Multi-Parameter Optimization and Matching of Piezoelectric Injector

LIU Nan; LIU Zhenming; GONG Xinrui; HUANG Xinyuan; ZHOU Lei

doi:10.3969/j.issn.1001-2222.2019.02.005

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (2) : 28-33. DOI: 10.3969/j.issn.1001-2222.2019.02.005

Multi-Parameter Optimization and Matching of Piezoelectric Injector

LIU Nan，LIU Zhenming，GONG Xinrui，HUANG Xinyuan，ZHOU Lei

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Abstract

Taking as a newly-proposed drive control technology, the piezoelectric injection technology provides a reliable approach for the precise injection of tiny fuel and multi-injection due to its rapid and dynamic response. A onedimensional electricalmechanicalhydraulic coupling mathematical model of selfdeveloped piezoelectric injector was established based on AMESim software. Taking the response characteristic index of injector needle valve as the optimized object, the structural parameters that had a great influence on the response characteristic of injector were determined. The orthogonal experimental optimization (DOE) and genetic algorithm were used respectively so that multiobjective optimization of key structural parameters was carried out. The results show that the opening delay and duration of needle valve shorten by 16% and 23.6% respectively and the closing delay and duration shorten by 13.6% and 13.3% respectively after optimization. The response characteristics of needle valve greatly improve, which is conducive to realize tiny fuel injection and multi-injection.

Key words

diesel engine / piezoelectric injector / needle valve response / structure parameter

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LIU Nan，LIU Zhenming，GONG Xinrui，HUANG Xinyuan，ZHOU Lei. Multi-Parameter Optimization and Matching of Piezoelectric Injector[J]. Vehicle Engine. 2019, 0(2): 28-33 https://doi.org/10.3969/j.issn.1001-2222.2019.02.005