Method for compensating for a tank venting error in an adaptive

Details Method for compensating for a tank venting error in an adaptive Method for compensating for a tank venting error in an adaptive

1987-11-20

1989-05-23

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02B 3300

Patent

active

048319929

ABSTRACT:
The invention is directed to a method for compensating for the tank venting error in a learning fuel metering system metering the required fuel quantity to an internal combustion engine. The method includes carrying out the lambda correction with adaptively learned precontrol values also in phases of the tank venting so that the disturbing quantities which are introduced by the tank venting can likewise be learned out; however, the obtained learn values are entered in separate memory locations dependent upon whether they have been determined during the basic adaptation or during the adaptation with tank venting. These learn values are switched to the lambda control as precontrol corrective values in accordance with the time control determining the sequence of the base adaptation phases and tank venting adaptation phases. The invention is also directed to an apparatus for carrying out the steps of the method of the invention.

REFERENCES:
patent: 4377142 (1983-03-01), Oosuka et al.
patent: 4641623 (1987-02-01), Hamburg
patent: 4664087 (1987-05-01), Hamburg
patent: 4677956 (1987-07-01), Hamburg
patent: 4683861 (1987-08-01), Breitkreuz et al.
patent: 4700683 (1987-10-01), Urazaishi et al.
patent: 4741317 (1988-05-01), Yost
patent: 4741318 (1988-05-01), Korge et al.

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