Agricultural Engineering, Volume 50 (2018)

RELIABILITY EVALUATION OF THE OFF-ROAD VEHICLES

Edgardas Andrianovas, Juozas Padgurskas
Aleksandras Stulginskis University

Abstract

The research aim is to analyze the reliability of off-road vehicles, to determine the factors affecting it, and to provide recommendations for the increase of reliability. Factors allowing to improve their reliability were found by using the repair paper analysis, the questionnaire of the garage employees, and the empirical research of vehicles. The results revealed that the Central Tire Inflation System (CTIS) is the weakest system in off-road vehicles, which in turn requires a deeper investigation. Increasing the reliability of the CTIS makes the vehicle more reliable. Important conclusions were made about the CTIS: sealing elements are not affected by air pressure, but changing their sides may cause breakdown, the clearance of air directly affects reliability, the system can break down even when it is not used in the vehicle. Recommendations for the increase of reliability of pre-existing vehicles are as follows: not to change the side of the sealing element when repairing, the cleanliness and dryness of the air in the CTIS must be ensured by changing the air dehumidifier once a year and releasing water from the air drain valves; also, special training and instructions relating to the CTIS should be provided for garage employees.

Keyword(s): reliability, off-road vehicle, limiting factors


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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

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