Fuel delivery control apparatus for engine operable on gasoline/

Details Fuel delivery control apparatus for engine operable on gasoline/ Fuel delivery control apparatus for engine operable on gasoline/

1990-10-05

1992-02-25

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123 1A, 123494, 123479, 12317917, F02D 4104, F02D 4114

Patent

active

050903896

ABSTRACT:
A fuel delivery control apparatus for use with an engine operable on either of gasoline fuel and gasoline/alcohol fuel blend. The amount of fuel metered to the engine is controlled based upon engine operating conditions. A first correction factor is set at a value calculated based upon a signal from an alcohol concentration sensor to correct the amount of fuel metered to the engine. A second correction factor is set based upon a signal from an oxygen sensor to correct the amount of fuel metered to the engine so as to provide an air/fuel ratio feedback control. In the event of failure of the alcohol concentration sensor, the first correction factor is estimated by modifying it based upon the signal from the oxygen sensor and a difference between the calculated and estimated values of the first correction factor is calculated. The first correction factor is set at the estimated value when the calculated difference is out of a predetermined range and at the calculated value when the calculated difference is within the acceptable range.

REFERENCES:
patent: 4391253 (1983-07-01), Ito
patent: 4495930 (1985-01-01), Nakajima
patent: 4546732 (1985-10-01), Mae et al.
patent: 4706629 (1987-11-01), Wineland et al.
patent: 4706630 (1987-11-01), Wineland et al.
patent: 4945880 (1990-08-01), Gonze et al.
patent: 4957087 (1990-09-01), Ota
patent: 4967714 (1990-11-01), Inoue

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