Supplementary port for two stroke engine
AssigneeOrbital Engine Company (Australia) Pty. Limited
InventorsStephen John Karay, Kenneth Phillip Seeber
Life of this patent
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Abstract
A two stroke internal combustion engine having at least one cylinder (1) with exhaust port means (5), the engine further including at least one supplementary passage (9) in addition to the exhaust port means (5) for allowing gas flow from the cylinder (1), and control means (7) for controlling the gas flow through the supplementary passage (9) as a function of predetermined operating conditions of the engine wherein the control means allows at least substantially unimpeded gas flow therethrough during a compression stroke of the engine when the engine is at least at idle, low engine loads and/or engine speeds, and/or during engine start-up and at least substantially prevents gas flow therethrough when the engine is at higher engine loads and/or engine speeds.
Claims29
A two stroke internal combustion engine having at least one cylinder with exhaust port means, the engine further including supplementary passage means in addition to the exhaust port means for allowing gas flow from the cylinder, and control means for controlling the gas flow through the supplementary passage means as a function of predetermined operating conditions of the engine, wherein the control means controls the gas flow through the supplementary passage means during a compression stroke of the engine to allow gas flow therethrough at least at idle, low engine loads and/or engine speeds, and/or during engine start-up and prevents gas flow therethrough at higher engine loads and/or engine speeds.
A two stroke internal combustion engine having at least one cylinder with exhaust port means and an exhaust valve for controlling the timing of opening of the exhaust port means, the engine further including supplementary passage means in addition to the exhaust port means for allowing gas flow from the cylinder, the exhaust valve further controlling the gas flow through the supplementary passage means.
A method of controlling a two stroke internal combustion engine having at least one cylinder with exhaust port means, the engine further including supplementary passage means in addition to the exhaust port means for allowing gas flow from the at least one cylinder, and control means for controlling the gas flow through the supplementary passage means as a function of predetermined operating conditions of the engine, the method including controlling the gas flow through the supplementary passage means during a compression stroke of the engine to allow at least substantially unimpeded gas flow therethrough at least at idle, low engine loads and/or engine speeds, and/or during engine start-up and to at least substantially prevent gas flow therethrough at higher engine loads and/or engine speeds.
A method of controlling a two stroke internal combustion engine having at least one cylinder with exhaust port means and an exhaust valve for controlling the timing of opening of the exhaust port means, the engine further including supplementary passage means in addition to the exhaust port means for allowing gas flow from the cylinder, the method including controlling the gas flow through the supplementary passage means by way of the exhaust valve.
Dependencies are inferred from the claim text.