Abstract
Due to the different working conditions and specification requirements of mining trucks when compared to commercial passenger vehicles, better fuel efficiency of mining trucks could lead to more significant economic benefits. Therefore, investigating a hybrid transmission system becomes essential. A coaxial power-split hybrid powertrain system for mining trucks is presented in this paper. The system is characterized as comprising an engine, a generator (MG1), a motor (MC2), two sets of planetary gears, and a clutch (CL1). There are six primary operation modes for the hybrid system including the electric motor mode, the engine mode, the hybrid electric mode, the hybrid and assist mode, the regenerative mode, and the stationary charging mode. The mathematical model of the coaxial power-split hybrid system is established according to the requirements of vehicle dynamic performance and fuel economy performance in a given driving cycle. A hybrid vehicle model based on a rule-based control strategy is established to evaluate the fuel economy. Compared with the Toyota Hybrid System (THS) and the conventional mechanical vehicle system using a diesel engine, the simulation results based on an enterprise project indicate that the proposed hybrid system can enhance the vehicle’s fuel economy by 8.21% and 22.45%, respectively, during the given mining driving cycle. The simulation results can be used as a reference to study the feasibility of the proposed coaxial hybrid system whose full potential needs to be further investigated by adopting non-causal control strategies.
Highlights
Mining trucks are widely used as the primary transportation for mining and water conservancy projects
A coaxial power-split hybrid system is proposed for a mining truck to meet the dynamic
A coaxial power-split hybrid system is proposed for a mining truck to meet the dynamic characteristics and economy efficiency according to the given driving cycle in this paper
Summary
Mining trucks are widely used as the primary transportation for mining and water conservancy projects. Since mining workbeatdriven low speed and long which downhill conditions, in this paper, a novel low-speed, the trucks vehicleoften can only by the motor, requires large motor torque and coaxial power-split for mining is proposed enhance the fuel economy. Miningonly trucks often workisatused, low speed and long downhill conditions, in directly this paper, novel proposedSince structure, one clutch so the engine can drive the truck inahigh-speed coaxial power-split hybrid system for mining trucks is proposed to enhance the fuel economy. The engine, generator, and motor proposed structure, only one clutch is used, so the engine can drive the truck directly in high-speed arranged on the same side to reduce the axial size.
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