eq491发动机是东风汽车集团从德国福特公司引进的化油器式发动机，主要用于轻型载货(客)车。为了满足我国将于2000年实施的新的排放法规，采用电控燃油喷射(efi)加三效催化器c)已势在必行。为保证化油器式发动机改电喷机型后不但排放水平要达标，而且动力性和经济性也要有一定程度的提高，根据国外经验，必须重新设计原发动机的进排气系统。过去的经验设计法是一种试凑法，设计周期长，消耗大，难以得出佳设计方案，无法满足现代内燃机设计要求。

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RORZE：步进电机驱动器RD-023MS
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近年来，随着计算机技术的发展，计算流体力学(cfd)软件在发动机工作过程的研究中得到广范应用［1］，大大缩短了发动机的研究开发周期。本文采用的gt—power是一个基于window操作系统的适合分析各种发动机性能的cfd软件［2］，它以一维流体动力学为基础，用有限体积法进行数值计算，充分考虑了因可燃混合气的组份不同导致其热力学性质的差异，而且能用于研究一些进排气系统结构因素(如分歧、合流和弯曲等部分)对流动的影响；此外它应用数学优化方法进行参数寻优，使得对发动机进行不需要人为经验控制的优化设计成为可能。本文利用该软件对eq491电喷发动机的进排气系统结构参数进行了匹配优化计算，以期从理论上指导发动机的改型设计。
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6ES7291-8BA20-0XA0????4

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静电计 S-131-001-43(RS131ER)     1个
电离室PCB板  RS-131   1个
MR-H350B-S67 翻新或二手   1个