Modal Content of Heavy-Duty Diesel Engine Block Vibration

971948

05/20/1997

Event
SAE Noise and Vibration Conference and Exposition
Authors Abstract
Content
High-fidelity overall vehicle simulations require efficient computational routines for the various vehicle subsystems. Typically, these simulations blend theoretical dynamic system models with empirical results to produce computer models which execute efficiently. Provided that the internal combustion engine is a dominant source of vehicle vibration, knowledge of its dynamic characteristics throughout its operating envelope is essential to effectively predict vehicle response.
The present experimental study was undertaken to determine the rigid body modal content of engine block vibration of a modern, heavy-duty Diesel engine. Experiments were conducted on an in-line six-cylinder Diesel engine (nominally rated at 470 BHP) which is used in both commercial Class-VIII trucks, and on/off-road military applications. The engine was mounted on multi-axis force transducers in a dynamometer test cell in the standard three-point configuration. Standard modal analysis techniques were exploited to determine i) the rigid body modal characteristics of the engine block, and ii) the engine mount force signatures of the six rigid body vibration modes of the engine block. Modal content of the firing engine and its relevance to vehicle simulation is discussed.
Meta TagsDetails
DOI
https://doi.org/10.4271/971948
Pages
10
Citation
Winton, D., and Dowling, D., "Modal Content of Heavy-Duty Diesel Engine Block Vibration," SAE Technical Paper 971948, 1997, https://doi.org/10.4271/971948.
Additional Details
Publisher
Published
May 20, 1997
Product Code
971948
Content Type
Technical Paper
Language
English