Algorithm for diagnosing Skoda car engine based on training stand developed.
Students Name: Romaniuk Anatolii Serhiiovych
Qualification Level: magister
Speciality: Motor Vehicle Transport
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Anatolii Romaniuk A.S. Roman Kachmar (promotor). Algorithm for diagnosing Skoda car engine systems on the basis of a training stand // Master’s qualification work. - Lviv Polytechnic, department "Exploitation and repair of motor vehicles", - Lviv, 2020. Extended annotation. The car repair and maintenance industry is currently in an unfavorable economic situation, in particular, the car engine is equipped with increasingly complex electronic systems, and the cost of maintenance for consumers is constantly growing. Analysis of the car market in Ukraine shows that widespread gasoline cars with pulsed fuel injection, which use electromagnetic injectors [1]. To ensure stable engine operation, it is necessary to timely maintain systems that affect the energy and environmental performance of the engine. It is well known that even, at first glance, imperceptible malfunctions of the ignition system (reduction of breakdown voltage, violation of energy storage time, violation of the ignition advance angle, etc.) significantly increase fuel consumption and increase the content of harmful substances in exhaust gases [2]. At present, Ukraine operates a large number of cars imported from abroad. Most of these cars have a fairly long service life and, as a result, they are operated with many faults, including faults in engine systems. The process of diagnosing electronic and electrical systems of a car engine requires constant improvement along with the constant complexity of the design of a modern car and more stringent environmental requirements. The object of research is an algorithm for diagnosing Skoda car engine systems. The subject of research - the laws of diagnosing Skoda car engine systems. The purpose of research: to improve the level of knowledge about the design and technology of car engine diagnostics by manufacturing and researching a laboratory stand of the BFQ engine of a Skoda car. The general diagnostics of the engine is carried out and its general technical condition is defined. Fault codes, sensor signals processed by the electric control unit, stability and uniformity of engine operation in different modes were checked. The study found that due to the lack of a mass flow sensor, there is a constant error of the pressure sensor in the manifold. An algorithm for diagnosing car engine systems has been developed, which allows diagnosing the main indicators of the unit, reading and storing them in the software store. This makes it possible to timely identify and prevent problems and failures that may occur during operation of the car. The growing complexity of control objects in automotive technology, increasing the sources of information, taking into account the dynamic properties of objects and systems, imposes high requirements on the accuracy and objectivity of diagnosis [3]. Keywords: algorithm, diagnostics, engine, engine mounts, OBD-cable, car endoscope. References 1. Kachmar OP S. Methods of diagnosing the ignition system of an internal combustion engine [Electronic resource] / Sodil VO Kachmar OP // Student science. - 2015. - Resource access mode: https://www.kosmach.in.ua/studencheskaya-nauka/metodi-diagnostuvannya-sistemi-zapalyuvannya-dviguna-vnutrishnogo-zgorannya. 2. Method of automated diagnostics of ignition system and control system of automobile engine: monograph / Yu. Yu. Kukurudziak, VV Rebedaylo. - Vinnytsia: VNTU, 2010. - Mode of access to the resource: http://www.uk.x-pdf.ru/5raznoe/1219643-1-yu-kukurudzyak-rebedaylo-metod-avtomatizovanogo-diagnostuvannya-sistemi-zapalyuvannya-sistemi -keruvannya-avtomobilnim-dv.php