公开(公告)号：US3842812A

公开(公告)日：1974-10-22

申请号：US29792872

申请日：1972-10-16

Applicant: MARCUS E

Inventor： MARCUS E

IPC: F01L1/28 ,  F01L9/02 ,  F01L25/06

CPC classification number: F01L9/02 ,  F01L1/285

Abstract: A four-cycle internal combustion engine having an intake and exhaust valve which operate in response to gas pressure generated in the engine cylinder during the operating cycle of the engine, rather than by external cams mounted on a camshaft. Pressure responsive control valves mounted on the cylinder admit fresh charges of air and fuel beneath the piston in the cylinder during its compression and exhaust strokes and the piston pumps these fresh charges back into the cylinder above the piston through the intake valve during the intake stroke, resulting in twice the air charge of a conventional engine. At the end of the power stroke another pressure responsive valve opens to relieve the pressure generated in the cylinder after ignition, to enable gas pressure previously generated in an air chamber above the cylinder and acting on the exhaust valve to open it to expel the burnt charge. The exhaust passage of the engine is also located so as to place the burnt gases in heat exchange relation with the fresh charge to preheat the charge, increasing the thermal efficiency of the engine.