Method and apparatus to provide engine compression braking
US6705282B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Jul 25, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D13/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In internal combustion engines that use hydraulic-fluid actuated fuel injectors, enhanced engine compression braking can be realized with simplified hydraulic control systems, by using fuel injector hydraulic fluid to open exhaust valves at or near the top of a compression stroke. Opening the exhaust valves at the top of a compression stroke wastes compressed gas to the atmosphere providing enhanced efficiency of engine compression braking. Using existing fuel injector high pressure fluid or engine oil to actuate a slave piston and thereby actuate the exhaust valve obviates the need for a separate, dedicated high-pressure oil delivery system for engine compression braking purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.