Sizing Study of Drops Produced by High Diesel Fuel Injection Pressure Sprays

2008 ◽  
pp. 137-137-13
Author(s):  
DM Popa ◽  
KS Varde
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Fuel Injection Pressure ◽  
Diesel Fuel Injection

scholarly journals Influence of Fuel Injection Pressure on the Emissions Characteristics and Engine Performance in a CRDI Diesel Engine Fueled with Palm Biodiesel Blends

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3837 ◽  
Author(s):  
Sam Ki Yoon ◽  
Jun Cong Ge ◽  
Nag Jung Choi
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Biodiesel Fuel ◽  
Nox Emissions ◽  
Oxides Of Nitrogen ◽  
Fuel Blend ◽  
Engine Load ◽  
Fuel Injection Pressure

This experiment investigates the combustion and emissions characteristics of a common rail direct injection (CRDI) diesel engine using various blends of pure diesel fuel and palm biodiesel. Fuel injection pressures of 45 and 65 MPa were investigated under engine loads of 50 and 100 Nm. The fuels studied herein were pure diesel fuel 100 vol.% with 0 vol.% of palm biodiesel (PBD0), pure diesel fuel 80 vol.% blended with 20 vol.% of palm biodiesel (PBD20), and pure diesel fuel 50 vol.% blended with 50 vol.% of palm biodiesel (PBD50). As the fuel injection pressure increased from 45 to 65 MPa under all engine loads, the combustion pressure and heat release rate also increased. The indicated mean effective pressure (IMEP) increased with an increase of the fuel injection pressure. In addition, for 50 Nm of the engine load, an increase to the fuel injection pressure resulted in a reduction of the brake specific fuel consumption (BSFC) by an average of 2.43%. In comparison, for an engine load of 100 Nm, an increase in the fuel injection pressure decreased BSFC by an average of 0.8%. Hydrocarbon (HC) and particulate matter (PM) decreased as fuel pressure increased, independent of the engine load. Increasing fuel injection pressure for 50 Nm engine load using PBD0, PBD20 and PBD50 decreased carbon monoxide (CO) emissions. When the fuel injection pressure was increased from 45 MPa to 65 MPa, oxides of nitrogen (NOx) emissions were increased for both engine loads. For a given fuel injection pressure, NOx emissions increased slightly as the biodiesel content in the fuel blend increased.

Effects of Fuel Injection Pressure on Spray Characteristics and Vaporization Characteristics of Diesel Fuel Spray

2016 ◽  
Vol 2016 (0) ◽  
pp. G0700102
Author(s):  
Shun SHIMOTSUMAGARI ◽  
Takeru IWAMOTO ◽  
Masaoki SUGIHARA ◽  
Hideki HASHIMOTO ◽  
Osamu MORIUE
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Fuel Spray ◽  
Spray Characteristics ◽  
Fuel Injection Pressure

The Effects of Fuel Injection Pressure and Fuel Type on the Combustion Characteristics of a Diesel Engine

2014 ◽  
Author(s):  
Jim Cowart ◽  
Dianne Luning Prak ◽  
Len Hamilton
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Common Rail ◽  
Injection System ◽  
Fuel Type ◽  
Delay Times ◽  
Fuel Injection Pressure ◽  
Physical And Chemical

In an effort to understand the effects of injection system pressure on alternative fuel performance, a single cylinder diesel engine was outfit with a modern common rail fuel injection system and piezoelectric injector. As future new fuels will likely be used in both older mechanical injected engines as well as newer high pressure common rail engines, the question as to the sensitivity of a new fuel type across a range of engines is of concern. In this study conventional diesel fuel (Navy NATO F76) was compared with the new Navy HRD (Hydro-processed Renewable Diesel) fuel from algal sources, as well as the high cetane reference fuel nC16 (n-hexadecane CN=100). It was seen that in general, IGD (Ignition Delay) was shortened for all fuels with increasing fuel injection pressure, and was shortened with higher CN fuels. The combustion duration for all fuels was also significantly reduced with increasing fuel injection pressure, however, longer durations were seen for higher CN fuels at the same fuel pressure due to less pre-mixing before the start of combustion. Companion modeling using the LLNL (Lawrence Livermore National Lab) heavy hydro-carbon and diesel PRF chemical kinetic mechanisms for HRD and nC16 was applied to understand the relative importance of the physical and chemical delay periods of the IGD. It was seen that at low fuel injection pressures, the physical and chemical delay times are of comparable duration. However, as injection pressure increases the importance of the chemical delay times increases significantly (longer), especially with the lower CN fuel.

Impact of Fuel Injection Pressure on Spray and Combustion Characteristics of OME and Diesel Blends

2021 ◽  
Author(s):  
Simon LeBlanc ◽  
Xiao Yu ◽  
Gared Pisciotto ◽  
Xiaoye Han ◽  
Jimi Tjong ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Direct Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Combustion Efficiency ◽  
Particulate Emissions ◽  
Fuel Blend ◽  
Particulate Matter Emissions ◽  
Fuel Injection Pressure

Abstract Emission regulations focus on the simultaneous reduction of NOx and particulate matter emissions, especially for heavy-duty engines. Oxygenated fuels offer significant advantages in reducing particulate emissions while having little effect on NOx emissions. In addition, renewable fuels present a GHG emission advantage to meet the zero-emission requirements of future hydrocarbon fuels. Among the leading contenders, oxymethylene dimethyl ether (OME) fuels have the potential to be used for direct injection applications. OME as a blend with diesel fuel offers a direct means of improving the emissions of current on-road diesel engines without modification. In this paper, an empirical investigation into spray behavior and engine performance of diesel/OME fuel at 10% by mass has been performed under various fuel injection pressures. Neat diesel fuel was tested as a baseline case. The results are compared to tests under matching conditions using a diesel and OME fuel blend with a focus on spray characteristics, combustion behavior, and engine-out emissions. The physical properties of OME improve the volatility of diesel fuel and can tolerate shorter mixing times without promoting PM production. The PM emissions were found to be reduced by up to 50% and the combustion efficiency was improved at matching NOx levels with OME blending.

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