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This paper presents methodology to determine the contribution of each motion resistance in mechanical energy demand based on real life speed profiles. Example results are also shown based on data obtained in different traffic conditions: urban, highway, extra urban. Article includes theoretical basics of calculation of mechanical energy demand, means to obtain data by means of a Smartphone, and description...
The results resistance of loss motion diesel engine for different temperatures of lubricating oil is presented in the paper. Tests were performed to evaluate the effect of lubricating oil temperature of friction losses in engine. In addition to friction losses in the bearings of the crankshaft and a group of piston rings – piston – cylinder, the friction loss due to charge exchange in the cylinder...
Vibro-thermography is a new Non-Destructive Inspection method that can be applied to the diagnosis of aircraft fuselage parts and wind turbine propeller blades. In this method, the ultrasound source of energy is used to excite internal particles of the examined composite material damaged by an impact to induce thermal differences between the solid part of material and the damaged area. The results...
The article presents an overview of the concept of process definition which is widely used in various fields of life and, depending on the area, it is definitions adopt slightly different meanings. The analysis of the definitions allowed the authors arrive at a conclusion that processes are of a dynamic nature which is indispensable for the operation of every enterprise. The study also considered...
The aim of this paper is to present the effect of a chosen gait algorithm on the forward speed of the robot and on the joint load values. To this end a motion simulation study was carried out using Solidworks software package, comprising kinematic and dynamic analyses. It also presents the forward and reverse kinematics solutions for the insect-like walking robot leg.
Particulate matter emissions from aircraft engines is the issue increasingly discussed among researchers active in the field of ecology of aviation. This fact is mainly caused by negative effects of particulate matter on human health and the latest research results, which indicate that the particle matter emitted from aircraft engines are characterized by very small dimensions. The article presents...
The aim of the research was to assess the external signals of fuel injection by piezoelectric injectors of engines fueled with gasoline and diesel fuel. The assessment focused on the delay analysis of fuel injection start in relation to the time of appropriate control signals occured. The research on these relations was conducted with the use of the system for analysing fast-varying processes and...
The purpose of this paper is to present the relationship between loading of the leg and the posture of an insect-like robot determined through computer simulation study. It presents the results of a static FEM analysis of a 3D robotic leg model performed using Abaqus 6.13. It also presents the kinematic structure of an insect-like walking robot capable of object manipulation.
The AeroSafetyShow Demonstrator+PL project was created in response to the lack of a comprehensive solution for general aviation, which would make it possible to control aircraft flight parameters in real time. The system determines the aircraft’s position using, among other sources, the Global Navigation Satellite Systems. In order to increase the attractiveness and the level of safety of the proposed...
In the paper the innovations, their understanding and role in economy are shown. Then their main classification is presented and based on it, the examples are reviewed. Categories of activities and exemples of activities leading to creation of innovations are discussed in next part of paper. At the end, qualitative and quantitative approach to data on innovative activities are presented.
One of the main difficulties associated with the use of FAME biofuel (fatty acid methyl esters) in its pure form as an engine fuel is its destructive effect on fuel system components made with traditional materials. This applies to both elements made out of metal (corrosive effect), as well as synthetic materials. This study attempts to assess the impact of FAME biofuel on sealing elements of fuel...
The dynamic growth of air transport is associated with an increased amount of used aircraft. This involves with the need to conduct research on issues of safety in air transport. The most common cause of aviation accidents is still the human factor. The paper presents a study of attentional control during the simulator training carried out at the Institute of Internal Combustion Engines and Transport...
This paper presents an indicator analysis of the impact of the characteristics of an electronic ignition system on the operating conditions of a two-stroke spark ignition engine. The tests were carried out on a single-cylinder two-stroke engine equipped with a combustion pressure sensor using the apparatus for recording fast-varying signals. The influence of changes of the ignition angle of advance...
Risk management is an essential tool for the implementation of safety policy within the framework of safety management systems deployed in all enterprises involved in the management of railway infrastructure and transport operations on the fundamental European Union rail network. The idea of risk management, however, is much younger than the railway system and therefore it is sometimes regarded as...
The first part of this paper presents an evaluation of the rheology of three fuel types for compression ignition engines, i.e. a conventional fuel grade and two biofuel grades, each with rapeseed oil. The analysis completed for this work has uncovered that a clear relationships exist between fuel temperature, density and viscosity. The second part of this paper is a determination of stream parameters...
The paper presents a part of research on bolted connections based on the system approach to the problem of their modelling and calculations. With this approach it is possible to individual consideration of each system element in order to find the best model of the element. The aim of this study is to develop a model of the single-bolted joint separated from the bolted connection. An analysis is conducted...
The use of alternative energy sources for internal combustion (IC) engines is being raised. The most promising fuel in such application is natural gas in gaseous state, which mainly consists methane. It is mainly being used as an engine fuel for both monofuel and dual fuel configuration. Many investigations confirmed the benefits of application of dual fuel compression ignition engine fuelled with...
In recent years, the introduction of modern solutions to energy sector beyond energy efficiency places special emphasis on environmental issues. They concern efforts to achieve the lowest possible carbon dioxide emissions and toxic substances into the atmosphere. One of the main methods to reach this goal is using biomass as fuel. Because of its life cycle, biomass is considered as neutral to the...
Significant content of SO3in exhaust gases generates difficulties in maintenance of metallurgical plants and large combustion installations. To minimize the range of this problem, numerical models of reacting flow can be introduced to the designed process. Modeling combustion and post combustion of SO3formation requires adding reaction mechanism of reactive mixture to flow equations. In this work...
The basis of a combined cycle gas turbine mass and energy balance, carried at the concept stage, preliminary design or during analysis, is the calculation of the gas turbine design point. This article presents a gas turbine unit mathematical modelling process intended for implementation of the model in a computer program. The aim of the development was a relatively simple, practical from engineer’s...
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