Valve drive for an internal combustion engine

US10711663B2 · kind B2 · utility

Assignee

• Mahle International GmbH · DE

Inventors

• Patrick Altherr · Stuttgart, DE
• Thorsten Ihne · Stuttgart, DE

Key dates

• Filing date: May 14, 2019
• Grant date: Jul 14, 2020
• Expiry date: May 14, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2305/02
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A valve drive of an internal combustion engine may include a camshaft, at least one cam follower, and a hydraulic actuating element. The camshaft may include at least one first cam structured as a brake cam and a second cam structured as an exhaust cam. The at least one first cam may have a reduced cam lift relative to the second cam. The at least one cam follower may be connected to an exhaust valve of the internal combustion engine via a rocker. The hydraulic actuating element may include a plunger that is adjustable to an extended position and a retracted position. When the plunger is in the extended position, the hydraulic actuating element may be operatively connected to the brake cam providing a braking stroke. When the plunger is in the retracted position, the hydraulic actuating element may be operatively disconnected from the brake cam providing a cylinder cutout.