Air-gap-insulated exhaust manifold

US7434390B2 · kind B2 · utility

Assignee

• J. Eberspaecher GmbH & Co. KG · DE

Inventors

• Thomas Nording · Eßlingen, DE
• Thomas Beck · Durchhausen, DE

Key dates

• Filing date: Apr 27, 2005
• Grant date: Oct 14, 2008
• Expiry date: Oct 28, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01N2470/24
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The present invention relates to an air-gap-insulated exhaust manifold (1) of an internal combustion engine, in particular in a motor vehicle, having a collecting line (2) that extends in a longitudinal direction (3), an outlet opening (4) oriented in the longitudinal direction (3), multiple inlet openings (5) oriented across the longitudinal direction (3) and a flange (6) that extends in the longitudinal direction (3) and includes the inlet openings (5), wherein an inside pipe (11) is situated in an outside pipe (10), forming an air-gap insulation, and whereby a gas-carrying outside pipe section (13) is provided in the area of at least one of the inlet openings (5) and leads from the respective inlet opening (5) to an assigned inside pipe inlet (14) which is at a distance from the flange (6). The inside pipe (11) is attached to the outside pipe (10) only in an attachment area (15).