Fuel injection timing system for unit injectors
AssigneeTiming Systems, Inc.
InventorsMichael J. Devine, Robert L. Kiliz
Life of this patent
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Abstract
Start of fuel delivery for a fuel-injected engine having separate unit injectors is adjusted by effecting a positional adjustment of camshaft lobes on a camshaft. The camshaft is used to operate the unit injectors, as well as control exhaust valve operations. By separately controlling the position of the cam lobes which operate the unit fuel injectors, a change it start of fuel delivery is effected. A change in relative position of the cam lobes is accomplished by shifting a guide rod within a hollow body of the camshaft. The change in position of the guide rod, in turn, effects a change in position of the cam lobes which are connected to the guide rod.
Claims15
A fuel injection timing system for controlling fuel delivery by cam-operated unit injectors, comprising:
- an elongated, tubular camshaft body that in use rotates about a longitudinal axis;
- at least one cam having a cam body supported on and encircling the camshaft body and a lobe on the cam body, said cam body being rotatable in position on the camshaft body, for moving the lobe in position about the longitudinal axis;
- and
- a longitudinally movable position control rod within said camshaft body which engages the cam body and causes the cam body to rotate in position on the camshaft body, about the longitudinal axis, in response to longitudinal movement of the position control rod relative to the camshaft body, for effecting a relative timing change between the cam lobe and the camshaft body.
Dependencies are inferred from the claim text.