Analysis Research for Low Emission Spray Combustion via Fuel Injection Rate Control

喷油量控制低排放喷雾燃烧分析研究

• 批准号: 11450084
• 负责人: MATSUI Yukio
• 金额: $ 4.35万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450084/
• 关键词: Fuel Injection System; Common Rail; Intermittent Injection; Injection Rate Control; Ignition Delay; Unsteady Diffusion Combustion; Diesel Engine; Rapid Compression Machine

A new fuel injection system was developed at first based on a common rail injection system in this research. Prior to this development, numerical simulation code was made in order to estimate the effects of main elementary parts within this injector and the estimation of the additional pressure booster unit. As a result, the control space volume which is formed at the top of the needle rod and the inlet/outlet orifice diameter which are located in the control volume play important parts, whereas the common rail volume or the length of high pressure tube between the common rail and the injector have no great influence on injection pressure and injection shape.By the construction of pressure booster, maximum fuel injection pressure has reached 175 MPa. And as to injection rate control, pilot injection, split injection and multiple divided injection were realized by means of the system control program. This system was attached to a rapid compression machine, and single shot combustion tests were performed. This experiment clarified that the ignition delay period is shortened along with the increase of injection pressure in the examined pressure range, and also earlier injection fuel in multiple divided injection made a higher combustion pressure rise rate.After this experiment, this combustion test apparatus was applied to estimate the heat loss phenomena-in diesel combustion. The heat loss to the combustion chamber wall was apparently affected by orifice diameter and hole number of the injector.

本研究首先在共轨喷射系统的基础上开发了一种新的燃油喷射系统。在此之前，为了估计该喷油器内主要基本部件的影响和估计附加压力增压单元，编写了数值模拟代码。因此，针杆顶部形成的控制空间体积和位于控制体积内的进/出口孔直径对喷射压力和喷射形状影响不大，而共轨体积或共轨与喷油器之间的高压管长度对喷射压力和喷射形状影响不大。通过增压器的结构，最大燃油喷射压力达到175 MPa。在喷油速率控制方面，通过系统控制程序实现了先导喷油、分段喷油和多次分段喷油。将该系统连接到快速压缩机上，进行了单枪燃烧试验。实验表明，在测试压力范围内，随着喷射压力的增加，点火延迟期缩短，并且在多次分喷时，更早的喷射燃料使燃烧压力上升率更高。在此基础上，利用该燃烧试验装置对柴油机燃烧过程中的热损失现象进行了研究。喷油器孔直径和孔数对燃烧室壁面热损失有明显影响。

项目成果

木村修二,松井幸雄 他2名: "小形直噴ディーゼル機関の新燃料コンセプト"自動車技術会論文集. 30・2. 23-28 (1999)

Shuji Kimura、Yukio Matsui 等 2 人：“小型直喷柴油发动机的新燃料概念”日本汽车工程师学会会刊 30・2（1999 年）。

H.Kosaka,V.H.Drewes,L.Catalfamo 他3名: "Two-Dimensional Imaging of Formaldehyde Formed During the Ignition Process of a Diesel Fuel Spray"SAE Technical Paper Series. 2000-01-0236. 1-13 (2000)

H. Kosaka、V. H. Drewes、L. Catalfamo 和其他 3 人：“柴油喷雾点火过程中形成的甲醛的二维成像”SAE 技术论文系列 2000-01-0236 (2000)。

Kosaka, H., V.H.Drewes et al: "Two-Dimensional Imaging of Formaldehyde Formed During the Ignition Process of a Diesel Fuel Spray"SAE Technical Paper Series. No. 2000-01-0236. 1-13 (2000)

Kosaka, H.、V.H.Drewes 等人：“柴油喷雾点火过程中形成的甲醛的二维成像”SAE 技术论文系列。

Kimura, S., Matsui, Y.et al: "A New Concept of Combustion Technolohgy in Small DI Diesel Engines (4th Report)"JSAE Transaction. vol. 30, No. 2. 23-28 (1999)

Kimura, S.、Matsui, Y.等人：“小型直喷式柴油机燃烧技术的新概念（第四次报告）”JSAE Transaction。

木村真,松井幸雄,小酒英範: "LESによる非定常噴霧流の数値解析"日本学術会議 第49回理論応用力学機講演会前刷集. 151-152 (2000)

Makoto Kimura、Yukio Matsui、Hidenori Kozake：“使用 LES 对非定常喷雾流进行数值分析”日本科学委员会第 49 届理论与应用力学会议预印本集 151-152（2000 年）。