Sökning: "Daniel Gebretsadik"

Hittade 2 avhandlingar innehållade orden Daniel Gebretsadik.

  1. 1. Tribological Behaviour of Pb-free Engine Bearing Materials

    Författare :Daniel Gebretsadik; Donald McCarthy; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : Engine bearings are amongst the most critical components of an internal combustion engine that support and allow smooth rotation of the crankshaft. They are designed to operate under hydrodynamic lubrication condition where the bearing and shaft surface are separated by a thick lubricant film. LÄS MER

  3. 2. Tribological characteristics of some multi-layered Pb-free engine bearing materials

    Författare :Daniel Woldegebriel Gebretsadik; Arto Lehtovaara; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Sammanfattning : Lead (Pb) containing alloys such as white metals and Cu-Pb-Sn (lining) with Pb-based overlay plating have been extensively used as materials for internal combustion engine bearings during the last several decades. However, owing to environmental and health concerns, the use of Pb containing materials in automotive engine components is being restricted. LÄS MER