Valve train of an internal combustion engine

US11047270B2 · kind B2 · utility

Assignee

• Mahle International GmbH · DE

Inventors

• Patrick Altherr · Stuttgart, DE
• Thorsten Ihne · Stuttgart, DE
• Rolf Kirschner · Eßlingen, DE
• Mario Mohler · Stuttgart, DE
• Markus Walch · Bretten, DE

Key dates

• Filing date: Mar 12, 2020
• Grant date: Jun 29, 2021
• Expiry date: Mar 12, 2040

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 train may include a camshaft, a cam sleeve adjustable in an axial direction between first and second positions and non-rotatably arranged on the camshaft, a first cam and at least one second cam, a pin and at least one cam follower mounted thereon, a guide contour arranged on the cam sleeve and having first and second guide tracks, and a control pin optionally engaging in the first or second guide track to adjust the cam sleeve between the first and second positions. The at least one cam follower in the first and second positions may interact respectively with the first and second cams. On the camshaft or an internal surface of the cam sleeve, first and second snap-in recesses and a third snap-in recess therebetween may be arranged. A snap-in device having a snap-in element preloaded into the snap-in recesses may be provided, the snap-in recess fixing the cam sleeve in the first or second position. The first and second guide tracks may intersect in an intersection region. Between the first and third snap-in recesses and between the second and third snap-in recesses, first and second snap-in humps may respectively be arranged. The snap-in element may engage in the third snap…