THE PECULIARITIES OF MONITORING THE TECHNICAL CONDITION OF A VARIABLE SPEED GEARBOX

Abstract

Nowadays, road transport is used to move various loads in agriculture, in which automatic gearboxes are used. When the vehicles are moving, elements wear out, which leads to changes in parameters of technical condition of vehicles, reduction of efficiency of gear shifting or inability to move the vehicle. The key element in a variable speed gearbox which has a dispatching function is the V-belt variator gear. Existing algorithms do not make it possible to identify the fault in the vehicle at the lowest cost. It is proposed to change the algorithm for diagnosing vehicle gearboxes based on the analysis. As a result of the road tests, measurements of accelerator pedal depressions, changes of vehicle speed and engine crankshaft speed depending on time, changes of throttle opening degree and pressure in the high pressure fuel line were made with a Consult III+ device to identify the malfunctioning condition of the hydraulic unit of the gearbox. The measurement time for each of the indicators did not exceed 30 seconds. The available monitoring system cannot detect a gearbox failure. Detecting a failure when the vehicle is not shifting gears requires the development of an algorithm using a questionnaire part.

Keywords

• vehicle
• diagnosis
• automatic gearbox
• algorithm