预燃室射流点火对汽油机性能影响研究

江枭枭; 杜家坤; 陈泓; 李钰怀; 罗亨波; 冶麟

doi:10.13433/j.cnki.1003-8728.20200550

预燃室射流点火对汽油机性能影响研究

doi: 10.13433/j.cnki.1003-8728.20200550

广州汽车集团股份有限公司汽车工程研究院，广州　511434

基金项目: 国家科技部重点项目（2017yFB0103300）

详细信息

作者简介:
江枭枭（1991−），工程师，硕士研究生，研究方向为内燃机燃烧开发，jiangxiaoxiao@gacrnd.com

通讯作者:
陈泓，高级工程师，博士研究生，chenhong@gacrnd.com

中图分类号: TG156
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- 文章访问数: 126
- HTML全文浏览量: 82
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-20
- 网络出版日期: 2023-02-16
- 刊出日期: 2022-12-05

Effect of Prechamber Jet Ignition on Gasoline Engine Performance

GAC Automotive Research & Development Center, Guangzhou 511434, China

摘要

摘要: 通过试验手段对比分析了预燃室射流点火模式及火花塞点火模式（SI）对燃烧性能的影响，结果表明：SI点火模式的发动机受高负荷爆震的限制，仅在中等负荷达到最佳的油耗率和热效率。压缩比（CR）的增加仅在中小负荷对油耗率和热效率有改善效果；相比于SI点火模式，预燃室射流点火模式可实现更快的燃烧速度和火焰传播速度，对SI发动机的爆震有较好的抑制效果，在中等负荷具有更低的油耗率和更高的热效率，但在低负荷及高负荷阶段，油耗率和热效率恶化；采用预燃室射流点火模式，能有效增加缸内燃烧速率，减轻CA50推迟对油耗率恶化的效果，通过提高压缩比实现降低油耗率的潜力和效果更好。
- 被动预燃室 /
- 火花点火模式 /
- 压缩比 /
- 压力振荡 /
- 油耗
Abstract: In this study, the influence of passive prechamber jet ignition mode and spark plug ignition mode (SI) on combustion performance was compared and analyzed by tests. The results showed that: SI engine was limited by detonation under high load, it achieved the best fuel consumption rate and thermal efficiency only under medium load. The fuel consumption and thermal efficiency were promoted with increase of compression ratio (CR) under small and medium loads. Compared with SI mode, passive prechamberjet ignition mode can achieve faster burning velocity and flame propagation speed, so it had good inhibition effect of SI detonation, resulting in lower fuel consumption ratio and higher thermal efficiency under medium load. But the fuel consumption rate and thermal efficiency of passive prechamber jet ignition deteriorated under low and high load. Incylinder combustion rate can be effectively increased when using passive prechamberjet ignition, so the bad effect of CA50 delay on fuel consumption can be weakened, especially the potential and effect of increasing the compression ratio to reduce fuel consumption were better when using passive prechamberjet ignition mode.
- passive prechamber /
- spark plug ignition /
- compression ratio /
- pressure oscillation /
- fuel consumption

HTML全文

图 1 试验台架示意图

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图 2 不同压缩比下指示热效率和油耗率随IMEPH的变化

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图 3 不同压缩比下燃烧相位、滞燃期、燃烧持续期及燃烧循环变动率随IMEPH的变化规律

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图 4 不同点火模式下CA50和燃烧持续期随IMEPH的变化

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图 5 燃烧循环变动率随IMEPH的变化规律

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图 6 不同点火模式下缸内压力和放热率的变化

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图 7 不同点火模式下净指示热效率和油耗随IMEPH的变化

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图 8 爆震发生时不同点火模式下的缸压、放热率对比

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图 9 不同压缩比下燃烧相位、滞燃期、燃烧持续期及燃烧循环变动率随IMEPH的变化规律

下载: 全尺寸图片幻灯片

图 10 不同压缩比下指示热效率和油耗随IMEPH的变化

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表 1 发动机主要参数

参数	数值
型式	单缸、四冲程
缸径/mm	79
冲程/mm	102
排量/L	0.5
喷油方式	缸内直喷
燃油供给系统	35 MPa高压供油系统

下载: 导出CSV

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