Air-fuel ratio controlling method and apparatus therefor
US4348728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1980 |
| Grant date | Sep 7, 1982 |
| Priority date | — |
| Expiry date | Jun 11, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2493
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The air-fuel ratio of a mixture to be supplied to an engine is corrected by a microcomputer in accordance with integrated data produced by the process of integration performed in response to the output signal of an air-fuel ratio sensor for sensing the composition of exhaust gases from the engine and engine condition correction data corresponding to the then existing engine operating conditions. The necessary engine condition correction data are stored in the form of a map in a nonvolatile memory in accordance with the engine operating conditions as parameters. If, for example, any abnormal condition such as an abnormal rise in the temperature of a catalytic converter occurs, all the engine condition correction data in the nonvolatile memory are reset to a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.