Connection between a shaft end of a gas exchange valve in an internal combustion engine and a sleeve-shaped control piston on a tappet

US6729287B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Uwe Hammer · Hemmingen, DE
• Sevan Tatiyosyan · Sersheim, DE
• Volker Beuche · Stuttgart, DE
• Peter Lang · Gelnhausen, DE
• Stefan Reimer · Markgröningen, DE

Key dates

• Filing date: May 23, 2003
• Grant date: May 4, 2004
• Expiry date: May 23, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/7069
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A connection between a shaft end of a gas exchange valve of an internal combustion engine and a sleevelike actuating piston of a valve actuator, has at least two shell-like key pieces, surrounding the shaft end and on whose radially outer circumferential surface there is a conically tapering portion, pointing away from a combustion chamber of the engine, and extending in complementary fashion to the cone angle of a radially inner conical portion of a conical fastening sleeve that includes the key pieces, and the conical fastening sleeve and the key pieces can be braced axially against one another. Protrusions and recesses engaging one another are provided on the radially inner circumferential surface of the key pieces and on the radially outer circumferential surface of the shaft end of the gas exchange valve. The conical fastening sleeve is formed by the actuating piston and the actuating piston and the key pieces have threaded portions that can be screwed into one another.