System for controlling air-fuel ratio in an internal combustion engine
US4635200A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 11, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jun 11, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2441
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for controlling the air-fuel ratio in an internal combustion engine provided with a fuel injector. The system has an O.sub.2 sensor for issuing signals on two levels, one corresponding to a high air-fuel ratio, the other to a low air-fuel ratio, and a feedback control device responsive to the signal from the sensor. The feedback control calculates a correction factor for maintaining the air-fuel ratio to a desired value during steady operation and for indicating the deviation in the ratio from the desired value during transient conditions. This deviation is employed to generate a transient correction value which is selected to minimize the deviation during transient conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.