等离子体转移弧法制备的气缸内壁涂层和新型活塞环对新一代发动机的摩擦性能改进

摘要

In an effort to inhibit a climate change, the European Union has decided to reduce the CO2 emissions by approx. 30% by year 2020, as compared to the level of emissions in year 1990's In general, traffic is responsible for 20% of all CO2 emissions and 84% of those emissions result specifically from road traffic . In accordance with the present targets of the CO2 emission reduction the automotive industry has to meet strict regulations. The strict emission goals can only be reached by weight reduction of the vehicle and by an improved efficiency of engine and drive train. Close to 50% of the friction losses in a combustion engine result from the interaction between the piston ring and the cylinder bore surface t31. Therefore the cylinder bores as well as the piston rings were coated with new, low-friction materials. The friction behaviour was characterized in linear reciprocating tribometer-Test in order to identify the best combination of bore and ring coatings.%为了控制气候变化，欧盟已经承诺，到2020年，CO2气体的排放量将比1990年减少30％。二氧化碳总排放量的20％来源于交通，其中道路交通占据了交通气体排放的84％以上。为了实现二氧化碳减排的目标，汽车行业不得不执行更严格的排放标准。汽车行业减排只有通过减轻车身重量和提高发动机和传动系统的效率方可实现。内燃机中接近50％的能量用来克服活塞环与气缸内壁之间的摩擦阻力，因此气缸内壁以及活塞环上均被涂上新型的低摩擦材料，以减少该部位带来的能量损失。论文中采用线性往复摩擦试验机表征气缸壁和活塞环间的摩擦行为，以便找出最佳的涂层组合。