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Wyszukujesz frazę "Slezak, A." wg kryterium: Autor

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    Tytuł:
    Some aspects of on board diagnostics systems (OBD) in Poland
    Autorzy:
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/242111.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    vehicle
    chassis dynamometer
    OBD
    exhaust emissions
    Opis:
    An object of the paper is development process of on-board systems diagnostic which can be divided into the historic phase (defined as OBD I), the present term - OBD II and OBD III, and the destination regulation. Established OBD II requirements use allowable the driving emission level limits of the FTP test, however its European EOBD equivalent, effective in Poland, uses limits (together with suitable coefficients of the enlargement) in the NEDC (New European Driving Cycle) test. The research programme of homologation is based on standard driving cycles of characteristic courses of the speed. Conditions of the realization of procedures are selected, so that their meeting in driving cycle is confident and so that its realization secures the correct result. Results of the procedure are illustrated with the original coefficient of the cover of the cycle time by found similar fragments driving cycles. In particular inter alia main criteria of damages according to Californians' CARB OBD II regulations, vehicle performance record during FTP75 test on chassis dynamometer, implementation of oxygen sensor monitor marked with vertical line, RPM, engine loading, engine temperature, speed, NEDC (UDC + EUDC) driving test, temperature chamber and chassis dynamometer stand control devices, dilution exhaust gases device, exhaust gases analyzers are presented in the paper.
    Źródło:
    Journal of KONES; 2011, 18, 2; 191-196
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On board diagnostics (OBD) research in conditions of chassis dynamometer and road tests
    Autorzy:
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/245817.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    vehicle
    chassis dynamometer
    road researches
    OBD
    exhaust emissions
    Opis:
    Subject matter ofthe paper is test results on the chassis dynamometer and road test results in reference to the on-board (OBD) system diagnostics of car vehicles. Test results of vehicles on the chassis dynamometer in temperatures of +22°C and two sub-zero -7°C and -12°C, and also test results of road in reference to chosen car vehicles are presented in the paper. The in effective work ofthe system in temperatures below -7°C was observed. Test results on the chassis dynamometer with test results of road ones are compared. The time 10.9 as the measure of the efficiency of the work of the OBD system is proposed. One gave the proposal of certification of approval research in reference to OBD systems. The paper presents in particular: road emissions of a car during the NEDC (UDC + EUDC) European drive cycle, road emissions of a car during the NEDC (UDC + EUDC) European drive cycle in low temperature chamber (-7°C) in comparison to emissions in temperature -12°C, road emissions ofa car during the European drive cycle in comparison to emissions at oxygen sensor disconnected before catalytic reactor, vehicle speed recorded in road traffic, comparison idea of road cycle piece with pattern cycle similar from point of view speed course, covering coefficients of recorded time for drive cycles, relations between parameters influencing on OBD system reaction time for defect appearing.
    Źródło:
    Journal of KONES; 2011, 18, 4; 141-149
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model of four-stroke combustion engine working process
    Autorzy:
    Ślęzak, M.
    Jankowski, A.
    Wojciechowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/246405.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    combustion engine thermodynamics
    working process
    mathematical modelling
    Opis:
    By defining the fluid's thermodynamic properties, the cycle can be simplified using various assumptions. A lot of models of the combustion engine process were developed that including the thermodynamics, turbulence, and chemical kinetics to predict thermodynamic parameters of the engines. Mathematical model the working process occurring in the cylinder of the four-stroke piston-combustion engine is an object of the paper. The following assumptions consisting in that thermodynamics system is an open thermodynamical system, in accepted model were taken into account. Generalised mathematical model of the working process in the cylinder of the piston-four-stroke combustion engine was worked out. Dependences describing instantaneous volume of the working charge in the cylinder, equation of the balance of the of the working charge quantity in the cylinder and state equation of the working charge in the cylinder were considered at formulating of assumptions. Values of coefficients for each component processes of working cycle with taking into consideration of the dependence concerning the compression process , the combustion process, and expansion process after finishing of the combustion process were an object of worked out mathematical model. For nonstationary processes formulating working cycle of the engine realized during openings of valves (the open system), the quantity and composition of the working charge in the cylinder, its specific heat and temperature are variable. The temperature difference between the working charge and walls temperature of borderering the space of the cylinder was taken into account, too. Generalized mathematical model of the working process in the cylinder of the piston- four-stroke combustion engine applying for the theoretical analysis of the working process in the combustion engine, as well as for working out of experimental results was elaborated.
    Źródło:
    Journal of KONES; 2007, 14, 3; 587-595
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical and real working cycle of four stroke piston engine
    Autorzy:
    Ambrozik, A.
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/243165.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    thermodynamics
    working cycle
    cylinder pressure
    Opis:
    The most important problems concerning analyses of generalized computational thermodynamical working cycle of the four-stroke combustion engine are result of the identification of real indicating diagram. The analysis of working cycle of the four-stroke combustion engine is realized from point of view heat efficiency, the average theoretical cycle pressure, as well as of the influence of the organization working cycle on the value of the maximum pressure in the cylinder of a combustion engine. A novel mathematical model reflecting elementary processes occurring in the cylinder of a combustion engine and connected with it intake and exhaust systems of engine were proposed. Thermodynamical working cycles of four-stroke piston engines, theoretical working cycle of a four-stroke piston engine, thermal efficiency of the theoretical thermodynamic generalised engine work cycle, mean theoretical pressure of the generalised thermodynamic work cycle of a combustion engine, maximum pressure of the theoretical thermodynamic work cycle of a combustion engine, comparative working cycles of piston engines, real working cycle of four-stroke piston engines are presented In het paper. The methods of analyses and calculations referring these engines work cycles were presented. These method show advisability and needs of using them to theoretical calculations and analyses of real work cycles. Generalized engine work cycle was proposed.
    Źródło:
    Journal of KONES; 2007, 14, 2; 9-18
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat release of diesel engine fuelled with RME
    Autorzy:
    Ambrozik, A.
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/247642.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Opis:
    Characteristics of the relative heat release quantity during combustion process have been appointed basing on the analysis of 100 engine work cvcles received from experimental indicator diagrams. Indicator diagrams were obtained at work of the engine according to the external speed engine characteristics. The analysis of indicator diagrams of the engine oriented on to calculating characteristics of the heat release was realized at the regard of the change composition and the working charge quantity of kilo mole during combustion process and at neglect of losses of heat caused with the dissociation combustion products. The quantity heat exchanged between the working charge and walls combustion chamber was appointed basing on the empirical dependence for coefficient proposed by Woschni. Basic technical data of the AD3.152UR test engine, basic physical and chemical properties of fuels used in the researches, research stand scheme, scheme of the measurement system for fas t changing quantities in piston compression ignition engine, changes in the injector needle lift, fuel pressnre in the injection duet, open indicator diagram, exemplary averaged changes in the fuel pressure ralues in the injection duet as the function of crankshaft rotation angle, values of the maximum pressure differences in the nozzle and the engine cylinder, values of spray fuel jet penetration, graphic presentation of the method for the determination of ignition delay angle, values of self-ignition delay angle in an engine, analyses of the relative quantity and rate of the heat release during combustion are presented in the paper.
    Źródło:
    Journal of KONES; 2010, 17, 4; 9-18
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat release characteristics in combustion chamber of CI engine
    Autorzy:
    Jankowski, A.
    Lagowski, P.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/244001.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    internal combustion engines
    diesel engines
    combustion processes
    heat release
    Opis:
    On the basis of the internal heat balance of CI engine with direct fuel injection, the quantity of heat transported during the combustion process from the combustion zone was determined. The real indicator diagrams are the bases for determination of the heat release Characteristics during the combustion process and making up of the internal heat balance. These diagrams were worked out for the engine fuelled with diesel oil for three sets of the injection timing and for work of the engine according to the full load engine Characteristics, and the load Characteristics taken at the engine speedb for the maximum engine torque. Tests with the three different injection timing were carried out. Tests with the load characteristics of the compression-igniting engine for five values of the power were carried out. The pressure in the cylinder of the engine during combustion process was recorded by means of liąuid cooled a piezo-electric quartz sensor with a load amplifier. Characteristics of heat release depended on the composition, temperature and the mol quantity of the working charge in the cylinder during the combustion process. Characteristics of the heat release were determined with the use of the novel calculation program. The program was worked out by authors at the assumption that the process of complete combustion was finished at the moment of the opening of the engine exhaust valve. For purpose of simplification calculation of the quantity of heat lost into the cooling system, the radiation, dissociation and incomplete combustion, were assumed to change during the combustion process in a linear way.
    Źródło:
    Journal of KONES; 2010, 17, 3; 155-164
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and research of piston working conditions of combustion engine in high thermal load conditions
    Autorzy:
    Jankowska-Sieminska, B.
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/243400.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    piston
    thermal load
    thermal expansion
    thermal shock
    Opis:
    Explanation of phenomena occurring in pistons of combustion engines which appear during heating and cooling processes in reference to standard materials and composite materials of high material proprieties is aim of the paper. Bring over researches were mostly directed on measurements of difference dimensions which appear during the piston work in the combustion engine. The paper concentrates on phenomenon of different proprieties of materials. The thermal stresses and shocks differ. In the thermal shock, thermal stresses are caused by instantaneous temperature gradients which appear at high engine speed. These stresses are determined thro temperature distribution and they do not differ from stresses in steady-state conditions. Researches concerning thermal expansions were performed by means of sensitive dilatometer which can work in simple and differential system. Changes of dimensions versus temperature function were measured with inductive sensor and the sensitive Pt-ptrh thermocouple, and results were referred to reference material-Platinum. Research results are illustrated on diagrams of different courses of changes of the of thermal expansion coefficient during heating and cooling of standard and composite materials. Values of the thermal expansion coefficient a for the heating and cooling are smaller for composite alloys. The course of the coefficient â during cooling can be higher or lower from the coefficient a during heating. Similar values were also received. Maximum differences were of 10%. Smaller values of the coefficient a for composite alloys cause that for such the same thermal loads temperature gradients will be smaller for composite alloys. Courses of changes of the coefficient â have a different characteristics suited from chemical composition of alloy, granularity of the composite component and thermal treatment.
    Źródło:
    Journal of KONES; 2007, 14, 3; 233-243
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of thermodynamical parameters of combustion engine working cycle
    Autorzy:
    Siemińska - Jankowska, B.
    Ambrozik, A.
    Jankowski, A.
    Ślęzak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246372.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    engine thermodynamics
    engine working cycle
    Opis:
    Thermodynamics systems may be classified as isolated, closed, or open based on the possible transfer of mass and energy across the system boundaries. An isolated system is one that is not influenced in any way by the surroundings. This means that no energy in the form of heat or work may cross the boundary of the system. In addition, no mass may cross the boundary of the system. A thermodynamic system is defined as a quantity of matter of fixed mass and identity upon which attention is focused for study. A closed system has no transfer of mass with its surroundings, but may have a transfer of energy (either heat or work) with its surroundings. An open system is one that may have a transfer of both mass and energy with its surroundings. Described system being an object of the paper is an open system for some phenomena. An object the paper is the thermodynamical analysis of the filling process of the cylinder which occurs in calculated period from the percussion cap of the position the piston at TDC to it position at BDC, at constant average value of the pressure in the cylinder. During durations of the filling process of the cylinder, dirt of the working charge combustion products are not taken into account. One accepts that the quantity of the working charge in the established point placed on the compression line by piston BDC is equal quantity of the working charge in the end point of the filling process, answering to the start point of the real compression process. The state of the working charge in cylinder described is four parameters: a pressure, a temperature, quantity moles of the working charge and its volume. For appointment those parameters, earlier worked out dependences are put-upon.
    Źródło:
    Journal of KONES; 2007, 14, 3; 563-572
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel method appointing of the effective heat release coefficient during combustion process based on real indicator diagram
    Autorzy:
    Jankowski, A.
    Ambrozik, A.
    Jankowska-Sieminska, B.
    Ślęzak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/244287.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    working cycle
    thermodynamics
    indicator diagram
    heat release
    Opis:
    An object of the paper is a novel method of effective heat release coefficient appointing during combustion process of the based on the real indicator diagram. The process quality of the heat release during process of combustion is evaluated by value of the effective heat release coefficient. Accepted assumptions at appointing effective coefficient of heat release refer to acceptable that thermodynamical parameters of the working charge according to points of the real indicator diagram and the computational diagram are such the same, the maximum pressure of real working cycle of the engine is equal to the pressure of the computational cycle, work of the working charge performed in period from point of closing of the inlet valve to point of the beginning of the exhaust process are for both considered working cycles equal, heat values of the carried to the real and computational cycle are such the same. The method of appointing of the self-ignition delay period is presented in the paper, using to this end intersection point of two graphs of temperature course of the working charge prepared for the first phase of combustion process. Other methods appointing characteristics is suggested in paper basing on the real indicator diagram. The graphic illustration of the preparing method of characteristics of the relative quantity of the heat release during combustion process is illustrated in paper.
    Źródło:
    Journal of KONES; 2007, 14, 4; 133-142
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Driving school students' training with the use of module close to - as a method contributing to change in young drivers' attitude and reducing the number of road accident with their participation in Europe
    Autorzy:
    Wacowska-Ślęzak, J.
    Wnuk, A.
    Jankowska, D. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/244015.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    road traffic safety
    driving school courses
    driving school students
    drivers training
    road accidents offenders
    Opis:
    The aim of the paper is to present the European Project "MODULE CLOSE TO". The project is executed in eleven European Union countries. The paper describes main objectives and guidelines of the project. The project's main result in the final stage should be the development of conditions for unification of drivers''training system across Europe by introducing into drivers' training new educational module. The module consists in realization of educational method called "peer-to-peer" during drivers' training, which is taken from addiction treatment prevention in which a peer reports on a problem to another peer. In drivers' training, the course participants are confronted with road accident offenders (course participants' peers) and their stories, which should lead to positive changes in attitudes and behaviours of young, beginning drivers and therefore to permanent reduction in number of both road accidents and their victims. The preliminary research confirmed that classes with road accident offenders have a positive influence on developing proper attitudes of young drivers. A discussion concentrated on offender, his/her susceptibility to risky behaviours, accident's circumstances, confrontation with its consequences and on serving an adjudged sentence makes an impression on young course participants. The project anticipates introduction of pilot classes in driving schools, high schools, etc. within the framework of drivers' training with participation of road accident offenders and also evaluation of its influence on course participants. The final effect of the project will be the development of conditions for introducing a new educational module into existing drivers' training system as well as developing conditions for recruiting accident offenders and actions motivating them to join the project realization.
    Źródło:
    Journal of KONES; 2008, 15, 2; 531-536
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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