Apparatus for correcting amount of fuel injection of internal co

Details Apparatus for correcting amount of fuel injection of internal co Apparatus for correcting amount of fuel injection of internal co

1995-03-13

1996-03-12

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123698, F02D 4114, F02M 2508

Patent

active

054977576

ABSTRACT:
A purge amount is estimated by taking the change of purge amounts of a vapor from a canister side and a fuel tank side into consideration, an amount of fuel injection is corrected by the purge amount so estimated, and air-fuel ratio control is executed with a high level of accuracy. In an apparatus for correcting an amount of fuel injection of an internal combustion engine for purging the vapor directly evaporating from the fuel tank and the vapor emitted from the canister into an intake passage through a solenoid control valve and executing an air-fuel ratio control on the basis of the total purge flow amount, a correction amount of the amount of fuel injection on the tank side, which changes with the vapor supplied directly from the fuel tank into the intake passage through the control valve is calculated and a correction amount of fuel injection on the canister side which changes by the vapor supplied from the canister to the intake passage through the control valve is calculated. The total correction amount of fuel injection after the opening of the control valve changes is anticipated on the basis of the tank side correction amount and the canister side correction amount. Air-fuel ratio feedback control means corrects the amount of injection on the basis of this total anticipated correction amount, and no disturbance occurs in the air-fuel ratio due to purging.

REFERENCES:
patent: 5048493 (1991-09-01), Orzel et al.
patent: 5299546 (1994-04-01), Kato et al.

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