A Model of a Direct Injection Diesel Combustion System for Use in Cycle Simulation and Optimization Studies

1987 ◽  
Author(s):  
W. H. Lipkea ◽  
A. D. DeJoode
Keyword(s):  
Direct Injection ◽  
Diesel Combustion ◽  
Combustion System ◽  
Simulation And Optimization ◽  
Cycle Simulation

scholarly journals Influence of the diesel pilot injector configuration on ethanol combustion and performance of a heavy-duty direct injection engine

2021 ◽  
pp. 146808742110012
Author(s):  
Nicola Giramondi ◽  
Anders Jäger ◽  
Daniel Norling ◽  
Anders Christiansen Erlandsson
Keyword(s):  
Direct Injection ◽  
Engine Performance ◽  
High Load ◽  
Operating Conditions ◽  
Injection System ◽  
Injection Timing ◽  
Diesel Combustion ◽  
Heavy Duty ◽  
Pure Ethanol ◽  
Ethanol Combustion

Thanks to its properties and production pathways, ethanol represents a valuable alternative to fossil fuels, with potential benefits in terms of CO2, NOx, and soot emission reduction. The resistance to autoignition of ethanol necessitates an ignition trigger in compression-ignition engines for heavy-duty applications, which in the current study is a diesel pilot injection. The simultaneous direct injection of pure ethanol as main fuel and diesel as pilot fuel through separate injectors is experimentally investigated in a heavy-duty single cylinder engine at a low and a high load point. The influence of the nozzle hole number and size of the diesel pilot injector on ethanol combustion and engine performance is evaluated based on an injection timing sweep using three diesel injector configurations. The tested configurations have the same geometric total nozzle area for one, two and four diesel sprays. The relative amount of ethanol injected is swept between 78 – 89% and 91 – 98% on an energy basis at low and high load, respectively. The results show that mixing-controlled combustion of ethanol is achieved with all tested diesel injector configurations and that the maximum combustion efficiency and variability levels are in line with conventional diesel combustion. The one-spray diesel injector is the most robust trigger for ethanol ignition, as it allows to limit combustion variability and to achieve higher combustion efficiencies compared to the other diesel injector configurations. However, the two- and four-spray diesel injectors lead to higher indicated efficiency levels. The observed difference in the ethanol ignition dynamics is evaluated and compared to conventional diesel combustion. The study broadens the knowledge on ethanol mixing-controlled combustion in heavy-duty engines at various operating conditions, providing the insight necessary for the optimization of the ethanol-diesel dual-injection system.

Effects of intake swirl on the fuel/air mixing and combustion performance in a lateral swirl combustion system for direct injection diesel engines

Fuel ◽  
2021 ◽  
Vol 286 ◽  
pp. 119376
Author(s):  
Yanlin Chen ◽  
Xiangrong Li ◽  
Shuainan Shi ◽  
Qingxu Zhao ◽  
Dong Liu ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Combustion System ◽  
Combustion Performance ◽  
Swirl Combustion ◽  
Air Mixing ◽  
Intake Swirl

A New Direct Injection Combustion System for Heavy-Duty Methanol Engines

1988 ◽  
Author(s):  
Toshiyuki Seko ◽  
Shinji Kobayashi ◽  
Yong Kil Kim
Keyword(s):  
Direct Injection ◽  
Combustion System ◽  
Heavy Duty

Investigations on Low Pressure Gasoline Direct Injection for a Standard GDI Combustion System

2010 ◽  
Author(s):  
Stephan Schmidt ◽  
Martin Joyce ◽  
Jonathan Wall ◽  
Alexander Trattner ◽  
Roland Kirchberger ◽  
...  
Keyword(s):  
Direct Injection ◽  
Low Pressure ◽  
Gasoline Direct Injection ◽  
Combustion System

scholarly journals Optimization of the combustion system of a medium duty direct injection diesel engine by combining CFD modeling with experimental validation

2016 ◽  
Vol 110 ◽  
pp. 212-229 ◽  
Author(s):  
Jesus Benajes ◽  
Ricardo Novella ◽  
Jose Manuel Pastor ◽  
Alberto Hernández-López ◽  
Manabu Hasegawa ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Experimental Validation ◽  
Direct Injection ◽  
Cfd Modeling ◽  
Combustion System ◽  
Direct Injection Diesel Engine
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