The Effects of Operating Conditions and Direct Injection Timing on the Particulates Emissions in a Dual-Injection Gasoline Engine

被引：0

作者：

Chen W. ^{[1
]}

Xia C. ^{[1
]}

Mao K. ^{[1
]}

Tao J. ^{[1
]}

Fang J. ^{[1
]}

Huang Z. ^{[1
]}

机构：

[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai

来源：

Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2019年 / 53卷 / 11期

关键词：

Direct-injection; Direct-injection timing; Dual-injection gasoline engine; Particle size distribution; Particulate emissions;

D O I：

10.16183/j.cnki.jsjtu.2019.11.001

中图分类号：

学科分类号：

摘要：

A DMS500 fast particulate spectrometer was employed to explore the particle emissions characteristics of a dual-injection gasoline engine. The main goal is to investigate the effects of operating conditions (speed and load ) and direct injection timings on the particle size distributions and particulate emissions in steady state conditions. The experimental results indicate that the combustion characteristics of dual-injection are similar to that of the direct-injection mode at low loads. While at middle and high loads, the peak of in-cylinder pressure curve of dual-injection is a little higher than that of the direct-injection mode. Dual-injection yields great particulate emissions reduction. As the speed and load rise, the particulate emissions of dual-injection gradually increase. At middle and high loads, the particulate emission improvement of dual-injection with 50% fuel directly injected declines significantly. Compared to the direct-injection mode, the particle size distributions of dual-injection tend to shift towards the smaller size region. There exists the best injection timing for the direct-injection mode to yield the lowest particulate emissions. For the dual-injection mode, the best direct injection timing is much closer to the exhaust top dead center than that of the direct-injection mode. © 2019, Shanghai Jiao Tong University Press. All right reserved.

引用

页码：1269 / 1275

页数：6

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