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Due to systematic reduction of he permissible levels of harmful and toxic substances in the exhaust gases, particulary of which particulate matter appears to be unfavorable, there is a continuing need to improve the fuel injection parameters. One of the factors determining the correct fuel injection is the injection pressure, which strongly depends on the design of the common-rail pump. This article...
The operational problems of currently manufactured high-pressure injection pumps are related to the use of fuels with inadequate lubricating properties. Even one-time use of fuel that does not meet the requirements assumed by the manufacturer may lead to irreversible changes in the structure of joints, which is tantamount to, among other things, change of the friction coefficient and attenuation in...
The dynamic development of the automotive industry makes the consumption of diesel oil grow rapidly. Due to the increasing ecological requirements, research is conducted that aims at the reduction of the negative influence of this branch of industry on the environment. One line of research is the search for ecological fuels, such as dimethyl ether. The application of this fuel with a simultaneous...
The article describes the impact of toxic components of exhaust gases on the environmental pollution and the resulting problems that have a direct impact on human health. It presents the legal regulations in force in the European Union which oblige vehicle manufacturers not to exceed the limit values for emissions of toxic exhaust components. It shows the influence of the motor vehicle speed on the...
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 article presents the influence of harmful exhaust gases from motor vehicles on the environment. The continuous increase in the number of vehicles in operation makes this problem become more and more noticeable. The legal aspects and technical solutions designed to limit the negative effects of exhaust gas emission are presented.
The paper presents selected aspects of the technical condition of the vehicles operating in Poland, the quantitative status of a selected group of vehicles and the requirements to be met during compulsory inspections at diagnostic stations in terms of exhaust emissions. The results of studies have been presented and they indicate a group of vehicles which do not meet the required limits of exhaust...
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