Generally, automobiles have many performance requirements for comfort, of which noise, vibration and harshness are very important. Toyota Motor Corporation equipped several 2003 models with the second-generation Electronically Controlled Brake system (ECB2). These ECB2 actuator units adopted a new structure that reduced pumping noise by controlling the skew phenomena of needle roller bearings. Normally, needle roller bearings are advantageous over other bearings in cases where a large force is loaded on bearings, because the contact areas can be made larger. However, a thrust force arises from skew phenomena because of minute clearances among the component parts of needle roller bearings. As a result, axial vibration of the bearing shaft sometimes occurs due to the thrust force. This paper explains how the thrust force generated from the skew phenomena of needle roller bearings occasionally affects the pumping vibration level of equipped machinery such as the brake actuator unit. Based on this study result, we developed a needle roller bearing that suppresses skew phenomena (i.e., a low-vibration needle roller bearing). Analysis and measurements have revealed that by using the developed bearings and controlling the magnitude and direction of generated thrust force, it is possible to suppress the influence of thrust force on equipment (brake actuator) vibration thereby reducing noise in a vehicle. This paper reports on these studies and findings.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Vibration Reduction Applying Skew Phenomena of Needle Roller Bearings in Brake Actuators


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Suzuki, Masakuni (Autor:in) / Kono, Shingo (Autor:in) / Ishida, Takeshi (Autor:in)

    Kongress:

    SAE 2006 World Congress & Exhibition ; 2006



    Erscheinungsdatum :

    2006-04-03




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Vibration reduction applying skew phenomena of needle roller bearings in brake acutators

    Suzuki,M. / Ishida,T. / Kono,S. et al. | Kraftfahrwesen | 2006


    Needle roller bearings

    Paterson, E.V. | Engineering Index Backfile | 1944


    Needle roller bearings

    Hutchinson, A.E. | Engineering Index Backfile | 1968


    Chamshaft Vibration Characteristic Assessment when Applying Needle Roller Bearings as Solution for Efficiency Increase

    Nonato, Fabio / Tuckmantel, Felipe Wenzel da Silva / Freitas, Thiago Caetano de | SAE Technical Papers | 2012