Valve timing drive for an internal combustion engine
US4457269A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Apr 29, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2275/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine camshaft is driven from the crankshaft through a timing chain such that the chain has a taut side and a slack side. A second chain is drive connected between the crankshaft and a sprocket member which is maintained on the camshaft by a one-way device. The second chain has a taut side and a slack side opposite the corresponding sides of the primary timing chain. During the engine operating cycle, a torque reversal occurs at the camshaft. The second chain prevents the torque reversal from loosening or overrunning the taut side of the primary timing chain. The one-way device permits adjustment of the primary timing chain due to wear while maintaining the taut side of the second chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.