Resonators Rochester nstitute of Technology谐振器罗彻斯特理工学院.docVIP

Project # Project Name Project Track Project Family 11221 Noise Reduction for Internal Combustion Engine Vehicle Systems and Technologies N/A Start Term Team Guide Project Sponsor Doc. Revision 2010-1 Ed Hanzlik Dr. Alan Nye A Project Description Project Background: The auto industry is currently increasing the focus on the reduction of noise emitted from a car’s engine. For consumer vehicles it is largely an issue of comfort and convenience but for performance competitions with noise restrictions and requirements, such as the SAE Formula competition, it can be an issue of meeting competition requirements and performance restrictions. The focus of this project is to develop an active, passive, or hybrid mechanical and/or electrical noise inhibiting system with minimal engine performance as degradation. Problem Statement: Most noise inhibition devices for internal combustion engines can severely hamper engine performance. Conventional mufflers and resonators must be tuned to specific engine conditions that do not efficiently dampen or inhibit sounds from the full range of engine loads and conditions. An effective noise reduction system with low performance impact that is cost effective and can reduce sound generated from the full spectrum of engine conditions is desired. Objectives/Scope: Investigate the physics of sound generation and transmission. Identify and locate the major noise contributors in an internal combustion engine. Analyze and model the noise generation of an internal combustion engine. Propose design for noise reduction mechanism. Provide sufficient background to Electrical Engineering team for potential active noise cancellation system. Provide noise reduction demonstrator for Spring 2011 Imagine RIT. Deliverables: Model engine noise (frequencies amplitudes vs RPM) in order to deliver data to the Electrical Engineering Team. Develop a list of constraints that the Electrical Engineering team will need to follow Develop and build a pro