Patent ID: 7066151
Filing Date: 2006-06-27
Classification: F02M

Abstract:
1. In a fuel injection system comprising a pump fluidly connected to an injector nozzle by way of a high pressure conduit in a high pressure side for pressurizing fuel in the high pressure side prior to an injection event, and a control valve fluidly connected between the high pressure side and a low pressure side wherein the injection event occurs by opening the injector nozzle when the control valve is activated and the injection event is terminated by a spill event when the control valve is deactivated, the improvement comprising: a spill chamber with a movable piston, fluidly connected between the high pressure side and the low pressure side, wherein the piston is movable between a first position that provides no change in the volume of the high pressure side and a second position that increases the volume of the high pressure side, and means to hold the piston in the first position until the termination of an injection event, whereby to absorb stored energy in the pressurized fuel during a spill event.