Identification of Potential Efficiency Opportunities in Internal Combustion Engines Using a Detailed Thermodynamic Analysis of Engine Simulation Results

2008 ◽  
Author(s):  
K. Dean Edwards ◽  
Robert M. Wagner ◽  
Ronald L. Graves
Keyword(s):  
Thermodynamic Analysis ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Engine Simulation ◽  
Simulation Results ◽  
Potential Efficiency

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

2019 ◽  
Vol 178 (3) ◽  
pp. 27-37 ◽  
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.

scholarly journals Important Contributions to Reducing Nitrogen Oxide Emissions from Internal Combustion Engines

2021 ◽  
Vol 18 (17) ◽  
pp. 9075
Author(s):  
Daniela Laura Buruiana ◽  
Adrian Sachelarie ◽  
Claudiu Butnaru ◽  
Viorica Ghisman
Keyword(s):  
Fuel Consumption ◽  
Internal Combustion Engines ◽  
Control Strategies ◽  
New Technology ◽  
Flame Temperature ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Hcci Engine ◽  
Engine Simulation ◽  
Gas Recirculation

Nitrogen oxides are considered significant pollutants because of their effects on ecosystems and human health. The amount of NOx emitted by internal combustion engines can be reduced, mostly by acting on the conditions in which combustion takes place, respectively by lowering the peak flame temperature, reducing the excess of oxygen, etc. The homogeneous charge compression ignition (HCCI) engine represents a new technology that can simultaneously reduce NOx emissions and fuel consumption. This article presents these benefits of the HCCI engine by comparing the emissions and fuel consumption of a monocylinder engine when it is operated in a conventional way, with spark ignition, with those obtained when the engine is running in the HCCI mode. Moreover, since engine simulation has become an important tool for investigating the HCCI process and for developing new control strategies for it, this was used in this study to determine the effects of the exhaust gas recirculation on the combustion quality, respectively, on emissions.

Simulation and Experimental Study of a Diesel Engine Based on an Electro-Hydraulic FVVA System

2018 ◽  
Author(s):  
Yong Lu ◽  
Jian Li ◽  
Lijun Xiong ◽  
Bo Li
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Efficiency ◽  
Combustion Engines ◽  
Optimization Strategy ◽  
Nsga Ii ◽  
Engine Simulation ◽  
Simulation Results ◽  
Combined Simulation ◽  
Reduce Emissions ◽  
Variable Valve

Variable valve timing technologies for internal combustion engines are used to improve power, torque, reduce emissions and increase fuel efficiency. Firstly, the paper presents a new electrohydraulic FVVA system which can control the seating velocity of engine valve flexibly. Secondly, based on the NSGA-II genetic algorithm, outlines multi-objective optimization strategy, the paper designs the parameters of FVVA system to make the system easier to implement. Thirdly, the paper builds the combined FVVA engine simulation model. The combined simulation and experimental are executed to validate the designed FVVA engine. Simulation results show brake power is improved between 1.31% and 4.48% and torque is improved by 1.32% to 4.47%. Brake thermal efficiency and volumetric efficiency also show improvement. Experimental results have good agreement with simulation results. The research results can provide a basis for engine modification design.

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