An Integrated Numerical Tool for Engine Noise and Vibration Simulation

This article highlights the fact that engineers who design and test anti-lock brake systems (ABS) have been trying to come up with ways to minimize the noise and vibration that drivers hear and feel when they stomp on the brake pedals. The ABS engineers want drivers to do during a panic stop is to let their feet off the brakes. According to the engineers, braking should be the concern, because the less time the driver worries about stopping the car, the more time there is to concentrate on steering it. The mechanical components in both systems are functionally identical, consisting of a brake pedal, a master cylinder and booster, hydraulic lines and fluid, wheel calipers, brake pads, and rotors. In fact, unless the system is actuated by hard braking, ABS acts just like an ordinary disc brake system. Engine noise would only mask the ABS noise reaching the binaural head, which sits inside the passenger compartment where a driver would normally be.

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E41 Reduction of engine noise and vibration by use of crankshaft torsional and bending damper

The Proceedings of Conference of Kyushu Branch ◽

10.1299/jsmekyushu.2011.64.183 ◽

2011 ◽

Vol 2011.64 (0) ◽

pp. 183-184

Author(s):

Kazuhide OHTA ◽

Takaya FUTAE ◽

Koki TAJIMA

Keyword(s):

Engine Noise ◽

Noise And Vibration

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Powertrain noise and vibration simulation with hybrid models

International Journal of Vehicle Design ◽

10.1504/ijvd.2002.002007 ◽

2002 ◽

Vol 29 (1/2) ◽

pp. 149

Author(s):

Kenji Sumi ◽

Kenichi Yamamoto ◽

Ludo Gielen ◽

Luc Meulewaeter

Keyword(s):

Hybrid Models ◽

Noise And Vibration ◽

Vibration Simulation

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Robustness of powertrain mount system for noise, vibration and harshness at idle

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/095440700221600103 ◽

2002 ◽

Vol 216 (10) ◽

pp. 805-810 ◽

Cited By ~ 24

Author(s):

M Qatu ◽

M Sirafi ◽

F Johns

Keyword(s):

Design Of Experiment ◽

Degree Of Freedom ◽

Vehicle Engineering ◽

Engine Noise ◽

Detailed Design ◽

Noise And Vibration ◽

And Performance ◽

Noise Vibration ◽

Six Degree Of Freedom

Noise, vibration and harshness (NVH) has become an increasingly important attribute in vehicle engineering. At idle conditions, customer-perceived NVH is dominated by powertrain NVH. Powertrain NVH can be radiated engine noise or noise (and vibration) transmitted through the powertrain mounting system. This paper discusses the variability in the latter NVH as a function of the variability of the mount stiffness parameters. A simple six-degree-of-freedom model is used in the analysis. A detailed design of experiment studies was conducted. It is concluded that better control of mount stiffness parameters would result in improved prediction and performance of idle NVH.

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