Effects of Nozzle Hole Diameter and Injection Pressure on Flame Lift-Off and Soot Formation in D.I. Diesel Combustion

2011 ◽  
Author(s):  
Wu Zhang ◽  
Jiang-Ping Tian ◽  
Keiya Nishida
Keyword(s):  
Soot Formation ◽  
Injection Pressure ◽  
Hole Diameter ◽  
Diesel Combustion ◽  
Nozzle Hole ◽  
Lift Off

Effects of Nozzle Hole Diameter and Injection Pressure on Fuel Adhesion of Flat-Wall Impinging Spray

2019 ◽  
Author(s):  
Hongliang Luo ◽  
Shintaro Uchitomi ◽  
Tomohiro Watanabe ◽  
Keiya Nishida ◽  
Youichi Ogata ◽  
...  
Keyword(s):  
Injection Pressure ◽  
Hole Diameter ◽  
Flat Wall ◽  
Nozzle Hole

Influence of Injection Nozzle Hole Diameter on Highly Premixed and Low Temperature Diesel Combustion and Full Load Behavior

2010 ◽  
Author(s):  
Steffen Kuhnert ◽  
Uwe Wagner ◽  
Ulrich Spicher ◽  
Simon-Florian Haas ◽  
Klaus Gabel ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hole Diameter ◽  
Diesel Combustion ◽  
Full Load ◽  
Injection Nozzle ◽  
Nozzle Hole ◽  
Load Behavior

Solid particulate mass and number from ducted fuel injection in an optically accessible diesel engine in skip-fired operation

2021 ◽  
pp. 146808742110105
Author(s):  
Brady M Wilmer ◽  
Christopher W Nilsen ◽  
Drummond E Biles ◽  
Charles J Mueller ◽  
William F Northrop
Keyword(s):  
Fuel Injection ◽  
Soot Formation ◽  
Geometric Mean ◽  
Optical Filter ◽  
Injection Pressure ◽  
Bimodal Distribution ◽  
Particulate Filter ◽  
Diesel Combustion ◽  
Measurement Instruments ◽  
Distribution Fitting

Ducted fuel injection (DFI) is a novel combustion strategy that has been shown to significantly attenuate soot formation in diesel engines. While previous studies have used optical diagnostics and optical filter smoke number methods to show that DFI reduces in-cylinder soot formation and engine-out soot emissions, respectively, this is the first study to measure solid particle number (PN) emissions in addition to particle mass (PM). Furthermore, this study quantitatively evaluates the use of transient particle instruments for measuring particles from skip-fired operation in an optical single cylinder research engine (SCRE). Engine-out PN was measured using an engine exhaust particle sizer following a catalytic stripper, and PM was measured using a photoacoustic analyzer. The study improves on earlier preliminary emissions studies by clearly showing that DFI reduces overall PM by 76%–79% and PN for particles larger than 23 nm by 77% relative to conventional diesel combustion at a 1200-rpm, 13.3-bar gross indicated mean effective pressure operating condition. The degree of engine-out PM reduction with DFI was similar across both particulate measurement instruments used in the work. Through the use of bimodal distribution fitting, DFI was also shown to reduce the geometric mean diameter of accumulation mode particles by 26%, similar to the effects of increased injection pressure in conventional diesel combustion systems. This work clearly shows the significant solid particulate matter reductions enabled by DFI while also demonstrating that engine-out PN can be accurately measured from an optical SCRE operating in a skip-fired mode. Based on these results, it is believed that DFI has the potential to enable fuel savings when implemented in multi-cylinder engines, both by lowering the required frequency of active diesel particulate filter regeneration, and by reducing the backpressure imposed by exhaust filtration systems.

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