Power Parametric Optimization of an Electro-Hydraulic Integrated Drive System for Power-Carrying Vehicles Based on the Taguchi Method

Abstract

Focused on the troubles and defects introduced by the traditional single form of electric vehicle transmission, this paper proposes an electro-hydraulic power coupled electric vehicle based on the working principle of an electro-hydraulic power integrated drive system for light-duty cargo vehicles. The integration of the planetary row into the drive system allows the interconversion of mechanical, electrical, and hydraulic energy. By describing the system structure and composition, several working conditions during automobile driving are proposed, and the working principle of every circumstance is introduced. Simultaneously, the article determines the preliminary optimal ratio with the battery’s state of charge (SOC) as the constraint. Then, the orthogonal test matrix of electro-hydraulic ratios and speed thresholds for each operating condition is established according to Taguchi’s method. The impact of each optimized parameter on the motor torque and hydraulic torque as well as the SOC and the proportion of the effect is evaluated by the simulation to obtain the optimal solution. The simulation consequences show that the motor torque and hydraulic torque are reduced, and thus, the vehicle’s acceleration performance and energy recovery efficiency are improved.

Energy Storage Charging Pile Management Based on Internet of Things Technology for Electric Vehicles

“…Figure 3 shows the system structure diagram. The new energy storage charging pile system for EV is mainly composed of two parts: a power regulation system [43] and a In this paper, a high-performance energy storage battery is added on the basis of the traditional charging pile. Based on this, a new design scheme of the energy storage charging pile system is proposed [40][41][42].…”

“…Figure 3 shows the system structure diagram. The new energy storage charging pile system for EV is mainly composed of two parts: a power regulation system [43] and a charge and discharge control system. The power regulation system is the energy transmission link between the power grid, the energy storage battery pack, and the battery pack of the EV.…”

Investigation on the external characteristics of permanent magnet synchronous mechatronic-electro-hydraulic coupler

“…The simulation results show that in the Economic Commission for Europe (ECE) and the Extra Urban Driving Cycle (EUDC), the MSEH-HEV has a 15% reduction in battery consumption, and the motor peak torque is significantly reduced. Chen et al 22 proposed a hybrid electric-hydraulic vehicle and several operating conditions during the vehicle's motion. Using the state of charge (SOC) of the battery as a constraint, orthogonal experimental matrices for the electric-hydraulic ratio and speed thresholds under various operating conditions were established based on the Taguchi method.…”

Energy Management Strategy Optimization for a Novel Electric‐hydraulic Power Coupling Vehicle Considering the Influence of Multiple Driving Cycles

“…The optimization results showed that the economy of the electromechanical–hydraulic power coupled electric vehicle is improved under the optimal electric–hydraulic ratio. [ 36 ] Another point worth noting is that the genetic algorithm (GA) is a heuristic algorithm with good optimization performance. [ 37 ] It can easily select a satisfactory solution based on optimization objectives.…”