A Method to Obtain a Generalized Model of the Pressure Evolution within the Braking System of a Vehicle

2013 ◽  
Vol 837 ◽  
pp. 434-439 ◽  
Author(s):  
Marin Marinescu ◽  
Radu Vilau ◽  
Marian Truta ◽  
Octavian Fieraru
Keyword(s):  
Traffic Safety ◽  
Road Network ◽  
Technical Condition ◽  
Parametric Models ◽  
Fast Method ◽  
Braking System ◽  
Military Vehicles ◽  
Technical Status ◽  
National Road ◽  
The Military

Military vehicles have to travel, at least from time to time, on the national road network. Whenever that happens, the legal requirements have to be met with respect to the systems that contribute to the traffic safety. One of these systems is the braking system. On the other hand, most of the military vehicles arent that up-to-date that the rest of the traffic partners are. Therefore, a military automotive engineer should have at hand a fast method to diagnose the technical status of the braking system even the checked vehicle is rather old. It would be also even better if the faulty party were accurately identified. The paper aims at providing a method helps the diagnosing teams to quickly compare the behaviour of an actual vehicle braking system status with a general model that had been acquired by tests. Since nobody provided that kind of information during 70s, our model derived from a large number of tests that have been performed on good technical condition vehicles. Key words: vehicle braking system, parametric models, data-based models.

scholarly journals Ways to Determine the Technical Status of the Vehicles’ Braking System by Means of General Diagnosis

2017 ◽  
Vol 22 (1) ◽  
pp. 60-63
Author(s):  
Paul Todea ◽  
Daniel Lazăr
Keyword(s):  
Road Safety ◽  
Field Experiments ◽  
Technical Condition ◽  
High Coefficient ◽  
Braking System ◽  
Technical Status ◽  
Specialized Equipment ◽  
Maintenance Work ◽  
And Control

Abstract Vehicles’ breaking system is one of the basic elements that lead to the maintenance of technical and road safety during transport activities on public roads or other special conditions. Therefore, particular attention is paid to all maintenance work planned or occasionally carried out on such system, as a high coefficient of vehicles availability results in an increased percentage of their productivity. Of course, there is diagnosis equipment for each element, and the brake booths within MOT centres accurately indicate the values of the measured parameters, following repair, adjustment and control operations for troubleshooting. Still, there are certain cases requesting the check of breaking system either analytically or by field experiments, i.e. when vehicles are driven on rough and rugged ground, during military specific missions and activities, where their performance no longer allows specialized equipment or when such equipment does not exist. This works presents alternatives to determine the technical condition of the braking system by means of typical solutions for the general diagnosis type.

Framework for investigating the effect of different design lives on the design of bridges

2021 ◽  
Author(s):  
Egor Svechnikov ◽  
Johan Maljaars ◽  
Bert Snijder ◽  
Johan de Boon ◽  
Eize Drenth
Keyword(s):  
Optimal Design ◽  
The Netherlands ◽  
Optimum Design ◽  
Functional Capacity ◽  
Road Network ◽  
Developed Countries ◽  
Research Activities ◽  
Design Life ◽  
National Road ◽  
Structural Solutions

<p>Many developed countries have a national road network including a significant number of bridges in need of renovation or replacement in the coming years. The reason for this is their technical and functional capacity becoming insufficient due to aging and changes in societal demands. Therefore, these bridges need to be adjusted or replaced. National authorities in The Netherlands currently require a design life of 100 years for new bridges, however nowadays it seems reasonable to have a certain flexibility for this parameter. Since the selected design life has its implications on structural solutions and choice of materials, the identification of the optimal design life for bridges seems necessary. This paper gives a summary on the issue regarding the optimum design life of bridges and it highlights the framework of the upcoming research activities.</p>

Investigation of the interaction of car wheels with the stand rollers during braking

2021 ◽  
Vol 13 (1) ◽  
pp. 68-77
Author(s):  
Igor Мarmut ◽  
◽  
Andriy Kashkanov ◽  
Vitaliy Kashkanov ◽  
◽  
...  
Keyword(s):  
Traffic Safety ◽  
Technical Condition ◽  
The Body ◽  
Power Model ◽  
Equilibrium Equations ◽  
Design Features ◽  
Complex Objects ◽  
Passenger Cars ◽  
Wheel Drive ◽  
Four Wheel Drive

The article discusses the issues of modeling conditions for obtaining diagnostic information about complex objects. As an example, the study of the braking qualities of four-wheel drive cars on an inertial roller stand is considered. Diagnosing the technical condition of cars from the point of view of traffic safety is one of the most important problems. This is especially important for systems whose technical condition affects traffic safety: especially braking systems. Foreign and domestic experience testifies to the effectiveness of instrumental control. The diagnostic equipment includes roller stands, on which you can check the braking properties of cars. As shown by many studies, in particular, carried out at the Department of Technical Operation and Service of Automobiles, KhNADU (HADI), inertial stands provide more reliable information about the technical condition of the car. Such stands allow you to reproduce the real speed and thermal modes of the brakes (especially those equipped with ABS). To improve the accuracy of diagnosing a car on a roller stand, it is necessary to have an idea of the nature of the interaction of the car wheels with the rollers. The studies of wheel rolling on the stand rollers have been carried out by many authors since the 80s of the last century. However, all these studies were carried out on uniaxial stands and for mono-drive vehicles. Nowadays, a large number of passenger cars have four-wheel drive. Rolling of the wheels of such cars on rollers and their interaction has practically not been studied. Therefore, a return to the study of this issue is relevant. A power model of the system of interaction between the car and the stand has been developed, taking into account the design features of the stand and the design features of the car's suspension. The power model of the system under consideration contains the equilibrium equations of the body and two bridges and the equations of motion of the rollers and wheels of the car. Based on the results of the analysis of the acting forces in the "car-stand" system, the braking moments on the wheels M and the coefficients of the use of the load q during the braking tests of a 4x4 vehicle were determined. The obtained research results allowed to improve the theory of interaction of a car wheel with the rollers of an inertial diagnostic stand.

scholarly journals Mathematical models as practical tool for road fatalities forecasts on road network in regions

2018 ◽  
Vol 231 ◽  
pp. 01018 ◽  
Author(s):  
Joanna Wachnicka
Keyword(s):  
Mathematical Models ◽  
Traffic Safety ◽  
Road Safety ◽  
Regression Models ◽  
Road Network ◽  
Statistical Data ◽  
Safety Management ◽  
National Data ◽  
Local Characteristics ◽  
Practical Tool

The analysis of national data on the number of deaths showed that in Poland from 2010 to 2016 it was possible to reduce the number of fatalities by about 22%. The tendency of changes in the number of fatalities, however, is not homogeneous. When data of individual voivodships is analyzed, the situation is different. The largest reduction in fatalities in the analyzed period of time concerned voivodship Świętokrzyskie, where there was more than 45% drop in the number of fatalities. The following voivodships: Łódzkie, Lubelskie and Podkarpackie recorded a decrease in over 30% of fatalities. Unfortunately, at the end of the classification there were four voivodships with a fall below 8%, and what is disturbing voivodship Lubuskie recorded a nearly 5% increase in the number of fatalities. The current traffic safety management at the level of voivodships is often the implementation of central recommendations, which, as results from the analysis of statistical data, are not equally effective in every province. Therefore, models for forecasting changes in road safety are required. Taking into account local characteristics and implemented actions can be used to manage security more effectively at the regional level. This paper presents examples of the use of mathematical models to predict the number of fatalities in individual voivodships depending on the adopted action scenarios. Regression models were developed, taking into account demographic, infrastructural, economic and automotive factors. It turned out that in individual voivodships, various factors affect the level of road safety on roads differently. Therefore, an individual approach to each voivodship is important in order to reliably forecast the level of security.

scholarly journals ON THE ISSUE OF IMPROVING THE CRIMINAL LAW NORMS ON LIABILITY FOR VIOLATION OF THE RULES OF DRIVING OR OPERATION OF CARS

2021 ◽  
Vol 37 (1) ◽  
pp. 101-106
Author(s):  
V.V. Kusakin ◽  
Keyword(s):  
Russian Federation ◽  
Traffic Safety ◽  
Criminal Liability ◽  
Criminal Code ◽  
Military Vehicles ◽  
Judicial Practice ◽  
Observation Methods ◽  
Expert Assessments ◽  
The Russian Federation ◽  
Criminal Legislation

The article is devoted to the analysis of Article 350 of the Criminal Code of the Russian Federation, which provides for criminal liability for violation of the rules of driving or operating cars, the evolution of this article and the problems of sentencing under it are considered. One of the suggestions for improving this article is to change its sanction, which will eliminate the identified significant legal gap. The author conducted a comprehensive analysis of various aspects related to the criminal violation of traffic safety rules and the operation of military vehicles, and proposed the author's solution to the problematic aspects. The study used specific dialectical methods: comparative, hermeneutical, discursive, formal-legal, as well as some sociological methods: observation, methods of expert assessments and analysis. The provisions contained in the materials of the article can be used to improve the current criminal legislation and to develop explanations of the Plenum of the Supreme Court of the Russian Federation in reviews of judicial practice.

scholarly journals Evaluation of the diesel engine feed by unified battlefield fuel F-34/F-35 mixed with biocomponents

2019 ◽  
Vol 178 (3) ◽  
pp. 240-246
Author(s):  
Mirosław KARCZEWSKI
Keyword(s):  
Diesel Engine ◽  
Ethyl Alcohol ◽  
Diesel Oil ◽  
Fuel System ◽  
Military Vehicles ◽  
Anhydrous Ethyl Alcohol ◽  
The Common ◽  
Fuel Mixtures ◽  
The Military

The problem of the military vehicles engines fuelling increases with the growth of the amount of vehicles in the armies. At the same time, another problem with fuel supply in modern engines is the use of bio component additives, which changes characteristics (quality) of the used fuels. Therefore, it is important to take actions to adapt engines to powering with fuels coming from renewable sources.The aim of the research was to evaluate the possibility of feeding the diesel engine (influence on the useful parameters and composi-tion) with mixtures of the unified battlefield fuel F-34/F-35 with biocomponents in the form of anhydrous ethyl alcohol and RME. The tests were conducted during fuelling of the engine with six kinds of fuels: basic fuel (diesel oil), NATO code F-34/F-35 fuel, as well as fuel mixtures: F-34 and RME with different ratio and F-34/F-35 with bioethanol. In the result of the research it was concluded that the parameters of the G9T Renault engine with the common rail fuel system in terms of F-34 and RME consumption (using) decreased in comparison to diesel oil basic fuel. It is not possible to supply the engine with the mixture of ethyl alcohol and F-34 fuel – alcohol pre-cipitation and obliteration of fuel system components

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