Idling speed control system of internal combustion engine
US5975049A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0402
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine has an auxiliary device incorporated therewith. An idling speed control device of the engine includes a first air amount control device which controls the amount of air fed to the engine in accordance with an operation condition of the engine, a second air amount control device which controls the amount of air fed to the engine when a load of the auxiliary device is being applied to the engine; and an air/fuel varying device which varies an air/fuel ratio of a mixture fed to the engine. A control unit for the idling speed control device includes a judging unit which judges whether the load of the auxiliary device is actually applied to the engine or not; a first deriving unit which derives a corrected air amount which corresponds to a load of the auxiliary device under idling operation of the engine at a stoichiometric air/fuel ration; a second deriving unit which derives a needed air amount needed by the engine when the engine is idling at a target air/fuel ratio; a calculating unit which calculates a difference between the corrected air amount and the needed air amount when the judging unit judges the application of the load of the auxiliary device t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.