Effect of Fuel Composition on Exhaust Gas Emissions from DI and DI Impingement Diffusion Combustion Diesel Engines

1994 ◽  
Author(s):  
Mitsuo Tamanouchi ◽  
Yukio Akasaka
Keyword(s):  
Diesel Engines ◽  
Diffusion Combustion ◽  
Fuel Composition ◽  
Exhaust Gas ◽  
Gas Emissions ◽  
Exhaust Gas Emissions

Reduction Techniques of Exhaust Gas Emissions to Meet US EPA Tier4 Standard for Non-Road In-Direct Injection Diesel Engines

2014 ◽  
Author(s):  
Takashi Onishi ◽  
Tomoya Akitomo ◽  
Yuichi Tamaki ◽  
Yoshikazu Takemoto ◽  
Hideyuki Goto ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Exhaust Gas ◽  
Gas Emissions ◽  
Reduction Techniques ◽  
Us Epa ◽  
Exhaust Gas Emissions

scholarly journals Analysis and Multi-Parametric Optimisation of the Performance and Exhaust Gas Emissions of a Heavy-Duty Diesel Engine Operating on Miller Cycle

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3724
Author(s):  
Charalampos Georgiou ◽  
Ulugbek Azimov
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Miller Cycle ◽  
Heavy Duty ◽  
Gas Emissions ◽  
Performance And Emission ◽  
Heavy Duty Diesel ◽  
Exhaust Gas Emissions

A major issue nowadays that concerns the pollution of the environment is the emissions emerging from heavy-duty internal combustion engines. Such concern is dictated by the fact that the electrification of heavy-duty transport still remains quite challenging due to limitations associated with mileage, charging speed and payload. Further improvements in the performance and emission characteristics of conventional heavy-duty diesel engines are required. One of a few feasible approaches to simultaneously improve the performance and emission characteristics of a diesel engine is to convert it to operate on Miller cycle. Therefore, this study was divided into two stages, the first stage was the simulation of a heavy-duty turbocharged diesel engine (4-stroke, 6-cylinder and 390 kW) to generate data that will represent the reference model. The second stage was the application of Miller cycle to the conventional diesel engine by changing the degrees of intake valve closure and compressor pressure ratio. Both stages have been implemented through the specialist software which was able to simulate and represent a diesel engine based on performance and emissions data. An objective of this extensive investigation was to develop several models in order to compare their emissions and performances and design a Miller cycle engine with an ultimate goal to optimize diesel engine for improved performance and reduced emissions. This study demonstrates that Miller cycle diesel engines could overtake conventional diesel engines for the reduced exhaust gas emissions at the same or even better level of performance. This study shows that, due to the dependence of engine performance on complex multi-parametric operation, only one model achieved the objectives of the study, more specifically, engine power and torque were increased by 5.5%, whilst nitrogen oxides and particulate matter were decreased by 30.2% and 5.5%, respectively, with negligible change in specific fuel consumption and CO2, as average values over the whole range of engine operating regimes.

THE CHANCES FOR REDUCTION OF VIBRATIONS IN MECHANICAL SYSTEM WITH LOW-EMISSION SHIPS COMBUSTION ENGINES

2021 ◽  
Vol 157 (A4) ◽  
Author(s):  
R Grega ◽  
J Homišin ◽  
M Puškár ◽  
J Kul’ka ◽  
J Petróci ◽  
...  
Keyword(s):  
Mechanical System ◽  
Diesel Engines ◽  
Fuel Mixture ◽  
Adverse Impact ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Low Emission ◽  
Power Outputs ◽  
Exhaust Gas Emissions ◽  
Engine Power

Development of diesel engines is focused on reduction of exhaust gas emissions, increase of efficiency of the fuel mixture combustion and decrease of fuel consumption. Such engines are referred to as low-emission engines. Low- engines trends bring higher engine power outputs, torques and also increase of vibrations and noisiness level. In order to reduce these vibrations of diesel engines, it is necessary to apply different dynamical elements, which are able to increase an adverse impact of exciting amplitudes. One of the results is application of a pneumatic dual-mass flywheel. The pneumatic dual-mass flywheel is a dynamical element that consists of two masses (the primary and the secondary mass), which are jointed together by means of a flexible interconnection. This kind of the flywheel solution enables to change resonance areas of the mechanical system which consequently leads to reduction of vibrations.

Experimental Characterization of a Swirl Stabilized MGT Combustor

2015 ◽  
Author(s):  
T. O. Monz ◽  
M. Stöhr ◽  
W. O’Loughlin ◽  
J. Zanger ◽  
M. Hohloch ◽  
...  
Keyword(s):  
Flow Field ◽  
Flow Pattern ◽  
Flame Stabilization ◽  
Main Stage ◽  
Exhaust Gas ◽  
Test Rig ◽  
Gas Emissions ◽  
Preheating Temperature ◽  
Exhaust Gas Emissions

A swirl stabilized MGT combustor (Turbec T100) was operated with natural gas and was experimentally characterized in two test rigs, a pressurized and optically accessible MGT test rig and an atmospheric combustor test rig. For the detailed characterization of the combustion processes, planar OH-PLIF and simultaneous 3D-stereo PIV measurements were performed in the atmospheric combustor test rig. Flow fields, reaction zones and exhaust gas emissions are reported for a range of pressure scaled MGT load points. Parameter studies on combustor inlet conditions (e.g. air preheating temperature, air and fuel mass flow rates and fuel split) were conducted in the atmospheric combustor test rig. From the parameters studies the fuel split between the pilot and the main stage and the air preheating temperature were found to have the biggest impact on the flame shape, flame stabilization and exhaust gas emissions. The measurements of the ATM test rig are compared with measurements of the pressurized MGT test rig with and without an optically accessible combustion chamber. Opened and closed conical flame and flow pattern were found in both test rigs. Reasons for the two flame and flow pattern are supposed to be the interaction of pilot stage combustion and flow field and the interaction of the dilution air with the combustion and the flow field. The results are discussed and compared with repect to a transferability of combustion characteristics from the ATM test rig to the MGT test rigs.

Sign in / Sign up

Export Citation Format

Share Document