ABSTRACT
There are hundreds of automotive components that are unanimously considered as traditional tribological challenges. High temperature, high speed, and oxidative environment are the most sever operating conditions for these components. The basic principles and tribological aspects of piston skirt, piston rings and cylinder liner are extensively discussed. Valvetrain mechanism is a source of frictional losses in an engine. Recent attempts made in order to investigate the tribological challenges at the valve/seat interface are presented. Reducing friction in crankshaft bearing is highlighted. The fundamentals and outline design of frictional clutches and brakes are described. Special emphasis is given to the tribology and the failure mechanisms of clutches and brakes. Lubricants are introduced to an engine in order to protect automotive components against wear in different operating conditions. The tribological considerations of engine oils, transmission fluids and gear lubricants are addressed.
