Patent ID: 7003394

Claim:
An engine controller to control an injection quantity or intake airflow supplied to a cylinder of an engine mounted on a vehicle correspondingly to a driver's accelerator operation amount, comprising: a vehicle specifications administrator capable of reconfiguring one or more constants based on vehicle specifications such as a vehicle weight, an effective tire radius, or a final gear ratio when a change is made to the vehicle specifications associated with an increase or a decrease in a running resistance of the vehicle; a target acceleration calculator for determining target acceleration from the driver's accelerator operation amount and an acceleration resistance calculator for determining an acceleration resistance using the target acceleration and a constant based on the vehicle weight; a running resistance calculator for adding at least an air resistance and a rolling resistance to the acceleration resistance to determine a running resistance for running the vehicle at the target acceleration; a driving wheel torque calculator for determining a driving wheel torque using the running resistance and a constant based on the effective tire radius; and a transmission output shaft torque calculator for determining an engine output shaft torque equivalent to a driver-requested torque using the driving wheel torque and a constant based on the final gear ratio.