Internal combustion engine exhaust gas system

US7921647B2 · kind B2 · utility

Assignee

• VOLVO TECHNOLOGY CORPORATION · SE

Inventors

• Daniel Grunditz · Partille, SE
• Mikael Larsson · Mölndal, SE
• Arne Andersson · Mölnlycke, SE
• Lennart Cider · Timrå, SE
• Edward Jobson · Waltham Cross, GB
• Martin Lunden · Mölndal, SE
• Peter Josza · Handen, SE

Key dates

• Filing date: Jun 29, 2005
• Grant date: Apr 12, 2011
• Expiry date: May 8, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An internal combustion engine exhaust gas system includes an EGR arrangement adapted to lead a first flow of exhaust gas, the EGR flow, from an outlet side of the engine to an inlet side of the engine, an exhaust gas conduit adapted to lead away a second flow of exhaust gas, the exhaust flow, from the outlet side of the engine, and an energy recovering unit, such as a turbo, associated with the exhaust gas conduit. The unit is adapted to recover exhaust gas energy from the exhaust flow. The system includes a heat exchanger adapted to allow heat exchange between at least a part of the EGR flow and at least a part of the exhaust flow, the heat exchanger being associated with the exhaust gas conduit at a position downstream the energy recovering unit.