Control device for valve system in automobile engine
US5394841A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Oct 27, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2275/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control device for a valve system in which low or high speed cams can be smoothly changed. The control device comprises: a valve system including low and high speed cam selecting means for activating and deactivating intake or exhaust valves; and a control unit for calculating, based on engine operation data, a target engine speed to provide a cam selecting signal to the low and high speed cam selecting means, a variation of the engine speed based on the engine speed data, a corrected target engine speed based on the engine speed variation, target engine speed, and delay time of the operation of the cam selecting means, and activating the cam selecting means at the corrected target engine speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.