Internal-combustion engines – Charge forming device – Auxiliary air or gas used to inject fuel
Reexamination Certificate
2000-04-17
2001-10-23
Argenbright, Tony M. (Department: 3747)
Internal-combustion engines
Charge forming device
Auxiliary air or gas used to inject fuel
C123S536000
Reexamination Certificate
active
06305363
ABSTRACT:
TECHNICAL FIELD
This invention relates to air-assist fuel injection systems and, more particularly, to such injection systems having ozone enrichment.
BACKGROUND OF THE INVENTION
Air-assist fuel injectors have been proposed to improve the operating efficiency and emissions of internal combustion engines. These devices mix air with a fuel charge that is then injected directly into the engine combustion cylinder. The air-assist improves the atomization and distribution of the fuel charge as it enters the air within the combustion chamber of the cylinder. Air is separately ingested in a normal manner into the engine combustion chamber and may be compressed prior to the air assisted fuel injection.
Many air-assisted fuel injectors are known in the prior art. U.S. Pat. No. 5,353,991 issued Oct. 11, 1994 assigned to General Motors Corp. and U.S. Pat. No. 5,730,369 issued Mar. 24, 1998 assigned to General Motors Corp. are examples of air-assist fuel injectors that might employ the present invention.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved air-assist engine fuel injection system having ozone enrichment.
In one aspect of the present invention, a compressed air stream with ozone enrichment is supplied to an air-assist fuel injector. In another aspect of the present invention, the ozone enrichment is provided downstream of the air compressor. In yet another aspect of the present invention, an ozone generator is positioned in flow relation between an air compressor and an air-assist fuel injector.
In order to provide cleaner and more efficient internal combustion engines, direct injection engines having lean operation at part load conditions are recommended. The present invention provides a highly combustible air/fuel mixture at the ignition source by combining an ozone-enriched air to the air-assist fuel injector of the engine. The introduction of an ozone-enriched air-fuel mixture at the fuel injector enhances the ignitability of the mixture cloud at the source of ignition. This will provide an engine operation with improved efficiency and a reduction in unburned exhaust products of combustion.
REFERENCES:
patent: 4308844 (1982-01-01), Persinger
patent: 5353991 (1994-10-01), DeNagel et al.
patent: 5730369 (1998-03-01), DeNagel et al.
patent: 6230683 (2001-05-01), Zur Loye et al.
patent: 10-205397 (1998-08-01), None
Argenbright Tony M.
General Motors Corporation
Grove George A.
Sedlar Jeffrey A.
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