To increase comfort, performance and fuel economy, a more careful optimization of automatic transmissions is needed. Of special interest is how the temperature influences the engagement characteristics. In order to increase the level of knowledge in this area, a wet clutch test rig including a drive torque and inertia was used. The temperature and the developed energy were varied in order to investigate their influence on the characteristics of an engagement. As a consequence the influence of instant temperature, maximum temperature and instant normal force was also studied. Some of the most important conclusions of the investigation are that both the dynamic and static friction coefficients slightly decrease and the engagement time increases with increasing temperature. It was also found that the static and dynamic friction coefficients are not influenced by energy if the instant temperature is the same. An important parameter that describes the risk of stick-slip is the quotient between the static and dynamic friction. It was found that this quotient decreases with increasing temperature, and thus the risk of stick-slip is also supposed to decrease.


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    Title :

    Engagement behaviour of a paper-based wet clutch Part 2: Influence of temperature


    Contributors:
    Holgerson, M (author) / Lundberg, J (author)


    Publication date :

    1999-05-01


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English







    Engagement behavior of a paper-based wet clutch part 2: influence of temperature

    Holgerson,M. / Lundberg,J. / Lulea Univ.of Technol.,SE | Automotive engineering | 1999


    Engagement behavior of a paper-based wet clutch part 1: influence of drive torque

    Holgerson,M. / Lundberg,J. / Lulea Univ.of Technol.,SE | Automotive engineering | 1999