Diagnostic system for valve actuation mechanism
US7698935B2 · kind B2 · utility
16Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2007 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | May 26, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/221
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A diagnostic system for an engine includes a pressure monitoring module that determines a plurality of first average pressure values and a plurality of second average pressure values of a fluid supply provided to a camshaft phaser. A diagnostic module identifies one of a plurality of cylinders associated with a failed variable valve lift mechanism based on the first and the second average pressure values. Each of the first and the second average pressure values respectively correspond to each of the plurality of cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.