Non-linear torsional vibration characteristics of an internal combustion engine crankshaft assembly

2012 ◽  
Vol 25 (4) ◽  
pp. 797-808 ◽  
Author(s):  
Ying Huang ◽  
Shouping Yang ◽  
Fujun Zhang ◽  
Changlu Zhao ◽  
Qiang Ling ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Torsional Vibration ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Vibration Characteristics ◽  
Non Linear ◽  
Engine Crankshaft

scholarly journals Mechanical features of the combustion engine electric starting system

2018 ◽  
Vol 19 (6) ◽  
pp. 661-668
Author(s):  
Józef Pszczółkowski
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Diagnostic Process ◽  
Total Resistance ◽  
System Operation ◽  
Factors Influencing ◽  
Resistance Torque ◽  
The Moment ◽  
Engine Crankshaft

Engine crankshaft driving by the starter is characterised as a diagnostic process. The article discusses the working conditions of the electric starter when driving the engine crankshaft in terms of the equilibrium of the engine resistance torque and the moment of force generated by starting system. The resistance sources in the internal combustion engine were characterized and factors influencing them were discussed, its components and dependencies allowing for their determination were indicated. The variability of the engine resistance torque in the cycle of its operation as well as the variability of the torque and rotational speed of the crankshaft in the process of propelling the shaft are indicated. The stand and the methodology for testing the engine's internal combustion engine and the influence of the temperature and power of the starting system on registered start signals are presented. The cause and effect relationships of the engine resistance torque and the features – parameters of the starting system operation were indicated. It was shown that the values of signals recorded during the crankshaft driving have the features of engine diagnostic parameters in the aspect of the combustion chamber tightness and the total resistance of the internal combustion engine.

The Effect of the Damping of the Throws on the Torsional Vibration of the Crankshaft System of an Internal Combustion Engine

1929 ◽  
Vol 33 (227) ◽  
pp. 1086-1087
Author(s):  
J. Morris
Keyword(s):  
Internal Combustion Engine ◽  
Torsional Vibration ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Moment Of Inertia ◽  
Torsional Stiffness ◽  
Direct Drive ◽  
Polar Moment ◽  
R Ratio ◽  
Image Position

In the Journal for October, 1923, I gave the following formulæ for the frequencies in torsional vibration of the crankshaft system (see Fig. 1) of a direct drive engine having equal throws and equal journals, viz.:—1and2where3c=torsional stiffness (the CI/L) of an “equivalent journal”;p=polar moment of inertia of the “equivalent pulley” of a throw;r=ratio of the torsional stiffness of the shaft between the airscrew and the first “ equivalent pulley,” to that of an “ equivalent journal “;n=number of throws.

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