of decrease in engine torque by suppressing operation of a means which suppresses increase in an intake air pressure in response to the opening of a main throttle valve, only for a specified period, at the time of valve opening operation of an auxiliary throttle from its closed condition. CONSTITUTION:A main throttle valve 7 and an auxiliary throttle valve 8 are arranged in series inside an intake passage 2, and an exhaust turbo supercharger 4 on the upstream side is provided, and the bypass passage 16 of an exhaust turbine 6 is opened/closed by means of an intake air pressure control means (waste gate valve) 11, so as to regulate a turbine front pressure. The auxiliary throttle valve 8 is closed by an engine control unit 20 in response to the slip signal of a slip control unit 25, and when the slip is eliminated, the auxiliary throttle valve 8 is opened, but fuel cut is not performed only for a specified period at the time of transient increase in the intake air pressure, so that acceleration shock by repeated torque down after elimination of the slip control may be prevented.</p> |
