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The paper describes a range of actions required to adjust a spark-ignition engine for fuelling with hydrogen. It presents a great number of advantages and disadvantages of using hydrogen as a fuel as well as advantages of engine cold start using hydrogen instead of unleaded petrol. The process of hydrogen oxidation in spark-ignition engine’s combustion chamber was theoretically described. Water is...
The article presents the selected properties of methyl esters of rapeseed oil produced in the process of innovative waste-free production technology. The basis for the proposed technology is the process of transesterification of rapeseed oil with methyl acetate carried out in the presence of an alkali catalyst and with the use of ultrasounds. As a result of tests carried out, optimum conditions for...
The toxic components of the exhaust gas pose a major problem related to internal combustion piston engines. The requirements that those engines have to meet concern the reduction in emissions of the exhaust gas harmful compounds. The paper presents selected results of experimental investigations into the Fiat 1.3 Multijet engine equipped with the Common Rail fuel system. The engine was fuelled by...
The paper shows selected results of simulations performed in AVL Boost software, covering several aspects of methane combustion in compression ignition engine with the participation of pilot injection of diesel fuel.
The paper concerns an issue of the influence of car motion model on the indicators characterizing the environmental impact of the vehicle in Life Cycle Assessment (LCA). The research takes into account different conditions of car driving: urban (including congestions), extra-urban and high-speed traffic. Data on emission and fuel consumption corresponding to specific driving conditions were derived...
W opracowaniu omówiono podstawową budowę instalacji zasilania gazem, w pojazdach z silnikami o zapłonie iskrowym oraz podstawową problematykę ich działania. Celem badań było dokonanie analizy emisji szkodliwych substancji, dla dwupaliwowego układu zasilania silnika. Dokonano pomiarów dla pracy na benzynie, na gazie oraz na modyfikowanej mapie gazowej. Jako bazowe ustawienia przy zasileniu silnika...
The article presents selected results of the impact of ozone on the combustion process the diesel engine Perkins 1104C-E44TA. Two ozone generators were supplied to the engine intake system in four doses of 17.5, 35, 52.5 and 70 g / h. The results include the waveforms of pressure of the working medium, the heat release and the degree of burning fuel dose for 100%, 50% and 10% of the maximum load.
This publication is devoted to the analysis of the distribution of the duration of the particular operating statuses of the Passenger Information System of the Warsaw Metro. Firstly, I specify the operating statuses that the system can reach. Secondly, I present a directed graph of the operation process, which enables to identify all the possible transitions between the specified states, and, ultimately,...
One of the serious problems faced by the researchers in creating HCCI-engine is impossibility to arrange on the practice the regulation of its power. The problem of power control of HCCI engine can be solved using discrete frequency method of adjustment. Such method that can be used in multi cylinder internal combustion engine is proposed and justified. This method allows the engine to operate in...
This paper presents a concept of construction and control of hybrid powertrain comprising of combustion engine and pneumatic-hydraulic motor. Additionally, driving ranges and construction of currently produced hydraulic and electric hybrids powertrains were compared. The paper presents current knowledge in this field as well as assumptions, factors, and contributions that guided the selection of technological...
In an article titled: Analysis of methods of wheel speed measurement using magnetic sensor mounted in vehicle presents the construction and method of manufacture modern tyres and including consideration of magnetic properties of the individual components of the tyre. Furthermore, it provides methods for measuring pneumatic wheel speed and analysis of existing solutions patents in this field. As well...
Engine oil is a lubricant in internal combustion engines, whose main task is to protect engine components working in different conditions. Conditions such as frequent change of of humidity, pressures, temperature and loads, as well as mechanical impurities and chemicals make the environment in which it works engine oil is not favorable. The paper attempts to evaluate the wear resistance of engine...
In the paper, analysis concerning the influence of the center of mass disturbance on the stability of a mathematical model of a motor vehicle is presented. Sudden disruption of the linear motion caused by the impulse turn of the steering wheel by 90 degrees was taken into account, as well as motion of the vehicle model along the road with randomly uneven surface. Probability of stable motion was discussed...
The engines stand out a lot of systems to provide correct operation of these engines, they also include the cooling system, which is designed to maintain a constant temperature and optimum operating conditions of the engine. Cooling systems are often badly supported by the users because they do not represent safety when driving a motor vehicle. Users and vehicle mechanics forget, however, that the...
The article relates to a braking system project designed for a light electric vehicle taking part in international races. The braking system of such a car must combine minimization of weight, efficiency and reliability. These features have set the direction of the process of the project, which began with a review of available options. Then the analysis was conducted including both pros and cons of...
This work presents a thermodynamic analysis for thermodynamic processes taking place in the Stirling engine working space. The working space was divided into operational sections, which corresponded to the analysed control volume units, including: the compression space, cooler, regenerator, heater, and the expansion space. On the basis of the conducted thermodynamic analysis, useful relations were...
This work presents an adiabatic analysis for thermodynamic processes taking place in the Stirling engine working space. The working space was divided into operational sections, which corresponded to the analysed control volume units, including: the compression space, cooler, regenerator, heater, and the expansion space. On the basis of the conducted thermodynamic analysis, useful relations were derived,...
This paper gives an overview of the driver behaviour in simulated emergency situations. Driver testing can be conducted for many different purposes. One of the major objectives is to determine the effect of various factors on the driver behaviour in emergency situations and, accordingly, on the traffic safety. This paper discusses results of track-based investigations conducted for a period of 10...
The aim of this study was to design and build a prototype of an electronic control with actuators for the automation of the lift in the agricultural tractor and the approximation of existing solutions. It is a system consisting of a main controller integrated in a single housing with MMI, the H-bridge circuit with surge protection, the degree of power and system for measuring the current drawn by...
The article presents a conceptual way of controlling the pneumatic-hydraulic power unit, for which the basis of the literature was performed simulation model and simulation research. The simulation results allowed the selection of actuators and to develop ways to control this type of drive unit. Proposals coming from previous work led to the development of pneumatic-hydraulic drive unit, which was...
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