Control valve for cam phaser and method for mounting the control valve
US10883616B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 2019 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Feb 24, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86702
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control valve for a cam phaser of an internal combustion engine, the control valve including a cylindrical 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 control piston device, including a control piston, a piston shaft, a first check valve, and a second check valve; wherein the control piston device is arranged in the housing and movable by an actuator in an axial direction of the housing, wherein the first check valve is configured with a first piston disc and the second check valve is configured with a second piston disc and the first piston disc and the second piston disc are arranged offset from each other by a torsion spring so that a control chamber is formed between the first piston disc and the second piston disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.