Method and system for controlling the idle speed of an internal combustion engine at variable ignition timing
US4446832A · kind A · utility
14Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1981 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Nov 13, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The idle speed of an internal combustion engine is controlled in response to a variable ignition timing control signal from a microcomputer. The microcomputer derives this control signal as a function of the magnitude of engine speed variation which occurs during engine idle periods to cause the ignition timing to vary quickly in response to a transitory engine load variation. An auxiliary air delivery system may be advantageously incorporated in the idle speed control system to cooperate with the ignition timing control in response to the engine speed variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.