汽油机两级增压系统的匹配与性能研究

发布时间：2018-01-13 01:29

本文关键词：汽油机两级增压系统的匹配与性能研究　出处：《内燃机工程》2016年01期 　论文类型：期刊论文

【摘要】：在某单级涡轮增压汽油机的基础上,围绕提升低速扭矩及改善涡轮迟滞效应进行了复合增压系统、两级涡轮增压系统匹配方法研究。采用GT-Power软件建立某汽油机单级涡轮增压与两级增压发动机(复合增压发动机和两级涡轮增压发动机)仿真模型,并借助实测结果进行校核。在此基础上,利用模拟计算结果对单级涡轮增压和两级增压系统的低速扭矩特性、动态响应特性和燃油经济性进行比较分析。研究结果表明:复合增压与两级涡轮增压发动机的低速扭矩特性比单级涡轮增压发动机分别增加了62.80%和54.35%,燃油经济性分别减少了23.45%和22.71%;动态响应特性由优到劣依次为复合增压、两级涡轮增压、单级涡轮增压发动机,并且在1 500r/min(低速区域)三者动态响应特性差距最为明显。
[Abstract]:On the basis of a single stage turbocharged gasoline engine, a composite turbocharging system is developed to improve the low speed torque and improve the hysteresis effect of the turbine. Study on the matching method of Two-stage turbocharging system. The establishment of a single stage turbocharged engine and a two-stage turbocharged engine (composite turbocharged engine and two-stage turbocharged engine) using GT-Power software. Simulation model. Based on the experimental results, the low speed torque characteristics of single-stage turbocharging and two-stage turbocharging systems are simulated. The dynamic response characteristics and fuel economy are compared and analyzed. The results show that:. The low-speed torque characteristics of the combined turbocharged and two-stage turbocharged engines are 62.80% and 54.35% higher than that of the single-stage turbocharged engines, respectively. The fuel economy decreased by 23.45% and 22.71 respectively. The dynamic response characteristics are in the order of composite supercharging, two-stage turbocharging, single-stage turbocharged engine, and the difference of dynamic response characteristics is the most obvious in the low speed region of 1 500 r / min.
【作者单位】：湖南大学先进动力总成技术研究中心;湖南奔腾动力科技有限公司;
【基金】：国家“八六三”高技术研究发展计划项目(2012AA111703;2012AA111801)
【分类号】：TK413.5
【正文快照】： 0概述增压、降排量是主流车用汽油机的发展方向,增压能够提高发动机的升功率和平均有效压力,在保持汽车动力性不受影响的前提下可以改善燃油经济性和排放[1-4]。在全球石油资源逐渐枯竭及汽车排放法规日趋严格的大背景下,发动机增压技术在节能减排方面的潜力愈加受到重视[5-6]

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