压电堆执行器温度特性研究

摘要

Based on the heat generation and heat release principle of piezoelectric actuator, the model of piezoelectric actuator temperature characteristic for the high pressure common rail fuel injector was built. The simulation model was verified by the experiment. With the model, the influences of different factors on actuator heat generation were researched under the severe working conditions of increasing driving strength, driving frequency and driving pulse width, Moreover, the influences of actuator structure and injector cooling structure on heat release were also researched.%在压电堆执行器生热和散热机理分析基础上,建立高压共轨喷油器压电堆执行器温度特性的计算模型,经与试验结果对比,验证了模型的准确性.研究了驱动场强、驱动频率和驱动脉宽增加的苛刻工作条件下不同影响因素对压电堆执行器的生热特性的影响,并研究了压电堆执行器结构和喷油器冷却结构对散热特性的影响.