Method and arrangement for adapting the mixture control of an in

Details Method and arrangement for adapting the mixture control of an in Method and arrangement for adapting the mixture control of an in

1987-08-20

1988-09-06

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123325, 123493, F02D 4130, F02D 3700

Patent

active

047684909

ABSTRACT:
The invention is directed to a method for the adaptation of mixture control for an internal combustion engine which is set up from operating quantities of the engine such as throttle flap angular position .alpha. and rotational speed n. The characteristic field provides a precontrol quantity governing the quantity of fuel to be metered or injected. The method includes the steps of: influencing the precontrol quantity by at least one adaptively changeable corrective quantity (structural adaptation, global adaptation); detecting the negative change velocity (-d.alpha./dt) of the throttle flap position angle (.alpha.); comparing the negative change velocity (-d.alpha./dt) with a predetermined threshold value [-d.alpha./dt(SchAd)]; evaluating a quantity (.DELTA..alpha.) indicative of the throttle flap change in angular position when the threshold value [-d.alpha./dt(SchAd)] is exceeded, the quantity (.DELTA..alpha.) being so evaluated that the mixture adaptation in the precontrol region is inhibited for a predetermined period of time when a corresponding threshold value is exceeded. The invention is also directed to an arrangement for carrying out the above method.

REFERENCES:
patent: 4459962 (1984-07-01), Yamato et al.
patent: 4490792 (1984-12-01), Deutsch et al.
patent: 4599695 (1986-06-01), Deutsch et al.
patent: 4633841 (1987-01-01), Matsuura et al.
patent: 4644923 (1987-02-01), Morita et al.

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