scholarly journals Analysis of thermal parameters of heat storages for use in vehicles with combustion engines

2019 ◽  
Vol 179 (4) ◽  
pp. 119-125
Author(s):  
Przemysław MĘŻYK ◽  
Grzegorz PRZYBYŁA ◽  
Karolina PETELA
Keyword(s):  
Internal Combustion Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Winter Conditions ◽  
Military Vehicle ◽  
Combat Vehicle ◽  
The Impact

The propulsion system of a vehicle using an internal combustion engine generates a significant amount of waste heat during operation, which is almost entirely discharged into the environment without any useful effect. One of the ways of using waste heat is storing it, and then using, for example, when starting the engine in winter conditions. The application of the indicated solution, in particular for the combat vehicle will allow to reduce the effects of cold start and will shorten the time of preparing such a vehicle for combat operations. The article presents: types of heat accumulators that could be used in a military vehicle, the results of preliminary tests carried out on the test stand and the impact of an additional heat source on the time of heating the internal combustion engine and on emission of exhaust gas components.

scholarly journals Aging of engine oils and their influence on the wear of an internal combustion engine

2021 ◽  
Author(s):  
Marek Idzior
Keyword(s):  
Service Life ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Engine Oils ◽  
Base Oils ◽  
The Impact

New designs of internal combustion engines require the use of engine oils that can cope with more demanding conditions, primarily with greater loads and higher temperatures. The requirements of recent years have led to a wider use of modern base oils and specially designed additive packages. This avoids the formation of impurities and changes in viscosity as a result of shearing of the viscosity additives under high loads. The article discusses the important problem of oil aging during operation and the impact of this phenomenon on the operation of internal combustion engines. The influence of oil service life and its replacement on the emission of toxic exhaust gas components was discussed, and the results of research on the effect of oil service life on changes in their viscosity were presented.

scholarly journals The impact of ignition system damage on the emission of toxic substances in a spark-ignition internal combustion engine

2019 ◽  
Vol 179 (4) ◽  
pp. 86-92
Author(s):  
Mieczysław DZIUBIŃSKI ◽  
Ewa SIEMIONEK ◽  
Artur DROZD ◽  
Michał ŚCIRKA ◽  
Adam KISZCZAK ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Spark Ignition ◽  
Operating Conditions ◽  
Spark Ignition Engine ◽  
Exhaust Gas ◽  
Toxic Substances ◽  
Ignition System ◽  
The Impact

The article discusses the impact of ignition system damage on the emission of toxic subcategories in a spark-ignition internal combustion engine. The aim of the work was to develop an analytical model of ignition system diagnostics, test performance and comparative analysis of the results of simulations and experiments. The model developed allows to analyse the basic parameters of the ignition system affecting the content of toxic substances in the exhaust. Experimental tests were carried out using the MAHA MGT5 exhaust gas analyser for four different combustion engines fueled with petrol at various operating conditions. During the tests, the content of toxic substances in the exhaust gas of a properly working engine and the engine working with damage to the ignition system were registered. The tests will be used to assess the impact of the damage of the spark-ignition engine on the emission of individual components of toxic fumes.

Simulation Research on the Application of Thermoelectric Waste Heat Recovery of Internal Combustion Engine

2010 ◽  
Author(s):  
Maohai Wang ◽  
Thomas Josef Daun ◽  
Yangjun Zhang ◽  
Weilin Zhuge
Keyword(s):  
Internal Combustion Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Parameter Study ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Simulation Research ◽  
Exhaust Gas Temperature ◽  
Engine Power

In this paper, the development of a thermoelectric generator (TEG) simulation model and its implementation into an internal combustion engine (ICE) system model are demonstrated. The TEG model is calibrated with respect to an experimental basis presented in a previously published paper. A TEG parameter study, an analysis of the overall system and the interaction between the TEG and the ICE are carried out. The simulation results indicate that the exhaust gas temperature has a much more significant influence on the TEG performance than the exhaust gas mass flow rate. Without considering the influence of additional backpressure, the application of a TEG shows potential to increase the effective engine power; thereby improving the overall efficiency by approximately 0.6 to 1.7% (depending on engine speed and load). However, when taking additional backpressure into account, this gain in effective engine power is reduced slightly, resulting in a change of the efficiency range to between 0.2 and 1.7%. This illustrates the importance of taking the backpressure into account when designing a real world TEG.

Design of a Method for Test Diagnostics of an Internal Combustion Engine Based on the Analysis of the Exhaust Gas Composition

2020 ◽  
Vol 67 (1) ◽  
pp. 104-110
Author(s):  
Aleksandr V. Gritsenko ◽  
Grigoriy N. Salimonenko ◽  
Maksim V. Nazarov
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Research Purpose ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Ignition System ◽  
Exhaust Gases ◽  
Diagnostic Parameters

The introduction of methods for timely diagnostics of internal combustion engines allows maintaining the environmental indicators of the car fleet at the highest level. (Research purpose) The research purpose is in increasing the reliability of diagnostics of internal combustion engines by using data obtained by selective sampling of exhaust gases. (Materials and methods) Informational, mathematical and experimental research methods, including methods for statistical processing of results and analysis of data obtained during experiments were used during the study. (Results and discussion) The main systems that affect the environmental performance of internal combustion engines has been identified: the fuel supply system, the ignition system and the exhaust gas neutralization system. The article describes a generalized mathematical model for calculating the characteristics of exhaust gases. Authors conducted operational tests on 35 internal combustion engines with justification of their number according to standard methods. The actual value of diagnostic parameters was processed into relative percentages for drawing a nomogram. A zero value has been set for the reference state of the elements specified by the manufacturer. (Conclusions) It was found that the dominant number of failures accounted for internal combustion engines, in detail: the ignition system produces 15-25 percent of failures, the power system produces 30-44 percent, the exhaust system produces 10-15 percent. It was found that for unambiguous identification of any combination of factors, it is necessary to have output values of at least three evaluation criteria. It was found that the most sensitive parameters for evaluating the technical condition of the three systems are: changes in the engine crankshaft speed, the parameters of exhaust gas toxicity, CO, CO2, CH, O2 when providing test modes (operation of the internal combustion engine on 1 cylinder at 20 and 40 percent of the throttle opening). The article describes designed a gasoline engine loader for the implementation of diagnostic modes and control of diagnostic parameters, that allows to create operating loads with an accuracy of 0.1 percent.

scholarly journals Analysis of a Stirling engine in a waste heat recovery system with internal combustion engine

2021 ◽  
Vol 313 ◽  
pp. 13001
Author(s):  
Francesco Catapano ◽  
Carmela Perozziello ◽  
Bianca Maria Vaglieco
Keyword(s):  
Internal Combustion Engine ◽  
Waste Heat ◽  
Combustion Engine ◽  
Heat Content ◽  
Experimental Tests ◽  
Internal Combustion ◽  
Stirling Engine ◽  
Exhaust Gas ◽  
Compression Ignition Engine ◽  
Waste Heat Recovery System

This work aims to study a Stirling engine (SE) used to recover the heat content of the exhaust gas from an internal combustion engine. The attention has been focused on the heat transfer between the exhaust gas and the working gas inside the heater. Experimental tests have been performed on a two-cylinder gamma-type Stirling engine coupled to a compression ignition engine using a thermally insulated pipe and a cap. A mechanical power of 0.275 kW at 900 rpm SE rotational speed was obtained with a SE efficiency of 11.7%. To investigate how the exhaust gas-heater interaction affects SE efficiency, a 3D model was developed by the authors. The cap-heater system was studied as a shell-and-tubes heat exchanger. Experimental values of temperature and velocity have been set as boundary conditions for the cap, while for the heater, pressure and velocity have been predicted using a 1D adiabatic model adjusted for SE geometry. The results showed that temperature distribution is not uniform in both cylinders, involving that the working pistons do not work in the same way. Therefore, to improve SE efficiency, a proper configuration of SE-CI engine coupling should be designed.

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