Reduction in Exhaust Noise Through Exhaust Valving Modifications Achieved with a Gas Dynamics Simulation Model Nissan Motor Company, Limited

Format:

Conference/Event

Author/Creator:

Takeyama, Satoshi, author.

Conference Name:

International Congress & Exposition (1991-02-25 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1991

Summary:

One of advanced requirements in current high output power engine design, as is seen in a four valve engine, is to reduce the exhaust noise without a reduction in engine performance.In order to examine the relationship between output and exhaust noise level, a gas dynamics simulation model was extended so as to predict the exhaust generated noise. The gas dynamics model used in this study is developed based on a finite difference method in which unsteady compressible flow is solved by two-step Lax-Wendroff method.Using this simulation model, timing changes were found to be effective in reducing the exhaust noise level without showing any trade-off on engine performance.These results were validated by the experiment

Notes:

Vendor supplied data

Publisher Number:

910617

Access Restriction:

Restricted for use by site license