文档介绍：成都电子机械高等专科学校成教院
毕业设计(论文)
论文题目: 论汽车涡轮增压及取代涡轮增压的技术
教学点: 重庆科创职业学院
指导老师: 职称: 讲师
学生姓名: 学号: 1112418162
专业: 汽车检测与维修技术
成都电子机械高等专科学校成教院制
二零一二年四月二日
摘要
我涡轮增压发动机是依靠涡轮增压器来加大发动机进气量的一种发动机,涡轮增
压器(Tubro)实际上就是一个空气压缩机。它是利用发动机排出的废气作为动力来推动涡轮室内的涡轮(位于排气道内),涡轮又带动同轴的叶轮位于进气道内,叶轮就压缩由空气滤清器管道送来的新鲜空气,再送入气缸。当发动机转速加快,废气排出速度与涡轮转速也同步加快,空气压缩程度就得以加大,发动机的进气量就相应地得到增加,就可以增加发动机的输出功率了。
涡轮增压发动机的最大优点是它可在不增加发动机排量的基础上,大幅度提高发动机的功率和扭矩。一台发动机装上涡轮增压器后,其输出的最大功率与未装增压器相比,可增加大约40%甚至更多。
涡轮增压有三种
废气涡轮增压
机械涡轮增压
电动涡轮增压
气缸增压取代涡轮增压,实现小排量大功率。
全新理念的气缸压缩供气系统增压发动机
气缸增压系统的设计已经突破了传统压缩比的观念,根据发动机的需要,活塞气缸的压缩比范围从10倍到100倍之间可变,可以满足超高压直喷汽油均质压燃(HCCI)的发动机要求, 以往的可变压缩比,设计复杂,效率低下,我设计的这款可变压缩比,即高效又简洁而且同步,使发动机进入全新的设计理念时代
Abstract
Reference to international standards (TOC), the economic evaluation of proposed methods of transformers, and gives examples of the calculation. The results showed that the use of S9-based type is more economic than S7; with S9 in service-type to replace the "64" and "73" series of high-loss transformers, investment return period of 2~3 years。
Transformer economic operation is the transmission of electricity under the same conditions, the best to run through the best way to select and adjust the load so that minimum loss of power transformers. In other words, the economy is to give full play to the transformer performance, a reasonable choice of operation mode, thus reducing electricity consumption. Transformer economic operation depends not only on the way the economy, but also depends on the level of transformer accordance with the regular load transformers can generally be divided into four cases: First, are often full or near full load operation of the transformer; second is most often set to run in the transformer; third less often run half load transformer; Fourth, often light or set of transformer no-load operation. As the excitation current generated in the transformer core to be caused by alternating ic hysteresis loss and eddy current losses。 Eddy current losses are induce