Method of controlling the idle rotational speed of an internal combustion engine
US4461253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1982 |
| Grant date | Jul 24, 1984 |
| Priority date | — |
| Expiry date | Sep 15, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2011/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The idle air flow to an engine is increased or decreased in response to a control signal which is produced by comparing actual engine speed with a desired idle speed. Whether the above increase or decrease operation is continuously repeated more than a certain times is discriminated. If it is repeated more than the certain times, whether the variation of the engine speed during the above continuous increase or decrease operation is less than a predetermined value is discriminated. When the engine-speed variation during the above increase or decrease operation is less than the predetermined value, the idle speed control operation is inhibited from being executed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.