Energy Recovery and Reuse Management for Fuel-electric-hydraulic Hybrid Powertrain of a Construction Vehicle

摘要

Aiming at the frequent start-stop of a straight-manipulator aerial platform vehicle for sandblasting and spray painting hull, a hydraulic energy recovery and reuse unit consisting of accumulator and pump/motor is connected in parallel on the original series hybrid system. The main purpose of the modified hybrid powertrain is to exploit the operational characteristics of the hydraulic pump/motor to recover the kinetic energy during vehicle braking. And while, during the climbing and acceleration process, the stored energy in accumulator is quickly released to meet the intermittent and high power requirements of the system. Firstly, the fuel-electric-hydraulic hybrid power system is presented for an actual aerial platform vehicle. And then a logical control strategy of the energy management is designed according to vehicle driving condition. The simulation comparison result is given between the fuel-electric-hydraulic hybrid system and the original series hybrid system.