Fuel injection engine

Claim 1

In a four cycle, fuel injection, reciprocating piston, internal combustion engine, camshaft means operating in fixed relation to the operating speed of the engine, injection timing means for timing the injection of a combustible fuel charge into the engine''s combustion chamber, said injection timing means comprising pumping means for forcing said fuel charge into said combustion chamber, a pump-actuating cam lobe on said camshaft means, cam following means coacting with said cam lobe to cause reciprocation of said cam following means with respect to said camshaft means, connecting means between said cam following means and said pumping means for communicating said reciprocation to said pumping means, and manually operably control means for shifting said cam following means to move a cam engaging portion of the latter means to And fro between radially different points of its coaction with said cam lobe and thereby controllably vary the timing of such fuel injection relatively to the cyclic operation of the engine; said pumping means including a springclosed air intake valve and valve control means coacting with said manually operable control means for varying the time of closing of said air intake valve in relation to the varying of timing of the fuel injection; said valve control means comprising a valve opening lobe on said camshaft means, a valve opening arm coacting between the latter lobe and the air intake valve to open the latter, a pivotal locking arm spring-pressed into locking interference with said valve opening arm to hold the latter in valve opening position; secondary camshaft means, intermeshing spiral gears coacting between the two said camshaft means to effect driving of the secondary camshaft means by the other camshaft means, said spiral gear of the secondary camshaft means being slidable axially relatively to the latter to vary the angular relationships of the two said gears, a cam lobe on said secondary camshaft means, engageable with said locking arm to move the latter clear of such locking interference whereby to permit said valve to close; and a yoke portion of said manually operable means in engagement with said slideable gear to effect sliding thereof; the sliding movement of the latter gear by said yoke being proportionate to the mentioned to and fro movement of said cam following means, whereby to coordinate the timing of operation of said pumping means with the timing of closing of said valve.