Patent ID: 6424906
Filing Date: 2002-07-23
Classification: F02D

Abstract:
A closed-loop actuator control circuit, comprising:a first arithmetic circuit producing an error signal as a difference between an engine operating parameter signal and a reference parameter value; a controller responsive to said error signal to produce an actuator control signal; a first limiter responsive to said actuator control signal to produce a first actuator drive signal for driving a first actuator associated with a first engine control mechanism to minimize said error signal; and a second limiter responsive to a difference between said first actuator control signal and said first actuator drive signal to produce a second actuator drive signal, said second actuator drive signal driving a second actuator associated with a second engine control mechanism separate from said first engine control mechanism to minimize said error signal when said first actuator drive signal is limited by said first limiter to a maximum first actuator drive signal limit.