Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1992-08-24
1993-10-26
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
123672, F02M 700
Patent
active
052556611
ABSTRACT:
A flexible fuel vehicle is a vehicle capable of operating on alcohol, gasoline, or any combination of these two fuels. Because of the unique properties of alcohol fuels, modifications to engine operating characteristics are required to compensate for the varying percentage of alcohol in the fuel. A method is provided for determining the percent alcohol content of the fuel in the fuel tank, utilizing the oxygen sensor feedback control loop to sense changes in air/fuel ratio and relay that information to the engine controller so that dependant variables can be adjusted accordingly. The method includes placing the fuel pump in the fuel tank along with a mixed fuel accumulator so that a known and slowly varying percentage of alcohol in the fuel is provided to the engine, especially during open loop operation.
REFERENCES:
patent: 4706629 (1987-11-01), Wineland et al.
patent: 4706630 (1987-11-01), Wineland et al.
patent: 4770129 (1988-09-01), Uriyata et al.
patent: 4989570 (1991-02-01), Kuribara et al.
patent: 5163407 (1992-11-01), Yoshida et al.
Letcher John E.
Nankee, II Robert J.
Calcaterra Mark P.
Chrysler Corporation
Nelli Raymond A.
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