摘要
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 late years,from a trend for ecology of auto motive engine,low emission and low fuel consumption of engine become a social assignment.At the same time,the high output（high efficiency） is required,too.In order to meet those requirements,in comparison with conventional engies,lean A/F（Air fuel ratio） setting is becoming popular for the high performance engines of late years.Exhaust valve seat（sintered material） used in these engines has a problem in wear resistance,because it is exposed to the surroundings that is clean and a high temperature in comparison with the conventional engines.Therefore,wear mechanism with lean A/F of engine was analyzed.The exhaust valve seat（sintered material）,that was superior in wear resistance,was developed.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2011年第1期62-63,共2页
Powder Metallurgy Technology
