Search for dissertations about: "Drift Och Underhåll."
Showing result 21 - 25 of 129 swedish dissertations containing the words Drift Och Underhåll..
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21. Experimental and multivariate analysis methods for sound quality evaluation of diesel engines
Abstract : Noise control and sound quality analysis are important, since noise has been registered to be a predominant factor in stress and a source of great annoyance. Traffic noise is a problem and a major part of this noise comes from heavy vehicles. READ MORE
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22. Crankshaft speed measurements and analysis for control and diagnostics of diesel engines
Abstract : The increasing demands from governments on the engine manufactures to lower the fuel consumption, lower the exhaust emissions and to reduce the noise have lead to an intensive research in the combustion process. Measurement of the combustion process inside the cylinder is only suitable in laboratory environment due to a number of limitations; the pressure transducer needed to measure the pressure is expensive, difficult to mount in the cylinder and has a limited lifetime that is much shorter than the engine's lifetime. READ MORE
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23. Assessment and control of tonal components in electric vehicles
Abstract : New challenges arise for noise, vibration and harshness (NVH) engineers when electric motors are introduced into cars traditionally powered by internal combustion engines (ICE). The noise signature from an electric traction motor is characterized by speed-dependent high frequency tonal components due to electro-magnetic excitation. READ MORE
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24. Methods for motor noise evaluation and control in electric vehicles
Abstract : Complete vehicle, system and component target setting for noise, vibration and harshness (NVH) are important activities within automotive product development. New challenges arise when electric motors are introduced into cars traditionally powered by internal combustion engines (ICE). READ MORE
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25. Floor vibration : dynamic properties and subjective perception
Abstract : This thesis covers research in the floor vibration field. Although lightweight steel framed constructions have been in focus, many results are applicable to floors in common and to some extent also to vibrations in general. READ MORE