ENGINE FUEL PUMP DRIVE SYSTEM

摘要

A fuel pump drive mechanism may include a fuel pump rocker arm and a fulcrum member. The fuel pump rocker arm may have a first end defining a cam engagement region and a second end defining a fuel pump engagement region. The fulcrum member may be engaged with the rocker arm and may be displaceable between first and second positions. The fulcrum member may engage the rocker arm at a first location between the first and second ends when in the first position and may engage the rocker arm at a second location between the first location and the second end when in the second position. The rocker arm may provide a first pump stroke for the lifter when the fulcrum member is in the first position and a second pump stroke for the lifter less than the first pump stroke when the fulcrum member is in the second position.