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近年来,依照汽车发动机生态学,发动机的低排放与低燃油消耗变成了社会任务;同时,还要求输出功率高(高效率)。为满足这些要求,和常规发动机相比,近年来,为高性能发动机设定稀薄空气与燃油比的装置正在普遍推广。在这些发动机中使用的排气气门座圈(烧结材料)存在一个耐磨性问题。因为和常规发动机相比,其暴露在清洁与高温环境之中。因此,分析了发动机的磨损机理和稀薄空气与燃油比。开发了耐磨性优异的排气气门座圈(烧结材料)。
In recent years, according to automobile engine ecology, low emissions and low fuel consumption of engines have become social tasks; at the same time, high output power (high efficiency) is also demanded. In order to meet these requirements, devices for setting a lean air-to-fuel ratio for high-performance engines have been widely adopted in recent years in comparison with conventional engines. Exhaust valve races (sintered materials) used in these engines have a wear resistance issue. Because compared with conventional engines, it is exposed to clean and high temperature environment. Therefore, the wear mechanism of the engine and the lean air to fuel ratio were analyzed. Developed a wear-resistant exhaust valve seat (sintered material).