Search Results

Current technology, especially in our dynamic industry, demands more reliable and up-to-date information in order to operate efficiently. Data of many kinds, from many sources, must be collected, analyzed, and rapidly transmitted into information which can be used to optimize performance and improve our product. To meet these needs in production diesel engine testing, a process control system has been developed around the basic objective of establishing an accurate and regimented test program, which will provide more reliable information for analysis and action, increased test capacity, accurate history data, and a higher quality product. This paper describes the basic design of such a system, the advantages to be gained, and the overall operation.

This paper describes the procedures used to reduce the tonal noise of a class eight truck engine timing gear train that was initially found to be objectionable under idle operating conditions. Initial measurements showed that the objectionable sounds were related to the fundamental gear mesh frequency, and its second and third harmonics. Experimental and computational procedures used to study and trouble-shoot the problem include vibration and sound measurements, transmission error analysis of the gears under light load condition, and a dynamic analysis of the drive system. Detail applications of these techniques are described in this paper.