Experimental Study on Dynamic Response Characteristics of Piezoelectric Injector

LIU Chen; LIU Zhenming; CHEN Ping; LIU Jingbin

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (5) : 28-33.

LIU Chen,LIU Zhenming,CHEN Ping,LIU Jingbin

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Abstract

For the selfdesigned piezoelectric injector, the injection law of the piezoelectric injector was studied by using the injection law tester, and the dynamic response characteristics and injection capability of the injector were analyzed under different rail pressures and control pulse widths. The results show that the injection duration is relatively stable under different rail pressures and control pulse widths. The injection opening response delay only increases by about 14.5% when the rail pressure increases from 120 MPa to 160 MPa. And the injection closing response delay decreases by about 14.9% when the control pulse width increases from 1.0 ms to 2.5 ms. The standard deviation between the main and pilot injection is only about 0.4 and 0.3 respectively for multiple injections.

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/ mso-hansi-font-family: 宋体">piezoelectric injector;response characteristic;injection characteristic

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LIU Chen,LIU Zhenming,CHEN Ping,LIU Jingbin. Experimental Study on Dynamic Response Characteristics of Piezoelectric Injector[J]. Vehicle Engine. 2021, 0(5): 28-33