Device of controlling the idling speed of an engine
US4432318A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Dec 30, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2011/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine comprising a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. The step motor comprises a rotor and a stator having exciting coils. When the engine is operating in an idling state, the exciting coils are excited for rotating the step motor in a rotating direction wherein the engine speed approaches a desired idling speed. When the engine speed becomes equal to the desired engine speed, the exciting operation of the exciting coils is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.