| 摘要 |
PURPOSE:To improve the cost of fuel and the durability by reducing the closing area of a throttle valve when the stepping amount of an accelerator is below a fixed area, keeping the throttle valve near full opening constantly when in the fixed area, and increasing the engine torque when above the fixed area. CONSTITUTION:A supercharger 6, a speed-change ratio adjusting device 18, a throttle actuator 36, and an accelerator position sensor 29 are provided. When the stepping amount of an accelerator is below a fixed area, the number of revolutions of an engine is kept constant to adjust the speed change ratio and the opening degree of a throttle valve 3 in accordance with the stepping amount of the accelerator. When the same is in the fixed area, the throttle valve 3 is kept near full opening constantly, and when above the fixed area, the supercharger 6 is operated. This construction permits to reduce the pumping loss of the engine output and the closing area of the throttle valve and ensure sufficient acceleration for improving the cost of fuel and the durability. |
