EP 0077230 B1 19850109 - GAS FLOW MODULATION APPARATUS FOR AN EXHAUST SILENCER OF AN INTERNAL-COMBUSTION ENGINE
Title (en)
GAS FLOW MODULATION APPARATUS FOR AN EXHAUST SILENCER OF AN INTERNAL-COMBUSTION ENGINE
Publication
Application
Priority
FR 8119304 A 19811014
Abstract (en)
[origin: ES8307037A1] The muffler comprises a resonator (6) which communicates by way of an outlet orifice (14) with a chamber (5). A flexible valve member (16) regulates the section of the passage through this orifice in accordance with the rate of flow of the gas through the outlet of the resonator under the action, for example, of the pressure prevailing in the resonator. When the running speed of the engine decreases, the valve member reduces the section of the passage through the orifice (16) and modifies the acoustic attenuation in the resonator. The valve member may be controlled by other parameters of the flow of the exhaust gas inside the muffler.
IPC 1-7
IPC 8 full level
F01N 1/02 (2006.01); F01N 1/08 (2006.01); F01N 1/16 (2006.01)
CPC (source: EP US)
F01N 1/02 (2013.01 - EP US); F01N 1/163 (2013.01 - EP US); F01N 1/166 (2013.01 - EP US); F01N 2490/155 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE GB IT NL SE
DOCDB simple family (publication)
EP 0077230 A1 19830420; EP 0077230 B1 19850109; DE 3261850 D1 19850221; ES 516782 A0 19830616; ES 8307037 A1 19830616; FR 2514412 A1 19830415; FR 2514412 B1 19840113; JP S58126414 A 19830727; JP S6323366 B2 19880516; US 4484659 A 19841127
DOCDB simple family (application)
EP 82401704 A 19820920; DE 3261850 T 19820920; ES 516782 A 19821007; FR 8119304 A 19811014; JP 17968882 A 19821013; US 42291982 A 19820924