Method and system for variable cam timing device
US9988949B2 · kind B2 · utility
0Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jan 22, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are described for an engine with a cam torque actuated variable cam timing phaser. Phaser positioning control is improved by reducing inaccuracies resulting from inadvertent spool valve and/or phaser movement when the spool valve is commanded between regions. In addition, improved spool valve mapping is used to render phaser commands more consistent and robust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.