| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a supercharging control device for a cylinder injection type spark ignition internal combustion engine, that prevents giving sense of incongruity to a driver by always changing supercharging with identical engine torque, thereby to improve drivability of a vehicle. SOLUTION: A target average effective pressure Pe of engine is calculated by an accelerator opening, and an engine rotation speed (step S4) for carrying out supercharging when the target average effective pressure Pe is equal to or higher than a predetermined threshold Pe0 (steps S6, S10). Since the accelerator opening is correlated with intake air volume of engine, the target average effective pressure Pe itself is also correlated with the intake air volume. Even if pumping loss increases/decrease by a difference in set air-fuel ratios in a stratified charge combustion region, the target average effective pressure Pe comes to a value reflected in the engine torque, without being influenced by its increase/decrease to change supercharging always at identical engine torque.</p> |
