Temat: heavy duty engines - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Injection system assessment to optimize performance and emissions of a non - road heavy duty diesel engine : experiments and CFD modelling
Autorzy:: Auriemma, M.
Iannuzzi, S.
Powiązania:: https://bibliotekanauki.pl/articles/246478.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel combustion
heavy duty engines
STAR-CD
Opis:: The advancing emissions requirements and the customer demand for increased performance and fuel efficiency are forcing the diesel engine technology to keep improving. In particular, the large diesel engines are undergoing to a significant restriction in emission standards. Reaching the new limits requires innovative solutions, improved calibration and controls of the engine combustion technology, as well as the optimization of the injection system that has experienced the most fundamental development over the last decade. The objective of the paper is to present preliminary results of an investigation for the development of an efficient combustion system for marine diesel engines. The effect of different engine parameters on performance and engine out emissions were evaluated. Specifically, different nozzle geometries, injection pressure, injection timings were taken into account. The investigation was carried out both experimentally and numerically. Three different nozzles geometries for three different values of the start of injection were tested. The in-cylinder pressure, rate of heat release, NOx and soot were evaluated for a high load engine condition. The experimental activity was carried out on a large displacement single cylinder direct injection diesel engine equipped with a high-pressure common rail injection system able to manage multiple injections. The engine test bench was equipped with an external air supercharger able to set high air boost levels. The system controls the intake air temperature by means of a heater exchanger. The numerical investigation was carried out using the commercial CFD STAR-CD code in a three-dimensional domain including the cylinder head and piston bowl. Combustion behaviour was simulated using the 3 Zones Extended Coherent Flame Model (ECFM3Z).
Źródło:: Journal of KONES; 2012, 19, 3; 19-30
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Air Pollution Reduction and Environment Protection Using Methane Fuel for Turbocharged CI Engines
Autorzy:: Ghazal, O. H.
Powiązania:: https://bibliotekanauki.pl/articles/124055.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: air pollution
clean combustion
methane emissions
heavy-duty diesel engines
Opis:: The internal combustion engine is considered as one of the main sources for air pollution due to hydrocarbon fuel combustion. The increased land transport usage requires improvement of the engine efficiency and combustion process technology to reduce the engine emissions. A turbocharged engine and the gaseous fuel replacement are the green tools proposed by researchers to enhance fuel saving and emissions reduction. In this paper, both methods were investigated. The methane is a preferred gaseous fuel due to its lower carbon to hydrogen ratio, resulting in lesser HC and CO emissions. In this paper, a turbocharged compression ignition engine with methane/diesel dual fuel is simulated using professional GT-power code to investigate the effect of methane percentage in mixture on the engine performance and emissions. A turbocharged 6 cylinders compression ignition engine has been built and investigated. During the simulation, the methane/diesel ratios were varied from pure diesel with zero percent methane to 90% methane concentration by mass with 10% increment every run. The results show that the engine brake power and specific fuel consumption increased while the thermal efficiency decreased for lower CH₄ concentration. For higher CH₄ percentage, the brake power and thermal efficiency increased while specific fuel consumption decreased. Moreover, NO emission has 35% reduction compared to neat diesel fuel when 50% of methane was added to the mixture. Conversely, the CO and HC concentration increased when the methane ratio is less than 50% compared to neat diesel combustion. In general, the engine efficiency improved when methane was added to diesel fuel in compression ignition engine with turbocharger boost, resulting in lesser emissions and cleaner environment.
Źródło:: Journal of Ecological Engineering; 2018, 19, 5; 52-58
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Modelling and evaluating piston slap-induced cavitation of cylinder liners in heavy-duty diesel engines
Autorzy:: Liu, Dong
Sun, Nannan
Zhu, Guixiang
Cao, Hengchao
Wang, Tie
Li, Guoxing
Gu, Fengshou
Powiązania:: https://bibliotekanauki.pl/articles/27312785.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: heavy-duty diesel engines
cavitation evaluation
dynamics model
liner acceleration
coolant pressure
Opis:: Cavitation erosion of cylinder liner seriously affects the operational reliability and service life of heavy-duty diesel engines. The accuracy of the modeling-based cavitation risk evaluation is limited by the unclear correspondence between cylinder liner vibration and coolant cavitation. This report is intended to investigate the correspondence between cylinder liner vibration and coolant pressure by combining vibration cavitation test, pressure gradient calculation, and visualization observation. The cavitation risk of the cylinder liner under the piston slap is quantitatively analyzed based on a nonlinear structural dynamics model that incorporates the piston-cylinder liner nonlinear collision, piston thermal deformation, and preload of cylinder head. The results show that the occurrence of cavitation will cause a nonlinear relationship between the cylinder liner acceleration and the coolant pressure. The engine under study has a high risk of cavitation when the cylinder liner acceleration exceeds 1189 m/s2. The difference in cavitation risk for each cylinder is related to the structural modal characteristics of the crankcase. In addition, the effect of piston-liner clearance and piston pin offset on the cavitation risk is investigated based on the dynamics model.
Źródło:: Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 169644
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Environmental Benefits of the SCR Systems: a Case Study of the Lublin City Transport
Autorzy:: Zielińska, K.
Haratym, A.
Powiązania:: https://bibliotekanauki.pl/articles/123515.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: MPK
Municipal Transport Company
SCR system
nitrogen oxides
heavy duty diesel engines
Opis:: Standards linked with the environmental protection and vehicles are increasingly restrictive. EURO VI standard and regulations define the acceptable limits for exhaust emissions of new vehicles sold. Because of that, Selective Catalyst Reduction systems are used in a new vehicles with the heavy-duty type engines. This paper presents a study of the SCR system in public transport vehicles of the Municipal Transport Company (MPK) in Lublin, Poland. The tests were performed to study the power consumption of the SCR (the urea applicator into the catalyst) and calculate the results per unit of fuel. The amount of fuel for the Solaris Trollino 12 trolleybus was estimated and the energy demand found was of the order of 343 kWh/year. This gives low diesel fuel consumption, i.e. only 34.3 litres per year. The study also shows a graph of the daily demand of energy by the SCR system in public transport vehicles.
Źródło:: Journal of Ecological Engineering; 2017, 18, 3; 202-207
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Comparison of structural and operational parameters of selected Euro 6 engines used in long distance commercial vehicles
Porównanie parametrów konstrukcyjno-eksploatacyjnych wybranych silników Euro 6 stosowanych w ciągnikach siodłowych
Autorzy:: Piernikarski, D.
Powiązania:: https://bibliotekanauki.pl/articles/132975.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: commercial vehicles
trucks
heavy duty diesel engines
Euro 6
engine parameters
pojazdy użytkowe
samochody ciężarowe
silniki ZS
parametry silnika
Opis:: The article presents the most important technical solutions used in heavy duty diesel engines powering commercial vehicles – namely tractors – that meet the requirements of the Euro 6 norm. A comparative analysis of selected structural and operational parameters was also made on the example of engines with typical displacement close to 13 dm³ used in long-distance tractors.
W artykule przedstawiono najważniejsze rozwiązania techniczne stosowane w silnikach wysokoprężnych dużej mocy służących do napędu ciągników siodłowych, spełniających wymagania normy Euro 6. Dokonano również analizy porównawczej wybranych parametrów konstrukcyjno-eksploatacyjnych na przykładzie silników o objętości skokowej 13 dm³ stosowanych w ciągnikach transportu dalekobieżnego.
Źródło:: Combustion Engines; 2015, 54, 4; 3-14
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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