Combustion state control apparatus for internal combustion engine
US5361745A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Jul 12, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for controlling an engine operation such as EGR rate for an internal combustion engine is disclosed with an air/fuel mixture ratio control. In the control apparatus, a variable representing a characteristic of a combustion state in the engine is detected and a difference of the combustion state variable, a target value is averaged for each rich/lean period T determined from the variation of a feedback correction coefficient so that a basic EGR (Exhaust Gas Recirculation) rate determined according to the engine operating condition is corrected on the basis of the average value to derive a final EGR rate. Thus, the variation in the EGR rate cannot be amplified or incremented even when the variation in the combustion state variable occurs due to the influence of the variation in the air/fuel mixture ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.