Optimization of Resource Consumption When using Vehicle Transmissions at Low Temperatures

Abstract

This research details the approach to justify optimum thermal conditions for a vehicle transmission unit. This approach is based on the integrated criterion which comprises aggregated energy expenditures to warm up a transmission reduction gear and to overcome forces of mechanical and hydraulic friction inside its components. Thermal working conditions of a unit shall be considered optimum when energy expenditures are the lowest. Justification and development of technologies to provide optimum thermal conditions of a unit shall be based on comparison of optimum temperature values and temperature values of transmission oil stabilization. If optimum temperature exceeds stabilization temperature, then additional heat sources shall be used if it is lower then heat shall be transferred to other units. Analysis of optimum thermal conditions of the KAMAZ transmission shows that the transmission unit has an excessive thermal potential. Optimum temperature exceeds stabilization temperature by 5 K, so, excessive thermal energy must be transferred.