Engine retarder hydraulic reset mechanism
US4399787A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Dec 24, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An hydraulic reset mechanism is provided for an engine retarder of the compression relief type. The mechanism senses the force required to hold open an exhaust valve. When this force has decreased substantially from the force required to open the exhaust valve initially, a valve is opened in the hydraulic system to release the hydraulic pressure and permit the exhaust valve to close. The mechanism assures that the engine exhaust valves are closed, or substantially closed, prior to the normal opening of the exhaust valves at the end of the power stroke of the engine without affecting the retarding horsepower produced by the engine brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.