Air compression four-cycle piston combustion engine

Claim 1

An air compressing four-stroke cycle piston internal combustion engine which includes: cylinder means having inlet valve means and outlet valve means, inlet manifold means leading to said inlet valve means, outlet manifold means communicating with said outlet valve means for discharging exhaust gases discharged through said outlet valve means, said cylinder means being provided with inlet port means spaced from said outlet valve means in the axial direction of said cylinder means, adjustable throttle means interposed in said outlet manifold means for controlling the quantity of exhaust gases passing from said outlet manifold means to and through said inlet port means, conduit means leading from said outlet manifold means into said inlet porT means, piston means reciprocable in said cylinder means and operable to control said inlet port means to permit exhaust gases from said conduit means to enter said cylinder means when said piston means during an exhaust stroke frees said inlet port means, and pump means for delivering fuel to said cylinder means and means responsive to the delivery of said pump means and operatively connected to said throttle means for controlling the latter in conformity with the delivery of said pump means.