Prediction of traction properties of wheeled vehicles when driving uphill

Authors: Balkovsky K.S.
Published in issue: #3(56)/2021
DOI: 10.18698/2541-8009-2021-3-681
Category: Mechanical Engineering and Machine Science | Chapter: Machines, Units and Processes
Keywords: transmission, “motor — axle”, differential drive, locked drive, wheeled vehicle, lift angle, free specific tractive force, individual drive, traction properties
Published: 29.03.2021

At present, when designing wheeled transport equipment, drive schemes based on the “motor-axle” principle are widely used. The application of this approach to the organization of the machine’s transmission allows one to obtain a number of significant advantages over classical mechanical schemes, for example, the convenience of the layout and flexibility of the control system, and the possibility of recuperating the kinetic energy of the machine motion during braking in the case of using electric drive. However, the use of a motor-axle transmission on wheeled vehicles complicates the implementation of driving modes with a significant uneven distribution of the load between the axles (for example, when overcoming an uphill), which leads to an increase in the weight and size parameters of the machine drive. The article provides a comparative analysis of several drive schemes for wheeled vehicles from the point of view of upward movement. Considered are such circuit solutions as transmission of the “motor-axle” type, as well as differential and locked transmissions. Comparative analysis consists in assessing the free traction force realized on the drive for various transmission schemes. Comparative tests were carried out for two types of surface: paved road and dirt road. An approach to the analysis of the traction properties of wheeled vehicles when moving uphill is proposed, which makes it possible to evaluate the effectiveness of the use of various transmissions types depending on the thrust-to-weight ratio of the vehicle, as well as the expected operating conditions.

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