Control device for internal combustion engine with supercharger

摘要

The present invention is a proposal relating to cooperative manipulation of an actuator which actively changes a supercharging pressure and a throttle in the case of application of torque demand control to an internal combustion engine with a supercharger. A control device provided by the present invention separately determines a target air quantity for manipulation of the throttle, and a target air quantity for manipulation of the actuator. In more detail, driver required torque which is included in required torque is converted into an air quantity in accordance with a predetermined conversion rule, and the air quantity which is obtained by the conversion is determined by calculation as a reference target air quantity. The reference target air quantity is used as a target air quantity for throttle manipulation, and is also used as a target air quantity for actuator manipulation at a normal time. When a change occurs to the required torque, and the change cannot be realized under the reference target air quantity, a correction target air quantity capable of realizing the change is determined by calculation, and is used as the target air quantity for throttle manipulation.

主权项

1. A control device for an internal combustion engine with a supercharger having an actuator which actively changes a supercharging pressure, the control device controlling an air quantity which the internal combustion engine takes in a cylinder by cooperative manipulation of a throttle and the actuator based on required torque for the internal combustion engine, the control device comprising:
target air quantity determining means that separately determines a target air quantity for manipulation of the throttle, and a target air quantity for manipulation of the actuator; throttle manipulation variable determining means that determines a manipulation variable of the throttle in accordance with the target air quantity for throttle manipulation; and actuator manipulation variable determining means that determines a manipulation variable of the actuator in accordance with the target air quantity for actuator manipulation, wherein the target air quantity determining means comprises reference target air quantity calculating means that converts driver required torque which is included in the required torque into an air quantity in accordance with a predetermined conversion rule, and calculates the air quantity which is obtained by the conversion as a reference target air quantity, correction target air quantity calculating means that, when a change occurs to the required torque and cannot be realized under the reference target air quantity, calculates a correction target air quantity capable of realizing the change, actuator manipulation target air quantity determining means that determines the reference target air quantity as the target air quantity for actuator manipulation, and throttle manipulation target air quantity determining means that normally determines the reference target air quantity as the target air quantity for throttle manipulation, and determines the correction target air quantity as the target air quantity for throttle manipulation when the required torque cannot be realized under the reference target air quantity.