Effects of Post Injection on Piston Lubrication in a Common Rail Small Bore Diesel Engine

2005 ◽  
Author(s):  
Ryou Oinuma ◽  
Shuuji Takuma ◽  
Tooru Koyano ◽  
Masaaki Takiguchi
Keyword(s):  
Diesel Engine ◽  
Common Rail ◽  
Post Injection

Visualization of the Effects of Post Injection and Swirl on the Combustion Process of a Passenger Car Common Rail DI Diesel Engine

2003 ◽  
Author(s):  
Arjan Helmantel ◽  
Joop Somhorst ◽  
Ingemar Denbratt
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Flame Temperature ◽  
Combustion Process ◽  
Small Diameter ◽  
Ccd Camera ◽  
Common Rail ◽  
Post Injection ◽  
Passenger Car ◽  
Di Diesel Engine

The effects of variations in injection strategy and swirl on a DI Diesel engine performance and emissions were tested. The cylinder head was fitted with a small diameter endoscope, coupled with a triggered CCD camera, in order to study the effect of these variations on the combustion process. The images that were taken of the combustion process were used to calculate the spatial and temporal distribution of flame temperature and soot kks factor by using the 2-color method. The engine used in the experiments is a single cylinder version of a modern, passenger car type, common rail Diesel engine with a displacement of 480 cc. The fitted endoscope caused very little interference with the combustion chamber due to its small dimensions. The 65 degree angle view of the endoscope allowed coverage of a large portion of the entire combustion chamber. The combustion images and derived temperatures and soot concentrations were used to study the influence of post injection and high swirl. Adding a third (post) injection to the pilot and main injection increases the mixing and the flame temperature during the second half of the combustion process, thereby improving soot oxidation. The fuel efficiency was not negatively affected by the later phasing of part of the heat release. Increased swirl of the intake air was also studied. An 80% increase in swirl-ratio was achieved by closing off one of the two intake ports with a butterfly valve. The improved mixing gave significant reductions in soot emissions, with a small increase in NOx formation.

Influence of Post Injection on Emission Characteristics of a High-Pressure Common-Rail Diesel Engine Fueled with Biodiesel Blends

2014 ◽  
Vol 852 ◽  
pp. 808-814
Author(s):  
Di Ming Lou ◽  
Chen Chen Zhang ◽  
Zhi Yuan Hu ◽  
Pi Qiang Tan ◽  
Jian Jun Lin
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Common Rail ◽  
Injection Timing ◽  
Particulate Emissions ◽  
Post Injection ◽  
Biodiesel Blends ◽  
Injection Parameters ◽  
Injection Quantity ◽  
High Pressure Common Rail

An experimental study was conducted in a high-pressure common-rail diesel engine fueled with biodiesel-diesel blends (the volume ratio of biodiesel is 20%). Influences of post-injection parameters on gaseous and particulate emissions are studied. The results show that post injection timing has greater influence on particulate emissions of biodiesel engine in comparison with post injection quantity. With the delay of post injection timing, NOX emissions firstly reduce and then increase and again slightly reduce, while particulate emissions initially increase and then decrease and again soar, indicating a trade-off relationship. With the increase of post injection quantity, NOX emissions hardly change except at the low engine load, while particulate emissions increase in general. In order to improve the emission performance comprehensively, the injection parameters have to be recalibrated and split injection strategy has to be reformulated when the diesel engine is fueled with biodiesel blends.

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

Effects of Fischer-Tropsch diesel blending in petrochemical diesel on combustion and emissions of a common-rail diesel engine

Fuel ◽  
2021 ◽  
Vol 305 ◽  
pp. 121587
Author(s):  
Panpan Cai ◽  
Chunhua Zhang ◽  
Zheng Jing ◽  
Yiwen Peng ◽  
Jiale Jing ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Common Rail ◽  
Fischer Tropsch
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