To provide a sound absorbing material for a fuel cell automobile which can reduce air flow noise generated at an area coming contact with outside air in the vicinity of a discharge port of exhaust gas.SOLUTION: A sound absorbing material 10 for a fuel cell automobile is provided at a discharge pipe 1 for discharging exhaust gas from a fuel cell, and is positioned in a downstream side end coming contact with outside air of the discharge pipe 1. A recessed and protruding portion 13 exposed from an inner wall surface 12a of a discharge pipe storage portion 12 into an exhaust gas flow passage 1b of the discharge pipe 1 includes a plurality of protrusions 13a formed so as to protrude orthogonally to a flow direction of the flowing exhaust gas.SELECTED DRAWING: Figure 1
【課題】排ガスの排出口付近の外部空気と接する領域で発生する気流音を小さくすることができる燃料電池自動車用吸音材を提供する。【解決手段】燃料電池自動車用吸音材10は、燃料電池からの排ガスを排出する排出管1に設けられ、排出管1の外部空気と接する下流側端部に位置し、排出管収容部12の内壁面12aから排出管1の排ガス流路1b内に露出する凹凸部13は、流動する排ガスの流動方向に直交するように突出して形成された複数の凸起13aを有する。【選択図】図1
SOUND ABSORBING MATERIAL FOR FUEL CELL AUTOMOBILE
燃料電池自動車用吸音材
2020-09-17
Patent
Electronic Resource
Japanese
IPC: | F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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