Internal combustion engine with two-stage supercharging capability and with exhaust-gas aftertreatment arrangement, and method for operating an internal combustion engine

US9903268B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Vanco Smiljanovski · Bedburg, DE
• Helmut Matthias Kindl · Aachen, DE
• Joerg Kemmerling · Monschau, DE
• Franz Arnd Sommerhoff · Aachen, DE
• Franz J. Brinkmann · Hürth, DE

Key dates

• Filing date: Mar 25, 2016
• Grant date: Feb 27, 2018
• Expiry date: May 25, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A supercharged internal combustion engine includes at least two exhaust-gas turbochargers arranged in series, wherein a first exhaust-gas turbocharger serves as a low-pressure stage and a second exhaust-gas turbocharger serves as a high-pressure stage. A second turbine of the second exhaust-gas turbocharger may be present upstream of a first turbine of the first exhaust-gas turbocharger, and a second compressor of the second exhaust-gas turbocharger may be arranged in an intake system downstream of a first compressor of the first exhaust-gas turbocharger and a first bypass line may branch off upstream of the second turbine and join back at a junction point between the first turbine and the second turbine. The supercharged engine also includes an exhaust-gas recirculation arrangement and at least one exhaust-gas aftertreatment system between the first turbine and the second turbine.