| 摘要 |
<p>PURPOSE:To improve acceleration performance and fuel consumption by decreasing excessive torque caused by supercharging in a low speed/high range. CONSTITUTION:A blower bypass is opened so as to close blower downstream side in a low speed/high range where engine torque of throttle full open(WOT) becomes large with respect to a torque converter transmission volume, in an engine provided with a turbosupercharger for vehicle having an automatic transmission, and then as natural intake air(NA), the torque is once raised to the NA line (A-B) by full open acceleration, for instance, at the time of accelerating the vehicle, and the torque is transferred to the switching point (B') while remaining as that of NA. It is rapidly raised to the WOT line, and fuel consumption is decreased by decreasing wasteful supercharging, and then acceleration performance can be improved by increasing turbine rotation. The heat efficiency is improved by switching an ignition timing to the advance side simultaneously with decreasing supercharging pressure by opening a relief valve, in the engine provided with a mechanical type supercharger.</p> |
