Spray and Combustion Investigation of Post Injections under Low-Temperature Combustion Conditions with Biodiesel

Fattah, I.M. Rizwanul; Ming, C.; Chan, Qing Nian; Wehrfritz, Armin; Pham, Phuong X.; Yang, Wei; Kook, Sanghoon; Medwell, Paul R.; Hawkes, Evatt R.; Masri, Assaad R.

doi:10.1021/acs.energyfuels.8b00284

Cited by 33 publications

(17 citation statements)

References 52 publications

(116 reference statements)

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“…One of the obvious advantages to use hydrogen over CNG is that carbon-based emissions will be reduced significantly. Although pilot fuel potentially forms soot, the close-coupled high velocity hydrogen jet could enhance mixing within the chamber, which can subsequently lead to enhanced soot oxidation and suppress soot formation processes, similar to diesel post-injection strategy [92,93]. The larger speed of sound and higher calorific value of hydrogen largely compensate for an order of magnitude lower density relative to CNG, therefore, requiring only ∼20% longer injection duration at 249 bar injection pressure ratio and 353 K fuel temperature [94].…”

Section: Dual-fuel High Pressure Direct Injection Compression-ignitiomentioning

confidence: 99%

A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

et al. 2019

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A paradigm shift towards the utilization of carbon-neutral and low emission fuels is necessary in the internal combustion engine industry to fulfil the carbon emission goals and future legislation requirements in many countries. Hydrogen as an energy carrier and main fuel is a promising option due to its carbon-free content, wide flammability limits and fast flame speeds. For spark-ignited internal combustion engines, utilizing hydrogen direct injection has been proven to achieve high engine power output and efficiency with low emissions. This review provides an overview of the current development and understanding of hydrogen use in internal combustion engines that are usually spark ignited, under various engine operation modes and strategies. This paper then proceeds to outline the gaps in current knowledge, along with better potential strategies and technologies that could be adopted for hydrogen direct injection in the context of compression-ignition engine applications—topics that have not yet been extensively explored to date with hydrogen but have shown advantages with compressed natural gas.

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Section: Dual-fuel High Pressure Direct Injection Compression-ignitiomentioning

confidence: 99%

A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

et al. 2019

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“…According to Howey et al [15], HEV showed the the lowest CO 2 emission, with more than half of the tested HEVs had an emission of 70 g CO 2 /km, while that for most of the tested EVs were 70-110 g CO 2 /km. The most efficient diesel engine vehicles, however, were reported to have the highest emission exceeding 110 g CO 2 /km, despite the recent development of diesel fuel and injection strategy [16][17][18]. It is worth noting that these results were acquired based on the structure of British power grid, where CO 2 emission rate is 542 g CO 2 /kWh.…”

Section: The Co 2 Emission From CV Ev and Hev Of Different Countries/regionsmentioning

confidence: 97%

CO2 Emission of Electric and Gasoline Vehicles under Various Road Conditions for China, Japan, Europe and World Average—Prediction through Year 2040

et al. 2019

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Many countries are making strategic plans to replace conventional vehicles (CVs) with electric vehicles (EVs), with the motivation to curb the growth of atmospheric CO2 concentration. While previous publications have mainly employed social-economic based models to predict CO2 emission trends from vehicles over the years, they do not account for the dynamics of engine and motor efficiency under different driving conditions. Therefore, this study utilized an experimentally validated vehicle dynamic model to simulate the consumption of gasoline and electricity for CVs and EVs, respectively, under eight driving cycles for different countries/regions. The CO2 emissions of CVs and EVs through 2040 were then calculated, based on the assumptions of the improvement of engine efficiency and composition of power supply chain over the years. Results reveal that, assuming that the current projections and assumptions remain valid, China would have the highest CO2 emission for EVs, followed by Japan, world average and the EU, mainly determined by the share of fossil fuels in the power grid. As for the influence of road conditions, the CO2 emission of CVs was found to be always higher than that of EVs for all countries/regions over the years. The difference is around 10–20% under highway conditions, and as high as 50–60% in crowded urban driving conditions.

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“…Chemically, biodiesel contains a mixture of methyl esters with long-chain fatty acids, and is typically derived from nontoxic biological resources, such as vegetable oils [35][36][37][38][39], animal fats [40][41][42][43][44][45][46], or even cooking oils [47][48][49][50]. While many recent works analyzed the effects of biodiesel on the injection process, spray formation, and combustion [51][52][53][54][55][56], this section will emphasize the potential of different biofuel blends in reducing the noise and chemical pollutions of ICEs. By analyzing the inlet and exhaust valve displacements for one full revolution of the cam, they showed that large spring force variations were responsible for the fluctuation of the resistive camshaft torque.…”

Section: Biodiesel Fuelsmentioning

confidence: 99%

Performance Enhancement of Internal Combustion Engines through Vibration Control: State of the Art and Challenges

et al. 2019

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Internal combustion engines (ICEs) are the primary source of power generation in today’s driving vehicles. They convert the chemical energy of the fuel into the mechanical energy which is used to drive the vehicle. In this process of energy conversion, several parameters cause the engine to vibrate, which significantly deteriorate the efficiency and service life of the engine. The present study aims to gather all the recent works conducted to reduce and isolate engine vibration, before transmitting to other vehicle parts such as drive shafts and chassis. For this purpose, a background history of the ICEs, as well as the parameters associated with their vibration, will be introduced. The body of the paper is divided into three main parts: First, a brief summary of the vibration theory in fault detection of ICEs is provided. Then, vibration reduction using various mechanisms and engine modifications is reviewed. Next, the effect of using different biofuels and fuel additives, such as alcohols and hydrogen, is discussed. Finally, the paper ends with a conclusion, summarizing the most recent methods and approaches that studied the vibration and noise in the ICEs.

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Spray and Combustion Investigation of Post Injections under Low-Temperature Combustion Conditions with Biodiesel

Cited by 33 publications

References 52 publications

A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

CO2 Emission of Electric and Gasoline Vehicles under Various Road Conditions for China, Japan, Europe and World Average—Prediction through Year 2040

Performance Enhancement of Internal Combustion Engines through Vibration Control: State of the Art and Challenges

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