Patent · US Active

Vane-type cam phaser having dual rotor bias springs

US8127728B2 · kind B2 · utility

4Cited by

2References

8Claims

0Family size

Assignee

Delphi Technologies · US

Inventors

Thomas H. Fischer · Wenden, DE
Daniel G. Gauthier · Clarkston, US

Key dates

Filing date	Mar 20, 2009
Grant date	Mar 6, 2012
Priority date	—
Expiry date	May 14, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2001/34483
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A vane-type camshaft phaser for varying the timing of combustion valves including a first torsional bias spring disposed on a cover plate spring guide and grounded to the cover plate and to a slot in a spring retainer to urge the rotor toward an intermediate locking position from any position retarded of the locking position. A second torsional bias spring also anchored to the cover plate and spring retainer urges the rotor in the advance direction over the full range of phaser authority to compensate for added camshaft torque loads imposed by non-valve actuating functions such as driving a mechanical fuel pump.

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