Hydraulically powered exhaust gas recirculation system
US6412278B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Nov 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulically powered exhaust gas recirculation system for an internal combustion engine includes a hydraulically driven turbine (71) that powers a compressor (72). The compressor (72) pressurizes a portion of the exhaust gas from an internal combustion engine (10) and supplies it to a mixer (40). Another portion of the exhaust gas drives the turbine (21) of a turbocharger (20), which in turn powers a compressor (23) that delivers intake air to the mixer (40). The mixer (40) combines the air and the recirculated exhaust gas and delivers the mixture to the intake manifold (11) of the engine (10). The hydraulically powered turbine (71) may be driven by any of a number of systems, such as the power steering system of an automobile, high pressure oil from a diesel fuel injection system or an auxiliary hydraulic system. The flow of recirculated exhaust gas may be regulated in any number of manners, such as by controlling the pressure and displacement of the hydraulic pump (82) or by a valve (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.