Patent · US Expired

Switchable cam follower

US6164255A · kind A · utility

31Cited by

9References

12Claims

0Family size

Assignee

INA Wälzlager Schaeffler oHG · DE

Inventors

Gerhard Maas · Herzogenaurach, DE
Oliver Schnell · Weisendorf, DE
Michael Haas · Weisendorf, DE

Key dates

Filing date	Sep 23, 1999
Grant date	Dec 26, 2000
Priority date	—
Expiry date	Sep 23, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2305/00
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A switchable cam follower (1) for a valve train (1b) of an internal combustion engine (1c) which is indirectly actuatable via tappet push rods (1a), the cam follower (1) comprising an outer section (2) which encloses an inner section (4) that is axially movable relative thereto, the outer section (2) having a pot-shaped configuration with a bottom (6) which comprises an end (5) for cam contact and separates the inner section (4) from a cam (4a) whereby upon coupling of the sections (2, 4) by a coupling means (23), a high lift of a gas exchange valve (22a) is effected, and upon uncoupling of the sections (2, 4), a zero lift, the cam follower (1) having a relatively simple structure with only a small design space requirement and can be installed in receptions (20a) of the internal combustion engine (1c) as provided hitherto for non-switchable cam followers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.