Results 221 to 230 of about 365 (256)
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Contact properties of a wet clutch friction material
Tribology International, 2010Abstract Wet clutches are required to transmit torque and also prevent motion in automatic transmissions. Their performance is critically dependent on a friction material which comprises one of the contacting surfaces. Friction materials are usually a composite of fibres, naturally occurring minerals and particles of silicon and graphite, which are ...
M. Ingram, H. Spikes, J. Noles, R. Watts
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A simplified wet friction clutch test apparatus
Tribotest, 1995AbstractA small, economic, test rig to evaluate friction materials and fluids for wet clutch applications has been designed, built and commissioned. In this paper, the construction, operation and performance of the machine are described, and results are presented, for two sets of typical tests.
W. Scott, P. Suntiwattana
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Estimation of the Clutch Characteristic Map for an Automated Wet Friction Clutch Transmission
SAE Technical Paper Series, 2016<div class="section abstract"><div class="htmlview paragraph">Higher demands on comfort and efficiency require a continuous improvement of the shift process. During the launch and shift process the clutch control is used to get a smooth and efficient behavior. In this short time of acting the shifting behavior can be rated.
Thorsten Arndt +4 more
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Investigation of friction characteristic of wet clutch transmission oil
2020 3rd International Conference on Electron Device and Mechanical Engineering (ICEDME), 2020A test method for evaluating the friction characteristic of wet clutch transmission oil is presented. This method combines the actual combination characteristic of the wet clutch to design the energy density increasing experiment, and the experiment parameters fit the actual working conditions of the clutch. The real clutch is adopted, and the friction
Penghou Zhen +3 more
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Lubricant ageing effects on the friction characteristics of wet clutches
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2010The friction characteristics and performance of wet clutches have been investigated by several authors. Studies have also been made to understand the frictional performance during the service life of the clutch system. However, most lifetime studies have been conducted for systems with paper-based friction material so that systems using sintered ...
K Berglund, P Marklund, R Larsson
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Estimation of Wet Clutch Friction Parameters in Automotive Transmissions
SAE Technical Paper Series, 2015<div class="section abstract"><div class="htmlview paragraph">In this paper, a new algorithm for the off-line estimation of wet clutch friction parameters is proposed for automotive transmissions, motivated by the usefulness of such an algorithm for diagnosing the condition of the clutch and transmission fluid in service.
Matthew Barr, Krishnaswamy Srinivasan
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The mechanisms of wet clutch friction behaviour
2010Wet clutches are used in automatic transmissions to bring about gear changes and also to reduce energy loss in the torque converter. These friction devices are susceptible to stick-slip effects, which result in the vehicle giving an unsteady ride. Stick-slip effects can be avoided by ensuring the wet clutch and lubricant combination produces a friction
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Frictional Torque Transfer Behaviors of Friction Pads in Wet Clutch Engagement
Volume 15: Advances in Multidisciplinary Engineering, 2015For stable frictional torque transfer, wet clutch pads have the functional requirements of a high traction and a low wear rate with positive μ-V frictional characteristics. However, because of the intrinsic negative μ-V frictional characteristics of a friction material that has a static friction coefficient greater than its kinetic friction coefficient,
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Analysis and Control of Wet Friction Clutches for Automotive Applications
2021 American Control Conference (ACC), 2021Michael A. Laukenmann, Oliver Sawodny
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Analysis of Temperature Field on Combining Friction Discs of Wet Clutch
Applied Mechanics and Materials, 2014Because of overheat and over wear, the distortion and invalidation will be produced easily in combining friction discs of wet clutch of heavy vehicle transmission system. So the paper studies the sliding friction force of a pair of steel and friction disc, calculates the heat flow density, obtains the heat exchange function with axial symmetry, and ...
Jie Li +4 more
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