某型高强化柴油机米勒循环特性及㶲流分析

doi:10.3901/JME.2025.08.297

机械工程学报 ›› 2025, Vol. 61 ›› Issue (8): 297-307.doi: 10.3901/JME.2025.08.297

• 可再生能源与工程热物理 • 上一篇

扫码分享

某型高强化柴油机米勒循环特性及㶲流分析

王密琪¹, 张付军¹, 吕航¹, 李志鹏², 张翔宇², 商显赫¹

1. 北京理工大学系统与动力工程研究所北京 100081;
2. 中国北方发动机研究所总体一部天津 300400

收稿日期:2024-05-11 修回日期:2024-12-21 发布日期:2025-05-10
作者简介:王密琪，男，1997年出生，博士研究生。主要研究方向为发动机性能优化及热管理。E-mail：2584134198@qq.com;张付军(通信作者)，男，1966年出生，教授，博士研究生导师。主要研究方向为动力传动系统一体化控制、内燃机总体理论与技术、动力机械电子控制、内燃机环境污染与控制。E-mail：zfj123@bit.edu.cn

Characteristic and Exergy Flow Analysis of Miller Cycle in High-strength Diesel Engine

WANG Miqi¹, ZHANG Fujun¹, Lü Hang¹, LI Zhipeng², ZHANG Xiangyu², SHANG Xianhe¹

1. School of Systems and Power Engineering, Beijing Institute of Technology, Beijing 100081;
2. Overall Department I, China North Engine Research Institute, Tianjin 300400

Received:2024-05-11 Revised:2024-12-21 Published:2025-05-10

摘要/Abstract

摘要： 针对高强化柴油机在高负荷工况下米勒循环特性不明确及其优化潜力未充分探索的问题，在高强化柴油机上实施进气门晚关米勒循环的试验与仿真，基于热力学原理及试验数据，深入分析不同转速全负荷工况下柴油机的能量流、㶲流平衡及其变化规律。通过GT-suite构建一维热力学模型，调节进气门晚关角实现米勒循环，以优化其性能。研究结果表明，随着进气门关闭时刻的推迟，发动机的杂项损失逐渐减少，有效功率得以提升，燃油消耗率降低，其中米勒相位为10V84时性能最优；此外，米勒循环还提高了动力㶲的占比，同时降低了循环过程中的传热㶲和㶲破坏量；通过分析㶲变化项随曲轴转角的变化规律，发现米勒循环可以优化压缩及进排气过程从而提高累计动力㶲，降低燃烧阶段的瞬时传热㶲来降低累积传热㶲。

关键词: 高强化柴油机, 米勒循环, 能量平衡, 㶲平衡, 㶲变化项

Abstract: In response to the problem of unclear performance characteristics and insufficiently explored optimization potential of the Miller cycle in highly intensified diesel engines under high-load conditions, experiments and simulations of the late intake valve closing(LIVC) Miller Cycle on highly intensified diesel engines are conducted. Based on thermodynamic principles and experimental data, a thorough analysis is performed on the energy flow, exergy flow balance, and their variation patterns across various engine speeds under full-load conditions. A one-dimensional thermodynamic model is constructed using GT-suite, and the LIVC angle is adjusted to implement the Miller cycle aiming to optimize engine performance. The research results indicate that the delayed closing of the intake valve leads to a gradual decrease in the engine's miscellaneous losses, an improvement in brake power, and a reduction in fuel consumption rate, achieving optimal performance at a Miller phase of 10V84. In addition, the proportion of dynamic exergy is improved, the heat transfer exergy and exergy destruction are reduced through the Miller cycle. By analyzing the variation law of exergy change items with crank angle, it is found that Miller cycle can optimize the compression, intake and exhaust processes to improve the cumulative dynamic exergy and reduce the instantaneous heat transfer exergy in the combustion stage, thus the cumulative heat transfer exergy is reduced accordingly.

Key words: high-strength diesel engines, miller cycle, energy balance, exergy balance, exergy variation terms

中图分类号:

TK421

王密琪, 张付军, 吕航, 李志鹏, 张翔宇, 商显赫. 某型高强化柴油机米勒循环特性及㶲流分析[J]. 机械工程学报, 2025, 61(8): 297-307.

WANG Miqi, ZHANG Fujun, Lü Hang, LI Zhipeng, ZHANG Xiangyu, SHANG Xianhe. Characteristic and Exergy Flow Analysis of Miller Cycle in High-strength Diesel Engine[J]. Journal of Mechanical Engineering, 2025, 61(8): 297-307.

参考文献

[1] 魏胜利，刘鑫，冷先银，等. 进气门晚关米勒循环对柴油机燃烧和排放影响的研究[J]. 兵工学报，2015，36(8)：1385-1390. WEI Shengli，LIU Xin，LENG Xianyin，et al. Research on effect of late intake valve closing Miller cycle on combustion and emissions of diesel engine[J]. Acta Armamentarii，2015，36(8)：1385-1390.
[2] 何旭，李彦凯，石永昊，等. 不同燃油温度下柴油机喷嘴空穴流动特性试验研究[J]. 机械工程学报，2018，54(22)：177-183. HE Xu，LI Yankai，SHI Yonghao，et al. Experimental study of the cavitation flow characteristics in diesel engine nozzle under different injection temperatures[J]. Journal of Mechanical Engineering，2018，54(22)：177-183.
[3] AL-SARKHI A，JABER J O，PROBERT S D. Efficiency of a Miller engine[J]. Applied Energy，2006，83(4)：343-351.
[4] CHEN L G，ZHU F L，SHI S S，et al. Power and efficiency optimizations of Maisotsenko-Atkinson，Dual and Miller cycles and performance comparisons with corresponding traditional cycles[J]. Sci. China Tech. Sci.，2023，66：3393-3411,
[5] GONCA G，SAHIN B，PARLAK A，et al. Theoretical and experimental investigation of the Miller cycle diesel engine in terms of performance and emission parameters[J]. Applied Energy，2015，138(1)：11-20.
[6] WANG Y，LIN L，ROSKILLY A P，et al. An analytic study of applying Miller cycle to reduce NO_x emission from petrol engine[J]. Applied Thermal Engineering，2007，27(11-12)：1779-1789.
[7] WANG Z，SHUAI S，LI Z，et al. A review of energy loss reduction technologies for internal combustion engines to improve brake thermal efficiency[J]. Energies，2021，14(20)：6656.
[8] ZHAO J. Research and application of over-expansion cycle (Atkinson and Miller) engines-A review[J]. Applied Energy，2017，185(1)：300-319.
[9] LI T，GAO Y，WANG J，et al. The Miller cycle effects on improvement of fuel economy in a highly boosted，high compression ratio，direct-injection gasoline engine：EIVC vs. LIVC[J]. Energy Conversion and Management，2014，79：59-65.
[10] 朱轶林，李惟毅，孙冠中. 冷却水耗功对有机朗肯循环影响的热力学分析[J]. 机械工程学报，2018，54(18)：180-186. ZHU Yilin，LI Weiyi，SUN Guanzhong. Thermodynamic analysis of an organic rankine cycle with cooling water power consumption considered[J]. Journal of Mechanical Engineering，2018，54(18)：180-186.
[11] SAXENA S，DARIO BEDOYA I，SHAH N，et al. Understanding loss mechanisms and identifying areas of improvement for HCCI engines using detailed exergy analysis[J]. Journal of Engineering for Gas Turbines and Power，2013，135(9)：091505.
[12] MAHABADIPOUR H，SRINIVASAN KK，KRISHNAN SR，et al. Crank angle-resolved exergy analysis of exhaust flows in a diesel engine from the perspective of exhaust waste energy recovery[J]. Applied Energy，2018，216：31-44.
[13] LIU C，LIU Z，TIAN J，et al. Comprehensive investigation of injection parameters effect on a turbocharged diesel engine based on detailed exergy analysis[J]. Applied Thermal Engineering，2019，154：343-357.
[14] LIU C，LIU Z，TIAN J，et al. Detailed study of key boundary parameters influence on a turbocharged diesel engine based on thermodynamic analysis[J]. Applied Thermal Engineering，2020，165：114553.
[15] 王子玉，张岩，王雷，等. 进气门晚关米勒循环对高强化柴油机燃烧和换气影响的研究[J]. 兵工学报，2019，40(1)：9-18. WANG Ziyu，ZHANG Yan， WANG Lei，et al. Effect of LIVC Miller cycle on combustion and gas exchange on a highly intensified single-cylinder diesel engine[J]. Acta Armamentarii，2019，40(1)：9-18.
[16] ALALO AMA，BABAIE M，SHIRNESHAN A，et al. Exergy and energy analysis during cold-start and warm-up engine operation[J]. Fuel，2022，330：125580.
[17] 米雪，刘晓日，周晶晶，等. 柴油机缸内近壁面传热模型的研究[J]. 内燃机与动力装置，2017，34(1)：36-39. MI Xue，LIU Xiaori，ZHOU Jingjing，et al. An in-cylinder near wall heat transfer model for diesel engine[J]. Internal Combustion Engine and Powerplant，2017，34(1)：36-39.
[18] LUCIA U. Entropy and exergy in irreversible renewable energy systems[J]. Renewable and Sustainable Energy Reviews，2013，20：559-564.
[19] 丁乐康，刘永峰，毕贵军，等. 液氧固碳闭式循环柴油机着火机理研究[J]. 机械工程学报，2023，59(16)：370-378. DING Lekang，LIU Yongfeng，BI Guijun，et al. Study on the ignition mechanism of closed cycle diesel engine system with liquid oxygen carbon sequestration[J]. Journal of Mechanical Engineering，2023，59(16)：370-378.
[20] COSTA V A F. On the exergy balance equation and the exergy destruction[J]. Energy，2016，116(1)：824-835.

某型高强化柴油机米勒循环特性及㶲流分析

Characteristic and Exergy Flow Analysis of Miller Cycle in High-strength Diesel Engine

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 2

编辑推荐

Metrics

本文评价

[1]	李耀明;王显仁;徐立章. 基于能量平衡的水稻谷粒脱粒损伤[J]. , 2007, 43(3): 160-164.
[2]	秦国梁;林尚扬. 基于同轴视觉监测的激光深熔焊缝熔深监测[J]. , 2006, 42(8): 229-233.