The invention provides a vehicle exhaust system which comprises an exhaust pipe and a standing wave breaking section, the standing wave breaking section is arranged on the exhaust pipe, the standing wave breaking section and the exhaust pipe jointly form an exhaust passage, and when the exhaust passage exhausts, standing waves with the frequency the same as the resonant frequency of the exhaust passage are generated in the exhaust passage; wherein a through hole is formed in the standing wave breaking section, the interior of the exhaust pipe is communicated with the exterior of the exhaust pipe through the through hole, the standing wave breaking section is arranged to be capable of generating sound waves with the frequency the same as that of standing waves through the through hole, and the position of the standing wave breaking section on the exhaust pipe is staggered from the antinode position of the standing waves. According to the vehicle exhaust system, original standing waves are broken into waves with shorter wavelengths through the standing wave breaking section, so that the resonant frequency of an exhaust passage is avoided, and the purposes of noise elimination and resonance reduction are achieved; meanwhile, the structure is small in size, capable of saving the space of a chassis, simple in structure, difficult to store water and capable of reducing corrosion of a tail pipe of the exhaust pipe.
本申请提供一种车辆排气系统,车辆排气系统包括排气管和驻波打断节,驻波打断节设置在排气管上,驻波打断节与排气管共同形成排气通路,排气通路排气时,排气通路内产生频率与排气通路的共振频率相同的驻波;其中,驻波打断节上开设有通孔,通孔将排气管的内部和排气管的外部连通,驻波打断节被设置成能够通过通孔产生频率与驻波的频率相同的声波,且驻波打断节在排气管上的位置与驻波的波腹位置错开。本申请提供的车辆排气系统,通过驻波打断节将原驻波打断为波长更短的波,从而避开排气通路的共振频率,实现消声和减小共振的目的;同时上述结构体积较小,可以节省底盘空间,而且结构简单,难以存水,降低排气管的尾管腐蚀。
Vehicle exhaust system
车辆排气系统
2025-02-07
Patent
Electronic Resource
Chinese
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 |