Process and device for controlling the lift of an internal combustion engine valve
US5826551A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | May 6, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention applies to the control of the variable opening and closing of an intake valve. According to the invention, a set-point position (.alpha..sub.c) for an event related to the valve is calculated continuously. Upon the detection of a change in the set-point (.alpha..sub.c) or in the engine speed (N), the establishment of the new set-point is controlled in an open loop during at least the first engine cycle following the detection of the set-point change, and b) the adjustment to the new set-point is controlled in a closed loop during subsequent engine cycles. The control is applied to a mechanism for triggering the event with an advance (AV) on the event. In each open-loop control cycle, this advance is read in a stored table, as a function of the engine speed (N) and the set-point position (.alpha..sub.c)calculated for the event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.