Cam phaser locking pin assembly guide
US6742485B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2001/34483
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vane-type cam phaser wherein a locking pin assembly is disposed between a rotor and a stator of the phaser to selectively couple the rotor and stator together under certain operating conditions, for example, during engine start-up. The central axis of the locking pin assembly is disposed in the rotor parallel to the rotational axis of the phaser. The pin is spring loaded in a default position and is guided through its axial movement by two cylindrical guide surfaces—an inner guide surface and an outer guide surface. The lengths of these guide surfaces are optimized to minimize binding and sluggish operation of the pin caused by lateral forces exerted on the pin by the stator when in operation. The outer guide surface to inner guide surface ratio (L/I) is preferably greater than 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.