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Research on The Drive System of Piezoelectric Injector

机译：压电喷射器驱动系统的研究

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The paper analyzes two kinds of driving mode of piezoelectric injectors ccording to the characteristics of the piezoelectric actuator, then compares the advantages and disadvantages of the fixed duty cycle PWM switching type, variable duty cycle PWM switching and driver-based adaptive current PWM switching type, chooses voltage and current double closed-loop control strategy. The hardware and software design of high pressure common rail piezo injector driving control system were completed, as well as the experiments of different driving implementation were finished based on the designed driving control system. The results show that driver-based adaptive current PWM switching type is able to control the piezoelectric actuator deformation and the strain rate flexibly, ensure the energy distribution in the charge-discharge process of piezoelectric actuator gets more balanced.
机译：本文分析了压电喷射器的两种驱动模式，该驱动模式包括压电致动器的特性，然后比较固定职能周期PWM开关类型，可变占空比PWM开关和基于驾驶员的自适应电流PWM开关类型的优缺点， 选择电压和电流双闭环控制策略。 完成高压共轨压电喷射器驱动控制系统的硬件和软件设计，以及基于设计的驱动控制系统完成了不同驾驶实现的实验。 结果表明，基于驾驶员的自适应电流PWM开关类型能够灵活地控制压电致动器变形和应变速率，确保压电致动器的电荷 - 放电过程中的能量分布变得更加平衡。

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