Exhaust gas temperature assist for two-cycle uniflow scavenged diesel engine at lower engine loads
US10837385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Sep 7, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of raising exhaust gas temperatures of a two-cycle uniflow scavenged engine at lower loads. At lower loads, the exhaust valves are activated with a frequency that is less frequent than every engine cycle. This retains exhaust within the cylinder for one or more cycles, and when the exhaust valves are again activated, the exhaust temperature will be elevated. For engines having a means for controlling intake manifold pressure, such as a compressor having variable speed or a means for bleeding off compressor output, intake manifold pressure can be reduced at low loads, which also has the effect of elevating exhaust temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.