Control valve for cam phaser and method for mounting the control valve
US11092045B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2020 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Mar 22, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2301/00
- 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 supply tube, a first check valve and a second check valve enabling cam torque recirculation, wherein the control piston device is arranged in the housing and axially movable by an actuator, wherein the first check valve is configured with a first disc portion and a second disc portion and the second check valve is configured with a third disc portion and a fourth disc portion and the first check valves and the second check valve are arranged offset from each other by a compression coil spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.