Muffler for exhaust gas from internal combustion engine

Patent · Tue Oct 20 04:00:00 EDT 1987

OSTI ID:5763293

Tanaka, H; Sekiya, M; Uchikawa, F

A muffler for exhaust gas of an internal combustion engine is described comprising: (a) a casing having an inlet and an outlet for receiving an expelling, respectively, the exhaust gas, (b) a cylindrical sound-absorbing body comprising, (i) a first, 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 first 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 first, perforated pipe, (e) at least one partition within the casing defining gas expansion chambers.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4700805
• OSTI ID: 5763293
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
CONTROL
CONTROL EQUIPMENT
DAMPING
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST SYSTEMS
FABRICATION
FLOW REGULATORS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NOISE POLLUTION CONTROL
PLATES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
WASTES