Valve timing control apparatus
US8695548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | May 1, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2001/34433
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A springless check valve enables flow of hydraulic fluid from a supply port toward a corresponding one of an advancing port and a retarding port in a connection passage upon lifting of a valve member from a valve seat and limits flow of the hydraulic fluid from the corresponding one of the advancing port and the retarding port toward the supply port upon seating of the valve member against the valve seat. In a synchronously rotatable member, a drain passage is circumferentially displaced from the drain port, and an advancing passage is placed at a corresponding circumferential position, which coincides with a circumferential position of the advancing port. Furthermore, a retarding passage is placed at a corresponding circumferential position, which coincides with a circumferential position of the retarding port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.