Methods of flexible fuel engine conversions

Details Methods of flexible fuel engine conversions Methods of flexible fuel engine conversions

2007-12-11

2009-10-27

Huynh, Hai H (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S478000, C701S109000

Reexamination Certificate

active

07607422

ABSTRACT:
Methods and apparatus are disclosed for converting and optimizing the fuel system of an internal combustion engine in a pre-existing (used) vehicle to be fuel flexible and thus to operate on a mixture of fuels (like ethanol and gasoline) from a single fuel tank. The conversion includes adding a fuel composition sensor installed in the fuel line and/or adding an exhaust gas oxygen sensor installed in the engine's exhaust in addition to adding an electronic control unit with at least one fuel injector driver circuit for controlling an output signal to at least one fuel injector for controlling the air to fuel ratio of the engine. The electronic control unit can control both engine ignition timing and the air to fuel ratio of the engine based upon the composition of fuel mixture in the fuel tank. The electronic control unit can also control other aspects of engine operation like intake manifold boost for those engines that have turbo or superchargers.

REFERENCES:
patent: 4594968 (1986-06-01), Degobert et al.
patent: 4635608 (1987-01-01), Carroll
patent: 4711223 (1987-12-01), Carroll
patent: 4915084 (1990-04-01), Gonze
patent: 4922862 (1990-05-01), Casacci
patent: 4945863 (1990-08-01), Schmitt et al.
patent: 4955345 (1990-09-01), Brown et al.
patent: 4995367 (1991-02-01), Yamauchi et al.
patent: 5092305 (1992-03-01), King et al.
patent: 5119671 (1992-06-01), Kopera et al.
patent: 5150685 (1992-09-01), Porter et al.
patent: 5179926 (1993-01-01), Ament
patent: 5941217 (1999-08-01), Cheng et al.
patent: 7305939 (2007-12-01), Carlson
patent: 7349790 (2008-03-01), Sremac et al.
patent: 7404397 (2008-07-01), Dobeck
patent: 2005/0273246 (2005-12-01), Griese
patent: 2006/0236976 (2006-10-01), Carlson
patent: 2232794 (1990-12-01), None
patent: 6-288956 (1994-10-01), None

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