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Functional Properties of Microstructured Cylinder Liner Surfaces for Internal Combustion Engines

机译：内燃机微结构气缸套表面的功能特性

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摘要

Internal combustion engines are still of major importance as propulsion systems. To fulfil future market and legislative demands it is necessary to improve engine performance, reduce fuel consumption, and limit exhaust emissions. Mechanical and thermodynamic losses, wear, and the emissions caused by lubricating oil combustion are principally influenced by the tribological behaviour of the piston assembly. The trend towards compact engines with high power densities and increased thermomechanical loads increases the importance of this tribological system and requires new approaches. One promising possibility is the utilisation of liner surfaces with specially machined microstructures. This paper describes a comparison between a conventional liner surface and a laser-structured liner as regards their tribological behaviour. Measurements of wear as well as of oil film thickness and friction force in operation have been carried out. The results show better tribological behaviour for the laser-structured liner surface than for the conventional plateau-honed surface. This leads to lower fuel consumption and less wear.
机译：内燃机作为推进系统仍然非常重要。为了满足未来的市场和立法要求，必须提高发动机性能，减少燃油消耗并限制废气排放。机械和热力学损失，磨损以及润滑油燃烧引起的排放物主要受活塞组件的摩擦性能影响。具有高功率密度和增加的热机械负荷的紧凑型发动机的趋势增加了该摩​​擦系统的重要性，并需要新的方法。一种有前途的可能性是利用具有特殊加工的微结构的衬里表面。本文介绍了常规衬里表面和激光结构衬里在摩擦学性能方面的比较。在运行中已经进行了磨损以及油膜厚度和摩擦力的测量。结果表明，与传统的高原珩磨表面相比，激光结构衬套表面的摩擦学性能更好。这导致更低的燃料消耗和更少的磨损。

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