A Compound Technology for HCCI Combustion in a DI Diesel Engine Based on the Multi-Pulse Injection and the BUMP Combustion Chamber

Su, Weifeng; Lin, Tao; Pei, Yiqiang

doi:10.4271/2003-01-0741

Cited by 81 publications

(28 citation statements)

References 2 publications

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“…Figure 1 shows the schematic of the tested engine, the details of which can be referred in Ref. [10]. Tabel 1 gives the key parameters of the tested engine.…”

Section: Experimental Setup and Modulated Multi-pulse Injection Modesmentioning

confidence: 99%

Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustion and their effects on engine thermal efficiency and emissions

Liu

Wang

et al. 2007

Front. Energy Power Eng. China

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Cycle fuel energy distribution and combustion characteristics of early in-cylinder diesel homogenous charge compression ignition (HCCI) combustion organized by modulated multi-pulse injection modes are studied by the engine test. It is found that heat loss due to unburned fuel droplets and CO emission can be decreased effectively by injection mode regulation, and thermal efficiency can be potentially increased by 4%-12%. From the analyses of combustion process, it is also found that diesel HCCI combustion is a process with a finite reaction rate and is very sensitive to injection timing and injection mode. At injection timing of −90°CA ATDC, extra low NO x emissions can be obtained along with high thermal efficiency.

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“…Figure 1 shows the schematic of the tested engine, the details of which can be referred in Ref. [10]. Tabel 1 gives the key parameters of the tested engine.…”

Section: Experimental Setup and Modulated Multi-pulse Injection Modesmentioning

confidence: 99%

Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustion and their effects on engine thermal efficiency and emissions

Liu

Wang

et al. 2007

Front. Energy Power Eng. China

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“…Анализ и обработка многочисленных опубликованных экспери-ментальных данных [16][17][18][19][20][21][22] позволяет получить простую зависи-мость для задержки начала низкотемпературного сгорания  iLTC как функции задержки высокотемпературного сгорания  iHTC и степени рециркуляции ОГ. На рис.…”

Section: рис 4 результаты расчета периода задержки самовоспламенениunclassified

“…На рис. 5 приведена зависимость разности между периодами задержки "горячего"  iHTC =  iHTC 6n и "холодного"  iLTC = =  iLTC 6n сгораний, выраженных в углах поворота коленчатого вала в функции от периода задержки "горячего" сгорания для разных двига-телей, которые работают на различных нагрузках и частотах враще-ния с разными температурами воздуха на впуске и разной степенью рециркуляции ОГ [16][17][18][19][20][21][22]. …”

Section: рис 4 результаты расчета периода задержки самовоспламенениunclassified

Calculation of Self-Ignition Delay Period and Low-Temperature Oxidation Rate in Diesel Engines at Large Injection Advance and Flue Gas Recirculation

Кулешов¹

2012

EJSI

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Необходимость математического моделирования и компьютер-ной оптимизации рабочих процессов дизелей становится все более актуальной в связи с ужесточением нормативов на выброс вредных веществ с отработавшими газами (ОГ), требованиями высокой удельной мощности и экономичности. Совершенствование эффек-тивных и экологических показателей двигателей обусловливают внесение изменений в их конструкции, внедрение новых систем, усложнение процессов топливоподачи, наддува, газообмена, регу-лирования. Расчет и многомерную оптимизацию процессов в дизеле осуществляют с помощью различных программных средств матема-тического моделирования. Внутрицилиндровые процессы обычно рассматривают в 0-мерной постановке, т. е. параметры газа рассчи-тывают из системы уравнений баланса массы, сохранения энергии и уравнения состояния. Для расчета скорости тепловыделения исполь-зуют разные модели, в частности в данной работе использована так называемая РК-модель, предложенная в 1990-х годах профессором Н.Ф. Разлейцевым [1] и развиваемая в настоящее время А.С. Ку-лешовым [2-4]. Расчет тепловыделения в камере сгорания дизеля основан на предположении о том, что во время впрыска и развития струй скорость сгорания лимитируется в основном скоростью ис-парения. Зная распределение топлива по характерным зонам топ-

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“…In the studies of Su et al [2][3][4][5][6][7], it was found that premixed diesel combustion by early multi-pulse injection could not avoid fuel and temperature stratification, but was characterized by much lower overall local fuel/air equivalence ratio compared with conventional diesel combustion. It was also found that the ignition, the heat release and the emissions were influenced by different stratification.…”

Section: Introductionmentioning

confidence: 96%

Effect of distributions of fuel concentration and temperature on ignition processes in diesel PCCI combustion

2009

Front. Energy Power Eng. China

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The distributions of fuel concentration and temperature have significant effect on the ignition processes of diesel premixed charge compression ignition (PCCI) combustion. It was found in this study that the ignition process of PCCI combustion organized by multipulse injection was strongly influenced by conditions of fuel stratification. The start of low temperature reactions occurred in the leaner area of the combustion chamber in the test engine because the temperature here first reached the point of low temperature reactions. Ignition always occurred in the position where the mixture featured with equivalence ratios close to the mean equivalence ratio of the overall mixture, while the neighboring area of the initial ignition area accumulate heat with a finite speed until finally autoigniting. Moreover, the appearance of highest combustion temperature occurred in the same area at the combustion chamber. For more homogeneous mixture, a higher amount of mixture reached ignition simultaneously, resulting in a larger initial ignition area and a higher temperature at the ignition area. Furthermore, Vtype distribution of equivalence ratio was found to be beneficial to retarding high temperature reaction.

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A Compound Technology for HCCI Combustion in a DI Diesel Engine Based on the Multi-Pulse Injection and the BUMP Combustion Chamber

Cited by 81 publications

References 2 publications

Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustion and their effects on engine thermal efficiency and emissions

Characteristics and energy distribution of modulated multi-pulse injection modes based diesel HCCI combustion and their effects on engine thermal efficiency and emissions

Calculation of Self-Ignition Delay Period and Low-Temperature Oxidation Rate in Diesel Engines at Large Injection Advance and Flue Gas Recirculation

Effect of distributions of fuel concentration and temperature on ignition processes in diesel PCCI combustion

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