語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Recycled Water Injection in a Turboc...
~
Choi, Jeongyong.
FindBook
Google Book
Amazon
博客來
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition./
作者:
Choi, Jeongyong.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:
174 p.
附註:
Source: Dissertations Abstracts International, Volume: 81-02, Section: B.
Contained By:
Dissertations Abstracts International81-02B.
標題:
Automotive engineering. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27536593
ISBN:
9781085669559
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition.
Choi, Jeongyong.
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition.
- Ann Arbor : ProQuest Dissertations & Theses, 2019 - 174 p.
Source: Dissertations Abstracts International, Volume: 81-02, Section: B.
Thesis (Ph.D.)--University of Michigan, 2019.
This item must not be sold to any third party vendors.
In recent years, many engine manufacturers have turned to downsizing and boosting of gasoline engines in order to meet the ever more stringent fuel economy and emissions regulations. With an increase in the number of turbocharged gasoline engines, solutions are required to manage knock under a range of operating conditions. The engine is required to operate with spark retard and/or boost reduction to provide knock reduction leading to reduced fuel economy.The charge air cooler has been introduced to mitigate knock and yield a denser intake charge. However, under certain conditions, water condenses onto the charge air cooler inner surfaces, and this water can be introduced into the combustion chamber. Therefore, water ingestion may cause abnormal combustion. In addition, many researchers have advocated water injection as an approach to replace or supplement existing knock mitigation techniques. To maximize the efficiency of the water injection system for a given amount of water, a deeper understanding of the ability to capture and utilize water is required.The first part of this dissertation pursues an understanding of the condensates generated inside of the charge air cooler is discussed. To understand the ingestion of condensates into the cylinders, the hard acceleration is applied with the condensates and quantitatively correlated the amount of condensation and number of abnormal combustion behavior such as misfire and slowburn in different engine conditions. The next study is designing the condensation separator to prevent the abnormal combustion behavior due to the condensates ingestion. An approach to designing a unit to separate condensation in the flow from the charge air cooler while maintaining a low pressure drop is described.The effect of water on auto-ignition is described using modified CFR engine. Three test fuels gasoline, PRF, and TRF which have similar RON blends are used for this test at various intake pressure and amount of water conditions. The first test is done with constant intake air temperature and φ to exclude the effects of intake air cooling. For the second part of this research, the comparison of the effect of the intake air cooling and the effect of the intake air property change is made.The numerical calculations of the chemical effect of water addition with high octane number fuels and oxygenated fuels such as iso-Octane, toluene, n-Butanol, and Ethanol are presented. Using chemical reaction simulation, CHEMKIN, the simulations have been conducted on the change of hydrocarbon and oxygenated hydrocarbon oxidations process with water addition by examining ignition delay, sensitivity analysis and chemical reaction pathway analysis. At the beginning of the study, change of the ignition delay due to water addition is quantified. Then, the sensitivity analysis and the reaction pathway analysis are carried out to verify more detail of chemical effect of water on combustion process.Through the studies presented in this thesis, some of potential contributions to high efficiency gasoline engine have been obtained. By collecting the condensate, the abnormal combustion behavior such as misfire or slowburn can be prevented, and also collected water condensate can be utilized as a source of water injection system. Because detail effect of water has been shown in the studies, it is expected that the gasoline engine could achieve higher compression ratio by avoiding knock with water injection system.
ISBN: 9781085669559Subjects--Topical Terms:
2181195
Automotive engineering.
Subjects--Index Terms:
Charge air cooler condensate
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition.
LDR
:04733nmm a2200361 4500
001
2267827
005
20200821052212.5
008
220629s2019 ||||||||||||||||| ||eng d
020
$a
9781085669559
035
$a
(MiAaPQ)AAI27536593
035
$a
(MiAaPQ)umichrackham002323
035
$a
AAI27536593
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Choi, Jeongyong.
$3
3545081
245
1 0
$a
Recycled Water Injection in a Turbocharged Gasoline Engine and Detailed Effects of Water on Auto-Ignition.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2019
300
$a
174 p.
500
$a
Source: Dissertations Abstracts International, Volume: 81-02, Section: B.
500
$a
Advisor: Boehman, Andre L.;Hoard, John W.
502
$a
Thesis (Ph.D.)--University of Michigan, 2019.
506
$a
This item must not be sold to any third party vendors.
506
$a
This item must not be added to any third party search indexes.
520
$a
In recent years, many engine manufacturers have turned to downsizing and boosting of gasoline engines in order to meet the ever more stringent fuel economy and emissions regulations. With an increase in the number of turbocharged gasoline engines, solutions are required to manage knock under a range of operating conditions. The engine is required to operate with spark retard and/or boost reduction to provide knock reduction leading to reduced fuel economy.The charge air cooler has been introduced to mitigate knock and yield a denser intake charge. However, under certain conditions, water condenses onto the charge air cooler inner surfaces, and this water can be introduced into the combustion chamber. Therefore, water ingestion may cause abnormal combustion. In addition, many researchers have advocated water injection as an approach to replace or supplement existing knock mitigation techniques. To maximize the efficiency of the water injection system for a given amount of water, a deeper understanding of the ability to capture and utilize water is required.The first part of this dissertation pursues an understanding of the condensates generated inside of the charge air cooler is discussed. To understand the ingestion of condensates into the cylinders, the hard acceleration is applied with the condensates and quantitatively correlated the amount of condensation and number of abnormal combustion behavior such as misfire and slowburn in different engine conditions. The next study is designing the condensation separator to prevent the abnormal combustion behavior due to the condensates ingestion. An approach to designing a unit to separate condensation in the flow from the charge air cooler while maintaining a low pressure drop is described.The effect of water on auto-ignition is described using modified CFR engine. Three test fuels gasoline, PRF, and TRF which have similar RON blends are used for this test at various intake pressure and amount of water conditions. The first test is done with constant intake air temperature and φ to exclude the effects of intake air cooling. For the second part of this research, the comparison of the effect of the intake air cooling and the effect of the intake air property change is made.The numerical calculations of the chemical effect of water addition with high octane number fuels and oxygenated fuels such as iso-Octane, toluene, n-Butanol, and Ethanol are presented. Using chemical reaction simulation, CHEMKIN, the simulations have been conducted on the change of hydrocarbon and oxygenated hydrocarbon oxidations process with water addition by examining ignition delay, sensitivity analysis and chemical reaction pathway analysis. At the beginning of the study, change of the ignition delay due to water addition is quantified. Then, the sensitivity analysis and the reaction pathway analysis are carried out to verify more detail of chemical effect of water on combustion process.Through the studies presented in this thesis, some of potential contributions to high efficiency gasoline engine have been obtained. By collecting the condensate, the abnormal combustion behavior such as misfire or slowburn can be prevented, and also collected water condensate can be utilized as a source of water injection system. Because detail effect of water has been shown in the studies, it is expected that the gasoline engine could achieve higher compression ratio by avoiding knock with water injection system.
590
$a
School code: 0127.
650
4
$a
Automotive engineering.
$3
2181195
650
4
$a
Mechanical engineering.
$3
649730
653
$a
Charge air cooler condensate
653
$a
Water injection
653
$a
Spark retard
690
$a
0540
690
$a
0548
710
2
$a
University of Michigan.
$b
Mechanical Engineering.
$3
2104815
773
0
$t
Dissertations Abstracts International
$g
81-02B.
790
$a
0127
791
$a
Ph.D.
792
$a
2019
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27536593
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9420061
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入