Internal-combustion engines – Noncompression
Patent
1976-02-23
1978-06-13
Feinberg, Samuel
Internal-combustion engines
Noncompression
123122E, 123133, F02M 3108
Patent
active
040942759
ABSTRACT:
A fuel delivery system for an internal combustion engine is disclosed. The system includes primary and auxiliary heating means for vaporizing a liquid fuel, vapor storage means, carburetor means including metering venturi means for mixing the vaporized liquid fuel with atmospheric air to provide a combustible air/fuel mixture and means for controlling the delivery of vaporized fuel to the carburetor means. The carburetor means may be connected to a conventional internal combustion engine intake manifold for eventual delivery of the combustible mixture to the combustion chambers of the engine. The vaporized liquid fuel delivery means of the system includes a variable orifice vapor delivery nozzle for modulating the vaporized fuel content of the air/fuel ratio of the combustion mixture.
The auxiliary heating means are operative to provide an initial supply of vapor to a vapor reservoir upon start-up of the internal combustion engine. Normal vaporization is provided by the primary heating means which include a vapor producing heat exchanger situated within the exhaust gas stream of the internal combustion engine to utilize waste heat from the exhaust gases to produce normal running vapor. The vapor so formed is stored in the vapor reservoir and is delivered under vapor pressure pressurization to the vapor delivery nozzle. The vapor reservoir includes a condensed fuel collection and return passage to return condensed liquid fuel to a fluid reservoir. The heating means are serially communicated to a source of liquid fuel through a coarse metering valve. The quantity of vapor within the reservoir is controlled by electrically sensing the amount of vapor within the reservoir and by electrically controlling the coarse metering valve to maintain a desired level of vapor within the reservoir. Liquid fuel is drawn from a conventional fluid reservoir such as a vehicle fuel tank and is heated to cause vaporization.
The carburetor means is provided with a swirl inducing section arranged to be noncontactive with the vapor stream for promoting turbulent mixing of the vapor stream with ingested air at a point downstream from the swirl inducing means. The swirl so induced inhibits direct contact of the vaporized liquid fuel with the intake manifold prior to mixing. An electrical control system responsive to a variable resistance exhaust gas partial pressure of oxygen sensor is arranged to control the vapor fuel delivery nozzle through servo mechanism control of the variable orifice of the vapor delivery nozzle.
REFERENCES:
patent: 3738334 (1973-06-01), Farr
patent: 3765382 (1973-10-01), Vandenberg
patent: 3948229 (1976-04-01), Knapp et al.
Auiler James E.
Hamburg Douglas R.
Hyland James E.
Moyer David F.
Benziger Robert A.
Feinberg Samuel
Ford Motor Company
Zerschling Keith L.
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