Effect of Injection Strategy on Gasoline/PODE dual-fuel Combustion Under High Load

王伟男; 张光德; 钱大伟

doi:10.13433/j.cnki.1003-8728.20230309

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Effect of Injection Strategy on Gasoline/PODE dual-fuel Combustion Under High Load

更新时间：2026-04-23

- Effect of Injection Strategy on Gasoline/PODE dual-fuel Combustion Under High Load
- Mechanical Science and Technology for Aerospace Engineering Vol. 44, Issue 8, Pages: 1317-1325(2025)
- 作者机构：
  
  1. 武汉科技大学机构汽车与交通工程学院,武汉,430081
  2. 上海交通大学动力机械与工程教育部重点实验室机构,上海,200030
- 作者简介：
- 基金信息：
- DOI：10.13433/j.cnki.1003-8728.20230309
  CLC：
- Published：2025
- 稿件说明：
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王伟男, 张光德, 钱大伟. Effect of Injection Strategy on Gasoline/PODE dual-fuel Combustion Under High Load[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(8): 1317-1325.
DOI：

王伟男, 张光德, 钱大伟. Effect of Injection Strategy on Gasoline/PODE dual-fuel Combustion Under High Load[J]. Mechanical Science and Technology for Aerospace Engineering, 2025, 44(8): 1317-1325. DOI： 10.13433/j.cnki.1003-8728.20230309.

摘要

为更好优化PODE-汽油双燃料燃烧特性，通过改变其汽油直喷比例和汽油直喷时刻，在利用软件进行数值模拟，研究结果表明：在大负荷工况下，汽油缸内直喷比例在10%到30%时，缸压峰值高于单一气道喷射，且燃烧性能指标都有所提升。当直喷比例高于30%后，缸压峰值降低，燃烧性能指标降低;汽油相对晚喷情况下（−40°～−70°），随着喷射时刻的提前，燃烧始点推迟，缸压峰值降低，放热率峰值降，汽油相对早喷情况下（−80°～−110°），随着喷射时刻的提前，燃烧均呈现双峰状态，汽油缸内混合气分层更明显，狭隙区域形成较浓汽油混合气，使燃烧区域更广，有助于降低HC和CO的排放。

Abstract

In order to better optimize the combustion characteristics of PODE-gasoline dual fuel

by changing the proportion of gasoline direct injection and the moment of gasoline direct injection

the combustion characteristics of PODE-gasoline dual fuel vehicles is simulated using software. The result shows that under large-load conditions

when the proportion of gasoline direct injection in the cylinder is 10% to 30%

the peak pressure of the cylinder is higher than that of the single airway injection

and the combustion performance index is improved; When the direct injection ratio is higher than 30%

the peak pressure of the cylinder is reduced and the combustion performance index is reduced; In the case of gasoline relatively late injection (−40° to −70°)

with the advance of the injection moment

the combustion start point is delayed

the peak cylinder pressure is reduced

the peak of the heat release rate is reduced; and the gasoline is relatively early injection (−80° to −110°)

with the advance of the injection moment

the combustion is in a bimodal state

the gasoline cylinder mixture is more layered

and a concentrated gasoline mixture is formed in the narrow area

which makes the combustion area wider and helps to reduce HC and CO emissions.

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