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Analysis of the use of OBD II / EOBD congestion diagnostics in the light of vehicles operation and their technical condition

Szokało A. A., Rychter M.

Journal of KONES

2018

Vol. 25, No. 2

371--378

Transport in human life has played a key role since ancient times. At the turn of years it has evolved, initially using only the power of human legs, then the animals until use internal combustion engines. The first internal combustion engine was presented by Brackenburow in 1836. The construction showed a very desirable type of combustion engine – burning a mixture of hydrogen and oxygen and expelling clean water as exhaust gas. However, the invention was abandoned due to its innovativeness and lack of trust in it. The topic was again taken in 1860 presenting a two-stroke engine using a mixture of natural gas and air with spark ignition. Striving for even greater perfection, Rudolf Diesel in 1893 presented and patented the first self-ignition diesel engine. The first solution, although used today, has shown that automotive engines leave a significant margin of reliability. The operational reliability of internal combustion engines is important in relation to the conditions of their operation and technical condition. The impact of toxic substances in exhaust gases and their impact on the natural environment these days is an important issue. One of the forms of work on the problem is the current diagnosis of engine operation. This was possible thanks to the use of the OBD I system, which was later transformed into OBD II / EOBD and the result of the test results obtained to the applicable EURO standards. The system allows testing during a road test in normal car operation. Using the OBD recorder, the operation of an example vehicle will be analysed in various operating conditions, and the obtained results will provide diagnostic possibilities.

Zmiany lepkości kinematycznej olejów silnikowych w toku eksploatacji

Szczyglak P., Napiórkowski J., Sobiecki M.

Logistyka

2015

nr 4

5983--5990, CD 2

W pracy przeprowadzono analizę literaturową przyczyn zmiany lepkości kinematycznej olejów silnikowych w toku eksploatacji. Zidentyfikowano czynniki mające wpływ na intensywność tego procesu, do których zaliczyć można: jakości zastosowanego oleju, stan techniczny silnika, zastosowane rozwiązania konstrukcyjne, jakość spalanego paliwa i warunki eksploatacji. Przygotowano metodykę badań eksperymentalnych, których celem było wyznaczenie charakterystyk lepkości zależnych od przebiegu pojazdu, zanieczyszczenia paliwem oraz płynem z układu chłodzenia. Ustalono wartość maksymalnego zanieczyszczenia oleju Selenia WR 5W-40 paliwem Orlen ON Verva, po przekroczeniu którego występuje wysokie ryzyko zerwania filmu smarowego. Przedstawiono wyniki badań lepkości oleju silnikowego eksploatowanego w czterech pojazdach: Dacia Logan MCV, VW Passat, Fiat Panda, VW Golf III. Wykonano wizualizację wyników zarejestrowanych w czasie badań i na ich podstawie wygenerowano równania opisujące zależność lepkości od przebiegu pojazdu. Sformułowano wnioski końcowe.

The paper investigates the causes of kinematic viscosity changes in motor oils during operation. Factors affecting intensity of the process were identified, including: the quality of oil used, technical condition of the engine, design solutions adopted, quality of fuel being combusted and operating conditions. Methodology for experimental tests was developed in order to determine viscosity characteristics depending on the vehicle mileage, oil contamination with fuel and engine coolant. The maximum contamination level of Selenia WR 5W-40 oil with Orlen ON Verva fuel was determined, beyond which there is a high risk of breaking the lubricating film. Viscosity tests results were presented for motor oil used in four vehicles: Dacia Logan MCV, VW Passat, Fiat Panda, VW Golf III. Visualisation of the results recorded during the tests was performed and, based on the results, equations were generated which determined the relationship between viscosity and vehicle mileage. Final conclusions were drawn.