Valve timing control system of internal combustion engine
US6520132B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2002 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Apr 3, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2301/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A valve timing control system of an internal combustion engine has: a drive force conveyer; a cam shaft; a housing rotating integrally with one of the drive force conveyer and the cam shaft; a vane rotor housed in the housing, the vane rotor rotating integrally with the other of the drive force conveyer and the cam shaft; an advanced angle chamber and a retarded angle chamber housed in the housing, and turning the vane rotor with an oil pressure; an oil pressure supply-drain measure; a lock gear; and an unlock gear. A large diameter section of a lock pin and an inner periphery of a pin hole define a first clearance while a small diameter section of the lock pin and the inner periphery of the pin hole define a second clearance, such that the first clearance is larger than the second clearance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.