Fuel system with fuel vapor estimating feature

Details Fuel system with fuel vapor estimating feature Fuel system with fuel vapor estimating feature

1995-03-30

1996-09-10

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02M 5100

Patent

active

055535950

ABSTRACT:
A fuel system for feedback controlling an air-to-fuel ratio to maintain an ideally combustible air-fuel mixture includes an evaporation control device, which stores fuel vapors from a fuel tank and purges the fuel vapors stored therein into an intake system, and a fuel vapor evaluation system, which calculates an average of the feedback control parameters, estimates an amount of the fuel vapors stored in the evaporation control means based on the average feedback control parameter, calculates an amount of the fuel vapors replenished into the intake system based on the estimated amount of fuel vapors, and calculates a difference between an amount of fuel necessary for an ideally combustible air-fuel mixture and the replenished amount of fuel vapors. Fuel in an amount equal to the difference is delivered into the intake system.

REFERENCES:
patent: 5143040 (1992-09-01), Okawa et al.
patent: 5257613 (1993-11-01), Monda et al.
patent: 5361745 (1994-11-01), Suzuki et al.
patent: 5404862 (1995-04-01), Ohta et al.
patent: 5423307 (1995-06-01), Okawa et al.
patent: 5474049 (1995-12-01), Nagaishi et al.

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