Motorcycle Muffler Design Principles

As a general rule most slip on or muffler only exhaust systems do not require alterations in the fuel delivery but even a bone stock factory motorcycle will benefit from fuel management changes.

Motorcycle muffler design principles.

We consider two basic noise canceling concepts when designing mufflers for b b exhaust systems says boat. Few elements have as large an impact on a motorcycle s design as the exhaust system. Effectively the exhaust helps the engine breathe better but without adding more fuel to compensate for the greater ease with which the engine gets air the ratio of fuel to air becomes. 3 0 exhaust muffler design principles 3 1 basic concepts internal combustion engines are typically equipped with an exhaust muffler to suppress the acoustic pulse generated by the combustion process.

In order to explain the effect of exhaust tuning on performance let s take a quick look at the 4 stroke engine cycle. With the intake valve open the piston travels down the cylinder pulling a fresh air and fuel mixture into the cylinder intake stroke. Transfer transmission or four pole matrix a b c and d depend on the component the basic idea p 1 ap 2 bs 2 u 2 s 1 u 1 cp 2 ds 2 u 2 p 1 s. If you are purchasing a full exhaust system most manufacturers strongly recommend fuel system changes.

2021 moto guzzi v7 first look preview. Design of mufflers and silencers noise and vibration short course the sound pressure p and the particle velocity v are the acoustic state variables any acoustic component 1 2 p 1 u 1 p 2 u 2 for any passive linear component. Depending on which concept you use in muffler design it is going to have a great impact on the tone that the muffler is going to have. It s so much more than a pretty pipe.

Page objectoftheinvestigation 1 theory 3 calculationofmuffleralonglines followedinpreceedingtheory 11 thetests 15 descriptionofapparatus 16 descriptionofliufilerstested 19 datasheet 20 calculationofresults 21 resultsandconclusions 22 curves 25 figures 30. A high intensity pressure wave generated by combustion in the engine cylinder propagates along the exhaust pipe and.