Patent ID: 7543568
Filing Date: 2009-06-09
Classification: F02M

Abstract:
1. A fuel system comprising: an auxiliary fuel pump in communication with a fuel source; a fuel pressure amplifier in communication with the auxiliary fuel pump, the fuel pressure amplifier including a piston mechanism having a first side defining a first surface area and a second side generally opposite the first side and defining a second surface area that is less than the first surface area; a first chamber in communication with the auxiliary fuel pump and defining a first fluid volume applying a first fluid pressure to the first surface area based on a pressurized fuel source provided by the auxiliary fuel pump to create a first force on the piston mechanism; a second chamber defining a second fluid volume applying a second fluid pressure to the second surface area to create a second force on the piston mechanism that is less than the first force resulting in displacement of the piston mechanism; a fuel injector in communication with the second fluid volume that provides a pressurized fuel supply to an engine based on the displacement of the piston mechanism; and a control valve system located between the auxiliary fuel pump and the fuel injector and including a valve mechanism displaceable between an open position and a closed position, the auxiliary fuel pump being in communication with the fuel injector when the valve mechanism is in the open position and being isolated from fluid communication with the fuel injector by the valve mechanism when the valve mechanism is in the closed position.