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Six-cylinder-in-line turbocharged diesel engine crankshaft torsional vibration characteristics
Published October 17, 2000 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Engine crankshafts have been designed to avoid low-harmonic- order resonant torsional vibration in a commonly-used engine speed range, but the authors have found that, in some engines, especially turbo-charged engines, a significant degree of a low- harmonic-order exciting torque acts on the crankshaft. In these engines, the amplitude of non-resonant low-harmonic-order torsional vibration is almost as large as that of the resonant one. The authors conclude that the 3rd-order non-resonant torsional amplitude is not only significant but also characteristic of the turbo-charged engine in comparison with the naturally-aspirated engine.