Noise generated by car components has become more noticeable today as cars have generally become quieter. Engineers within the SKF Group have looked at one major car component, power steering units, with the aim of tracking down and reducing the noise generated. Experiments carried out suggest that vibration of the pinion seal is the most common noise source. Two types of elastomer materials used for pinion seals have been tested for noise generation over a range of temperatures, pressures and shaft speeds. As a result, a new criterion has been proposed for the prediction of vibration occurring in seals and other rubber frictional components.
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