Browse Publications Technical Papers 2013-32-9164

Development of Intake Sound Control Technique for Sports-Type Motorcycles 2013-32-9164

Engine sound is one of the most important factors when selecting a motorcycle from various models. Therefore, it is necessary to create an appealing sound in the rider's ears in addition to complying with noise regulations. In this paper, how we control intake sound is described through the study of a sports-type motorcycle with an inline 4 cylinder engine. To control intake sound, both intake pressure pulsations generated by the engine and acoustic transfer characteristics of the intake system are important. It is shown by unsteady-state one-dimensional computational fluid dynamics analysis that specifications of the exhaust system affect intake pressure pulsations across the valve overlap period. Therefore, to emphasize high order components of the engine revolutions in the intake sound, for example, modifying the layout of the exhaust muffler is effective. Next, acoustic transfer characteristics from the air cleaner box to the rider's ears of the motorcycle are investigated by acoustic tests based on the reciprocity principle. We try tuning these acoustic transfer characteristics by controlling resonance in the air cleaner box by means of finite element analysis. And, it is illustrated experimentally that the sound in the rider's ears is created as intended by modifying the air cleaner box. As a result, it is shown that intake sound can be designed effectively by the proposed method.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Development of a Thermal Model within a Complete Vehicle Simulation for Motorcycles and Powersport Applications


View Details


Evaluation Method for Motorcycle Mode Fuel Consumption using a One-Dimensional Engine Simulation


View Details


Study on Airbag Concept for Motorcycles Using Opposing Vehicle as Reaction Structure


View Details