Aerospace technic and technology

Despite the successes in research and development of designs of modern internal combustion engines for various purpose vehicles, including aircraft, to date, no reliable methods have been created to determine the causes of their failures. The application of well-known methods in practice, including the diagnosis of engine technical condition, not only requires a lot of labor and highly qualified personnel but in many cases, it is practically ineffective. This is especially true for severe operational damage arising from the destruction of the parts and accompanied by disturbing the synchronization of their reciprocating and rotational motion. On the other hand, the performed research shows that the causes of ICE failures can also be determined by logical-probabilistic methods, including based on the fault tree analysis, drawing on the available experience of studying various engine faults. However, it is not possible to use the well-known models and methods built based on the failure tree analysis in problems of finding the causes of engine failure. The reason is since such methods have been developed for the tasks of calculating the reliability characteristics of developed engines, rather than finding the causes of their failure in operation. The solution to this problem was found in several stages. Initially, by structuring the symptoms, a fault tree was compiled that logically describes the cause-effect relationships between the failure event and the initial damage that caused it. This is done separately for each of the types of failures selected for analysis and associated with severe damage to the studying engine type. Further, for a finite number of selected types of failures, a modified (inverted) fault tree was developed. It allows you to perform a simple logical analysis in the opposite direction to the generally accepted direction - from the system failure event to the basic events initiating the failure. After that, a modified engine fault tree common to the considered types of failures was compiled. As a result of using the proposed methodology in practice, it became possible to determine the causes of engine failure with sufficient reliability with minimal time.

internal combustion engine; fault; failure; logical method; fault tree analysis

Van Basshuysen, R., Schäfer, F. Internal Combustion Engine. Basics, Components, Systems, and Perspectives. Warrendale, SAE International, 2004. 812 p.

Greuter, E., Zima, S. Engine Failure Analysis. Internal Combustion Engine Failures and Their Causes. Warrendale, SAE International, 2012. 582 p.

Khrulev, A. E. Remont dvigatelei zarubezhnykh avtomobilei [Foreign car engine repair]. Moscow, "Za Rulem" Publ., 1998. 440 p. (In Russian).

Khrulev, A. E., Drozdovskiy, V. B., Losavio, S. K. Expertiza tekhnicheskogo sostoyaniya i prichiny neispravnostei avtomobilnoi tehniki [Technical condition expertise and fault causes of vehicle]. Moscow, ABS Publ., 2019. 966 p. (In Russian).

Migal, V. D. Tekhnicheskaya diagnostika avtomobilnykh dvigatelei. T.2. Neispravnisti, parametry i sredstva diagnostiki [Technical diagnostics of automobile engines. V.2. Faults, parameters and diagnostic tools]. Kharkov, Maidan, 2014. 403 p. (In Russian).

Engine components and filters: defects, their causes and prevention. Technical information. Mahle GmbH, 2015. 75 p. Available at: www.mahle–aftermarket.com (accessed 20.07.2020).

Piston damage – Recognizing and rectifying. Neckarsulm, MSI Motor Service International GmbH, 2014. 103 p.

Migal, V. D. Tekhnicheskaya diagnostika avtomobilnykh dvigatelei. T.3. Prakticheskie osnovy diagnostirovaniya [Technical diagnostics of automobile engines. V.3. Practical Diagnostic Basics]. Kharkov, Maidan, 2014. 444 p. (In Russian).

Maurya, R. K. Reciprocating Engine Combustion Diagnostics. In-Cylinder Pressure Measurement and Analysis. Mechanical Engineering Series. Cham, Springer Nature Switzerland, 2019. 616 p.

Isermann, R. Combustion Engine Diagnosis: Model-based Condition Monitoring of Gasoline and Diesel Engines and their Components. Berlin, Springer-Verlag GmbH, 2017. 303 p.

Shubin, R. A. Nadezhnost tekhnicheskikh sistem i tekhnogennyi risk [Reliability of technical systems and technological risk]. Tambov, Publ. FGBOU VPO "TGTU", 2012. 80 p. (In Russian).

Aircraft Reciprocating-Engine Failure. An Analysis of Failure in a Complex Engineered System, ATSB Transport Safety Investigation Report, Aviation Safety Research and Analysis Report B2007/0191. Canberra City, Australian Transport Safety Bureau, 2007. 255 p.

Laskowski, R. Fault Tree Analysis as a tool for modeling the marine main engine reliability structure. Scientific Journals of the Maritime University of Szczecin, 2015, vol. 41, no. 113, pp.71-77.

Khrulev, A.E. Ispolzovanie logiko-veroyatnostnykh metodov dlya opredeleniya prichin otkazov turbokompressorov v expluatatzii DVS [Applying logical and probabilistic methods to determine the causes of failure of turbochargers in the internal combustion engines operation]. Vehicle and Electronics. Innovative Technologies, 2019, no. 16, pp. 5-18. DOI: 10.30977/VEIT.2019.16.0.5. (In Russian).

Miller J. Turbocharger Failure Analysis: What Went Wrong and How to Fix It. MUSCLE CAR DIY, 2015. Available at: https://www.musclecardiy.com/performance/turbocharger-failure-analysis-went-wrong-fix/ (accessed 20.07.2020).

Khrulev, A. E., Kochurenko, Yu. V. Metodika opredeleniya prichiny neispravnosti DVS pri tyazjelykh expluatatzionnykh povrejdeniyakh [Method for determining the cause of ICE failure for severe damages in operation]. Internal Combustion Engines, 2017, No.1, pp. 52-60. DOI: 10.20998/0419-8719.2017.1.10. (In Russian).

Khrulev, A. E. Modelirovanie povrejdeniya shatuna pri postuplenii zhidkosti v cilindr DVS [Simulation of connecting rod damage when fluid enters the internal combustion engine cylinder]. Vehicle and Electronics. Innovative Technologies, 2020, no.17, pp. 5-18. DOI: 10.30977/VEIT.2226-9266.2020.17.0.5. (In Russian).

Khrulev, A. E., Krotov, M. V. Vliyanie neispravnostei v sisteme smazki на kharakter povrejdeniya podshipnikov DVS [Influence of the lubrication system faults on the nature of internal combustion engine bearing damage]. Internal Combustion Engines, 2018, no.1, pp. 74-81. DOI: 10.20998/0419-8719.2018.1.13. (In Russian).

Khrulev, A., Samokhin, S. Diavol v detalyakh, Ch.1 [Devil in details, P.1]. ABS-auto, 2012, no. 1, pp. 22-25. (In Russian).