Efficiency Improvement of Electric Generating Engine System Based on Internal Combustion Engine: Energy Simulation of New Engine Operation with Electric Generator and Motor

2012 ◽  
Vol 24 (3) ◽  
pp. 487-497 ◽  
Author(s):  
Hiroki Ishikawa ◽  
◽  
Yuta Takeda ◽  
Satoshi Ashizawa ◽  
Takeo Oomichi
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Energy Simulation ◽  
Efficiency Improvement ◽  
Piston Motion ◽  
Engine Operation ◽  
Electric Generator ◽  
Consumption Energy ◽  
Crank Mechanism

An internal combustion engine with a crank mechanism moves with its piston and load mechanism interlocked, and this poses a problem for efficiency improvement. We therefore built a system in which the piston and load mechanism linearly; a generator is used in the combustion stroke and a motor is used in the exhaust, intake, and compression strokes. This system can control piston motion freely, so generation energy and consumption energy in each stroke can be optimized. To check its effectiveness, we developed a simulator in which an engine mechanism and motor/generator is integrated, we performed an energy simulation, and we verified the effectiveness of the method of operation of the proposed system.

Improving the design of an internal combustion engine with counter pistons

2021 ◽  
pp. 3-6
Author(s):  
Keyword(s):  
Internal Combustion Engine ◽  
Dynamic Characteristics ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Torque ◽  
Moment Vector ◽  
Engine Design ◽  
Torque Moment ◽  
Dimensional Parameters ◽  
Crank Mechanism

A new layout of a two-cylinder internal combustion engine with counter-pistons is proposed, which increases its efficiency by reducing the pressure angles. The dynamics of the proposed arrangement of a two-shaft crank-slider internal combustion engine, which provides maximum torque moment at maximum gas pressure in the minimum volume of the combustion chamber, is investigated, which reduces the load on the engine design and its weight and dimensional parameters. The research was carried out by comparing the dynamic characteristics of different engines using vector modular models and the KDAM program. Keywords: internal combustion engine, crank mechanism, indicator diagram, dynamic characteristics, torque moment, vector, contour, model, module [email protected]

Application of precision chronometric technologies for monitoring deviations in the internal combustion engine operation

2021 ◽  
Author(s):  
E.T. Plaksina ◽  
A.B. Syritsky ◽  
A.S. Komshin
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
The Arctic ◽  
Diagnostic Systems ◽  
Time Intervals ◽  
Angle Sensor ◽  
Engine Operation ◽  
Working Cycle

The article considers the main methods of internal combustion engine diagnostics. A method based on measuring the time intervals between the phases of the working cycle of the mechanism is described. An algorithm for measuring the time intervals from the formulation of the problem to the proof of the efficiency of this method on an internal combustion engine has been determined. The installation of the angle sensor on the crankshaft of the experimental bench engine VAZ 21126 is shown. The basis for the construction of a mathematical model of the crankshaft is presented and the main factors influencing its movement are identified. A criterion has been established according to which the misfire is determined most accurately. The results obtained can be used for developing diagnostic systems for internal combustion engines, as well as engines operating in extreme conditions, for example, beyond the Arctic Circle, on ships, etc.

scholarly journals Analytical Approach to the Exergy Destruction and the Simple Expansion Work Potential in the Constant Internal Energy and Volume Combustion Process

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 395
Author(s):  
Jeongwoo Song ◽  
Han Ho Song
Keyword(s):  
Internal Combustion Engine ◽  
Analytical Approach ◽  
Combustion Engine ◽  
Combustion Process ◽  
Internal Combustion ◽  
Thermodynamic System ◽  
Exergy Destruction ◽  
Engine Operation ◽  
System Temperature ◽  
Simple Expansion

The exergy destruction due to the irreversibility of the combustion process has been regarded as one of the key losses of an internal combustion engine. However, there has been little discussion on the direct relationship between the exergy destruction and the work output potential of an engine. In this study, an analytical approach is applied to discuss the relationship between the exergy destruction and efficiency by assuming a simple thermodynamic system simulating an internal combustion engine operation. In this simplified configuration, the exergy destruction during the combustion process is mainly affected by the temperature, which supports well-known facts in the literature. However, regardless of this exergy destruction, the work potential in this simple engine architecture is mainly affected by the pressure during the combustion process. In other words, if these pressure conditions are the same, increasing the system temperature to reduce the exergy destruction does not lead to an increase in the expansion work; rather, it only results in an increase in the remaining exergy after expansion. In a typical internal combustion engine, temperatures before combustion timing must be increased to reduce the exergy destruction, but increasing pressure before combustion timing is a key strategy to increase efficiency.

Performance study of the hypocycloid gear mechanism for internal combustion engine applications

2019 ◽  
pp. 146808741989358 ◽  
Author(s):  
Mostafa A ElBahloul ◽  
ELsayed S Aziz ◽  
Constantin Chassapis
Keyword(s):  
Internal Combustion Engine ◽  
Thermodynamic Model ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Otto Cycle ◽  
Engine Efficiency ◽  
Gear Mechanism ◽  
Crank Mechanism

Fuel conversion efficiency is one of the main concerns in the field of internal combustion engine systems. Although the Otto cycle delivers the maximum efficiency possible in theory, the kinematics of the slider–crank mechanism of the conventional internal combustion engines makes it difficult to reach this level of efficiency in practice. This study proposes using the unique hypocycloid gear mechanism instead of the conventional slider–crank mechanism for the internal combustion engines to increase engine efficiency and minimize frictional power losses. The hypocycloid gear mechanism engine’s kinematics provides the means for the piston-rod assembly to reciprocate in a straight-line motion along the cylinder axis besides achieving a nonlinear rate of piston movement. As a result, this characteristic allows for a true constant-volume combustion, which in turn would lead to higher work output. An in-cylinder gas volume change model of the hypocycloid gear mechanism engine was developed and incorporated into the thermodynamic model for the internal combustion engine cycle. The thermodynamic model of the hypocycloid gear mechanism engine was developed and simulated using MATLAB/Simulink software. A comparison between the conventional engine and the hypocycloid gear mechanism engine in terms of engine performance characteristics showed the enhancements achieved using hypocycloid gear mechanism for internal combustion engine applications. The hypocycloid gear mechanism engine analysis results indicated higher engine efficiency approaching that of the Otto cycle.

Coupled Model of Partially Flooded Lubrication and Oil Vaporization in an Internal Combustion Engine

2005 ◽  
Author(s):  
Boon-Keat Chui ◽  
Harold J. Schock ◽  
Andrew M. Fedewa ◽  
Dan E. Richardson ◽  
Terry Shaw
Keyword(s):  
Internal Combustion Engine ◽  
Piston Ring ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Injection Timing ◽  
Oil Viscosity ◽  
Engine Operation ◽  
Extreme Stress ◽  
Compression Ring

The cylinder-kit assembly of an internal combustion engine experiences severe conditions during engine operation. The top compression ring, in particular, undergoes extreme stress directly from cylinder gas pressure, inertial and thermal loads. The top compression ring is often the most significantly affected piston ring, and one of the common resultant phenomena is high wear on the ring/bore surfaces. In many previous studies, the modeling of tribological phenomena at the top compression ring/bore region involves hydrodynamic and boundary lubrication, friction and wear. This present work accounts for an additional factor that may affect the piston ring/bore lubrication — the lubricant evaporative effect. A three-dimensional oil evaporative analysis is coupled into the calculation of mixed lubrication in a cyclic engine computation. The presence of the evaporation analysis allows the study of the temperature influence on the piston ring/bore lubrication in addition to its effect on oil viscosity. A prospective application of this model is in diesel engine analysis. Considering the broad operating range of modern diesel fuel injection systems, the injection timing can be made throughout the compression/expansion process. It is well demonstrated that certain areas of fuel injection operation can result in potential adverse consequences such as increased bore wear. A well known example is “bore wall fuel wetting.” Given concerns around the potential for wear-inducing interactions between the fuel injection plumes and the bore wall, we have explored a particular interaction: bore wear in response to an imposed local heating of the bore wall. The simulation result provides valuable insights on this interaction, in which higher bore wear is predicted around bore wall area with locally imposed wall heating.

scholarly journals Comparative Parameters Evaluation of Internal Combustion Engines Naturally Aspired and Supercharged With Hybrid Turbocharger

2020 ◽  
Author(s):  
Chiriac Rares ◽  
Anghel Chiru
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Energy Performance ◽  
Operating Efficiency ◽  
Combustion Engines ◽  
Exhaust Gases ◽  
Electric Generator ◽  
Technical Solutions

Abstract Internal combustion engines have an operating efficiency that can be exploited to increase their performance. Some of the waste gases can be recovered through technical solutions such as turbocharging. The turbocharging solution is one of the most popular technical solutions for increasing the energy performance of internal combustion engines. This requires an analysis of the energy balance of the internal combustion engine. This shows that there is a significant reserve of energy in the exhaust gases, which can be used to increase the engine efficiency. One solution is to use this energy to drive a turbine coupled with an electric generator. This article aims to present the result of the experimental research of the hybrid turbocharger, simulating and validating the new solutions for increasing the energy performance of internal combustion engines through hybrid turbochargers using a coupled electric generator. The simulations will be performed using AMESim software developed by Siemens to demonstrate through calculations the efficiency of new solutions, such as a hybrid turbocharger. The tests will be performed using an diesel internal combustion engine with a cylinder capacity of 1.9 liters which is also simulated with AMESim software. The residual exhaust gases of the internal combustion engine will drive the hybrid turbocharger turbine and generate electricity. Electricity can then be used for storage in the car battery or for consumption by the car's electrical system. The article also includes a comparative study between the power and torque of the naturally aspirated internal combustion engine equipped with a hybrid turbocharger.

Research of influence of thermal loadings on reliability of gas-diesel engines of transport and technological machines

2019 ◽  
Vol 2 (3) ◽  
pp. 121-128
Author(s):  
N. S. Sevryugina ◽  
A. S. Apatenko
Keyword(s):  
Internal Combustion Engine ◽  
Diesel Engines ◽  
Thermal Load ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Oil ◽  
Actual Condition ◽  
Engine Operation ◽  
Software Product

Introduction: the factors determining the development trends of the machine-building industry on the example of modernization of the internal combustion engine are considered. The evaluation of the effectiveness of cooperation between manufacturers and the scientific potential of leading scientists in the development of designs of gas-diesel engines. The requirement of time of increase of ecology of internal combustion engines is proved, the reasons braking mass introduction of gas-diesel engines for transport and technological cars are revealed. The parameter of influence on the thermal load of the piston group in gaseous fuel is allocated. The estimation of constructive perfection of development of system of cooling of the piston of the engine is given. The effects of increased temperature on individual parts of the piston in the form of scrapes, chips, causing failure of the internal combustion engine as a whole are shown. The influence of engine oil quality on the engine operation is revealed. It is proposed to Supplement the design of the internal combustion engine with an oil level control device, developed an algorite and a software product for calculating the residual life of the engine oil on key parameters, with the establishment of the term of their replacement.Methods: the study is based on the analysis of the works of leading domestic and foreign scientists in the field of improving the design of power equipment. The theoretical and methodological basis of the study was the system approach, methods of mathematical analysis, reliability theory, analytical and statistical processing of results.Results and discussion: the theoretical justification for the increased thermal load of piston in a gas-diesel engine, justifies the addition of the construction device control engine oil level and consideration of the resource and replacement intervals for the parameters of the actual physical and chemical condition, using the database presented in the software product.Conclusion: operation of gas-diesel engines requires from the operator more strict control over the temperature regime of the engine, the condition of the engine oil and the efficiency of the engine oil, the proposed solutions will allow to assess the quality of the engine oil in real time and to carry out its replacement according to the actual condition, which will ensure.

A Numerical Analysis of the Interaction between the Piston Oil-Film and the Elastic Structure in an Internal Combustion Engine

2013 ◽  
Vol 871 ◽  
pp. 32-38
Author(s):  
Mazouzi Redha ◽  
Kellaci Ahmed ◽  
Karas Abdelkader ◽  
Khelidj Benyoucef
Keyword(s):  
Numerical Analysis ◽  
Computer Program ◽  
Internal Combustion Engine ◽  
Pressure Field ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Mechanical Efficiency ◽  
Piston Motion ◽  
Analytical Treatment ◽  
Secondary Motion

The piston secondary motion significantly influences the tribologicalcharacteristics in an internal combustion engine, such as the piston slapphenomenon and the frictional power loss.An analytical treatment was conducted to investigate piston motion and a computer program was written to predict optimum designs for high mechanical efficiency. This paper focuses on an analysis of the piston dynamic response. By coupling FDM for thehydrodynamic pressure field with the FEM for the piston deformation, wenumerically approximate the lubricantstructure interaction in an internalcombustion engine.

A comparison of methods of modelling the bearing surfaces in an internal combustion engine

2011 ◽  
Vol 226 (4) ◽  
pp. 913-920 ◽  
Author(s):  
P D McFadden ◽  
S R Turnbull
Keyword(s):  
Internal Combustion Engine ◽  
Dynamic Analysis ◽  
Journal Bearing ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Journal Bearings ◽  
Comparison Of Methods ◽  
Piston Motion ◽  
Piston Cylinder

An existing model for the dynamic analysis of the piston motion in an internal combustion engine has been modified to incorporate a simpler representation of the piston–cylinder interaction, and to represent the main and big-end bearings as lubricated rather than dry journal bearings. The results demonstrate that the differences in calculated bearing forces and output torques are negligible, indicating that the simple dry journal bearing model is sufficient, but show that the modelling of the interaction between piston and cylinder is considerably improved.

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