A study on the reduction of exhaust emissions through HCCI combustion by using a narrow spray angle and advanced injection timing in a DME engine

Kim, Hyung Jun; Lee, Kwan-Soo; Lee, Chang Sik

doi:10.1016/j.fuproc.2011.04.024

Cited by 30 publications

(21 citation statements)

References 36 publications

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“…A previous study showed that the fuel injection system of the common rail type can independently control the injection amount by pressure, injection duration, and timing from the revolutions per minute (rpm) and load factor of the engine, thereby improving power and reducing emissions [4]. To control ignition timing, exhaust gas recirculation rate and operating regions in a premixed DME HCCI (Homogeneous Charged Compression Ignition) was realized on the ultra-low NO x and smokeless emission with induced DME as the main fuel [5][6][7][8] and investigated on the effects of the combustion phasing with exhaust gas recirculation loop for external EGR (Exhaust Gas Recirculation) [9]. Furthermore, pilot injection-which is a characteristic of the common rail system-can shorten the ignition delay and increase the heat generation rate, thereby reducing combustion noise and nitrogen oxide emissions [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

Yang

Lee

2018

Energies

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This study investigates a preliminary injection characterization of the injection rate and the injection quantity behavior in a high-pressure common rail injection system used in a heavy-duty engine. The injection rate meter and the injection quantity meter used in the test meter measuring systems were jointly connected under the Zeuch method measurement principles at a constant volume chamber and under the Bosch method measurement principles at a long pipe flow. The trade-off trend for the injection rate and the injection quantity was observed according to the injection pressure. As expected, fuel injection with pilot injection affected the spray quantity and the injection evolution of subsequent fuel injection without pilot injection in dimethyl ether and diesel fuel. The pressure variations in the initial injection duration (2000-6000 µs) of the main and pilot injections for diesel and DME were similar. However, after 7000 µs, the pressure of DME increased more rapidly compared to that of diesel. This finding was the result of the rapid density changes caused by the nature of compressive fluid. Therefore, the DME supply pump was expected to require a higher drive energy by approximately 20% compared to that of the diesel supply pump.

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Section: Introductionmentioning

confidence: 99%

Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

Yang

Lee

2018

Energies

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“…The test results showed an improvement of 5.64% in BTE, a reduction of 4.6% in BSFC and an 11% increase in the NO x level. An HCCI engine was used by Kim [25] with a narrow spray angle and advanced injection of 80° bTDC to 10° bTDC using a dimethyl ether [26] fueled diesel engine. The bowl shape of the piston head was modified to apply the narrow spray angle and advanced injection timing.…”

Section: Introductionmentioning

confidence: 99%

Fuel Injection Timings of a Direct Injection Diesel Engine Running on Neat Lemongrass Oil-Diesel Blends

Sathiyamoorthi¹,

Sankaranarayanan²

2015

Int. J. Automot. Mech. Eng.

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In this study, the effect of neat lemongrass oil [1]-diesel blends on the performance, combustion and emission characteristics of a direct injection diesel engine was investigated with different injection timings of 21° (retarded), 23° (normal) and 27° (advanced) bTDC positions by using four different fuel blends of diesel, LGO25, LGO50 and neat lemongrass oil. The experimental results show that maximum cylinder pressure and heat release rate increased with advanced fuel injection timing for all test fuels. There was a reduction in BSFC and significant improvement in the brake thermal efficiency (BTE) with advanced injection timing. Emissions from the diesel engine such as smoke and hydrocarbon (HC) were reduced but NO X emission was very high with advanced injection timing compared with other injection timings. When the injection timing is advanced, ignition delay increases, which leads to the more prominent initial phase of combustion in the premixed region. In the light of the experimental results, the optimal injection timing determined for LGO-diesel blends was found to be 27° bTDC.

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“…Some notable works on homogeneous charge compression ignition (HCCI) as a potential combustion technology for DME combustion have shown promising results with simultaneous reduction of NOx and PM emissions [33,36]. Other possible methods to achieve complete combustion and less emissions are; controlled fuel injection strategy [21,24,36,41,42,78,80,81], fuel injector configuration, injection pressures, and to employ combustion after treatment processes like EGR, oxidation catalysts and particle filters etc. [22,38].…”

Section: Objectives Of This Reviewmentioning

confidence: 99%

“…HCCI combustion of DME was studied by several researchers like Ogawa et [81], and Ying et al [34] to analyse the performance of DME combustion. They found significant drop in emissions compared to other combustion methods for DME.…”

Section: Experimental Investigations On Gaseous (Nox Hc and Co) And Pmmentioning

confidence: 99%

“…For predicting NOx emissions they used a GRI (Gas Research Institute) NO mechanism [139], which contains four species (N, NO, N2O, NO2) and nine reactions. Another study by Kim et al [24,81] used the same CFD tools and turbulence and combustion models as used by Park et al [42]. They conducted numerical simulation of fuel injection and spray strategies in an HCCI engine to study their effect in emission reduction.…”

Section: Studies Conducted On Gaseous and Soot Emissionsmentioning

confidence: 99%

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A study on the control of NOx and particulate matter emissions from dimethyl ether combustion in compression ignition engines

Thomas¹

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Dimethyl Ether (DME) is a new age fuel developed mainly from coal and natural gas to use in compression ignition (CI) engines relatively easily with minimum modifications. One of the advantages of DME combustion in CI engines is the low emission levels of NOx and particulate matter (PM) in comparison with diesel combustion. Therefore, utilization of DME as an alternative fuel in CI engines can potentially meet stricter emission regulations with less effort.The thesis starts with a review of the body of experimental and numerical research on NOx and PM emissions from DME combustion, with the objective being to identify the most promising methods for emission control in DME fuelled engines. With DME being already available in several countries the current research interest is to optimize the engine performance in a cost-effective way with least modifications to existing technologies while minimizing combustion emissions to meet even the strictest emission regulations.Gaseous emissions from DME combustion are a well-researched topic while PM emissions, especially UFPM were neglected so far. However, PM emissions will become a major concern under the future emission norms such as Euro VI. A major part of the introduction and literature review discusses some of the novel methods of emission control

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A study on the reduction of exhaust emissions through HCCI combustion by using a narrow spray angle and advanced injection timing in a DME engine

Cited by 30 publications

References 36 publications

Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

Experimental Research on the Injection Rate of DME and Diesel Fuel in Common Rail Injection System by Using Bosch and Zeuch Methods

Fuel Injection Timings of a Direct Injection Diesel Engine Running on Neat Lemongrass Oil-Diesel Blends

A study on the control of NOx and particulate matter emissions from dimethyl ether combustion in compression ignition engines

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