摘要
压电式喷射器中压电阀的响应速度决定了内燃机燃料喷射控制的性能和精度。为提高压电阀响应速度,针对自主研制的压电阀及其基于脉宽调制(PWM)控制方式的驱动电路,利用MATLAB/Simulink建立两者的联合仿真模型,并搭建压电阀性能测试试验台,通过仿真与试验结合的方式探究喷射控制信号PWM脉宽、脉冲数对压电阀响应时间的影响。结果表明:对自研驱动电路,喷射控制信号PWM脉宽存在最优值,且最优脉宽在03~042 ms内;多脉冲控制策略下,压电阀开启和关闭响应时间分别为0525、0725 ms;单脉冲控制策略下,压电阀开启和关闭响应时间分别为05、06 ms,均满足内燃机一个循环内实现多次喷射的控制要求;相较于多脉冲控制策略,单脉冲控制策略开启响应时间缩短4762%,关闭响应时间缩短172%。
The response speed of piezoelectric valve in piezoelectric injector determines the performance and accuracy of fuel injec-tion control in internal combustion engines.In order to improve the response speed of piezoelectric valve,a joint simulation model of pie-zoelectric valve and its drive circuit based on pulse width modulation(PWM)control method was established by MATLAB/Simulink,and a test bench was built to test the performance of piezoelectric valve,and the effect of PWM pulse width and pulse number of injec-tion control signal on the response time of piezoelectric valve was investigated by combining simulation and test.The results show that for the self-researched drive circuit,the PWM pulse width of the injection control signal has an optimal value,and the optimal pulse width is from 0.3 ms to 0.42 ms.Under the multi-pulse control strategy,the response times of piezoelectric valve opening and closing are 0525 ms and 0.725 ms respectively;under the single-pulse control strategy,the response times of piezoelectric valve opening and closing are 0.5 ms and 0.6 ms respectively,which meet the control requirements for achieving multiple injections in one cycle of an in-ternal combustion engine.Compared with the multi-pulse control strategy,the opening response time of the single-pulse control strategy is shortened by 4.762%,and the closing response time is shortened by 17.2%.
作者
李帆
高翔
王勤鹏
贺玉海
LI Fan;GAO Xiang;WANG Qinpeng;HE Yuhai(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan Hubei 430063,China;China State Shipbuilding Corporation Power(Group)Co.,Ltd.,Shanghai 201208,China;Key Laboratory of Ship Power Engineering Technology Transportation Industry,Wuhan University of Technology,Wuhan Hubei 430063,China;Electronic Control Sub Laboratory of National Engineering Laboratory of Naval Architecture and Ocean Engineering Power Systems,Wuhan University of Technology,Wuhan Hubei 430063,China)
出处
《机床与液压》
北大核心
2024年第13期1-6,共6页
Machine Tool & Hydraulics
基金
国家高技术船舶科研项目(2022-173)。
关键词
压电阀
响应时间
控制策略
piezoelectric valve
response time
control strategy
