Internal-combustion engines – Igniters
Patent
1976-01-05
1978-02-28
Freeh, William L.
Internal-combustion engines
Igniters
123 32AE, F02P 2100
Patent
active
040759962
ABSTRACT:
To increase the fuel efficiency and decrease the emissions of current types of internal combustion engines by improving the burning of leaner fuel mixtures, a novel igniter is provided for each combustion chamber of the engine. The igniter comprises a small external chamber into which small charges of auxiliary fuel are valved, mixed with air, and then rapidly compressed to ignition temperature by a miniature piston or ram. From each of these external chambers a small orifice leads to its corresponding engine combustion chamber. The small size of the orifice restricts the exit flow into this engine combustion chamber of the auxiliary air/fuel mixture, permitting effective compression by the rapid action of the ram. The orifice may be so shaped that the limited amount of auxiliary air/fuel mixture which passes through it prior to ignition is ultrasonically mixed and shaped in order to provide, upon ignition, a geographically desirable flame pattern in the engine combustion chamber which effectively ignites the lean main charge. The igniter compression chamber may be of small volume, e.g. 1 cc. Its piston or ram may be actuated by solenoid means with reasonable electric power consumption. Auxiliary fuel may be valved to these chambers by low-pressure electrically actuated fuel injection valves of known type. The system may be manufactured as a retrofit kit for existing engines, in which case the external compression igniter assemblies may be screwed into the spark plug holes as the spark plugs are no longer required.
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Fleming Lawrence
Freeh William L.
Koczo, Jr. Michael
LandOfFree
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