scholarly journals Study on the Effective Viscosity of Working Oil in Viscous Torsional Vibration Damper of Diesel Engine

1983 ◽  
Vol 18 (12) ◽  
pp. 975-981
Author(s):  
Shoichi Iwamoto ◽  
Tohru Yonezawa ◽  
Yasunori Mukawa
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Effective Viscosity ◽  
Vibration Damper

Research on the Method of Circumferential Spring Dual Mass Flywheel Damper Matching with Diesel Engine

2009 ◽  
Vol 419-420 ◽  
pp. 65-68
Author(s):  
Zheng Feng Jiang ◽  
Lei Chen
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Torsional Stiffness ◽  
Vibration Damper ◽  
Passenger Car ◽  
Inertia Coefficient ◽  
New Type ◽  
Working Principle ◽  
Relationship Of ◽  
The Relationship

As a new type of torsional vibration damper, a Dual Mass Flywheel (DMF) has different configuration and working principle from the traditional clutch. Focusing on the problem of matching DMF with a diesel engine, the relationship of circumferential spring dual mass flywheel (CS-DMF) and gearbox is analyzed based on a multi-freedom model, and then the methods of gearbox selection, rotary inertia coefficient ascertain and optimization of torsional stiffness are proposed in this paper. The methods have been applied to a CS-DMF matching with a passenger car with diesel engine. Modal simulation and torque fluctuating experiment show the CS-DMF has excellent damping performance.

scholarly journals Characteristics of Improved-Durability Type Viscous Torsional Vibration Damper of Diesel Engine

1984 ◽  
Vol 19 (9) ◽  
pp. 755-763
Author(s):  
Shoichi Iwamoto ◽  
Tohru Yonezawa ◽  
Yasunori Mukawa ◽  
Masahiko Kato
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Vibration Damper

Experimental Study on Reducing Diesel Engine Noise by Using Torsional Vibration Damper

2013 ◽  
Vol 321-324 ◽  
pp. 90-93
Author(s):  
Zhi Gang Zhang
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Torsional Vibration ◽  
Power Level ◽  
Direct Injection ◽  
Sound Power ◽  
Vibration Damper ◽  
Sound Power Level ◽  
Turbo Charge ◽  
Four Cylinders

The noise of the engine and torsional vibration of the engine’s shafting is been tested. The engine is a direct injection turbo charge inter-cooling four cylinders one. In the testing, the original pulley and three different torsional vibration dampers are compared.The result shows that it can reduce the vibration of the shafting, triangular belt, the accessory, and can reduce 1 to 2 decibel of the engine’s sound power level by using the torsional vibration damper.

Transient and Unstable Torsional Vibrations on a 4-Stroke Marine Diesel Engine

2003 ◽  
Author(s):  
D. C. Lee ◽  
J. D. Yu
Keyword(s):  
Diesel Engine ◽  
Torsional Vibration ◽  
Marine Diesel Engine ◽  
Torsional Vibrations ◽  
Steady State Condition ◽  
Marine Propulsion ◽  
Friction Clutch ◽  
Marine Diesel ◽  
Noise Measurements ◽  
Unstable Vibration

Under steady state condition, unstable torsional vibration normally does not occur in shafting systems using 4stroke diesel engine due to hysteresis damping of shafting system and relative damping of standard fitted damper. However, the unstable torsional vibration occurs on marine propulsion shafting systems due to slippage of a multi-friction clutch installed between increasing gear box and shaft generator. To identify this unstable vibration and make proper counter measure, the simulation for transient torsional vibration using the Newmark method is introduced in this paper. The mechanism of this unstable vibration is verified by vibration and noise measurements of the shafting system.

scholarly journals An unconventional rubber torsional vibration damper with two degrees of freedom

2017 ◽  
Vol 13 ◽  
pp. 136-141
Author(s):  
Václav Píštěk ◽  
Pavel Kučera ◽  
Olena Nozhenko ◽  
Kostiantyn Kravchenko ◽  
David Svída
Keyword(s):  
Torsional Vibration ◽  
Degrees Of Freedom ◽  
Vibration Damper ◽  
Two Degrees Of Freedom
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