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Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends

Valencia, Guillermo; Acevedo Peñaloza, Carlos Humberto; Duarte Forero, Jorge (Applied SciencesSuiza, 2020-01-30)

This study investigated the influence of different biodiesel blends produced from residual sunflower oil and palm oil from agroindustry liquid waste on the characteristics of the combustion process, performance, and emissions ...
Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine

Pardo García, Carlos Eduardo; Orjuela Abril, Martha Sofia; Pabón León, Jhon (LubricantsSuiza, 2022-04-05)

: Hydrogen is considered one of the main gaseous fuels due to its ability to improve thermal performance in diesel engines. However, its influence on the characteristics of lubricating oil is generally ignored. Thus, in ...
study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Orjuela Abril, Sofía; FONSECA VIGOYA, MARLEN DEL SOCORRO; Pardo García, Carlos Eduardo (LubricantesSuiza, 2022-04-07)

In the present investigation, a study is carried out using numerical simulation on the effects of cylinder deactivation on tribological parameters and emissions in an internal combustion engine. For the development of ...
Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Orjuela Abril, Martha Sofia; FONSECA VIGOYA, MARLEN DEL SOCORRO; Pardo García, Carlos Eduardo (LubricantsSuiza, 2022-04-07)

In the present investigation, a study is carried out using numerical simulation on the effects of cylinder deactivation on tribological parameters and emissions in an internal combustion engine. For the development of ...

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Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends
...
Valencia, Guillermo | 2020-01-30

This study investigated the influence of different biodiesel blends produced from residual sunflower oil and palm oil from agroindustry liquid waste on the characteristics of the combustion process, performance, and emissions in a single-cylinder diesel engine. For the analysis of the combustion process, a diagnostic model was developed based on the cylinder pressure signal, which allows the calculation of the heat release rate, the accumulated heat rate, and the temperature in the combustion chamber. This is to assess the influence of these parameters on engine emissions. The experiments on the diesel engine were carried out using five types of fuel: conventional diesel, two biodiesel blends of residual palm oil (PB5 and PB10), and two biodiesel blends formed with palm oil and sunflower oil residues (PB5SB5 and PB10SB5). The engine was running in four different modes, which covered its entire operating area. Experimental results show that the in-cylinder pressure curves decrease as the percentage of biodiesel in the fuel increases. Similarly, the results showed a decrease in the heat release rate for biodiesel blends. The diagrams of the accumulated heat release curves were larger for fuels with higher biodiesel content. This effect is reflected in the thermal efficiency of biodiesel blends since the maximum thermal efficiencies were 29.4%, 30%, 30.6%, 31.2%, and 31.8% for PB10SB5, PB5SB5, PB10, PB5, and diesel, respectively. The emission analysis showed that the blends of biodiesel PB5SB5 and PB10SB allowed a greater reduction in the emissions of CO, CO2, HC, and opacity of smoke in all the modes of operation tested, in comparison with the blends of biodiesel PB5 and PB10. However, NOx emissions increased. In general, biodiesel with the percentage of residual sunflower oil does not cause a significant change in the combustion process and engine performance, when compared to biodiesel that includes only residual palm oil.

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Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine
...
Pardo García, Carlos Eduardo | 2022-04-05

: Hydrogen is considered one of the main gaseous fuels due to its ability to improve thermal performance in diesel engines. However, its influence on the characteristics of lubricating oil is generally ignored. Thus, in the present investigation, an analysis of the effect on the physical and chemical properties of lubricating oil with mixtures of diesel fuel–hydrogen was carried out, and the environmental impacts of this type of mixture were assessed. The development of the research was carried out using a diesel engine under four torque conditions (80 Nm, 120 Nm, 160 Nm and 200 Nm) and three hydrogen gas flow conditions (0.75 lpm, 1.00 lpm and 1.25 lpm). From the results, it was possible to demonstrate that the presence of hydrogen caused decreases of 3.50%, 6.79% and 4.42% in the emissions of CO, HC, and smoke opacity, respectively. However, hydrogen further decreased the viscosity of the lubricating oil by 26%. Additionally, hydrogen gas produced increases of 17.7%, 29.27%, 21.95% and 27.41% in metallic components, such as Fe, Cu, Al and Cr, respectively. In general, hydrogen favors the contamination and oxidation of lubricating oil, which implies a greater wear of the engine components. Due to the significantly negative impact of hydrogen on the lubrication system, it should be considered due to its influence on the economic and environmental cost during the engine’s life cycle.

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study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine
...
Orjuela Abril, Sofía | 2022-04-07

In the present investigation, a study is carried out using numerical simulation on the effects of cylinder deactivation on tribological parameters and emissions in an internal combustion engine. For the development of the research, a tribological model was used to predict the characteristics of the lubrication film, friction conditions, blow-by gas, and deformation of the piston rings. Additionally, the construction of a CFD model was carried out to describe the kinematic movement of the engine piston. The analysis of results allowed for the demonstration of the active cylinders presenting an increase of 21.53% and 7.65% in the pressure and temperature in the cylinder wall. Additionally, the active cylinders present a reduction of 11.33% in the minimum thickness of the lubrication film and an increase in the friction force due to asperities, which implies an increase of 33% in power losses due to friction. The implementation of technologies such as cylinder deactivation causes an increase in combustion gas leaks caused by the increase in pressure of the active cylinders. However, the use of this technology allows reducing 9.09%, 8.26%, and 7.41% in CO, HC, and NO emissions. Although the use of technologies such as cylinder deactivation allows significant fuel savings, it is necessary to consider the negative effects caused by this technology, such as the increase in combustion gas leaks and the increase in power loss by the greatest frictional forces.

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Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine
...
Orjuela Abril, Martha Sofia | 2022-04-07

In the present investigation, a study is carried out using numerical simulation on the effects of cylinder deactivation on tribological parameters and emissions in an internal combustion engine. For the development of the research, a tribological model was used to predict the characteristics of the lubrication film, friction conditions, blow-by gas, and deformation of the piston rings. Additionally, the construction of a CFD model was carried out to describe the kinematic movement of the engine piston. The analysis of results allowed for the demonstration of the active cylinders presenting an increase of 21.53% and 7.65% in the pressure and temperature in the cylinder wall. Additionally, the active cylinders present a reduction of 11.33% in the minimum thickness of the lubrication film and an increase in the friction force due to asperities, which implies an increase of 33% in power losses due to friction. The implementation of technologies such as cylinder deactivation causes an increase in combustion gas leaks caused by the increase in pressure of the active cylinders. However, the use of this technology allows reducing 9.09%, 8.26%, and 7.41% in CO, HC, and NO emissions. Although the use of technologies such as cylinder deactivation allows significant fuel savings, it is necessary to consider the negative effects caused by this technology, such as the increase in combustion gas leaks and the increase in power loss by the greatest frictional forces.

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Listar por tema "emissions"

Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends

Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine

study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

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Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends

Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine

study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

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Listar por tema "emissions"

Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends ﻿

Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine ﻿

study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine ﻿

Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine ﻿

Envíos recientes

Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends

Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine

study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Portales Institucionales

Combustion and performance study of low-displacement compression ignition engines operating with Diesel–Biodiesel blends

Investigation of Emission Characteristics and Lubrication Oil Properties in a Dual Diesel–Hydrogen Internal Combustion Engine

study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine

Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine