scholarly journals Effects of Pilot Injection Timing and EGR on Combustion, Performance and Exhaust Emissions in a Common Rail Diesel Engine Fueled with a Canola Oil Biodiesel-Diesel Blend

Energies ◽  
2015 ◽  
Vol 8 (7) ◽  
pp. 7312-7325 ◽  
Author(s):  
Jun Ge ◽  
Min Kim ◽  
Sam Yoon ◽  
Nag Choi
Keyword(s):  
Diesel Engine ◽  
Canola Oil ◽  
Exhaust Emissions ◽  
Common Rail ◽  
Injection Timing ◽  
Pilot Injection ◽  
Combustion Performance

scholarly journals Effects of pilot injection timing and EGR on a modern V6 common rail direct injection diesel engine

2013 ◽  
Vol 50 ◽  
pp. 012008 ◽  
Author(s):  
Nik Rosli Abdullah ◽  
Rizalman Mamat ◽  
Miroslaw L Wyszynski ◽  
Anthanasios Tsolakis ◽  
Hongming Xu
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Common Rail ◽  
Injection Timing ◽  
Pilot Injection ◽  
Direct Injection Diesel Engine

Effect of Multiple Injection Strategy on Atomization and Emission Reduction Characteristics in a Diesel-Ethanol Fueled Engine

2010 ◽  
Author(s):  
Su Han Park ◽  
In Mo Youn ◽  
Sung Wook Park ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Exhaust Emissions ◽  
Common Rail ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Multiple Injection ◽  
Spray Cone ◽  
Injection Interval ◽  
Injection Modes ◽  
Blended Fuels

The aim of this work is to investigate the effect of the multiple injections on the overall spray and the exhaust emissions characteristics in a common rail four cylinder diesel engine operated using diesel-ethanol blended fuels. In order to prevent the phase separation in blended fuels, biodiesel fuel that based on palm oil added to the blended fuels. The reduction problem of cetane number in blended fuels was supplemented by the addition of biodiesel fuel. The spray characteristics were analyzed through the spray images which obtained by the high speed camera. In addition, the combustion and exhaust emissions characteristics were measured and analyzed by using a four cylinder diesel engine with common rail injection system. It revealed that the increase of the injection interval induces the slow development rate of the second spray in the multiple injection modes. The spray cone angle of the single injection mode is wider than that of the multiple injection modes. The advance of the first injection timing caused the reduction of the second injection quantity, and the relaxation of the combustion pressure rise rate. NOx emission shows a reduction trend by the increased ethanol blending ratio, while it shows an increasing pattern by the advance of the first injection timing at the fixed second injection. In HC and CO emissions, the short injection interval between the first and the second injections is better than long injection interval.

Spray and Combustion Characteristics of Biodiesel Fuel in a Direct Injection Common-Rail Diesel Engine

2007 ◽  
Author(s):  
Hyun Kyu Suh ◽  
Hyun Gu Rho ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Injection Rate ◽  
Combustion Characteristics ◽  
Common Rail ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Pilot Injection ◽  
Conventional Diesel Fuel

The aim of this work is to investigate the effect of mixing ratio and pilot injection on spray and combustion characteristics of biodiesel fuel and compared with those of diesel fuel in a direct injection common-rail diesel engine. In order to study the influence factors of biodiesel fuel on the spray and combustion characteristics, the experiments were conducted at various mixing ratios and injection conditions of the biodiesel and engine operating conditions. The macroscopic and microscopic characteristics such as injection rate, split injection effect, spray tip penetration, droplet diameter, and axial velocity distribution of biodiesel fuel were compared with the results of conventional diesel fuel by using spray visualization system composed of Ar-ion laser, ICCD camera and phase Doppler particle analyzer (PDPA) system. The combustion and exhaust emission characteristics of biodiesel fuel were studies using common-rail diesel engine with four cylinders. For the biodiesel blended fuel, it was revealed that higher injection pressure is needed to achieve the same injection rate at the higher mixing ratio. The spray tip penetration of biodiesel fuel was much the same with those of diesel. The atomization characteristics of biodiesel were inferior to conventional diesel fuel due to high viscosity and surface tension. The peak combustion pressures of both fuels were increased with advanced injection timing and the combustion pressure of biodiesel fuel is higher than that of diesel fuel. As the pilot injection timing is advanced to the TDC, the dissimilarities of both fuels combustion pressure are reduced. It can be also founded that the pilot injection can enhance the deteriorated spray and combustion characteristics of biodiesel fuel caused by physical fuel properties.

scholarly journals Effect of EGR Rate and Injection Timing on the Characteristics of Exhaust Emissions in Light-duty Diesel Engine

2012 ◽  
Vol 20 (3) ◽  
pp. 7-12 ◽  
Author(s):  
Ho-Jeong Gong ◽  
In-Goo Hwang ◽  
A-Hyun Ko ◽  
Cha-Lee Myung ◽  
Sim-Soo Park ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Exhaust Emissions ◽  
Injection Timing ◽  
Light Duty
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