Performance Response Characteristic of Turbocharged Diesel Engine Under Fluctuating High Back Pressure Environment

被引：0

作者：

Xiang H. ^{[1
]}

Ma Z. ^{[1
]}

Yang M. ^{[1
]}

Deng K. ^{[1
]}

Huang M. ^{[2
]}

Liu Y. ^{[3
]}

机构：

[1] Key Laboratory for Power Machinery&Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai

[2] Shanghai Marine Diesel Engine Research Institute, Shanghai

[3] Kangyue Technology Company Limited(Shandong), Shouguang

来源：

Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2023年 / 41卷 / 05期

关键词：

fluctuating back pressure; fluctuating period; time-average back pressure; turbocharged diesel engine;

D O I：

10.16236/j.cnki.nrjxb.202305047

中图分类号：

学科分类号：

摘要：

The effects of a fluctuating back pressure on performance response characteristics of a turbocharged diesel engine were studied by experiment，and response mechanism of different fluctuating characteristics was discussed. Results show that under the fluctuating back pressure environment，the engine power，boost pressure，pre-turbine exhaust pressure and temperature all fluctuate significantly with the back pressure，showing a typical hysteresis loop shape. The fluctuating period and time-average back pressure are the key factors which affect the response characteristics. When fluctuating period is shortened，the hysteresis loops of engine power，boost pressure and pre-turbine exhaust pressure gradually expand from narrow shape，and the unsteadiness increases over three times，indicating that the unsteady characteristics gradually strengthen. When the time-average back pressure decreases，the hysteresis loop shows an expanding trend，unsteadiness of low average back pressure is over 2.55 times of the high ones，thus the unsteady characteristics are enhanced. The performance parameter at the intake has an obvious response lag behind the exhaust，the former is over 1.9 times as unsteady as the latter. The hysteresis response characteristics of engine performance under fluctuating back pressure are mainly derived from the inertia of turbocharger. © 2023 Chinese Society for Internal Combustion Engines. All rights reserved.

引用

页码：404 / 411

页数：7

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