摘要
为了改善发动机冷起动性能和排放,提出了一种用正温度系数(PTC)材料加热柴油喷油器内燃油的方法,并设计了相应的喷油器。为研究喷油器内PTC材料加热柴油的过程,试验选择了居里温度为75℃的陶瓷基PTC材料为加热元件,测量了不同电压下用PTC陶瓷加热柴油的温度变化规律。试验表明,用PTC材料对柴油进行预热,可以将柴油加热到居里点附近,实现自限温加热;同时,将PTC材料成功应用于喷油器内还需要进行相关的基础研究和解决工艺问题。
In order to improve the cold start and emissions of engine, a way which utilized the positive temperature coefficient （PTC） materials to preheat diesel fuel in the injector was presented, and this new injector was designed. In order to understand the preheating process in this new injector, the temperature of diesel fuel preheating by PTC ceramics was recorded under different voltages, of which Curie point is 75℃. The experimental results show that, diesel fuel can be heated around Curie temperature by PTC ceramics and self-defined heating is realized. However, there are a lot of fundamental studies and technology to be resolved in order to apply PTC materials in the injector successfully.
出处
《机电工程》
CAS
2009年第1期95-98,共4页
Journal of Mechanical & Electrical Engineering
关键词
冷起动
排放
正温度系数
喷油器
cold start
emissions
positive temperature coefficient（PTC）
injector
