Air-fuel ratio control system for multicylinder engine
US4703735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1985 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | May 24, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1443
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The plurality of cylinders of a multicylinder engine are divided into first group cylinders and second group cylinders, and first and second exhaust sensors are provided to respectively detect the air-fuel ratios of the intake mixtures fed to the first group cylinders and second group cylinders. The air-fuel ratio for the first group cylinders is controlled in a closed loop by a first integration signal generated based on the output of the first exhaust sensor and the air-fuel ratio for the second group cylinders is controlled in a closed loop by a second integration signal generated based on the output of the second exhaust sensor. One of the first and second integration signals is corrected so that the air-fuel ratios for the first group cylinders and second group cylinders are increased and reduced in phases reverse to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.