Automatic Transmission Gear Whine Simulation and Test Correlation

2005 ◽  
Author(s):  
Yuping Cheng ◽  
Takeshi Abe ◽  
Brian K. Wilson
Keyword(s):  
Automatic Transmission ◽  
Transmission Gear ◽  
Test Correlation

Nomographs for Enumeration of Clutching Sequences Associated With Epicyclic-Type Automatic Transmission Mechanisms

2008 ◽  
Author(s):  
Essam L. Esmail
Keyword(s):  
Automatic Transmission ◽  
Root Cause ◽  
Transmission Mechanisms ◽  
Epicyclic Gear ◽  
Angular Velocities ◽  
Gear Mechanism ◽  
Gear Trains ◽  
Exact Size ◽  
Algorithmic Techniques ◽  
Transmission Gear

A new methodology for the enumeration of feasible clutching sequences for a given epicyclic gear mechanism (EGM) is presented using the kinematic nomographs of epicyclic-type transmission mechanisms. From such nomographs, the kinematic characteristics of an epicyclic gear mechanism can be expressed in terms of the gear ratios of its gear pairs. From a single nomograph, the angular velocities for all of the coaxial links can be estimated and compared directly without specifying the exact size of each gear. In addition, the angular velocities can be arranged in a descending sequence without using complicated artificial intelligence or algorithmic techniques. Then, a procedure for the enumeration of feasible clutching sequences associated with a transmission mechanism composed of two or more fundamental gear entities (FGEs) is developed. The reliability of the methodology is established by applying it to two transmission gear trains for which solutions are either fully or partially available in the literature. In the process, an incomplete in the results reported in previous literature is brought to light. And the root cause of this incompleteness is explored. The present methodology is judged to be more efficient for enumeration of all feasible clutching sequences of an EGM.

scholarly journals Multi-Objective Genetic Algorithm for an automatic transmission gear shift map

2016 ◽  
Vol 49 (3) ◽  
pp. 123-128 ◽  
Author(s):  
Adama Fofana ◽  
Olivier Haas ◽  
Vince Ersanilli ◽  
Keith Burnham ◽  
Joe Mahtani ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Automatic Transmission ◽  
Gear Shift ◽  
Multi Objective ◽  
Multi Objective Genetic Algorithm ◽  
Shift Map ◽  
Transmission Gear

scholarly journals Computer-Aided Sketching of Epicyclic-Type Automatic Transmission Gear Trains

1994 ◽  
Author(s):  
Goutam Chatterjee ◽  
Lung-Wen Tsai
Keyword(s):  
Automatic Transmission ◽  
Reverse Transformation ◽  
Epicyclic Gear ◽  
Computer Aided ◽  
Planet Gear ◽  
Gear Mechanism ◽  
Gear Trains ◽  
Transmission Gear

Abstract The enumeration of epicyclic gear mechanisms in the form of graphs gives rise to the need of a methodology for reverse transformation, that is, for constructing the mechanisms from graphs. This paper addresses the issue by discretizing an epicyclic gear mechanism into Fundamental Geared Entities. Further, these geared entities are shown to be a conglomeration of four primitives; namely, the carrier, sun, ring, and the planet gear. An algorithm is formulated to create the entities from a graph by using these primitives. The entities are then connected together to form a mechanism.

Optimizing the Smoothness and Temperatures of a Wet Clutch Engagement Through Control of the Normal Force and Drive Torque

1999 ◽  
Vol 122 (1) ◽  
pp. 119-123 ◽  
Author(s):  
Mikael Holgerson
Keyword(s):  
Temperature Rise ◽  
Normal Force ◽  
Dynamic Performance ◽  
Automatic Transmission ◽  
Test Rig ◽  
Friction Characteristics ◽  
Drive Torque ◽  
Clutch Engagement ◽  
Wet Clutch ◽  
Transmission Gear

Automatic transmission gear shifts are handled by wet clutches, which determine the smoothness. The clutch face temperatures during the engagements are often an important parameter for the total clutch life. A wet clutch test rig has been used to evaluate how a wet clutch engagement can be improved in terms of smoothness and temperature. This was performed with control based upon knowledge about friction characteristics and dynamic performance. The parameters used for control were the drive torque and the normal force on the clutch. By drive torque shut-off and reduced normal force the torque variations were greatly reduced and the temperature rise was decreased by 37%. [S0742-4787(00)01601-5]

scholarly journals IOT ENABLED PNEUMATIC GEAR SHIFTING IN TWO-WHEELER

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
S Divya ◽  
Dinesh K.K ◽  
Abishek S ◽  
Bala Ganesh M ◽  
Gokulkrishnan S
Keyword(s):  
Control Mechanism ◽  
Automatic Transmission ◽  
Gear Transmission ◽  
Transmission Mechanism ◽  
Maintenance Cost ◽  
Mechanical Device ◽  
New Device ◽  
Two Wheeler ◽  
Very High ◽  
Transmission Gear

The present automatic transmission is fully mechanically controlled and costs very high. In this study, a gear shifting mechanism was designed and applied on a featured bike to make the gear transmission process faster and less destructible for the driver using internet. But the gear transmission mechanism designed makes driving easier and to achieve efficient driving. This new device must be reliable, has small dimensions, economical and low maintenance cost. This project aims to improve the gear shifting process with a suitable control mechanism to implement in clutch featured bikes. According to the suggested gear shifting method, which selects the transmission gear as per the speed of the vehicle without direct human interference. A pneumatic shifter is a mechanical device that uses compressed air to shift a gear controls the engaging and disengaging of gears using internet of things principle to control automatically. There is no lag time in a gear shifting operation and taking hold in the rest of the vehicles.

scholarly journals Computer-Aided Sketching of Epicyclic-Type Automatic Transmission Gear Trains

1996 ◽  
Vol 118 (3) ◽  
pp. 405-411 ◽  
Author(s):  
G. Chatterjee ◽  
Lung-Wen Tsai
Keyword(s):  
Automatic Transmission ◽  
Reverse Transformation ◽  
Epicyclic Gear ◽  
Computer Aided ◽  
Planet Gear ◽  
Gear Mechanism ◽  
Gear Trains ◽  
Transmission Gear

The enumeration of epicyclic gear mechanisms in the form of graphs gives rise to the need of a methodology for reverse transformation, that is, for constructing the mechanisms from graphs. This paper addresses the issue by discretizing an epicyclic gear mechanism into Fundamental Geared Entities. Further, these geared entities are shown to be a conglomeration of four primitives; namely, the carrier, sun, ring, and the planet gear. An algorithm is formulated to create the entities from a graph by using these primitives. The entities are then connected together to form a mechanism.

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