Combination muffler is more effective than reactive muffler even in small size

Abstract

Insertion loss of muffler mainly depends on proper selection of muffler volume which is proportional to Engine Swept volume. Thus, use of combination muffler is exceptionally rare in car segments (i.e. — low specific output engines) though it is more effective than other two main categories of mufflers namely Reactive and absorptive respectively. Perhaps configure the small volume is difficult to make it combination type muffler. A combination muffler is nothing but a combined application of reactive and absorptive principle for noise reduction in single unit. Authors designed a Combination and a Reactive muffler of same volume for a single cylinder four stroke 8 BHP Diesel Engine and afterward evaluated the performance experimentally through measurement of noise level and Brake Specific Fuel Consumption time of engine. This was done to prove that in small volume designed of combination muffler is possible and it is more effective than Reactive Muffler even in small size.