Patent · US Active

Variable lift valve train of an internal combustion engine

US9540970B2 · kind B2 · utility

0Cited by

2References

4Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Markus Popp · Bamberg, DE
Jan Pfannenmuller · Nuremberg, DE

Key dates

Filing date	Feb 18, 2015
Grant date	Jan 10, 2017
Priority date	—
Expiry date	Feb 20, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2013/101
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating an internal combustion engine with a sliding cam valve train that has a cam part (2) with three adjacent cams of different lifts (H, M, L) and a groove-shaped connecting link path with two path sections (S1, S2) that lift in both axial directions of the cam part and are arranged completely one behind the other around the circumference is provided. An actuator (10) selectively couples two actuator pins (7, 8) in the connecting link path, in order to move the cam part. The base position of the cam part should be moved into a desired axial position during the operation of the internal combustion engine through successive coupling of the actuator pins in the connecting link path.

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