Patent ID: 7370637
Filing Date: 2008-05-13
Classification: F02M

Abstract:
1. A common rail fuel injection apparatus for controlling fuel injection, comprising: a body part defining an interior space and also defining a fuel inlet and a fuel outlet that open respectively into and from said interior space, whereby fuel to be injected in operation of the fuel injection apparatus flows through said interior space, a piston means movable in said interior space alternately towards and away from the fuel outlet, the piston means dividing the interior space of the body part into an inlet chamber into which the fuel inlet opens and an outlet chamber from which the fuel outlet extends, and the piston means and the body part defining a damping space in communication with the inlet chamber, and a spring located in the damping space for urging the piston means towards the fuel inlet, wherein the apparatus provides flow connection between the fuel inlet and the fuel outlet by at least a first flow path that provides continuous flow connection and a second flow path of which the cross-sectional flow area increases when the piston means moves towards the fuel outlet.