Patent ID: 9435328
Filing Date: 2016-09-06
CPC Classification: F02M,F04B

Claim Text:
1. Control structure for controlling movement of a high pressure fuel pump piston of a fuel system, the piston being constructed and arranged to be inserted into or withdrawn from a pumping chamber to control a flow of fuel from the pumping chamber, the control structure comprising: a rocker arm with an associated roller follower, the roller follower being constructed and arranged to directly engage a camshaft of an engine, with the roller follower being between the rocker arm and the camshaft, the rocker arm being operatively associated with the piston such that movement of the camshaft causes movement of the rocker arm and thus movement of the piston, and actuator structure associated with the rocker arm and including a control element mechanically engaged with the rocker arm and movable along a path between two endpoints in response to an input to the actuator structure so as to vary a percentage of the camshaft motion imparted to the piston via the rocker arm, according to fuel demand, wherein the control element and camshaft rotate about a common axis and the control element is coupled to the rocker arm via a support pivot, and wherein the path is an arc-shaped path.