| 摘要 |
<p>PURPOSE:To prevent engine power from dropping in time of overboost controlling as well as to secure the high supercharging pressure that is desired, by making it so as to enlarge a running range performing feedback control with a displacement variable device in time of the overboost control. CONSTITUTION:With first and second controlled variable operational devices 3 and 4, each controlled variable of a displacement variable device 7 and an exhaust bypass valve 8 is calculated according to a deviation between the detected supercharging pressure out of a deviation operational device 9 and the desired supercharging pressure and a running state. With a running range discriminating result. An overboost control device, which raises the desired supercharging pressure for the specified time long in case of discriminating sudden accelerating time, consists of an acceleration discriminating device 11, an adding device adding an accelerating compensation value in case of discriminating the sudden accelerating time, and another adding device 12 adding a desired supercharging pressure rising portion in case of discriminating the sudden accelerating time.</p> |
