Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine

Park, Cheolwoong; Kim, Sungdae; Kim, Hongsuk; Moriyoshi, Yasuo

doi:10.1016/j.energy.2012.02.060

Cited by 132 publications

(39 citation statements)

References 12 publications

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“…The formation of an overly lean mixture can be another reason for increased THC emissions. The CO emission behavior is very similar to that of THC emissions, and is consistent with the results of previous studies on lean mixture combustion [6,7,16,17,20,22,30]. …”

Section: Effect Of Fuel Injection Ratio On Engine Emissionssupporting

confidence: 80%

“…The stratified lean combustion is known to reduce NO x emissions by approximately 80% compared to the homogenous stoichiometric mixture combustion. This is because the ignitable rich mixture, which produces high temperature and NO x formation, exists only in the recirculation zone in the vicinity of the spark plug electrodes [16,28,29]. The flame propagation is improved by the small lean mixture of the first fuel injection and largely by the diffusion flame of the second fuel injection.…”

Section: Figurementioning

confidence: 89%

“…However, the optimal fuel injection, spark ignition timing, and ratio of injected fuel amount can differ according to the operating point. As the formation of an appropriate stratified mixture is difficult with a single injection at a certain operating condition, multiple injection strategies were employed in the previous studies [7,16,17,22,25]. In the present study, a two-staged injection strategy is applied and optimized.…”

Section: Methodsmentioning

confidence: 99%

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Combustion and Emission Characteristics According to the Fuel Injection Ratio of an Ultra-Lean LPG Direct Injection Engine

et al. 2016

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Abstract:The effect of the fuel injection ratio on the combustion and emission characteristics of stratified lean mixture combustion was investigated for a spray-guided liquefied petroleum gas (LPG) direct injection engine. Inter-injection spark-ignition combustion-a specially designed combustion strategy for LPG fuel derived from a two-staged injection-was employed to maximize the improvement in thermal efficiency when combustion stability is secured. When changing the fuel injection ratio, the optimum spark advance and fuel injection timings were experimentally determined to maximize the thermal efficiency based on sweeping timings. The optimum fuel injection ratio with the highest thermal efficiency (42.76%) and stable operation was 60%/40%, with the optimization of the spark advance and fuel injection timing, because of the locally rich mixture region in the recirculation zone. NO x emissions were at their highest level with a fuel injection ratio of 60%/40% because of the high combustion temperature, and the levels of total hydrocarbon and CO emissions with 50%/50% and 60%/40% fuel injection ratios were similar, whereas emissions at 70%/30% were significantly higher because of fuel wetting and the formation of over-lean mixture.

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Section: Effect Of Fuel Injection Ratio On Engine Emissionssupporting

confidence: 80%

Section: Figurementioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

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Combustion and Emission Characteristics According to the Fuel Injection Ratio of an Ultra-Lean LPG Direct Injection Engine

et al. 2016

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“…Figure 9 shows the effect of ignition timing on coefficient of variation. The development of unfavourable mixture for ignition and flame propogation near the spark plug due to overmixing and undermixing phenomenon reduces the performance of engine in both cases [16]. Figure 10 shows the effect of Spark Timing on maximum cylinder pressure.…”

Section: B] Effect Of Spark Timing On Engine Performance and Emissmentioning

confidence: 99%

Investigations on High Performance and Low Emissions GDI Engine used in Agricultural Applications in India

Chincholkar¹,

Bhiogade²,

Suryawanshi³

2017

IOSR JMCE

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“…Among the three types of typical GDI combustion systems [10], the wall-guided configuration is the least used in recent engine production due to concerns regarding fuel impingement and high THC and particle emissions [11]. However, the wall-guided configuration is still employed and is combined with the air-guided configuration to reduce costs in some systems [12].…”

Section: Development Of Gdi Combustion Systemsmentioning

confidence: 99%

Recent Progress in Automotive Gasoline Direct Injection Engine Technology

Shuai

et al. 2018

Automot. Innov.

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Gasoline direct injection (GDI) engines are currently the dominant powertrains for passenger cars. With the implementation of increasingly stringent fuel consumption and emission regulations worldwide, GDI engines are facing challenges owing to high particulate matter emissions and a tendency to knock, leading to a change in the research and design (R&D) issues compared with those in the twentieth century. This paper reviews the progress in research regarding GDI engine technologies over the past 20 years, focusing on combustion system configurations, and also highlights common issues in GDI R&D, including preignition and deto-knock, soot formation and PM emissions, injector deposits and gasoline compression ignition (GCI). First, an overview of recent developments in the field as driven by regulations is provided, following which progress in injection and combustion systems is examined. Third, the review addresses the occurrence and mechanism of deto-knock and considers means of suppressing this phenomenon. The fourth section discusses soot formation mechanisms and particulate matter emission characteristics of GDI engines and describes the application of gasoline particulate filter (GPF) after-treatment. The subsequent section summarizes studies regarding injector deposit formation, as well as pioneering research into GCI combustion modes. Finally, a summary and future prospects for GDI engine technologies are provided.

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Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine

Cited by 132 publications

References 12 publications

Combustion and Emission Characteristics According to the Fuel Injection Ratio of an Ultra-Lean LPG Direct Injection Engine

Combustion and Emission Characteristics According to the Fuel Injection Ratio of an Ultra-Lean LPG Direct Injection Engine

Investigations on High Performance and Low Emissions GDI Engine used in Agricultural Applications in India

Recent Progress in Automotive Gasoline Direct Injection Engine Technology

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