Air-fuel ratio control system based on adaptive control theory for internal combustion engines
US5797384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Feb 21, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/1433
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-fuel ratio control system for an internal combustion includes an air-fuel ratio sensor arranged in the exhaust system, and an ECU which controls an amount of fuel to be supplied to the engine in a feedback manner based on an output from the air-fuel ratio sensor by using an adaptive controller of a recurrence formula type, such that the air-fuel ratio of an air-fuel mixture supplied to the engine becomes equal to a desired air-fuel ratio. Deterioration of a response characteristic of the air-fuel ratio sensor is detected based on at least one adaptive parameter used in the feedback control of the amount of fuel to be supplied to the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.