Oil control valve to control a cam phaser with a spool positioned by external actuator
US10612430B2 · kind B2 · utility
1Cited by
0References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 2017 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Jul 30, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2303/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil control valve for a cam phaser of an internal combustion engine where the spool is positioned by an external actuator. The pressure enters the end of the oil control valve where the resultant pressure force is balanced by the differential area of the spool. The spool contains two plate check valves enabling cam torque recirculation of oil from A to B or B to A depending upon the spool position. In mid position, the spool lands block A and B to hold the cam phaser position. Three or five positions may be utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.