Abstract: The powerful shifting strategy considering multiparameters for mining truck was set up based on the weight， working condition and change rate of throttle angle， uphill with overload and downhill with empty load. The full field performance function of diesel engine Cummins QSLFR91674 was established by the superposition method. In addition， the relationship between engine speed and output torque in different throttle angles was shown by this function. Based on the engine dynamic performance， the powerful shifting strategy of vehicle speed， throttle angle and vehicle acceleration was designed for the mining truck named 3550. The strategy was further optimized combining the identification method for road condition， the state of vehicle load， and the driver intentions. The power train system simulation model was established in Maplesim， and simulation results represent that the optimized strategy can precaution unnecessary shift and improve the dynamic performance for vehicle.

Key words: mining truck, powerful shifting strategy, shifting parameters, change rate of throttle angle, automatic transmission