Fundamental study of suppressive effect against subharmonic vibration of order 1/2 in automatic transmission for car by using dynamic absorber

2020 ◽  
Vol 2020.29 (0) ◽  
pp. 1017
Author(s):  
Shuya FUJIWARA ◽  
Takahiro RYU ◽  
Takashi NAKAE ◽  
Kenichiro MATSUZAKI
Keyword(s):  
Automatic Transmission ◽  
Suppressive Effect ◽  
Fundamental Study ◽  
Dynamic Absorber ◽  
Subharmonic Vibration

scholarly journals Fundamental study on countermeasures against subharmonic vibration of order 1/2 in automatic transmissions for cars

2018 ◽  
Vol 211 ◽  
pp. 13004
Author(s):  
Fumiya Takino ◽  
Takahiro Ryu ◽  
Takashi Nakae ◽  
Kenichiro Matsuzaki ◽  
Risa Ueno
Keyword(s):  
Piecewise Linear ◽  
Vibration Reduction ◽  
System Model ◽  
Torsional Vibrations ◽  
Fundamental Study ◽  
Automatic Transmissions ◽  
Linear Spring ◽  
Low Stiffness ◽  
Subharmonic Vibration ◽  
The One

In automatic transmissions for cars, a damper is installed in the lock-up clutch to absorb torsional vibrations caused by combustion in the engine. Although a damper with low stiffness reduces the torsional vibration, low-stiffness springs are difficult to use because of space limitations. To address this problem, dampers have been designed using a piecewise-linear spring having three different stages of stiffness. However, a nonlinear subharmonic vibration of order 1/2 occurs because of the nonlinearity of the piecewise-linear spring in the damper. In this study, we experimentally and analytically examined a countermeasure against the subharmonic vibration by increasing the stages of the piecewise-linear spring using the one-degree-of-freedom system model. We found that the gap between the switching points of the piecewise-linear spring was the key to vibration reduction. The experimental results agreed with results of the numerical analyses.

Fundamental experiment and theoretical analysis for subharmonic vibration in automatic transmission

2016 ◽  
Vol 2016 (0) ◽  
pp. 125
Author(s):  
Akihiro NANBA ◽  
Takashi NAKAE ◽  
Takahiro RYU ◽  
Kenichiro MATSUZAKI ◽  
Sofian ROSBI ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Automatic Transmission ◽  
Subharmonic Vibration ◽  
Fundamental Experiment

707 Fundamental Study on Dynamic Absorber of Parametric Excitation Type

2006 ◽  
Vol 2006.43 (0) ◽  
pp. 221-222
Author(s):  
Yuji HAKODA ◽  
Yoshio IWATA ◽  
Hidenori SATO ◽  
Toshihiko KOMATSUZAKI
Keyword(s):  
Parametric Excitation ◽  
Fundamental Study ◽  
Dynamic Absorber

1E4 Effect of springs characteristics of damper to the occurrence of subharmonic vibration in automatic transmission powertrain

2014 ◽  
Vol 2014 (0) ◽  
pp. _1E4-1_-_1E4-2_
Author(s):  
Sofian Rosbi ◽  
Takahiro RYU ◽  
Takashi NAKAE ◽  
Kenichiro MATSUZAKI ◽  
Atsuo SUEOKA ◽  
...  
Keyword(s):  
Automatic Transmission ◽  
Subharmonic Vibration

Effect of Stiffness Ratio of Piecewise-Linear Spring on the Occurrence of Subharmonic Nonlinear Vibration in Automatic Transmission Powertrain

2015 ◽  
Vol 786 ◽  
pp. 156-160 ◽  
Author(s):  
Takahiro Ryu ◽  
S. Rosbi ◽  
K. Matsuzaki ◽  
T. Nakae ◽  
A. Sueoka ◽  
...  
Keyword(s):  
Nonlinear System ◽  
Nonlinear Vibration ◽  
Forced Vibration ◽  
Piecewise Linear ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Degree Of Freedom ◽  
Stiffness Ratio ◽  
Linear Spring ◽  
Subharmonic Vibration

In the torque converter, a damper with a piecewise-linear spring is used to reduce the forced vibration, and the subharmonic vibration occurs when the spring restoring torque characteristics approach the switching point. This research analyzed the effect of stiffness ratio between the neighboring piecewise-linear springs on the occurrence of the subharmonic nonlinear vibration in automatic transmission powertrain. The powertrain is modeled with multi degree-of-freedom nonlinear system as an actual vehicle. The result shows higher value of the stiffness ratio between the neighboring springs creates larger value of the subharmonic vibration.

scholarly journals Fundamental study of subharmonic vibration of order 1/2 in automatic transmissions for cars

2016 ◽  
Vol 744 ◽  
pp. 012206
Author(s):  
T Ryu ◽  
T Nakae ◽  
K Matsuzaki ◽  
A Nanba ◽  
Y Takikawa ◽  
...  
Keyword(s):  
Fundamental Study ◽  
Automatic Transmissions ◽  
Subharmonic Vibration
Sign in / Sign up

Export Citation Format

Share Document