scholarly journals Thermal load of internal combustion engine fuelled by nitrogen monoxide – case study of Fiat Punto 1,2 8V

2005 ◽  
Vol 123 (4) ◽  
pp. 51-59
Author(s):  
Zbigniew SROKA
Keyword(s):  
Wear Rate ◽  
Internal Combustion Engine ◽  
Thermal Load ◽  
Combustion Engine ◽  
Nitrogen Monoxide ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Piston Rings

An improvement of efficiency of modern combustion engines is otherwise known as automotive tuning. It needs thermal and durability analyses. Various forms of automotive tuning have been discussed in this paper but the application of nitrogen monoxide (NOS) has been given special attention. Some analyses of thermal load of piston and wear rate of piston rings have been performed.

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

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.

scholarly journals The Working Principle of a Turbine “Case Study: GE Frame 9E Gas Turbine”

2019 ◽  
pp. 1-20
Author(s):  
Obolo Olupitan Emmanuel
Keyword(s):  
Internal Combustion Engine ◽  
Gas Turbine ◽  
Combustion Engine ◽  
Mechanical Energy ◽  
Internal Combustion ◽  
Reciprocating Motion ◽  
Fuel Gas ◽  
Spark Plug ◽  
Working Principle

Gas Turbine is one of the machines that use the thermodynamic principle converting fuel energy to mechanical energy. It is an internal combustion engine. Also, designed to accelerate a stream of gas, which is used to produce a reactive thrust to propel an object or to produce mechanical power that turns a load. It functions in the same way as the internal combustion engine. It sucks in air from the atmosphere, and compress it. The fuel (gas) is injected and ignited (spark plug). The gases expand doing work and finally exhausts outside. Instead of reciprocating motion, the gas turbine uses a rotary motion throughout, and that is the only difference.

FEATURES OF MEASURING THE CAMSHAFT OF INTERNAL COMBUSTION ENGINES

2021 ◽  
Vol 4 (30) ◽  
pp. 99-105
Author(s):  
A. V. Summanen ◽  
◽  
S. V. Ugolkov ◽  
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technical Condition ◽  
Combustion Engines

This article discusses the issues of assessing the technical condition of the camshaft, internal combustion engine. The necessary parameters for assessing the technical condition of the engine camshaft have been determined. How and how to measure and calculate this or that parameter is presented in detail. Methods for calculating the parameters are presented. A scheme and method for measuring neck wear, determining the height of the cam, determining the beating of the central journal of the camshaft are proposed. The main defects of the camshafts are presented. The issues of the influence of these parameters on the operability of the camshaft and the internal combustion engine as a whole are considered.

Possibility of using gas lubricant in the cylinders of internal combustion engines of transport vehicles

2021 ◽  
pp. 13-20
Author(s):  
Keyword(s):  
Internal Combustion Engine ◽  
Bearing Capacity ◽  
Power Plants ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Engine Piston ◽  
Suspension Stiffness ◽  
Gas Layer

The prospects of using the gas-static suspension of the internal combustion engine piston in transport vehicles and power plants are considered. The diagram of the piston and the method for calculating the stiffness and bearing capacity of the gas layer surrounding the piston are presented, as well as the results of experiments that showed the relevance of this method. The possibility of gas and static centering of the engine piston is confirmed. Keywords: internal combustion engine, piston, gasstatic suspension, stiffness, bearing capacity, gas medium. [email protected]

System Parameters Identifying and Performance Predicting of ICEs Combining Multidisciplinary Model With System Responding Data

2008 ◽  
Author(s):  
Xianghui Meng ◽  
Youbai Xie
Keyword(s):  
Structural Change ◽  
Internal Combustion Engines ◽  
Structural Parameters ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Piston Rings ◽  
System Parameters ◽  
Multidisciplinary Model ◽  
Cylinder Sleeve

For complex equipments, the phenomena of system declining such as wear and fatigue often takes place and spreads after a period of running. So it is important to identify the interior structural change of system during maintenance to avoid the system to be broken abruptly. Traditionally there are two methods to analyze and predict the structural change of system. One is from the monitoring data of equipments. Another is from the mechanism of structural changing and the interior working process of equipments. In this paper a combining method, which combining the advantages of the above two methods, is used to identify the structural change of internal combustion engines. The principle of the method is to firstly build an analytical system model, in which the system parameters stand for the structural parameters or constraints. Then the current value of system parameters in the model can be identified by comparing the calculating responding results and the detected responding data. From the varying of system parameters the structural change of system can be deduced. For internal combustion engines (ICEs), the most important CPSR (combustion Chamber-Piston-cylinder Sleeve-piston Rings) system is taken as the research object. A multidisciplinary model is built to simulate the interior working processes, especially the combustion process, the structural dynamics process, the tribology process and the coupling processes among them. Then the seeking-roots method (SRM) is used to identify the value of system parameters. A case study on a low power gasoline engine verifies the above method. In the case study, the blow by gap, which stands for the wear of piston rings and cylinder sleeve, is identified with the detected combustion pressure. The case study shows that the method of this paper can identify the structural change of complex equipments. It can provide accurate information for equipments maintenance as well as the residual life prediction.

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.

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