Patent ID: 7263978

Claim:
A fuel pump for delivering fuel to an internal combustion engine at more than one fuel pressure, the engine having an associated controller controlling operation thereof, comprising: a fuel inlet and a fuel outlet; a motor and a pump assembly for drawing fuel through the inlet into the fuel pump and delivering fuel to the outlet at a pressure higher than the pressure at the inlet, the pump assembly having a slot which is in contact with the fuel and the pump assembly having a circuit board; a processor responsive to an input from the controller to variably control the higher outlet fuel pressure, the processor being mounted on the circuit board positioned within the pump assembly; a pressure sensor sensing the variable pressure of fuel discharged from the pump, the pressure sensor providing another input to the processor for the processor to determine if the higher outlet fuel pressure is a desired fuel pressure wherein the processor continues to variably control the higher outlet fuel pressure to obtain the desired fuel pressure by controlling speed of the motor such that the higher outlet fuel pressure is a function of the speed of the motor; and a transistor electrically connected to the printed circuit board to control the power to the motor, the transistor having a heat sink covering wherein the transistor partially inserts within the slot so that the heat sink is directly exposed to the fuel via the slot such that the contact between the heat sink and the pumped fuel draws heat energy away from the transistor.