Compact camshaft phasing drive
US5163872A · kind A · utility
31Cited by
19References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Sep 5, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2275/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable camshaft phaser (VCP) has lash take up drive piston assemblies with inner and outer helical splines for phase changing and return springs mounted in pockets in the pistons to shorten overall length for a compact unit and also relieve lash take-up friction on the piston return strokes. Numerous other features are included. A three-way feed-discharge valve limits oil flow to that necessary to operate the drive pistons for phasing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.