GDN-12 ESTIMATED METHOD OF THE PLANETARY-GEAR-NOISE FOR AUTOMATIC TRANSMISSION(DYNAMICS AND NOISE PROBLEMS OF GEARS AND GEAR BOXES)

2009 ◽  
Vol 2009 (0) ◽  
pp. 288-293
Author(s):  
Yusuke NAKURA ◽  
Kunihiko MORIKAWA ◽  
Kouji KUMAGAI ◽  
Masaharu KOMORI ◽  
Akira MUROI ◽  
...  
Keyword(s):  
Automatic Transmission ◽  
Planetary Gear ◽  
Transmission Dynamics ◽  
Gear Noise

A Research for the Planetary Gear Noise Development in FF 6th Speed Automatic Transmission

2011 ◽  
Author(s):  
Hyun-Ku Lee ◽  
Koo-Tae Kang ◽  
Moo-Suk Kim ◽  
Jin-Wook Hur
Keyword(s):  
Gear Tooth ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
The Sun ◽  
Noise Levels ◽  
Noise Sources ◽  
Valve Body ◽  
Gear Noise ◽  
Radiated Noise ◽  
Transfer Path

In order to improve the planetary gear noise of the new developed 6th speed automatic transmission, it needs to understand noise mechanism. Basically, many transmission’s components have an effect on the gear noise. In this paper, planetary gear noise sources which are influenced by gear tooth shapes and backlash among the gears, position of pinion gears, and misalignment of the sun gear are studied and experimented. Also, transfer-path likewise one-way clutch contacted between the carrier and case, and valve-body covers are also researched to reduce the transferred vibration and radiated noise levels. After developing the planetary gear noise, its evaluation specification is adapted to EOL (end of line) equipment to check the transmission’s noise quality in the factory.

A study on the development and application of program for planetary gear design considering planetary gear noise and efficiency

2021 ◽  
Vol 263 (5) ◽  
pp. 1516-1526
Author(s):  
Hyun Ku Lee ◽  
Moo Suk Kim ◽  
Sa Man Hong ◽  
Dong Kyu Yoo ◽  
Ahmet Kahraman ◽  
...  
Keyword(s):  
Input Parameter ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
Transmission Efficiency ◽  
Design Stage ◽  
Concept Design ◽  
Mechanical Loss ◽  
Gear Noise ◽  
Gear Design ◽  
Planetary Gear Sets

In general, gear mechanical loss is associated with the friction of the lubricating contact surface of the gear and bearing that transmit the power, and a no-load spin loss which is load independent occurs due to gear rotation and the interaction of the bearing component with the lubricating element. In order to minimize planetary gear loss, it is desirable to design by checking the efficiency at the concept design stage. However, a design technique that considers the noise and efficiency of a planetary gear set simultaneously has not been achieved so far. In this paper, a program called 'pRMC with EHL' to check together the efficiency and noise that affected by gear specifications has been developed. By using developed program, planetary gear sets specifications have been designed. And through the experimental evaluation, automatic transmission efficiency could be reduced by 0.3% in combination fuel consumption mode and the planetary gear vibration could be also reduced by 10 dB than former design. Through this designing verification and input parameter correlation, a new planetary gear set designing process has been come up with successfully at the concept design stage.

Precise and High Response Measuring Method of Meshing Force of Planetary Gear Mechanism

2012 ◽  
Vol 516 ◽  
pp. 469-474
Author(s):  
Yuta Morimoto ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama ◽  
Yasuhiro Uenishi
Keyword(s):  
Electric Vehicles ◽  
Automotive Industry ◽  
Differential Rotation ◽  
Planetary Gear ◽  
Measuring Method ◽  
Power Source ◽  
Hybrid Vehicles ◽  
Gear Noise ◽  
Gear Mechanism ◽  
Planetary Gear Mechanism

Recently, technology for electric vehicles (EV) and hybrid vehicles (HEV) has been focused on by the automotive industry to address environmental problems including CO2 reduction [. In particular, in HEV, planetary gears are used to control differential rotation of the motor, engine and generator. For these vehicles, the noise level inside the vehicle is low because the motor is used as the main power source. As a result, further decrease of gear noise is desired compared with the conventional planetary gear mechanism. However, research into the gear noise of the planetary gear mechanism is extremely scarce. Therefore, in this study, we focus on the three axes of I/O rotation, and a new method of measuring the meshing force of the planetary gear mechanism. In this report, a gear-driving device, which is able to make 3-axis differential rotation, was designed for experimentation.

scholarly journals Experimental Investigations of Noise Control in Planetary Gear Set by Phasing

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
S. H. Gawande ◽  
S. N. Shaikh
Keyword(s):  
Experimental Work ◽  
Noise Level ◽  
Planetary Gear ◽  
Experimental Investigations ◽  
Mesh Stiffness ◽  
Gear Noise ◽  
Gear Drive ◽  
Internal Excitation ◽  
Key Factor ◽  
Set Up

Now a days reduction of gear noise and resulting vibrations has received much attention of the researchers. The internal excitation caused by the variation in tooth mesh stiffness is a key factor in causing vibration. Therefore to reduce gear noise and vibrations several techniques have been proposed in recent years. In this research the experimental work is carried out to study the effect of planet phasing on noise and subsequent resulting vibrations of Nylon-6 planetary gear drive. For this purpose experimental set-up was built and trials were conducted for two different arrangements (i.e., with phasing and without phasing) and it is observed that the noise level and resulting vibrations were reduced by planet phasing arrangement. So from the experimental results it is observed that by applying the meshing phase difference one can reduce planetary gear set noise and vibrations.

ALLOWANCE VALUES FOR CONTINUOUS ROLLING GEAR GRINDING OF CYLINDRICAL WHEELS

2020 ◽  
pp. 12-17
Author(s):  
A. S. Kalashnikov ◽  
Yu. A. Morgunov ◽  
P. A. Kalashnikov ◽  
A. G. Karavanova
Keyword(s):  
Analytical Method ◽  
Error Compensation ◽  
Automatic Transmission ◽  
Experimental Studies ◽  
Planetary Gear ◽  
Continuous Rolling ◽  
Cylindrical Gears ◽  
Minimum Value ◽  
Gear Grinding ◽  
Optimal Values

Designed and experimentally investigated the analytical method of determining the minimum value of the allowances at the side surfaces of the teeth of cylindrical gears taking into account the errors in the gear obtained in the preceding operation, and error compensation from the operation performed. For practical confirmation of the accuracy of the method of determining the allowance, an experimental gear grinding of a batch of satellites of the planetary gear of the cars automatic transmission was carried out. Based on the results of theoretical and experimental studies, recommendations were developed to determine the optimal values of allowances for the operation of grinding teeth.

A Finite Element Method for the Dynamic Analysis of Automatic Transmission Gear Shifting with a Four-Degree-of-Freedom Planetary Gearset Element

2003 ◽  
Vol 217 (6) ◽  
pp. 461-473 ◽  
Author(s):  
N Zhang ◽  
A Crowther ◽  
D K Liu ◽  
J Jeyakumaran
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Automatic Transmission ◽  
Free Vibration Analysis ◽  
Planetary Gear ◽  
Rigid Body Dynamics ◽  
Degree Of Freedom ◽  
Parametric Change ◽  
Stiffness And Damping ◽  
Element Method

A dynamic model of a passenger car automatic transmission and driveline is developed for simulating transient torsional vibration in gearshifts. A finite element method is proposed for presenting the transient dynamics of the parametric system, element matrices are defined and then global inertial, stiffness and damping matrices are formulated corresponding to the defined global coordinate vectors. A four-degree-of-freedom matrix element is developed that describes the rigid body dynamics of the planetary gear set and is then integrated with the driveline system; this element captures the parametric change while the transmission speed ratios vary over gearshifts. Free vibration analysis and a transient 2-3 upshift simulation are discussed and results presented.

Planetary Gear Fatigue Behavior in Automatic Transmission

2006 ◽  
Author(s):  
Tze-Chi Jao ◽  
Timothy Henly ◽  
Gerald W. Carlson ◽  
Chintan Ved ◽  
Roscoe O. Carter ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Automatic Transmission ◽  
Planetary Gear
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