Design of Hydraulic Pressure Control System of P2 Hybrid Electric Vehicles
In response to the low energy utilization efficiency and high power transmission loss of hybrid electric vehicles,the hy-draulic control system of hybrid electric vehicles was studied.A fluid dynamics analysis was conducted on the clutch dynamics,safety valve status,and hydraulic control system.The hydraulic control system of P2 hybrid electric vehicles was designed and studied by u-sing the working condition analysis and parametric design.The unique feature of this design was that it changed the switching mode of different working modes of the vehicle.After experimental testing,when the hydraulic control system pressure was set to 3 Mpa,the lubrication valve diameter was 14 mm,the balance spring stiffness was 45 N/mm,and the throttle leakage diameter was 1.2 mm,the pressure of the safety valve could stabilize at 16 bar after fully opened,and the control system utilized the clutch to achieve the switc-hing of the working mode,effectively improving the energy utilization efficiency of the car and reducing loss during power transmis-sion.The designed hydraulic control system improves the driving experience of new energy vehicles,and achieves energy conservation and emission reduction.
automobileshybrid powerhydraulic control systemclutchsafety valve
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