Hydraulic valve for a cam phaser

US11300017B2 · kind B2 · utility

Assignee

• ECO Holding 1 GmbH · DE

Inventors

• Udo Diederichs · Ratingen, DE
• Michael Brumm · Heroldstatt, DE

Key dates

• Filing date: Feb 10, 2019
• Grant date: Apr 12, 2022
• Expiry date: Mar 10, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2001/34483
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A hydraulic valve for a cam phaser, the hydraulic valve including a bushing including a piston that is movable in a bore along a longitudinal direction; a supply connection configured to feed a hydraulic fluid; a first operating connection and a second operation connection; and a first tank drain connection and a second tank drain connection configured to drain the hydraulic fluid; and a first check valve associated with the first operating connection and a second check valve associated with the second operating connection, wherein the first operating connection and the second operating connection are connectable through at least one of the first check valve and the second check valve alternatively with each other or with the supply connection or with one of the first tank drain connection and the second tank drain connection by moving the piston, wherein the hydraulic valve includes five switching positions.