Patent ID: 7827967
Filing Date: 2010-11-09
Classification: F02D,F02M

Abstract:
1. An engine assembly comprising: an engine structure defining a combustion chamber; a fuel injector in fluid communication with the combustion chamber; a fuel supply; and a fuel pump assembly including a housing, a reciprocating member, and a solenoid valve assembly, the housing defining an inlet in fluid communication with the fuel supply, an outlet in fluid communication with the fuel injector, and a bypass passage, the reciprocating member being located within the housing to define a compression chamber in fluid communication with the inlet, the outlet, and the bypass passage, the solenoid valve assembly including a valve member located within the bypass passage and displaceable between open and closed positions to selectively provide fluid communication between the compression chamber and the fuel supply during a compression stroke of the reciprocating member, the valve member being in the open position during an entirety of a compression stroke of the reciprocating member to provide a controlled leak path between the compression chamber and the fuel supply through the bypass passage.