Corrective feedback technique for controlling air-fuel ratio for an internal combustion engine
US4373187A · kind A · utility
21Cited by
7References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1980 |
| Grant date | Feb 8, 1983 |
| Priority date | — |
| Expiry date | Jul 17, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M7/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fuel control method data used to control the amount of the fuel supply in the previous cycle is corrected in response to the output of an O.sub.2 sensor in a current cycle, and added to or subtracted from the corrected data value as the difference between a value derived from data stored in a map based on the output of a vacuum sensor and engine rotation speed in the previous cycle and a value derived from the data stored in the map based on the output of the vacuum sensor and engine rotation speed in the current cycle. The sum or difference is used as current control data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.