Engine retarder having multiple modes
US7568465B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2008 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Apr 18, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D15/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present disclosure is directed to a method of retarding an engine. The method includes selectively retarding the engine in a first mode configured to produce a first level of retarding at a first intensity of noise by selectively opening at least one exhaust valve between ninety degrees and zero degrees of an engine crank angle prior to top-dead-center of a compression stroke. The method also includes selectively retarding the engine in a second retarding mode configured to produce a second level of retarding at a second intensity of noise by maintaining an opening of at least one exhaust valve throughout the entire compression stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.