Improvements of Exhaust Gas Emissions and Cold Startability of Heavy Duty Diesel Engines by New Injection-Rate-Control Pump

1986 ◽  
Author(s):  
A. Ishida ◽  
T. Kanamoto ◽  
S. Kurihara
Keyword(s):  
Diesel Engines ◽  
Rate Control ◽  
Injection Rate ◽  
Exhaust Gas ◽  
Heavy Duty ◽  
Gas Emissions ◽  
Heavy Duty Diesel ◽  
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 modification of the fuel injection rate in heavy-duty diesel engines

2004 ◽  
Vol 24 (17-18) ◽  
pp. 2715-2726 ◽  
Author(s):  
J.M. Desantes ◽  
J. Benajes ◽  
S. Molina ◽  
C.A. González
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Injection Rate ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Fuel Injection Rate

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

Experimental investigation to study the effects of using hot and partially cold EGR in direct injection diesel engine

TECHNOLOGY ◽  
2016 ◽  
Vol 04 (03) ◽  
pp. 170-173 ◽  
Author(s):  
Radhey Sham ◽  
Rajesh Kumar Saluja ◽  
Gurwinder Singh ◽  
Vineet Kumar ◽  
Shubham Parmar
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
High Performance ◽  
Direct Injection ◽  
Engine Performance ◽  
Exhaust Gas ◽  
Performance Parameters ◽  
Heavy Duty ◽  
Heavy Duty Diesel ◽  
Gas Recirculation

Major exhaust emissions from diesel engines are CO, CO2, PM, UHC and NOx, of which NOx is one of the most harmful. A number of techniques have been utilized to control NOx emissions and exhaust gas recirculation (EGR) is one of the widely used techniques that show outstanding results in NOx reduction in both light and heavy duty diesel engines. In the present study, the experiment has been conducted on a four-stroke, single-cylinder water cooled diesel engine. Here, a long-route EGR system was used in both hot (insulated) and partially cooled (without insulation) conditions. EGR rate was varied from 0 to 24% in steps of 6% and the engine ran at various load conditions. The research objective was to investigate the effects of varying EGR ratios and temperatures on engine performance parameters and determine the effective EGR rate where the engine gives high performance, low fuel consumption and produces low emissions.

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