Method and a device for engine braking a four stroke internal combustion engine
US6418720B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Aug 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method and an arrangement for engine braking a four-stroke internal combustion engine. The engine has for each cylinder (2) at least one inlet valve (7) and at least one exhaust valve (9) for controlling communication between a combustion chamber (5) in the cylinder (2) and an inlet system (8) and an exhaust system (10) respectively. In accordance with the invention, the arrangement also establishes communication between the combustion chamber (5) and the exhaust system (10) in conjunction with the exhaust stroke and also when the piston (3) is located in the proximity of the its bottom-dead-center position after the inlet stroke and during the latter part of the expansion stroke. Communication of the combustion chamber (5) with the exhaust system (10) is effected upstream of the throttling device (13) provided in the exhaust system, this throttling device being operative to at least maintain the flow though exhaust system (10) during an engine braking operation, therewith not cause an increase in the pressure upstream of the throttling device (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.