Patent ID: 7520259

Claim:
A power system, comprising: an engine block forming at least one combustion chamber; a crankshaft rotationally disposed within the engine block; an engine valve operatively connected to the crankshaft to cyclically open and close a fluid passageway; a variable valve actuation device configured to selectively interrupt the cyclical opening and closing movement of the engine valve; a fuel injector operable to inject multiple shots of fuel into the at least one combustion chamber during a single injection event; a sensor configured to sense a rotational speed of the power system and generate a signal indicative of the sensed speed; and a controller in communication with the sensor, the fuel injector,and variable valve actuation device, the controller being configured to: limit the number of shots per injection event in response to the signal; and reduce power supplied to the variable valve actuation device in response to a power available to the controller, the fuel injector, and the variable valve actuation device falling below a predetermined value.