Method and arrangement for adapting the mixture control of an internal combustion engine
US4768490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Aug 20, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1488
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.