Fuel control systems and methods for delay compensation

A fuel control system of a vehicle, comprising:

• an equivalence ratio (EQR) delay module that, based on a base EQR request received for a first control loop, sets a delayed base EQR request for a second control loop,
• wherein a first period between the first and second control loops corresponds to a sum of:
• a first delay period of an exhaust gas oxygen (EGO) sensor;
• and
• a second delay period for exhaust to flow from a cylinder of an engine to the EGO sensor;
• a closed loop module that determines a closed loop correction for the second control loop based on:
• the delayed base EQR request for the second control loop;
• an EQR measured using the EGO sensor for the second control loop;
• a first value of the closed loop correction determined for the first control loop;
• and
• a second value of the closed loop correction determined for a third control loop,
• wherein a second period between the second and third control loops corresponds to the first delay period of the EGO sensor;
• a summer module that sets a final EQR request for the second control loop based on the base EQR request for the second control loop plus the closed loop correction for the second control loop;
• and
• a fuel actuator module that controls fuel injection to the engine based on the final EQR request.