The Effects of Cylinder Head Deformation and Asymmetry on Exhaust Valve Thermo-Mechanical Stresses
981034
02/23/1998
- Event
- Content
- A geometrically accurate, three-dimensional finite element model of a Diesel engine exhaust valve and cylinder head assembly has been developed to analyze the effect of cylinder head interactions on exhaust valve stresses. Results indicate that a multi-lobed stress pattern occurs around the exhaust valve head due to cylinder head deformation, stiffness variations, and thermal asymmetry. Consequently, peak valve bending and hoop stresses from the three-dimensional model are 48% and 40% higher, respectively, than for the two-dimensional, axisymmetric model. These results indicate the degree of model complexity required for more accurate analyses of exhaust valve operating stresses.
- Pages
- 11
- Citation
- Meyer, T., and White, R., "The Effects of Cylinder Head Deformation and Asymmetry on Exhaust Valve Thermo-Mechanical Stresses," SAE Technical Paper 981034, 1998, https://doi.org/10.4271/981034.