Automotive engine control system

Details Automotive engine control system Automotive engine control system

1996-08-12

1998-05-05

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123698, F02M 4100, F02M 3302

Patent

active

057461872

ABSTRACT:
An engine control system computes an average value for an air-to-fuel feedback control based on which the amount of fuel vapors trapped in a canister, a purge air flow rate on the basis of a pressure difference between before and after a canister purge valve and a duty ratio at which the canister purge valve is activated, the amount of purged fuel vapors on the basis of the estimated trapped fuel vapor amount and purge air flow rate based on which the amount of fuel vapors entering into the combustion chamber. During execution of a canister purge, the purged gas flow rate is gradually varied toward a target rate so as to prevent the air-to-fuel feedback control from encountering disturbances.

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patent: 5469832 (1995-11-01), Nemoto
patent: 5469833 (1995-11-01), Hara et al.
patent: 5520160 (1996-05-01), Aota et al.
patent: 5524600 (1996-06-01), Wild
patent: 5546917 (1996-08-01), Osanai et al.
patent: 5558072 (1996-09-01), Harima et al.
patent: 5572980 (1996-11-01), Nakagawa et al.
patent: 5609142 (1997-03-01), Osanai

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