Evaporative fuel processing apparatus of internal combustion eng

Details Evaporative fuel processing apparatus of internal combustion eng Evaporative fuel processing apparatus of internal combustion eng

1997-05-14

1998-07-14

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123674, F02M 3704, F02M 4114

Patent

active

057788596

ABSTRACT:
An upper limit value of a target purge rate is set as a maximum purge rate PGRMAX, taking stability of air-fuel ratio control into consideration. On this occasion, in addition to time upper-limit purge rate PGTGT, full-opening purge rate PG 100, and limit purge rate PGLMT as maximum purge rates based on an amount of vapor desorbing from the canister, tank vapor purge rate PGTANK is obtained as a maximum purge rate based on an amount of vapor introduced directly from the fuel tank (steps 701 to 704). Then a minimum value is set as the maximum purge rate PGRMAX out of these upper limit values of the respective purge rates (step 705).

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patent: 5626122 (1997-05-01), Azuma
patent: 5676118 (1997-10-01), Saito
patent: 5682862 (1997-11-01), Sato et al.

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