Automotive engine idle speed control device
US4823750A · kind A · utility
11Cited by
5References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 10, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Dec 10, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M3/075
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Automotive engine idle speed control device meters the flow rate of air supplied to the engine bypassing an intake pipe thereof during engine idle operation to thereby control the engine idle speed. An actuating vacuum is produced in accordance with an electrical signal and acts on a diaphragm fixed to a valve movable with the diaphragm to meter the bypass air flow. To cancel any external force acting on the valve, adjusting means is provided to control the vacuum on the diaphragm independently of the electrical signal to displace the diaphragm in a direction opposite to the direction of action of the external force on the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.