Device for controlling the movement of a valve, in particular of an intake valve, of an internal combustion engine
US7984701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2007 |
| Grant date | Jul 26, 2011 |
| Priority date | — |
| Expiry date | Sep 20, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L9/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The device is adapted to control the movement of a valve (1) of an internal combustion engine comprising a stem (1a) which may move in translation through an opening (2a) of a hollow guide body (2) and which ends in a mushroom head (1b) cooperating in operation with a valve seat (12) provided in a wall (13) of the engine head. The valve (1) may move in translation with respect to the hollow guide body (2) between a retracted position and a forward position in which the mushroom head (1b) respectively closes and opens the associated valve seat (12).The control device comprises The arrangement is such that when the electromagnet (3) is de-energised, the valve (1) moves in acceleration towards the open position under the action of the first spring (7) until the action of the latter stops, and then the valve (1) moves in deceleration into the open position under the action of the second spring (8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.