Air-fuel ratio control apparatus
US4522180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1983 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | May 4, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1474
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-fuel ratio control apparatus in which air-fuel ratio detecting signal represents air-fuel ratio in a combustion chamber and an integrated amount increased or decreased in relation to the air-fuel ratio detecting signal is calculated from the air-fuel ratio detecting signal on the basis of parameters to correct fuel amount supplied to an intake system on the basis of the integrated amount. The frequency of the air-fuel ratio detecting signal when the air-fuel ratio in the combustion chamber reaches a predetermined value is defined as the basic frequency. To compensate for change with the passage of time in the output characteristics of an air-fuel ratio detecting sensor, said parameter value is corrected so that the frequency of the air-fuel ratio detecting signal becomes the basic frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.