Variable valve drive of an internal combustion engine

US10781757B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Adrian Bilan · Fürth, DE
• Frank Himsel · Herzogenaurach, DE

Key dates

• Filing date: Jul 16, 2019
• Grant date: Sep 22, 2020
• Expiry date: Jul 16, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2820/031
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variable valve drive of an internal combustion engine is provided that includes at least one gas exchange valve, the valve stroke of said gas exchange valve predefined by cams of a camshaft, and by at least one switchable rocker arm. The switchable rocker arm, having a first lever and a second lever, selectively transmits cam lift to the gas exchange valve. The second lever is selectively coupled to the first lever by a coupling. The coupling is activatable by an elongated activation arm on which one leaf spring is disposed for the coupling of the switchable rocker arm. The elongated activation arm is longitudinally displaceable from a locking position to an unlocking position by a linear actuator. A damper mass is disposed or configured to be capable of oscillating on the elongated activation arm and/or on the leaf spring of the elongated activation arm.