Patent · US Expired

Device for the relative angular adjustment of a camshaft

US5012774A · kind A · utility

19Cited by

8References

6Claims

0Family size

Assignee

Daimler-Benz AG · DE

Inventors

Hans-Jurgen Strauber · Stuttgart, DE
Robert Niklas · Waiblingen, DE
Rolf Ohlendorf · Waiblingen, DE
Wolfgang Speier · Jülich, DE

Key dates

Filing date	Mar 1, 1990
Grant date	May 7, 1991
Priority date	—
Expiry date	Mar 1, 2010

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L1/34406
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a device for angularly adjusting an internal combustion engine camshaft in relation to a crankshaft and comprises an adjusting bushing connected to the camshaft, with an input sleeve surrounding said bushing, and with an actuator displaceably arranged there between. An input sleeve, the actuator, and the adjusting bushing are each provided with helical gear teeth to translate axial shifting of the actuator into relative rotation between the camshaft and crankshaft. In order to prevent rattling noises in the gear teeth that are caused by changing moments in the drive of the camshaft, the actuator is guided in stop-free fashion. A stop, which is effective between the input sleeve and camshaft, limits the angular adjustment so that the actuator is stressed between the input sleeve and camshaft to avoid backlash during rattling.

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