Exploitational research of reliability of the front suspension of „Karosa” buses

Abstract

This paper presents the reliability analysis of front suspension of ,,Karosa” buses for working conditions existing at the PLC ,,Vilniaus autobusai”. The weakest units of the front suspension are being looked for, laws of their fault frequencies and their reasons are being examined and some conclusions and propositions to the fleet of buses about the repair and exploitation conditions are made. The paper presents a brief description of the front suspension of ,,Karosa” buses, statistically processed distribution according to probabilistic distributions of the most frequent unit faults and prognosis of their average working resource. The main reasons of such faults are also presented. Also there was established that working conditions of front suspension of ,,Karosa” buses are hard and therefore its reliability is rather low. The average resource of some units of the suspension equals to 31- 34 thousand kilometres only. The structure of the independent suspension of this type is complicated and a continuous maintenance is necessary. It is proposed to Vilnius fleet of buses to organize a technical service of ,,Karosa” buses every 30- 35 thousand kilometres.