压电式空气补气阀技术研究及应用

介绍了一种基于压电双晶片的空气补气阀(ACV)。该压电阀安装于摩托车化油器怠速补气通道,通过现场传感器信号的采集,根据控制策略,利用压电阀的流量特性,实施脉冲宽度调制(PWM)驱动控制,达到国Ⅲ排放要求。该文通过对逆向压电效应、压电方程的理论分析,依据实际的双晶片尺寸,得出空气补气阀的实际位移和力矩,并通过实际的测试,发现在100V、15Hz的PWM控制波形驱动下,该压电补气阀呈现出了良好的稳定性和一致性,满足了电控化油器中对怠速智能补气的需求。

Research and Applications of Piezoelectricity ACV and Control Technology

An air compensation valve(ACV) based on the piezoelectric bimorph has been introduced in this paper.The piezoelectric ACV is installed in the idle compensation channel of the motorcycle carburetor.Through the on-site collection of sensor signal and the control strategy,the ACV is driven by the pulse width modulation(PWM) control by making use of the flow characteristic of piezoelectric valve,thus the emission standard has been up to China stage III.By analyzing the inverse piezoelectric effect and the piezoelectric equations theoretically,the actual displacement and torque of the piezoelectric ACV has been obtained based on the actual size of the bimorph.The testing results showed that the piezoelectric ACV had good stability and consistency on the condition of being driven by 100 V,15 Hz PWM control waveform.It has satisfied the requirements for the intelligent idle air compensation of the electronic carburetor.