Passive engine exhaust flow restriction arrangement
US6526752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/23
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A passive engine exhaust flow restriction arrangement includes a fixed geometry flow restriction mechanism disposed in line with an exhaust conduit. In one embodiment, the flow restriction mechanism is disposed upstream of a turbocharger turbine, and in an alternate embodiment it is disposed downstream of the turbine. In either case, the flow restriction mechanism defines a fixed cross sectional flow area therethrough that is less than the cross sectional flow area of the exhaust conduit. Preferably, the cross sectional flow area of the flow restriction mechanism is sized to optimize one, or both, of turbine efficiency and engine fuel economy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.