Internal-combustion engines – Combustion chamber means having fuel injection only – Injecting diverse fuels or different states of same fuel
Patent
1983-06-28
1985-10-15
Nelli, Raymond A.
Internal-combustion engines
Combustion chamber means having fuel injection only
Injecting diverse fuels or different states of same fuel
123297, 123143B, 123305, F02D 300, F02B 1910, F02B 4508
Patent
active
045467404
ABSTRACT:
An improved ignition system is provided for an internal combustion engine having a combustion chamber and a conventional carburetor system, a conventional fuel injection system or a conventional gas mixing system, for feeding an ambient combustible fuel-air mixture to the combustion chamber. In this system, a high speed injector is fed with a gaseous fuel between a spark gap provided by a spark electrode. The spark electrode projects a predetermined distance into the combustion chamber so that the axis of the injector nozzle passes through the spark gap. A puff in the form of a short, abrupt blast of the gaseous fuel is expelled across the spark to produce a well-defined turbulent plume of the injected gaseous fuel. The time and duration of the electric spark and the fast-acting valve actuator controls the length of time it takes to open the fast-acting valve and the length of time the fast-acting valve remains open. The electric spark occurs after an appropriate predetermined time after the opening of the fast-acting valve, when the gaseous fuel plume in the vicinity of the spark electrode. Then, the ambient fuel-air mixture and the injected gaseous fuel in the combustion chamber are simultaneously ignited. A clear improvement in both ignition and combustion of lean fuel mixtures is thus provided.
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Clements Reginald M.
Pitt Philip L.
Ridley John D.
Nelli Raymond A.
University of Victoria
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