Analysis of the tribological behaviour of an automotive engine exhaust valve and a valve seat using a newly developed high temperature workbench

Abstract

parameter values. Using this workbench, some materials were tested to determine whether they can be used at high temperatures, as will be necessary in the next generation of engines. Detachments from the seat material (SAE 4340) were observed in the tests, and the detached material adhered to the valve. This phenomenon significantly increases the surface roughness of the components, and it may lead to loss of function. Thus, the tested valve material (SAE EV12 21-2 N) was more resistant to wear than the seat material.

Study of the periodic thermal contact between exhaust valve and its seat in an internal combustion engine

“…The need for a better understanding of the effect of surface topography on heat transfer during periodic contact is further highlighted by the widespread use of various materials in industrial and technological applications [24,25,48] . The surface topography and roughness of materials can significantly impact the heat transfer characteristics and it is crucial to be able to predict and quantify these effects in order to optimize the design of heat transfer systems.…”

“…Numerous studies have focused on developing models to regulate thermal behavior, both theoretically and experimentally. Some of the main areas of focus include the use of new materials and lightweight design solutions [24,25,48] optimization of valveseat components, and modeling of heat transfer and combustion processes. Many researchers have used advanced numerical simulations [13], such as finite element analysis and computational fluid dynamics [4], to gain a deeper understanding of the complex phenomena involved in internal combustion engines.…”