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Flow Noise Reduction upon Quick Opening the Throttle
Technical Paper
2001-01-1429
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
With the advance in modularization of engine parts in recent years, there is increased use of plastic-made products in air intake systems. Plastic-made intake manifolds (Fig. 1) provide many advantages including reduced weight, reduced cost, and lower intake air temperatures. However, these manifolds have one disadvantage when compared with conventional aluminum-made intake manifolds, in that they transmit more noise because of their lower material density. For example, plastic intake manifolds of early development often generate flow noise when the throttle is opened quickly. With conventional aluminum intake manifolds, this flow noise had generated, but was not heard. This flow noise is presumed to be generated because of high-speed airflow generated when the throttle is opened quickly, but the mechanism of this noise generation has not been clarified. This paper discusses the mechanism of flow noise generation upon quick opening of the throttle, and the methods devised by the authors that can reduce flow noise.
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Citation
Nakase, Y., Kanehara, K., Ohara, K., Yamamoto, K. et al., "Flow Noise Reduction upon Quick Opening the Throttle," SAE Technical Paper 2001-01-1429, 2001, https://doi.org/10.4271/2001-01-1429.Also In
SAE 2001 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V110-6; Published: 2002-09-15
Number: V110-6; Published: 2002-09-15
References
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