Muffler for exhaust gas from internal combustion engine

Patent · Tue Sep 09 04:00:00 EDT 1986

OSTI ID:5232122

Tanaka, H; Sekiya, M; Uchikawa, F

A muffler is described for exhaust gas of an internal combustion engine comprising, (a) a casing having an inlet and an outlet for receiving and expelling, respectively, the exhaust gas, (b) a cylindrical sound-absorbing body comprising, (i) a perforated pipe having openings formed therein, (ii) a cylindrical porous sound-absorbing material concentrically surrounding the perforated pipe, (iii) and a thin film sandwiched between the perforated pipe and the sound absorbing material, (c) means for balancing the gas pressure between the space which is surrounded by the perforated pipe, the thin film and the sound-absorbing material, and the space surrounding the sound-absorbing material, (d) the cylindrical sound-absorbing body being positioned within the casing to cause the exhaust gas flowing from the inlet to the outlet to pass through the perforated pipe, and (e) gas expansion chambers in the casing positioned to cause exhaust gas passing from the inlet to the outlet to enter at least one of the plurality of gas expansion chambers.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4610329
• OSTI ID: 5232122
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
CONTROL
COVERINGS
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST SYSTEMS
FILMS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MATERIALS
NOISE POLLUTION CONTROL
PIPES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POROUS MATERIALS
POSITIONING
PRESSURE CONTROL
THIN FILMS
WASTES