Modeling and Optimization of Trajectory-Based HCCI Combustion

基于轨迹的 HCCI 燃烧的建模和优化

• 批准号: 1634894
• 负责人: Zongxuan Sun
• 金额: $ 29.75万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1634894&HistoricalAwards=false
• 关键词: Modeling; Optimization; Trajectory; Based; HCCI

This award supports the fundamental study of a new mode of operation for internal combustion engines, made possible through the use of a free piston engine. In a standard automobile engine, the piston positions are fixed by the crankshaft angle. In a free piston engine the piston motions are independently controlled. This control can be used to significantly improve engine efficiency and to accommodate a large variety of alternative fuels. This project could enable a modular, clean and highly efficient power source for hybrid vehicles, and enable the wide use of renewable fuels. Because transportation accounts for about thirty percent of the national energy consumption, these advances could have a major beneficial impact on energy independence and environmental quality. The research objective is to investigate the dynamics and the optimization of a new combustion mode: trajectory-based homogeneous charge compression ignition (HCCI) combustion enabled by the free piston engine. With a free piston engine, the piston motion can be controlled in real-time to actively regulate the cylinder volume, and thereby adjust the gas pressure-temperature history prior, during, and after the combustion event. This extra degree of freedom enables the in-cycle real-time optimization of the chemical reactivity and heat transfer processes of the HCCI combustion. To achieve the above objective, fundamental properties of the in-cylinder processes need to be investigated to gain insights of the influence of the unconstrained gas pressure-temperature history. Both chemical kinetics driven model and control oriented model will be developed to predict the effect of the piston trajectory on the efficiency and emissions of HCCI combustion. On this basis, optimization methods will be developed to achieve the maximum attainable fuel efficiency and emissions benefits by designing the optimal piston trajectory. Experimental work on a prototype free piston engine and a rapid compression and expansion machine will help to validate the modeling and optimization results.

该奖项支持对内燃机新运行模式的基础研究，通过使用自由活塞发动机使之成为可能。在标准的汽车发动机中，活塞的位置是由曲轴角度固定的。在自由活塞发动机中，活塞的运动是独立控制的。这种控制可以用来显著提高发动机效率，并适应各种各样的替代燃料。该项目可以为混合动力汽车提供模块化、清洁和高效的电源，并使可再生燃料得到广泛使用。由于交通运输约占全国能源消耗的30%，这些进步可能对能源独立和环境质量产生重大有益影响。研究的目的是研究一种新的燃烧模式的动力学和优化：基于轨迹的均匀装药压缩点火（HCCI）燃烧。使用自由活塞发动机，可以实时控制活塞运动，主动调节气缸体积，从而调整燃烧前、燃烧中和燃烧后的气体压力-温度历史。这种额外的自由度使HCCI燃烧的化学反应性和传热过程的循环实时优化成为可能。为了实现上述目标，需要研究缸内过程的基本特性，以深入了解无约束气体压力-温度历史的影响。将建立化学动力学驱动模型和控制导向模型来预测活塞轨迹对HCCI燃烧效率和排放的影响。在此基础上，开发优化方法，通过设计最佳活塞轨迹，实现可达到的最大燃油效率和排放效益。在自由活塞发动机样机和快速压缩膨胀机上的实验工作将有助于验证建模和优化结果。

项目成果

A Framework of Control-Oriented Reaction-Based Model for Trajectory-Based HCCI Combustion With Variable Fuels

基于轨迹的可变燃料 HCCI 燃烧的面向控制的反应模型框架

• DOI: 10.1115/dscc2017-5194
• 发表时间: 2017
• 期刊: ASME Dynamic Systems and Control Conference
• 作者: Zhang, Chen;Sun, Zongxuan
• 通讯作者: Sun, Zongxuan

A Control-Oriented Model for Trajectory-Based HCCI Combustion Control

• DOI: 10.1115/1.4039664
• 发表时间: 2018-09
• 期刊: Journal of Dynamic Systems Measurement and Control-transactions of The Asme
• 影响因子: 1.7
• 作者: Chen Zhang;Zongxuan Sun

Investigating Trajectory Based Combustion Control Using a Controlled Trajectory Rapid Compression and Expansion Machine (CT-RCEM)

使用受控轨迹快速压缩和膨胀机 (CT-RCEM) 研究基于轨迹的燃烧控制

• 发表时间: 2020
• 期刊: Proceedings of the ASME Dynamic Systems and Control Conference
• 作者: Tripathi, A.;Sun, Z.
• 通讯作者: Sun, Z.

Realizing Trajectory-Based Combustion Control in a Hydraulic Free Piston Engine via a Fast-Response Digital Valve

通过快速响应数字阀在液压自由活塞发动机中实现基于轨迹的燃烧控制

• DOI: 10.1115/dscc2018-9057
• 发表时间: 2018
• 期刊: Proceedings of the 2018 ASME Dynamic Systems and Control Conference
• 作者: Zhang, Chen;Sun, Zongxuan
• 通讯作者: Sun, Zongxuan

Trajectory-based combustion control for renewable fuels in free piston engines

• DOI: 10.1016/j.apenergy.2016.11.045
• 发表时间: 2017-02
• 期刊: Applied Energy
• 影响因子: 11.2
• 作者: Chen Zhang;Zongxuan Sun