Decomposition method as a new type of second law analysis of the combustion process of internal combustion engines

A technical solution has been proposed to reduce the consumption of basic hydrocarbon fuel, to improve the technical, economic and environmental performance of internal combustion engines by affecting the combustion process of the fuel-air mixture with a minimum effective mass fraction of hydrogen additive in the fuel-air mixture. The burning rate of hydrogen-air mixtures is an order of magnitude greater than the burning rate of similar mixtures based on gasoline or diesel fuel, compared with the former, they are favorably distinguished by their greater detonation stability. With minimal additions of hydrogen to the fuel-air charge, its combustion time is significantly reduced, since hydrogen, having previously mixed with a portion of the air entering the cylinder and burning itself, effectively ignites the mixture in its entirety. Issues related to the accumulation of hydrogen on board the car, its storage, explosion safety, etc., significantly inhibit the development of mass production of cars using hydrogen fuel. The described technical solution allows the generation of hydrogen on board the car and without accumulation to use it as an additive to the main fuel in internal combustion engines. The technical result is to reduce the consumption of hydrocarbon fuels (of petroleum origin) and increase the environmental friendliness of the car due to the reduction of the emission of harmful substances in exhaust gases.

Download Full-text

Assessment of thermodynamic cycle of internal combustion engine in terms of rightsizing

Combustion Engines ◽

10.19206/ce-2019-331 ◽

2019 ◽

Vol 178 (3) ◽

pp. 182-186

Author(s):

Zbigniew SROKA ◽

Maciej DWORACZYŃSKI

Keyword(s):

Internal Combustion Engine ◽

Internal Combustion Engines ◽

Combustion Engine ◽

Combustion Process ◽

Thermodynamic Cycle ◽

Internal Combustion ◽

Research Problem ◽

Combustion Engines ◽

Operating Characteristics ◽

Swept Volume

The modification of the downsizing trend of internal combustion engines towards rightsizing is a new challenge for constructors. The change in the displacement volume of internal combustion engines accompanying the rightsizing idea may in fact mean a reduction or increase of the defining swept volume change factors and thus may affect the change in the operating characteristics as a result of changes in combustion process parameters - a research problem described in this publication. Incidents of changes in the displacement volume were considered along with the change of the compression space and at the change of the geometric degree of compression. The new form of the mathematical dependence describing the efficiency of the thermodynamic cycle makes it possible to evaluate the opera-tion indicators of the internal combustion engine along with the implementation of the rightsizing idea. The work demonstrated the in-variance of cycle efficiency with different forms of rightsizing.

Download Full-text

Analysis of thermodynamic parameters in spark ignition VCR engine

MATEC Web of Conferences ◽

10.1051/matecconf/201929405001 ◽

2019 ◽

Vol 294 ◽

pp. 05001

Author(s):

Patryk Urbański ◽

Maciej Bajerlein ◽

Jerzy Merkisz ◽

Andrzej Ziółkowski ◽

Dawid Gallas

Keyword(s):

Thermodynamic Parameters ◽

Motion Analysis ◽

Internal Combustion Engines ◽

Initial Conditions ◽

Combustion Process ◽

Internal Combustion ◽

3D Models ◽

Spark Ignition ◽

Combustion Engines ◽

Combustion Processes

3D models of Szymkowiak and conventional engines were created in the Solidworks program. During the motion analysis, the characteristics of the piston path were analyzed for the two considered engine units. The imported file with the generated piston routes was used in the AVL Fire program, which simulated combustion processes in the two engines with identical initial conditions. The configurations for two different compression ratios were taken into account. The basic thermodynamic parameters occurring during the combustion process in internal combustion engines were analyzed.

Download Full-text

Concept design of a novel reformer producing hydrogen for internal combustion engines using fuel decomposition method: Performance evaluation of coated monolith suitable for on-board applications

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.01.227 ◽

2020 ◽

Vol 45 (16) ◽

pp. 9353-9367 ◽

Cited By ~ 3

Author(s):

Heeseon Kim ◽

Soonho Song

Keyword(s):

Performance Evaluation ◽

Decomposition Method ◽

Internal Combustion Engines ◽

Internal Combustion ◽

Combustion Engines ◽

Concept Design ◽

Method Performance

Download Full-text

Thermodynamic modeling of combustion process of the internal combustion engines – an overview

Combustion Engines ◽

10.19206/ce-2019-306 ◽

2019 ◽

Vol 178 (3) ◽

pp. 27-37 ◽

Cited By ~ 1

Author(s):

Denys STEPANENKO ◽

Zbigniew KNEBA

Keyword(s):

Internal Combustion Engines ◽

Combustion Engine ◽

Combustion Process ◽

Engine Performance ◽

Internal Combustion ◽

Air Pollutant ◽

Combustion Engines ◽

Engine Simulation ◽

Toxic Emissions ◽

The Moment

The mathematical description of combustion process in the internal combustion engines is a very difficult task, due to the variety of phenomena that occurring in the engine from the moment when the fuel-air mixture ignites up to the moment when intake and exhaust valves beginning open. Modeling of the combustion process plays an important role in the engine simulation, which allows to predict in-cylinder pressure during the combustion, engine performance and environmental impact with high accuracy. The toxic emissions, which appears as a result of fuels combustion, are one of the main environmental problem and as a result the air pollutant regulations are increasingly stringent, what makes the investigation of the combustion process to be a relevant task.

Download Full-text