Investigation of a New Injection Strategy for Simultaneous Soot and NOx Reduction in a Diesel Engine with Direct Injection

2008 ◽  
Vol 1 (1) ◽  
pp. 1433-1442 ◽  
Author(s):  
S. Merkel ◽  
P. Eckert ◽  
U. Wagner ◽  
A. Velji ◽  
U. Spicher
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Nox Reduction ◽  
Injection Strategy

scholarly journals Experimental study of multiple pilot injection strategy in an automotive direct injection diesel engine

2018 ◽  
Vol 234 ◽  
pp. 03007
Author(s):  
Plamen Punov ◽  
Tsvetomir Gechev ◽  
Svetoslav Mihalkov ◽  
Pierre Podevin ◽  
Dalibor Barta
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Direct Injection ◽  
Combustion Process ◽  
Injection Timing ◽  
Pilot Injection ◽  
Injection Strategy ◽  
Direct Injection Diesel Engine ◽  
Rate Of Heat Release

The pilot injection strategy is a widely used approach for reducing the noise of the combustion process in direct injection diesel engines. In the last generation of automotive diesel engines up to several pilot injections could occur to better control the rate of heat release (ROHR) in the cylinder as well as the pollutant formation. However, determination of the timing and duration for each pilot injection needs to be precisely optimised. In this paper an experimental study of the pilot injection strategy was conducted on a direct injection diesel engine. Single and double pilot injection strategy was studied. The engine rated power is 100 kW at 4000 rpm while the rated torque is 320 Nm at 2000 rpm. An engine operating point determined by the rotation speed of 1400 rpm and torque of 100 Nm was chosen. The pilot and pre-injection timing was widely varied in order to study the influence on the combustion process as well as on the fuel consumption.

A Numerical Study of NOx Reduction for a DI Diesel Engine With Complex Geometry

2004 ◽  
Vol 126 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Renshan Liu ◽  
Chao Zhang
Keyword(s):  
Diesel Engine ◽  
Thermal Efficiency ◽  
Fuel Injection ◽  
Complex Geometry ◽  
Numerical Study ◽  
Direct Injection ◽  
Nox Reduction ◽  
Geometrical Parameters ◽  
Injection Timing ◽  
Di Diesel Engine

A numerical study of NOx reduction for a Direct Injection (DI) Diesel engine with complex geometry, which includes intake/exhaust ports and moving valves, was carried out using the commercial computational fluid dynamics software KIVA-3v. The numerical simulations were conducted to investigate the effects of engine operating and geometrical parameters, including fuel injection timing, fuel injection duration, and piston bowl depth, on the NOx formation and the thermal efficiency of the DI Diesel engine. The tradeoff relationships between the reduction in NOx and the decrease in thermal efficiency were established.

scholarly journals Combined effects of combustion chamber geometry and injection strategy on combustion and emissions of a diesel engine

2021 ◽  
Vol 268 ◽  
pp. 01026
Author(s):  
Jizhou Zhang ◽  
Fuwu Yan ◽  
Yu Wang
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Fuel Injection ◽  
Direct Injection ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Complete Combustion ◽  
Injection Strategy ◽  
Injection Duration ◽  
Chamber Volume

For a certain type of direct injection diesel engine, a three-dimensional model of a single-cylinder complete combustion chamber and in-take/exhaust port was established. Three-dimensional Computational Fluid Dynamics (CFD) analysis software CONVERGE was used for simulation. The effects of fuel injection strategy and combustion chamber geometry on combustion emissions of diesel engine were studied while the combustion chamber volume, engine compression ratio, total fuel injection quantity and total injection duration were kept unchanged. The results show that the strategy of multiple injection and reasonable shape of combustion chamber can effectively increase the turbulent kinetic energy in cylinder, improve the uniformity of oil-gas mixing, reduce the emission of pollutants, and increase the quality of after injection can further reduce the emissions of NOx and soot.

EMISSION CHARACTERISTICS AND EGR APPLICATION OF BLENDED FUELS WITH BDF AND OXYGENATE (DMM) IN A DIESEL ENGINE

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2850-2855 ◽  
Author(s):  
SEUNG-HUN CHOI ◽  
YOUNG-TAIG OH
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Nox Reduction ◽  
Specific Energy Consumption ◽  
Nox Emission ◽  
Biodiesel Fuel ◽  
Oxygenated Fuel ◽  
Blended Fuel ◽  
Blended Fuels

In this study, the possibility of biodiesel fuel and oxygenated fuel (dimethoxy methane ; DMM) was investigated as an alternative fuel for a naturally aspirated direct injection diesel engine. The smoke emission of blending fuel (biodiesel fuel 90vol-% + DMM 10vol-%) was reduced approximately 70% at 2500rpm, full load in comparison with the diesel fuel. But, engine power and brake specific energy consumption showed no significant differences. But, NOx emission of biodiesel fuel and DMM blended fuel increased compared with commercial diesel fuel due to the oxygen component in the fuel. It was needed a NOx reduction counter plan that EGR method was used as a countermeasure for NOx reduction. It was found that simultaneous reduction of smoke and NOx emission was achieved with BDF (95 vol-%) and DMM (5 vol-%) blended fuel and cooled EGR method (15%).

Air–fuel mixing and combustion in a small-bore direct injection optically accessible diesel engine using a retarded single injection strategy

Fuel ◽  
2009 ◽  
Vol 88 (11) ◽  
pp. 2074-2082 ◽  
Author(s):  
Tiegang Fang ◽  
Robert E. Coverdill ◽  
Chia-fon F. Lee ◽  
Robert A. White
Keyword(s):  
Diesel Engine ◽  
Single Injection ◽  
Direct Injection ◽  
Injection Strategy ◽  
Fuel Mixing

SPRAY CHARACTERISTICS IN A DIRECT-INJECTION DIESEL ENGINE

1996 ◽  
Vol 6 (1) ◽  
pp. 95-109 ◽  
Author(s):  
H. C. Yang ◽  
Hong Sun Ryou ◽  
Y. T. Jeong ◽  
Young Ki Choi
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Spray Characteristics ◽  
Direct Injection Diesel Engine
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