Design and Research on New Gasoline Direct Injection Engine Tumble Combustion Chamber

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Design and Research on New Gasoline Direct Injection Engine Tumble Combustion Chamber

更新时间：2025-07-09

- Design and Research on New Gasoline Direct Injection Engine Tumble Combustion Chamber
- Vol. 46, Issue 11, Pages: 17-22(2012)
- 作者机构：
  
  1. 清华大学汽车工程系,北京,100084
  2. 清华大学汽车安全与节能国家重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK411.2
- Online First：10 November 2012，
  
  Published：2012
- 稿件说明：
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Design and Research on New Gasoline Direct Injection Engine Tumble Combustion Chamber[J]. 2012, 46(11): 17-22.
DOI：

Design and Research on New Gasoline Direct Injection Engine Tumble Combustion Chamber[J]. 2012, 46(11): 17-22. DOI：

摘要

为了获得更加节能、环保和高性能的汽油发动机

设计了一种适用于缸内直喷(GDI)发动机的新型滚流燃烧室

并将这种燃烧室应用于4G15缸内直喷发动机进行了实验研究.该燃烧室通过活塞顶上凸起面的作用

合理地组织了缸内气体流动.计算流体动力学(CFD)仿真分析表明

在不使用垂直向下滚流进气道的情况下

该燃烧室同样可以获得理想的滚流强度.实验结果表明

4G15发动机的稀燃极限可达25～27

其中17～19是效率最高的空燃比区间

该区间的效率较原机提高了10%左右.在理论空燃比的情况下

当废气再循环率(EGR)达到7%时

排放的化学计量可以降低到无EGR情况的20%以下.

Abstract

In order to obtain gasoline engines with high efficiency

low-emission and high performance

a new gasoline direct injection(GDI)engine tumble combustion chamber was designed

and an experiment was conducted with the present combustion chamber on a 4G15 GDI engine. This tumble combustion chamber organizes the in-cylinder flow rationally by optimizing the shape of piston crown. The result of computational fluid dynamics(CFD)analysis indicates that the combustion chamber structure could result in perfect in-cylinder tumble intensity

even without the vertical straight intake port. The test results show that the lean combustion limit of the 4G15 GDI engine can reach 25-27. The most efficient air-fuel ratio range is 17-19 and in this range

and the engine fuel consumption decreases by 10% compared with the original engine. In the case of stoichiometric ratio

emission de

creases to less than 20% of that without EGR when the exhaust gas recirculation(EGR)is 7%.

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references

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