scholarly journals Thermodynamic Fundamentals for Fuel Production Management

2019 ◽  
Vol 11 (16) ◽  
pp. 4449 ◽  
Author(s):  
Karol Tucki ◽  
Remigiusz Mruk ◽  
Olga Orynycz ◽  
Andrzej Wasiak ◽  
Antoni Świć
Keyword(s):  
Diesel Engines ◽  
Carbon Dioxide Emissions ◽  
Fossil Fuels ◽  
Production Management ◽  
Combustion Process ◽  
Experimental Studies ◽  
Road Transport ◽  
Injection System ◽  
Common Rail Injection System ◽  
Common Rail Injection

An increase of needs for replacement of fossil fuels, and for mitigation of Carbon Dioxide emissions generated from fossil fuels inspires the search for new fuels based on renewable biological resources. It would be convenient if the biological component of the fuel required as little as possible conversion operations in the production. The obvious response is an attempt to use unconverted, neat plant oils as a fuel for Diesel engines. The present paper is devoted to the experimental studies of the combustion process of neat rapeseed oil, and its mixtures with gasoline and ethanol as additional components of the mixtures. The investigation of combustion was carried out in a fixed volume combustion chamber equipped with a Common Rail injection system. It is shown that the instant of ignition, as well as time-dependence of heat emanation, are strongly dependent upon mixture composition. The results enable the design of mixture compositions that could serve as commercial fuel for Diesel engines. Such fuels are expected to fulfill the requirements for the sustainability of road transport.

A New Predictive ID Model for Advanced High Speed Direct Injection Diesel Engines

2004 ◽  
Author(s):  
Lurun Zhong ◽  
Naeim A. Henein ◽  
Walter Bryzik
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Direct Injection ◽  
Combustion Process ◽  
Operating Conditions ◽  
Injection System ◽  
Injection Timing ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
Starting Conditions

Advance high speed direct injection diesel engines apply high injection pressures, exhaust gas recirculation (EGR), injection timing and swirl ratios to control the combustion process in order to meet the strict emission standards. All these parameters affect, in different ways, the ignition delay (ID) which has an impact on premixed, mixing controlled and diffusion controlled combustion fractions and the resulting engine-out emissions. In this study, the authors derive a new correlation to predict the ID under the different operating conditions in advanced diesel engines. The model results are validated by experimental data in a single-cylinder, direct injection diesel engine equipped with a common rail injection system at different speeds, loads, EGR ratios and swirl ratios. Also, the model is used to predict the performance of two other diesel engines under cold starting conditions.

Enhanced Splash Models for High Pressure Diesel Sprays

2006 ◽  
Author(s):  
L. Allocca ◽  
L. Andreassi ◽  
S. Ubertini
Keyword(s):  
Diesel Engines ◽  
Second Harmonic ◽  
Laser Sheet ◽  
Combustion Process ◽  
Numerical Data ◽  
Ccd Camera ◽  
Operating Conditions ◽  
Injection System ◽  
Correct Operation ◽  
Common Rail Injection System

Mixture preparation is a crucial aspect for the correct operation of modern DI Diesel engines as it greatly influences and alters the combustion process and therefore, the exhaust emissions. The complete comprehension of the spray impingement phenomenon is a quite complete task and to completely exploit the phenomenon a mixed numerical-experimental approach has to be considered. On the modeling side, several studies can be found in the scientific literature but only in the last years complete multidimensional modeling has been developed and applied to engine simulations. Among the models available in literature, in this paper, the models by Bai and Gosman [1] and by Lee et al. [2, 3] have been selected and implemented in the KIVA-3V code. On the experimental side, the behavior of a Diesel impinging spray emerging from a common rail injection system (injection pressures of 80 MPa and 120 MPa) has been analysed. The impinging spray has been lightened by a pulsed laser sheet generated from the second harmonic of a Nd-YAG laser. The images have been acquired by a CCD camera at different times from the start of injection (SOI). Digital image processing software has enabled to extract the characteristic parameters of the impinging spray with respect to different operating conditions. The comparison of numerical and experimental data shows that both models should be modified in order to allow a proper simulation of the splash phenomena in modern Diesel engines. Then the numerical data in terms of radial growth, height and shape of the splash cloud, as predicted by modified versions of the models are compared to the experimental ones. Differences among the models are highlighted and discussed.

Ion Current, Combustion and Emission Characteristics in an Automotive Common Rail Diesel Engine

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Naeim A. Henein ◽  
Tamer Badawy ◽  
Nilesh Rai ◽  
Walter Bryzik
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Direct Injection ◽  
Common Rail ◽  
Ion Current ◽  
Injection System ◽  
Feedback Signal ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
No Emissions

Advanced electronically controlled diesel engines require a feedback signal to the ECU to adjust different operating parameters and meet demands for power, better fuel economy and low emissions. Different types of in-cylinder combustion sensors are being considered to produce this signal. This paper presents results of an experimental investigation on the characteristics of the ion current in an automotive diesel engine equipped with a common rail injection system. The engine is a 1.9 L, 4-cylinder, direct injection diesel engine. Experiments covered different engine loads and injection pressures. The relationships between the ion current, combustion parameters and engine out NO emissions and opacity are presented. The analysis of the experimental data identified possible sources of the ion current produced in diesel engines.

scholarly journals Analysis of the uniqueness of the combustion process of the Perkins 1104D-E44TA engine in dual-fuel operation powered by natural gas and diesel fuel

2019 ◽  
Vol 177 (2) ◽  
pp. 156-164
Author(s):  
Dariusz KURCZYŃSKI ◽  
Michał WARIANEK ◽  
Piotr ŁAGOWSKI
Keyword(s):  
Diesel Fuel ◽  
Combustion Process ◽  
Injection System ◽  
Dual Fuel ◽  
Maximum Pressure ◽  
Operating Cycle ◽  
Indicator Diagram ◽  
Common Rail Injection System ◽  
Common Rail Injection ◽  
The Impact

The paper presents the results of the research on the uniqueness of the combustion process in the Perkins 1104D-E44TA engine already equipped with a Common Rail injection system, and then adapted on an engine test stand to dual-fuel operation. The result of the combustion process is an indicator diagram. The combustion process in the cylinder of the tested engine was evaluated by determining the uniqueness indicators of subsequent operating cycles, such as: the uniqueness indicator for the maximum pressure of the operating cycle, the uniqueness indicator for the mean indicated pressure, the uniqueness indicator for the indicated diagram and the uniqueness indicator for the partial indicator diagram. The conducted tests and the analysis of the results showed the impact of dual-fuel power supply of the tested engine on the combustion process, as compared to supplying the engine only with diesel fuel, for which it has been optimized.

Object-Relational Model of Experimental Studies of Impact of Climatic Conditions on the Work of a Bi-Fuel Engine

2013 ◽  
Vol 588 ◽  
pp. 202-208
Author(s):  
Witold Marowski ◽  
Krzysztof Rokicki
Keyword(s):  
Diesel Engine ◽  
Relational Database ◽  
Experimental Studies ◽  
Climatic Conditions ◽  
Relational Model ◽  
Injection System ◽  
Climatic Chamber ◽  
Common Rail Injection System ◽  
Object Relational ◽  
Common Rail Injection

The article presents the scope of works which were performed while constructing a testbed for examining a multi-fuel Diesel engine with a Common-Rail injection system. The testbed has been designed in a way which allows to carry out tests in a climatic chamber. The paper also proposes a method of using a relational database to store the information on the completed experiments and the conclusions drawn from them.

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