Exhaust double pipe of an internal combustion engine

US4185463A · kind A · utility

Assignee

• Toyota Kidosha Kogyo Kabushiki Kaisha · JP

Inventors

• Toshio Tanahashi · Susono, JP
• Yasuo Fujioka · Toyota, JP

Key dates

• Filing date: Dec 20, 1978
• Grant date: Jan 29, 1980
• Expiry date: Dec 20, 1998

Classification

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

Abstract

An exhaust double pipe used for interconnecting an exhaust manifold with a catalytic converter of an internal combustion engine, comprising an inner pipe and an outer pipe. The outer pipe comprises a first pipe and a second pipe. The outer end of the first pipe is welded to a flange together with one end of the inner pipe. The outer end of the second pipe is welded to another flange together with the other end of the inner pipe. The inner end of the first pipe is directly fitted into the inner end of the second pipe, or is indirectly connected to the inner end of the second pipe via a spacer so as to be able to slide relative to the second pipe.