Two-stroke-cycle engine with variable valve timing

Details Two-stroke-cycle engine with variable valve timing Two-stroke-cycle engine with variable valve timing

F - Mech Eng,Light,Heat,Weapons

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F01L 1/34 (2006.01) F02D 13/02 (2006.01) F02F 1/00 (2006.01) F02B 1/04 (2006.01) F02B 75/02 (2006.01) F02F 1/04 (2006.01)

Patent

CA 2029396

ABSTRACT OF THE DISCLOSURE A two-stroke-cycle spark ignited internal combustion engine operates with an exhaust valve that is controlled independently of crankshaft position and optimally for high power and low pollutant output in combination with a scavenging pump and fuel injector. The volume of combustible mixture is established at the point in the cycle when the exhaust valve is selectably closed with the piston traveling upwardly and decreasing the volume of the cylinder. Throttling losses are eliminated since the piston forces the scavenging air out of the cylinder through the wide-open exhaust valve rather than the air being drawn into the cylinder against the reduced pressure caused by a conventional partially closed throttle plate. The volume of combustible air in the cylinder is determined by the point in the cycle at which the exhaust valve is closed and a correspondingly appropriate charge of fuel is thereafter injected into the cylinder.

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