Method and system for variable cam timing device
US10174642B2 · kind B2 · utility
0Cited by
19References
20Claims
0Family size
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Key dates
| Filing date | Mar 7, 2017 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Jul 29, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/043
- 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.