Abstract

Publisher Summary This chapter highlights the significance of a lubricant as an engineering design material. If the lubricant film is sufficiently thick to prevent the opposing solids from coming into contact, the condition is referred to as “fluid film lubrication.” This condition is often considered as the ideal form of lubrication since it provides low friction and a high resistance to wear. The behavior of the contact is governed by the bulk physical properties of the lubricant, and the frictional characteristics arise purely from the shearing of the viscous lubricant. Different modes of lubrication are significant in the alternative tribological components of the engine and a component may undergo a wide range of lubrication regimes during a cycle. The physical and chemical actions associated with the modes of lubrication known as hydrodynamic, elastohydrodynamic, mixed, and boundary are discussed in the chapter.

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