Motorcycle engine with an always spring biased open exhaust valve
US10634035B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 18, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Nov 28, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An adjustable exhaust port 2-stroke motorcycle engine with a center adjustable exhaust valve or a split center adjustable exhaust valves includes a closing fork. The closing fork or closing arm base portion is screwed or bolted to a control rod shaft. At least one spring is disposed between a surface of an engine cylinder and the at least one transverse post of an exhaust valve. A first end of the at least one spring is in contact with the surface of an engine cylinder or a surface fixed mounted to the surface of the engine cylinder, and a second end of the spring is in contact with or linked to the at least one transverse post. The center adjustable exhaust valve or either or both of a split center adjustable exhaust valves is spring biased to an open position by the at least one spring at all times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.