Oil control valve for a cam phaser of an internal combustion engine and a cam phaser comprising an oil control valve
US11326703B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Jan 29, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2800/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oil control valve for a cam phaser of an internal combustion engine, the oil control valve including a valve housing, including a first operating connection, a second operating connection, a supply connection, and a tank drain connection configured to drain a hydraulic fluid; a piston assembly, including a piston, a hollow check valve tube, a first check valve and a second check valve configured to provide cam torque recirculation, wherein the piston assembly is arranged in the housing axially displaceable by an actuator, wherein a control chamber is arranged within the piston between the first check valve and the second check valve and wherein a check valve compression spring which closes the first check valve and the second check valve is arranged within the piston between the first check valve and the second check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.