Patent ID: 6752135
Filing Date: 2004-06-22
Classification: F02D,F02M,Y02T

Abstract:
A control valve module for controlling an air/fuel ratio in gaseous-fueled engines operating with a near-stoichiometric air/fuel ratio comprising:a valve module having a valve housing and a valve; an actuator having an actuator housing integral to the valve housing, the actuator controlling movement of the valve; and a control module integral to the actuator housing and having an interface, the control module in communication with the actuator, the control module comprising: comparator means for comparing a signal from a heated exhaust gas oxygen (HEGO) sensor to a target voltage to produce an error signal; actuator control means for commanding the actuator to move the valve from a default position to a new position based upon the error signal and one of a no position dither and steady state feedback strategy, a position dither and steady state feedback strategy, and a position dither and duty-cycle feedback strategy.