基于模型的新型高效内燃机直喷电液控制器

IF 2.2 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Pier Paolo Brancaleoni, Davide Viscione, Giacomo Silvagni, Vittorio Ravaglioli, Enrico Corti, Gian Marco Bianchi, Matteo De Cesare, Federico Stola
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引用次数: 0

摘要

在过去的几年中,汽车行业开发出了多项适用于提高内燃机(ICE)效率和减少排放的技术。其中,高压喷射系统的采用被认为是优化空气-燃料混合物形成的关键。然而,这些技术的使用也会促进颗粒物质(PM 颗粒物质)的形成,而颗粒物质是增压分层和气缸壁上流体膜的直接结果。因此,为了在不造成缸壁撞击的情况下形成适当的混合气,必须使用连续喷射技术。由于现代汽油直喷(GDI)系统的典型特征是电控喷油器与单个高压轨道相连,因此深入了解两个紧密喷射事件之间的电气和液压效应变得至关重要。本文分析了高压 GDI 系统进行多次喷射时产生的电气和液压效应组合。通过使用专门开发的开放式容器冲洗台,从压力波传播以及喷射器驱动电流曲线的电畸变方面对喷射系统进行了表征。通过对实验数据的分析,除了建立以压力波传播控制为导向的模型外,还校准了残余磁化特征图。最后,还提出了磁化和压力波(MPW)校正策略,该策略可在电子控制单元(ECU)上轻松实施,无需额外的传感器。通过运行 MPW 策略,在所有测试条件下,实际喷射质量与预期喷射质量之间的误差都降低到了 5%以下。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Novel direct injection electro-hydraulic model-based controller for high efficiency internal combustion engines
During the past years, automotive industries developed several technologies suitable to increase efficiency and reduce emissions from Internal Combustion Engines (ICEs). Among them, the adoption of high-pressure injection systems is considered crucial to optimize air-fuel mixture formation. However, the use of these technologies also promotes the formation of particulate matter (PM Particulate Matter), which is a direct result of charge stratification and fluid film on the cylinder walls. Therefore, to obtain a proper mixture formation without the risk of wall impingement, the utilization of consecutive injections is mandatory. Since modern Gasoline Direct Injection (GDI) systems are typically characterized by electrical-actuated injectors connected to a single high-pressure rail, a deep understanding of electrical and hydraulic effects among two close injection events becomes essential. This paper analyzes the combinations of electrical and hydraulic effects that occur in a high-pressure GDI system performing multiple injections. By using a specifically developed open vessel flushing bench, the injection system has been characterized in terms of pressure wave propagation as well as electrical distortions of the driving current profile of the injectors. The analysis of the experimental data has allowed for the calibration of the residual magnetization characteristic map in addition to the development of a pressure wave propagation control-oriented model. Finally, a Magnetization and Pressure Wave (MPW) correction strategy, easily implementable on an Electronic Control Unit (ECU) without the need for additional sensors, has been proposed. By running the MPW strategy, the error between the actual and expected injected mass has been reduced below 5% in all tested conditions.
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来源期刊
International Journal of Engine Research
International Journal of Engine Research 工程技术-工程:机械
CiteScore
6.50
自引率
16.00%
发文量
130
审稿时长
>12 weeks
期刊介绍: The International Journal of Engine Research publishes high quality papers on experimental and analytical studies of engine technology.
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