What is it about?
Modern diesel engines have high power and sometimes their pistons become damaged in operation. It is thought to be caused by high temperature and resulting material expansion. We have examined how temperature affects internal stress and expansion on the piston skirt locally and shown that material creep occurs in places on the surface known to usually become damaged. At the same time thermal expansion is uniform along the skirt and cannot be the cause of damage by itself.
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Why is it important?
The development trends of transport and stationary energy installations attest that the use of internal combustion engines are going to maintain a significant consumer market share in the foreseeable future. Enhancing their performance is crucial for easier introduction of them into the carbon-neutral circular economy. The piston is one of the critically important components of engine design. Our findings lay the foundation for further research aimed at increasing piston reliability and possible further boosting of engines.
Perspectives
The article is written with a reliance on the previous works of the scientific school of Internal Combustion Engines department in National Technical University “Kharkiv Polytechnic Institute” and is a part of continuous work aimed at eventually overcoming the known problem of unpredictable scuffing and seizures on the skirts of diesel engine pistons emerging in operation.
Vyacheslav Pylyov
National Technical University "Kharkiv Polytechnic Institute"
Read the Original
This page is a summary of: Analysis of the thermal stress state of the ICE piston skirt in critical cases, January 2025, American Institute of Physics,
DOI: 10.1063/12.0038607.
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