A Study Concerning Booming Noise of a Multi-link Type Variable Compression Ratio Engine
Date Published: 2009-04-20
Paper Number:2009-01-0772
DOI: 10.4271/2009-01-0772
Citation:
Sato, Y., Masahiko, K., and Masayuki, H., "A Study Concerning Booming Noise of a Multi-link Type Variable Compression Ratio Engine," SAE Int. J. Passeng. Cars - Mech. Syst. 2(1):832-840, 2009, doi:10.4271/2009-01-0772.
Author(s):
Yusuke Sato - Nissan Motor Co., Ltd
Kondo Masahiko - Nissan Motor Co., Ltd
Hara Masayuki - Nissan Motor Co., Ltd
There was concern that a variable compression ratio engine fitted with a multi-link mechanism might produce louder booming noise due to the inertial forces caused by the lateral swing of the links. Accordingly, a relational expression between the inherent characteristics of the links was found to counterbalance those forces.
As a result, it was found that a multi-link VCR engine designed on the basis of this link concept showed lower levels of horizontal excitation forces similar to the reduction of vertical forces. This suggests that, even without any add-on devices like a balance shaft, the engine can achieve the same level of booming noise performance as conventional engines. In addition, this new link concept obtained as a result of this study is expected to be effective in reducing higher-order interior noise as well.
See papers presented at SAE World Congress & Exhibition, April 2009, Detroit, MI, USA, Session: CAE Simulation/Test Correlation and Optimization in Automotive Engineering:Vehicle NVH Simulation/Test Correlation and Optimization (Part 3 of 5)
Purchase more technical papers and save! With TechSelect,
you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
Learn more >
