Article(id=1325529203789287732, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1325529169907704394, articleNumber=null, orderNo=null, doi=10.16236/j.cnki.nrjxb.202502015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1715184000000, receivedDateStr=2024-05-09, revisedDate=1724256000000, revisedDateStr=2024-08-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1793960389324, onlineDateStr=2026-11-06, pubDate=1742832000000, pubDateStr=2025-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793960389324, onlineIssueDateStr=2026-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793960389324, creator=13701087609, updateTime=1793960389324, updator=13701087609, issue=Issue{id=1325529169907704394, tenantId=1146029695717560320, journalId=1205116786560364546, year='2025', volume='43', issue='2', pageStart='97', pageEnd='191', issueExtLink='null', onlineDate='null', pubDate='1742832000000', pubDateStr='2025-03-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793960381247, creator='13701087609', updateTime=1793960495688, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1325529650201649216, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1325529169907704394, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1325529650201649217, tenantId=1146029695717560320, journalId=1205116786560364546, issueId=1325529169907704394, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=127, endPage=135, ext={EN=ArticleExt(id=1325529203961254197, articleId=1325529203789287732, tenantId=1146029695717560320, journalId=1205116786560364546, language=EN, title=Thermodynamic performance and exergy analysis of a two-stage turbocharged Miller-cycle diesel engine, columnId=null, journalTitle=Transactions of CSICE, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The fourth stage of China’s fuel consumption limits for heavy-duty commercial vehicles has set higher requirements for the brake thermal efficiency(BTE). Based on a 7.7L diesel engine, a one-dimensional simulation was firstly conducted with experimental verification, and the mechanism of the influence of Miller-cycle coupling compression ratio on the BTE was explored through exergy analysis. The results indicate that the irreversible combustion loss and exhaust loss decrease with the increase of Miller degree. Under the equal torque conditions, an increase in the compression ratio can reduce the exhaust loss. The use of two-stage turbochargers increases the intake flow rate and total heat capacity in the cylinder, which helps to reduce the heat transfer loss and the exhaust loss. Under high combustion pressure targets, compared to the late intake valve closing strategy, the early intake valve closing scheme increases the heat transfer loss and exhaust loss. Then, an actual engine development plan was completed based on the above calculation results. Engine test was run under the speed of 1200r/min and the torque of 1200N·m. The BTE increases by 4.0% and the brake specific fuel consumption rate(BSFC) decreases by 16g/(kW·h), when the intake valve closing angle is delayed by 40°CA, the compression ratio is increased from 17.2 to 20.5 and the peak combustion pressure is increased from 16.5MPa to 25.0MPa.
, authors=Yi Wang
1, Guanzhang He
2, Tiejian Lin
2, Haozhong Huang
1, Xiaoyu Guo
1, Kongzhao Xing
1, authorsList=Yi Wang, Guanzhang He, Tiejian Lin, Haozhong Huang, Xiaoyu Guo, Kongzhao Xing, authorCompany=null, correspAuthors=Haozhong Huang, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1325529206549139790, articleId=1325529203789287732, tenantId=1146029695717560320, journalId=1205116786560364546, language=CN, title=两级增压米勒循环柴油机的热力学性能及㶲分析, columnId=null, journalTitle=内燃机学报, columnName=, runingTitle=null, highlight=null, articleAbstract=
四阶段《重型商用车辆燃料消耗量限值》对柴油机有效热效率(BTE)提出了更高的要求.基于一台7.7L柴油机进行了一维仿真和试验验证,并通过㶲分析探讨了米勒循环耦合压缩比对有效热效率的影响机制.结果表明:随着米勒度的增加,不可逆燃烧损失和排出损失降低.在等转矩条件下,压缩比的提高可以减小排出损失.两级增压器的使用提高了进气流量,缸内总热容增大,有利于降低传热损失和排出损失.在高爆压目标下,相比晚关策略,进气门早关方案的传热损失和排出损失增加.根据计算结果完成了实际方案开发,在转速为1200r/min、转矩为1200N·m工况下,当进气门关闭角延后40°CA、压缩比由17.2提高至20.5且爆压由16.5MPa提升至25.0MPa时,有效热效率提升了4.0%,燃油消耗率(BSFC)降低了16g/(kW·h).
, authors=王毅
1, 何冠璋
2, 林铁坚
2, 黄豪中
1, 郭晓宇
1, 邢孔钊
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Experimental and simulation results of cylinder pressure and heat release rate, figureFileSmall=AL9M7st/lJBU4rhRjlG66w==, figureFileBig=ieLQu1HLNNsWYs5HJS+J+A==, tableContent=null), ArticleFig(id=1325529209678090624, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图2, caption=
缸内压力和放热率的试验值和仿真值, figureFileSmall=AL9M7st/lJBU4rhRjlG66w==, figureFileBig=ieLQu1HLNNsWYs5HJS+J+A==, tableContent=null), ArticleFig(id=1325529209749393793, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.3, caption=
Valve lift for different schemes, figureFileSmall=31InF5xxLHEAq1M8CtFumg==, figureFileBig=zFDSRoXA9Q7SHwv1lycE1w==, tableContent=null), ArticleFig(id=1325529209824891266, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图3, caption=
不同方案的气门升程, figureFileSmall=31InF5xxLHEAq1M8CtFumg==, figureFileBig=zFDSRoXA9Q7SHwv1lycE1w==, tableContent=null), ArticleFig(id=1325529209925554563, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.4, caption=
Transient changes in intake and exhaust flow rates, figureFileSmall=5boN/zad7kRPObubjvCKTg==, figureFileBig=PojtyPWuvxOOAvLPm0S9zw==, tableContent=null), ArticleFig(id=1325529209996857732, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图4, caption=
进/排气流量的瞬态变化, figureFileSmall=5boN/zad7kRPObubjvCKTg==, figureFileBig=PojtyPWuvxOOAvLPm0S9zw==, tableContent=null), ArticleFig(id=1325529210068160901, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.5, caption=
Variation of SOI with LIVC and GCR in single turbo mode, figureFileSmall=RTwIsgs/9PAGYEB6EhZMFg==, figureFileBig=9ERwzfq+S1GkVrPJcgy+OQ==, tableContent=null), ArticleFig(id=1325529210135269766, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图5, caption=
单级增压模式下SOI随LIVC和压缩比的变化, figureFileSmall=RTwIsgs/9PAGYEB6EhZMFg==, figureFileBig=9ERwzfq+S1GkVrPJcgy+OQ==, tableContent=null), ArticleFig(id=1325529210227544455, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.6, caption=
Variation of BTE with EIVC and GCR, figureFileSmall=+XyLV64zq4bjc2l5F0lsdw==, figureFileBig=NnJjDR0QkBln3xhwLReYZA==, tableContent=null), ArticleFig(id=1325529210294653320, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图6, caption=
BTE随EIVC和压缩比的变化, figureFileSmall=+XyLV64zq4bjc2l5F0lsdw==, figureFileBig=NnJjDR0QkBln3xhwLReYZA==, tableContent=null), ArticleFig(id=1325529210370150793, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.7, caption=
Variation of BTE with LIVC and GCR, figureFileSmall=124xVY2yobhR4k/J1FlcbA==, figureFileBig=RbAC21Z+KH4wxKOmKYLwcA==, tableContent=null), ArticleFig(id=1325529210470814090, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图7, caption=
BTE随LIVC和压缩比的变化, figureFileSmall=124xVY2yobhR4k/J1FlcbA==, figureFileBig=RbAC21Z+KH4wxKOmKYLwcA==, tableContent=null), ArticleFig(id=1325529210537922955, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.8, caption=
Cylinder pressure and HRR of different conditions, figureFileSmall=ozsUfWmSqtMB94cUpwDB7Q==, figureFileBig=omhW/AT4P5OL0jlTeN5PeA==, tableContent=null), ArticleFig(id=1325529210609226124, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图8, caption=
不同工况的缸内压力和放热率, figureFileSmall=ozsUfWmSqtMB94cUpwDB7Q==, figureFileBig=omhW/AT4P5OL0jlTeN5PeA==, tableContent=null), ArticleFig(id=1325529210680529293, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.9, caption=
Combustion characteristic parameters of different conditions, figureFileSmall=13bmtxPFGPxr2Di9DnHFOw==, figureFileBig=SoAvftITu8+ytafQW2357w==, tableContent=null), ArticleFig(id=1325529210764415374, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图9, caption=
不同工况的燃烧特征参数, figureFileSmall=13bmtxPFGPxr2Di9DnHFOw==, figureFileBig=SoAvftITu8+ytafQW2357w==, tableContent=null), ArticleFig(id=1325529210839912847, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.10, caption=
Temperature of different schemes, figureFileSmall=L51hkzuK1INvV9MbTg+cTw==, figureFileBig=aglE+tn6TzTpIhjq/Y/dXw==, tableContent=null), ArticleFig(id=1325529210902827408, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图10, caption=
不同方案的温度, figureFileSmall=L51hkzuK1INvV9MbTg+cTw==, figureFileBig=aglE+tn6TzTpIhjq/Y/dXw==, tableContent=null), ArticleFig(id=1325529210978324881, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.11, caption=
Proportion of exergy for different schemes, figureFileSmall=PK4GaPGjFHlKXDgSobAQuw==, figureFileBig=RWL51SP/8NPV6oETIR/U9w==, tableContent=null), ArticleFig(id=1325529211062210962, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图11, caption=
不同方案的㶲值占比, figureFileSmall=PK4GaPGjFHlKXDgSobAQuw==, figureFileBig=RWL51SP/8NPV6oETIR/U9w==, tableContent=null), ArticleFig(id=1325529211137708435, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Fig.12, caption=
Comparison of calculated and experimental results of the final plan, figureFileSmall=WiNxXSbBh7ALK4N1pjBZVQ==, figureFileBig=sYVDWpDP0bJNwUHOb1uF3w==, tableContent=null), ArticleFig(id=1325529211217400212, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=图12, caption=
最终方案的计算值和试验值对比, figureFileSmall=WiNxXSbBh7ALK4N1pjBZVQ==, figureFileBig=sYVDWpDP0bJNwUHOb1uF3w==, tableContent=null), ArticleFig(id=1325529211288703381, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Tab.1, caption=
Engine specifications
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 缸径/mm | 110 |
| 活塞行程/mm | 135 |
| 排量/L | 7.7 |
| 压缩比 | 17.2 |
| 燃烧室 | ω型 |
| 标定转速/(r·min-1) | 2200 |
| 进气门最大升程/mm | 12.00 |
| 排气门最大升程/mm | 12.94 |
| 进气门开启时刻/(°)CA | 348 |
| 进气门关闭时刻/(°)CA | 559 |
| 排气门开启时刻/(°)CA | 126.5 |
| 排气门关闭时刻/(°)CA | 376.5 |
), ArticleFig(id=1325529211376783766, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=表1, caption=
发动机主要技术参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 缸径/mm | 110 |
| 活塞行程/mm | 135 |
| 排量/L | 7.7 |
| 压缩比 | 17.2 |
| 燃烧室 | ω型 |
| 标定转速/(r·min-1) | 2200 |
| 进气门最大升程/mm | 12.00 |
| 排气门最大升程/mm | 12.94 |
| 进气门开启时刻/(°)CA | 348 |
| 进气门关闭时刻/(°)CA | 559 |
| 排气门开启时刻/(°)CA | 126.5 |
| 排气门关闭时刻/(°)CA | 376.5 |
), ArticleFig(id=1325529211452281239, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Tab.2, caption=
Comparison of calculation and experimental results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 计算值 | 试验值 | 误差/% |
|---|
| 转矩/(N·m) | 1200.0 | 1200.5 | <1 |
| 进气压力/kPa | 241.4 | 241.6 | <1 |
| 进气温度/℃ | 35 | 35 | 0 |
| 排气背压/kPa | 12.9 | 13.0 | <1 |
| 左涡前压力/kPa | 257.9 | 257.3 | <1 |
| 右涡前压力/kPa | 252.4 | 252.3 | <1 |
| 爆发压力/MPa | 16.61 | 16.51 | <1 |
| EGR率/% | 4.81 | 5.00 | <1 |
| BSFC/(g·kW-1·h-1) | 192.6 | 192.5 | <1 |
| BTE/% | 43.53 | 43.55 | <1 |
), ArticleFig(id=1325529211531973016, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=表2, caption=
计算值与试验值对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 计算值 | 试验值 | 误差/% |
|---|
| 转矩/(N·m) | 1200.0 | 1200.5 | <1 |
| 进气压力/kPa | 241.4 | 241.6 | <1 |
| 进气温度/℃ | 35 | 35 | 0 |
| 排气背压/kPa | 12.9 | 13.0 | <1 |
| 左涡前压力/kPa | 257.9 | 257.3 | <1 |
| 右涡前压力/kPa | 252.4 | 252.3 | <1 |
| 爆发压力/MPa | 16.61 | 16.51 | <1 |
| EGR率/% | 4.81 | 5.00 | <1 |
| BSFC/(g·kW-1·h-1) | 192.6 | 192.5 | <1 |
| BTE/% | 43.53 | 43.55 | <1 |
), ArticleFig(id=1325529211607470489, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Tab.3, caption=
Research schemes
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 计算范围 | 步长 | 数量 |
|---|
| 压缩比 | 17~21 | 1 | 5 |
| EIVC/(°)CA | 0~40 | 5 | 9 |
| LIVC/(°)CA | 0~40 | 5 | 9 |
| 爆压/MPa | 17~25 | 40 | 3 |
| 增压系统 | 单级增压系统,两级增压系统 |
), ArticleFig(id=1325529211674579354, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=表3, caption=
研究方案
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 计算范围 | 步长 | 数量 |
|---|
| 压缩比 | 17~21 | 1 | 5 |
| EIVC/(°)CA | 0~40 | 5 | 9 |
| LIVC/(°)CA | 0~40 | 5 | 9 |
| 爆压/MPa | 17~25 | 40 | 3 |
| 增压系统 | 单级增压系统,两级增压系统 |
), ArticleFig(id=1325529211750076827, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=EN, label=Tab.4, caption=
Comparison of calculation and experimental results
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 原始计算值 | 试验值 |
|---|
| BSFC/(g·kW-1·h-1) | 179.7 | 176.6 |
| BTE/% | 46.7 | 47.5 |
| Ebw/% | 43.71 | 44.78 |
| Epw/% | 0.66 | 0.19 |
| Efw/% | 1.63 | 2.10 |
| Eht/% | 12.10 | 10.87 |
| Eib/% | 15.82 | 16.86 |
| Eex/% | 24.18 | 23.30 |
), ArticleFig(id=1325529211833962908, tenantId=1146029695717560320, journalId=1205116786560364546, articleId=1325529203789287732, language=CN, label=表4, caption=
计算值与试验值对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 原始计算值 | 试验值 |
|---|
| BSFC/(g·kW-1·h-1) | 179.7 | 176.6 |
| BTE/% | 46.7 | 47.5 |
| Ebw/% | 43.71 | 44.78 |
| Epw/% | 0.66 | 0.19 |
| Efw/% | 1.63 | 2.10 |
| Eht/% | 12.10 | 10.87 |
| Eib/% | 15.82 | 16.86 |
| Eex/% | 24.18 | 23.30 |
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