发动机废气涡轮增压器控制方式分析

发动机废气涡轮增压器已有相当长的发展,近30年它被作为一种改善汽油机的燃料经济性以及减少排气污染的手段而得到迅速发展。同时增压作为高海拔地区功率恢复的一种措施而显示出了独特的优越性。发动机的动力由燃料燃烧提供的,动力受到每循环燃料的燃烧量限制,每循环燃烧的燃料量受到缸内的空气量的制约。所以提高发动机功率的一个方法是增加进气量,同时燃烧更多的燃料。涡轮增压发动机可以让进气压力提高,从而让更多的空气进入气缸,加大供油量,从而提高功率。

增压发动机进气压力波动控制研究

为解决某涡轮增压发动机在部分转速下出现的增压进气压力、扭矩波动问题,对不同转速下增压器电磁阀至旁通阀执行器的软管内控制压力进行了监测。结果显示软管内控制压力呈现不同程度且周期性的循环偏移;利用在增压器电磁阀控制软管中增加稳压腔结构和优化废气旁通阀气室弹簧刚度,将增压进气压力波动由10%降至3%,对增压器及其控制系统的匹配设计有一定的指导意义。

Design of voltage-controlled dynamic band-pass filter based on VCA810

In order to filter signal effectively according to selective center frequency, a voltage-controlled dynamic band-pass filter with gain compensation was designed based on voltage-controlled gain wideband amplifier VCA810. The transfer function of the filter was analyzed and gain compensation voltages were given through tests; besides, a system was designed, including the gain compensation circuit and the control voltage circuit, etc. Center frequency will change from 1 kHz to 20 kHz according to control voltage on condition that bandwidth of the filter remains constant. The designed system has the advantages of simple structure, low noise, stable performance and convenient adjustment.

专业改装

总部位于英国的Superchips是ECU改装的专业公司，现在它也来到了改装业方兴未艾的中国大陆。