Abstract
The shift strategy of automatic transmission plays a vital role in the smoothness and economy of heavy-duty mining trucks. In this paper, an engine fuel consumption model, a 6 + 2 speed automatic transmission model, and a vehicle resistance model are built in MATLAB. Combined with the development of smart mining technology, the traditional two-parameter economic shift strategy is corrected based on vehicle load and road slope. The dynamic programming optimization algorithm is used to extract the best economical shift strategy under known working conditions to reduce the fuel consumption and the number of shifts. Finally, simulation experiments of the optimized shift strategy by dynamic programming in a typical mine work cycle are carried out. The simulation results show that the engine speed and output torque are maintained in a relatively stable and efficient working range by using the proposed shift strategy. Compared with the traditional two-parameter shift strategy, dynamic programming has advantages in reducing fuel consumption and shift numbers.
Highlights
This paper proposes a and modified shiftinstrategy based on the vehicle loadthe and road twoparameter shift strategy [20,21]
This paper proposes a modified shift strategy based on the vehicle load and road heavy-duty mining
The powertrain system model for a heavy-duty mining truck equipped with automatic transmission is built in MATLAB
Summary
Different from passenger cars, heavy-duty mining trucks have to face problems such as poor driving conditions, huge load capacity, and high fuel consumption [1,2]. The optimal control of the predictive shift strategy currently studied is based on As the deterministicfor dynamic programming algorithmthe is complex and difficult to apply the road cycle conditions passenger vehicle. The mining onlythan travels the mining source and the mining with the development of smart mining technology, it is possible to use a global optimizaplant, which means it has a single driving route, so its road parameters and vehicle tion control algorithm to get best shift based on vehicle throttle openparameters are the relatively fixedstrategy and easier to collect than forspeed, a passenger vehicle. Uses dynamic of programming (DP) system to solve is the global out optimal shift schedule of Economical shift strategy based on the vehicle load and road slope modification and the heavy-duty mining trucks.
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