Selected aspects of modeling mufflers for exhaust systems of vehicles

• Autorzy: Gągorowski A. , Melon A.
• Języki publikacji: EN

Abstrakty

EN

The world used several solutions exhaust systems of motor vehicles. Today, in addition to the core function of which is to discharge exhaust gases from a combustion engine and noise reduction, these systems must comply with the functions associated with aftertreatment and impact on the characteristics of the engine. Requirements increase for noise suppression, at the tendency to increase engine efficiency and reduce fuel consumption. On the other hand, it seeks to reduce production costs. All this forces the search for new solutions and improve existing ones. In the process of the combustion gases discharge it is also important to eliminate frequency bands especially harmful to people and the environment (including other living organisms). Our goal is to develop a new design muffler of exhaust system that will meet these expectations of producers and users of vehicles. For this purpose, mathematical analysis of a classical systems with circular holes in the perforated pipes and proposed by the authors of the longitudinal gaps systems was performed. The paper presents some aspects of mufflers modeling for reducing acoustic noise emitted from the vehicle. Basic criterion for assessing was therefore the damping effect. Built theoretical models have allowed a rough estimate of acoustic performance at specific frequency bands by determining the transfer impedances. Because the noise reduction in automobiles is a complex, for the construction of such systems one of the important elements is to eliminate these frequency bands of acoustic waves in the process of the exhaust gases discharge which are the most dangerous to humans. The comparative analysis of these systems has allowed to determine the direction of further structural changes.

Słowa kluczowe

EN

vehicles; noise reduction; exhaust system; mufflers; efficiency of attenuation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 2
• Strony: 97--103
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Gągorowski A.

• Warsaw University of Technology Faculty of Transport Koszykowa Street 75, 00-662 Warsaw, Poland tel.: [phone], fax: [phone]

autor

Melon A.

• Mag-Sport firm Jagiellonska Street 50a/5, 33-300 Nowy Sącz, Poland tel.: [phone]

Bibliografia

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