Technical Paper
Tribological interferences on the cylinder head union associated with the seal and its effects on the bolted joint tightening process
2021-03-26
2020-36-0236
The automotive industry has a lack of knowledge when the subject comes to screw joint technique, especially regarding tribological interferences. These themes are not commonly explored together on studies to comprehend the behavior between contacting surfaces. When there is a specific goal, as the one proposed in this paper: to ensure all control levels to eliminate sealing deficiency risks inside combustion chamber in a low investment cost, these needs are even higher. The tribological analysis between diesel engine block and its cylinder head is essential to understand the minimum requirements to achieve the best possible sealing, mostly when it comes to assembly tightening process routines. In this sense, this work puts forward a methodology to set best tightening conditions in order to guarantee the sealing to whatever surface topography. Additionally, the acquired knowledge can be used to other similar applications associated to bolted joints, such as in other vehicle parts.
