Patent ID: 8626422

Claim:
A method of controlling an engine having an electronic oil pump supplying lubricant thereto, the electronic oil pump including an actuator operatively connected to at least one piston, the method comprising: causing the actuator to move the at least one piston toward a full stroke position; sending a first signal to an electronic control unit (ECU) when the at least one piston reaches the full stroke position; determining a time taken to reach the full stroke position based on the first signal; returning the at least one piston to the fully retracted position; sending a second signal to the ECU when the at least one piston reaches a fully retracted position; determining a time taken for returning the at least one piston to the fully retracted position based on the second signal; determining a cycle time of the pump based on the time taken to reach the full stroke position and the time taken for returning the at least one piston to the fully retracted position; and limiting a maximum allowable engine speed based at least in part on the cycle time.