Combustion Optimization for Jet Ignition Direct Injection Gasoline Engine

被引：0
|
作者：
Zhao Z. [1 ]
Qi Y. [2 ]
Tian N. [3 ]
Zhang Y. [3 ]
Liu C. [3 ]
Yao Y. [3 ]
Wang Z. [1 ]
机构：
[1] School of Vehicle and Mobility, Tsinghua University, Beijing
[2] California Institute of Technology, Pasadena, 91125, CA
[3] Dongfeng Motor Technical Center, Wuhan
来源：
Wang, Zhi (wangzhi@tsinghua.edu.cn) | 1631年 / SAE-China卷 / 43期
关键词：
Direction injection; Dual injection strategy; Gasoline engine; Jet ignition;
D O I：
10.19562/j.chinasae.qcgc.2021.11.008
中图分类号：
学科分类号：
摘要：
Jet ignition technology is an effective way to achieve lean burn and improve thermal efficiency of the engine. In this paper, a jet igniter is installed on a multi-cylinder gasoline engine to carry out jet ignition combustion optimization through different injection strategies. Firstly, the minimum fuel consumption operation point is determined within the high efficiency range of the original engine working with conventional spark ignition. Then, based on the selected working condition, the effect of single and dual injection strategies on fuel consumption of jet ignition is studied, and key parameters of dual injection strategy are optimized. Finally, the combustion and emission characteristics of different injection strategies and ignition methods are further compared. The results show that compared with spark ignition the fuel consumption of the engine is reduced by jet ignition, especially when combined with dual injection strategy during the intake stroke, with the minimum fuel consumption rate of the engine reduced by 4 g·(kW·h)-1. The emission of CO and THC of jet ignition is basically the same as that of spark ignition, but NOx emission is higher. Compared with single injection strategy, using dual injection strategy can result in lower NOx emission. © 2021, Society of Automotive Engineers of China. All right reserved.
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页码：1631 / 1637
页数：6
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