一种带正温度系数材料加热的柴油喷油器

作者：方晓敏1，李孝禄1，特木乐2，赵雪菲1 日期：2009-02-23/span> 浏览：3035 查看PDF文档

一种带正温度系数材料加热的柴油喷油器

方晓敏1，李孝禄1，特木乐2，赵雪菲1
(1.中国计量学院 机电工程学院,浙江 杭州 310018;2.山东康达喷油泵有限公司，山东 龙口 265701)

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。
关键词：冷起动；排放；正温度系数；喷油器
中图分类号：TK411文献标识码：A文章编号：1001-4551(2009)01-0095-04

A new diesel injector with PTC materials
FANG Xiao-min1, LI Xiao-lu1, TE Mu-le2, ZHAO Xue-fei1
(1.College of Mechanical & Electrical Enginering, China Jiliang University, Hangzhou 310018, China;
2.Shandong Kangda Fuel Injection Equipment Co.Ltd., Longkou 265701, China)
Abstract: 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.
Key words: cold start; emissions; positive temperature coefficient(PTC); injector
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