Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1990-04-25
1991-03-19
Wolfe, Willis R.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123668, 123 9011, F02B 2504, F02B 7711, F02D 1302
Patent
active
050001337
ABSTRACT:
In a two-cycle heat-insulating engine of the present invention, each of combustion chambers defined by the lower surface of a cylinder head and a cylinder line has an adiabatic structure, each of exhaust valves is disposed in each exhaust port formed in the cylinder head, an intake valve for preventing the backflow of an exhaust gas is disposed in each intake port formed at the lower part of a cylinder, each of these valves is actuated for opening and closing by electromagnetic force of each electromagnetic valve driving device, and a controller controls the opening/closing timing of the intake and exhaust valves, the valve opening/closing time, etc, in response to detection signals from detection means for detecting the operational conditions of the engine. Particularly when the engine is driven at a low number of revolution, the exhaust valve is opened near the lower dead point so as to exhaust all at once the exhaust gas and to suck the intake air, to limit any thermal influences on the intake air and to prevent the drop of the intake air quantity.
REFERENCES:
patent: 3394686 (1968-07-01), Kreglewski et al.
patent: 4523554 (1985-06-01), Ryu
patent: 4911109 (1990-03-01), Kawamura et al.
patent: 4938179 (1990-07-01), Kawamura
patent: 4955334 (1990-09-01), Kawamura
Isuzu Motors Limited
Moulis Thomas
Wolfe Willis R.
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