Actuator unit having two actuator pins

US8596237B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Oliver Popp · Hirschaid, DE
• Ronny Gunnel · Puschendorf, DE

Key dates

• Filing date: Jun 21, 2012
• Grant date: Dec 3, 2013
• Expiry date: Jun 21, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49293
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An internal combustion piston engine having gas exchange valves actuated by cams of a camshaft. The cams are sliding cams having two cams per sliding cam unit situated on a basic shaft in rotationally fixed fashion but axially displaceable. At least one actuator unit has two actuator pins for displacing the sliding cam units into different axial positions using displacement grooves on the circumference of the sliding cam units, the grooves being helical and situated mirror-symmetrically, and having an ejection ramp for the actuator pins. The actuator pins are spring-loaded toward the sliding cam unit and, in retracted positions, can be fixed by arresting devices, which have control needles that correspond to clamping bodies of locking devices. These needles are actuatable by an electromagnet unit, with the control needles being connected with a needle bridge. A pin engages the needle bridge, and the pin is controlled by the electromagnet unit.