中文摘要：

针对柴油/天然气掺烧电控系统设计了一种新型的喷嘴驱动电路,该驱动电路采用高低端双电源的电路结构,实现电流峰值恒流驱动方式;通过建模仿真验证喷嘴在开启阶段采用高电压驱动可以加快响应速度;为满足喷油过程中对电流下降速率的要求,优化电路结构,实现了不同阶段续流电路的自动转换;最后通过PSPICE软件和台架实验对驱动电路的正确性进行验证,结果表明该电路可以有效缩短喷嘴的开启和关断时间,实现了喷油量和喷油定时的精确控制.

英文摘要：

A new nozzle drive circuit was designed for electronic control unit of diesel/natural gas mixed burning.The circuit structure of high and low side double power was adopted in this drive circuit to realize the peak-hold model.In the opening phase,nozzle driven by high voltage can accelerate the speed of response,which was verified by simulation.In order to meet the changes of current decline rate in the injection process,the structure of the circuit was optimized,which realized the automatic conversion of the freewheeling circuit in different stages.Finally,the PSPICE software and engine experiment were used to verify the correctness of the drive circuit.The results showed this circuit can effectively shorten the opening and closing time of nozzle,which realized the purpose of precise control of the injection quantity and injection timing.