Lubricant oil pump for two-cycle engines

Claim 1

In internal combustion engines comprising cylinder means, piston means disposed in said cylinder means for reciprocating movement, intake means including throttle valve means for introducing combustible air-fuel mixture to said cylinder means, exhaust means including exhaust port means and exhaust passage means for exhausting combustion gas from the cylinder means as exhaust gas; lubricant oil pump means comprising plunger means provided for axial reciprocating movement to displace lubricant oil in accordance with stroke of the axial reciprocating movement, means for effecting said axial reciprocating movement of the plunger means, and control means responsive to a pressure of the combustion gas in said exhaust for controlling the stroke of said plunger means whereby supply of lubricant oil for each engine stroke is increased in response both to an increase in the engine speed and to an increase in the engine throttle valve opening.