Mode-metering the loading of the electromechanical transmission of electric bus LiAZ-6274 when driving along the routes in Moscow using a telematics service

Introduction (problem statement and relevance). Today, electric buses are used as one of the main transport means on the routes of Moscow. It has been found that operation of electric buses significantly differs from operation of conventional buses equipped with an internal combustion engine. In this regard the need to define the initial data in terms of the electric bus speed on the route, power supplied and torque distribution per unit of time on the transmission shafts determining operational loading modes of the electromechanical transmission gear, remains a pressing issue. Thus, it is necessary to perform a comprehensive mode-metering of the transmission as the examined vehicle drives the city routes.

The purpose of the study is to form initial data for determination of the load mode parameters of the transmission being developed or examined.

Methodology and research methods. The proposed method of forming the initial data consists in reading the information coming to the electronic unit of wireless message transmission via the Controller Area Network protocol (CAN messages) along with the functions of collecting telematics information with further processing to represent it in the form of graphs of distribution of torque and speed over time.

Scientific novelty and results. The mode-metering of loading of an electromechanical transmission of urban wheeled electric transport when driving on the route, using the Controller Area Network bus embedded in the vehicle, allowed obtaining a set of data on distribution of vehicle speed and torque occurring in the transmission over time.

Practical significance. The developed method of mode-metering of electromechanical transmissions of urban wheeled electric transport can be applied in analysis of transmission durability on various electric bus routes in Moscow while excluding creation of expensive specialized measuring complexes.

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