Patent ID: 8744722

Claim:
A method of operating an engine receiving lubricant from an electronic oil pump including an electromagnetic coil comprising: starting the engine; sensing an ambient air temperature; reducing an engine speed limit of the engine when the ambient air temperature is below a predetermined temperature; sensing an engine speed of the engine; sensing a throttle position; determining a cycle time of the electronic oil pump based on the sensed engine speed and the sensed throttle position; determining a time period, the time period being longer than a stroke time of the electronic oil pump, the time period varying based on the cycle time when the engine speed is greater than a predetermined engine speed and the ambient air temperature is less than the predetermined air temperature, the time period being constant regardless of the cycle time when the engine speed is less than the predetermined engine speed and the ambient air temperature is less than the predetermined air temperature; connecting the electromagnetic coil to a power source for the first time period; and disconnecting the electromagnetic coil from the power source for a remainder of the cycle time.