06/00294 The modification of the fuel injection rate inheavy-duty diesel engines. Part 1: Effects on engine performance and emissions

2006 ◽  
Vol 47 (1) ◽  
pp. 41
Keyword(s):  
Diesel Engines ◽  
Fuel Injection ◽  
Engine Performance ◽  
Injection Rate ◽  
Performance And Emissions ◽  
Engine Performance And Emissions ◽  
Fuel Injection Rate

scholarly journals Development and Assessment of an Integrated 1D-3D CFD Codes Coupling Methodology for Diesel Engine Combustion Simulation and Optimization

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1612
Author(s):  
Federico Millo ◽  
Andrea Piano ◽  
Benedetta Peiretti Paradisi ◽  
Mario Rocco Marzano ◽  
Andrea Bianco ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Early Stage ◽  
Engine Performance ◽  
Part Load ◽  
Simulation And Optimization ◽  
Coupling Procedure ◽  
Performance And Emissions ◽  
Engine Performance And Emissions ◽  
Engine Development

In this paper, an integrated and automated methodology for the coupling between 1D- and 3D-CFD simulation codes is presented, which has been developed to support the design and calibration of new diesel engines. The aim of the proposed methodology is to couple 1D engine models, which may be available in the early stage engine development phases, with 3D predictive combustion simulations, in order to obtain reliable estimates of engine performance and emissions for newly designed automotive diesel engines. The coupling procedure features simulations performed in 1D-CFD by means of GT-SUITE and in 3D-CFD by means of Converge, executed within a specifically designed calculation methodology. An assessment of the coupling procedure has been performed by comparing its results with experimental data acquired on an automotive diesel engine, considering different working points, including both part load and full load conditions. Different multiple injection schedules have been evaluated for part-load operation, including pre and post injections. The proposed methodology, featuring detailed 3D chemistry modeling, was proven to be capable assessing pollutant formation properly, specifically to estimate NOx concentrations. Soot formation trends were also well-matched for most of the explored working points. The proposed procedure can therefore be considered as a suitable methodology to support the design and calibration of new diesel engines, due to its ability to provide reliable engine performance and emissions estimations from the early stage of a new engine development.

scholarly journals Comparison of the Emissions, Noise, and Fuel Consumption Comparison of Direct and Indirect Piezoelectric and Solenoid Injectors in a Low-Compression-Ratio Diesel Engine

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4023 ◽  
Author(s):  
Stefano d’Ambrosio ◽  
Alessandro Ferrari ◽  
Alessandro Mancarella ◽  
Salvatore Mancò ◽  
Antonio Mittica
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Compression Ratio ◽  
Fuel Injection ◽  
Engine Performance ◽  
Combustion Noise ◽  
Driving System ◽  
Performance And Emissions ◽  
Direct Acting ◽  
Engine Performance And Emissions

An experimental investigation has been carried out to compare the performance and emissions of a low-compression-ratio Euro 5 diesel engine featuring high EGR rates, equipped with different injector technologies, i.e., solenoid, indirect-acting, and direct-acting piezoelectric. The comparisons, performed with reference to a state-of-the-art double fuel injection calibration, i.e., pilot-Main (pM), are presented in terms of engine-out exhaust emissions, combustion noise (CN), and fuel consumption, at low–medium engine speeds and loads. The differences in engine performance and emissions of the solenoidal, indirect-acting, and direct-acting piezoelectric injector setups have been found on the basis of experimental results to mainly depend on the specific features of their hydraulic circuits rather than on the considered injector driving system.

scholarly journals The Effects of Port Water Injection on Spark Ignition Engine Performance and Emissions Fueled by Pure Gasoline, E5 and E10

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1214
Author(s):  
Farhad Salek ◽  
Meisam Babaie ◽  
Maria Dolores Redel-Macias ◽  
Ali Ghodsi ◽  
Seyed Vahid Hosseini ◽  
...  
Keyword(s):  
Water Injection ◽  
Engine Performance ◽  
Spark Ignition ◽  
Injection Rate ◽  
Spark Ignition Engine ◽  
Oxides Of Nitrogen ◽  
Human Beings ◽  
Performance And Emissions ◽  
Engine Performance And Emissions ◽  
Engine Power

It has been proven that vehicle emissions such as oxides of nitrogen (NOx) are negatively affecting the health of human beings as well as the environment. In addition, it was recently highlighted that air pollution may result in people being more vulnerable to the deadly COVID-19 virus. The use of biofuels such as E5 and E10 as alternatives of gasoline fuel have been recommended by different researchers. In this paper, the impacts of port injection of water to a spark ignition engine fueled by gasoline, E5 and E10 on its performance and NOx production have been investigated. The experimental work was undertaken using a KIA Cerato engine and the results were used to validate an AVL BOOST model. To develop the numerical analysis, design of experiment (DOE) method was employed. The results showed that by increasing the ethanol fraction in gasoline/ethanol blend, the brake specific fuel consumption (BSFC) improved between 2.3% and 4.5%. However, the level of NOx increased between 22% to 48%. With port injection of water up to 8%, there was up to 1% increase in engine power whereas NOx and BSFC were reduced by 8% and 1%, respectively. The impacts of simultaneous changing of the start of combustion (SOC) and water injection rate on engine power and NOx production was also investigated. It was found that the NOx concentration is very sensitive to SOC variation.

scholarly journals Effect of cold start on engine performance and emissions from diesel engines using IMO-Compliant distillate fuels

2019 ◽  
Vol 255 ◽  
pp. 113260 ◽  
Author(s):  
Thuy Chu Van ◽  
Ali Zare ◽  
Mohammad Jafari ◽  
Timothy A. Bodisco ◽  
Nicholas Surawski ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Engine Performance ◽  
Cold Start ◽  
Performance And Emissions ◽  
Engine Performance And Emissions

Study of Fuel Temperature Effects on Fuel Injection, Combustion and Emissions of Direct-Injection Diesel Engines

2003 ◽  
Author(s):  
Gong Chen
Keyword(s):  
Diesel Engines ◽  
Temperature Effects ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection Rate ◽  
Fuel Temperature ◽  
Injection Parameters ◽  
Medium Speed ◽  
Performance And Emissions

The influence of inlet liquid fuel temperature on direct-injection diesel engines can be noticeable and significant. The work in this paper investigates the effects of inlet fuel temperature on fuel injection, in-cylinder combustion, and performance and emissions of medium-speed diesel engines. An enhanced understanding and simplified modeling of the variations in main fuel injection parameters affected by inlet fuel temperature are developed. The study indicates that the main affected injection parameters include the injector injection timings, the fuel injection rate, the fuel injection duration, and the injection spray atomization. The primary fuel temperature effects on the injection parameters are from the fuel bulk modulus of elasticity and the density with the fuel viscosity less significant as the injector nozzle flow is in a turbulent region. The developed models can predict the changes in the injection parameters versus fuel temperature. As inlet fuel temperature increases, the nozzle fuel-injection-start timing is predicted to be retarded, the injection rate to be reduced, and the needle-lift duration to be prolonged from the baseline. The variation trends of the engine performance and emissions versus fuel temperature are analyzed by considering its consequent effect on in-cylinder combustion processes. It is predicted that raising fuel temperature would result in an increase in CO, HC, PM and smoke emissions, and in a decrease in NOx. The experimental results of the output performance and emissions from testing a medium-speed four-stroke diesel engine agreed with the trends analytically predicted. The understanding and models developed can apply to compression-ignition direct-injection liquid fuel engines in general.

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