摘要：为了改善高比转速下增压器的涡轮性能，本文为匹配Ｊ６１１０Ｚ柴油机的ＨＩＦ增压器设计了混流涡轮．设计中采用了结合叶轮准三元流动分析的涡轮性能预测新方法．混流涡轮的性能试验结果显示，与径流涡轮相比，混流涡轮流通能力更大，并且能在更低的速度比ｕ／ｃｏ下得到更高的涡轮峰值效率．

摘要：将一台 CY6 10 5 Q柴油机改造为点燃式单燃料天然气发动机。该发动机采用了电控多点燃气顺序喷射以及电控高能点火等新技术 ,同时对发动机的进气系统、燃烧系统等进行了优化设计。试验结果表明 ,经改进设计的天然气发动机的动力性与原机相当 ,低速转矩特性明显改善 ,排放性能指标达到了欧洲 号标准。由于使用廉价的天然气 。

摘要：利用任意拉格朗日 -欧拉 (AL E)计算方法对基于“等环量”理论并考虑气体粘性而设计的蜗牛式压气机蜗壳进行了数值模拟。模拟计算结果与试验所测得的结果基本吻合 ,证明利用本计算程序所进行的数值模拟是可行的 。

摘要：为满足大多数柴油机排气流量的要求 ,必须扩大单管静电旋风捕集器所能处理的排气流量。在研究了用于柴油机的静电旋风捕集器的清灰方案之后 ,分析了多种结构方案 ,确立了多个单管静电旋风捕集器并联的方案 ,并设计制造了多管并联的静电旋风捕集器。试验结果表明 ,该多管静电旋风捕集器具有高捕集效率、低排气背压、大流量及可有效清灰等特点。

摘要：为了避免综合传动装置在扭转振动时发生共振 ,需要对传动装置的结构参数进行重新设计、修改。一个复杂的传动装置中 ,修改哪些结构参数才能有效地改变系统的固有频率是不易确定的。文中建立某综合传动系统的多自由度质量—弹性—阻尼动力学模型 ,根据复模态振动理论求解该系统在某一挡位下的振动模态 ,并进行振动频率对系统结构参数的敏感度分析 ,从 3 3个结构参数中选出 4个进行修改 。

摘要：气缸盖是发动机中最大、最复杂的零部件之一。结构的复杂性使得在气缸盖设计中应用CAD技术受到很大限制。目前 ,气缸盖CAD系统的开发在国内仍属空白。本文以I DEASMaster 6 0为开发平台 ,充分挖掘OpenIdeas功能 ,综合应用参数化特征建模技术、面向对象技术和数据库技术 ,开发了“高速大功率车用柴油机气缸盖CAD系统”(实际上是一个三维建模、二维绘图及有限元结构分析、优化的集成系统 ) 。

摘要：高效微型燃气轮机发电机组可用于航空、航天等领域 ,还可用于分布式发电、军用车辆辅助动力装置、车用混合动力装置等 ,因此研究这种动力装置有很重要的实用意义。首先介绍了微型燃气轮机的发展过程 ,简要说明了过去 40年内微型燃气轮机在结构上发生的变化。随后给出了组成微型燃气轮机的关键部件在设计过程中应注意的一些问题。最后回顾了国内一些研究单位在这一领域所进行的研究工作 ,并指出了今后的努力方向和工作重点。

摘要：The shape optimization is studied by adopting the domain integrated method which is based on the calculus of variations during the shape design sensitivity analysis. A new method of improving the efficiency of the design velocity field analysis and the quality of the finite element method (FEM) mesh is put forward. The sensitivity analysis which is based on the calculus of variations is used in the shape optimization. The design velocity field is solved by Herrmann method. An example shows that both the quality of the FEM mesh and the efficiency of the computing of the design velocity field are improved by Herrmann method. So the effect and the efficiency of the shape optimization are guaranteed. If using sensitivity analysis which is based on the calculus of variations in the shape optimization, the sensitivity analysis can be a relatively independent module. The efficiency of computing the design velocity field and the quality of mesh will be improved by using Herrmann method.

摘要：Design of internal combustion engine (ICE) components is one of the earliest and also the most active areas in which computer aided modeling techniques are applied. Computer aided modeling techniques could provide requisite information for follow up designing segments such as structural analysis, design of technological process and manufacturing etc, and thereby lead to the reduction of product design period and the quality and reliability improvement of ICE components. So the developing situations of ICE components' 2 D drafting, 3 D modeling of ICE, overall CAD of ICE as well as component design expert system etc. are surveyed, which are the typical applications of computer aided modeling techniques in ICE component design process, and some existent problems and tasks are pointed out so as to make some references for the further research work.

摘要：Friction and lubrication simulation analysis of internal combustion engine bearings are studied. A series of software implementary precepts for mathematical modeling, to analytic calculating and realizing simulation outcome are brought forward. As a dynamic simulating technique is introduced into the process of engine bearing design, simulation models of the oil film are built and the emulational analysis of the shaft center track is carried out. A software program package “Engine Bearing Friction and Lubrication Dynamic Simulation System” is developed to realize the real time simulation of the working status of bearing during the design process. Through developing virtualized products, the defects of the product design can be found in time and improve the products at once. Thus the purpose of predicting and controlling the cost, quality and design period of the products can be achieved.