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ZHANG Yanting
WANG Qingfeng
XIAO Qing
FU Qiang
State Key Laboratory of Fluid
Power Transmission and Control,
Zhejiang University,
Hangzhou 310027, China
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CONSTANT WORK-POINT CONTROL FOR
PARALLEL HYBRID SYSTEM WITH CAPACITOR ACCUMULATOR
IN HYDRAULIC EXCAVATOR
Abstract:
Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hybrid construction machinery is established, and experimental study on constant work-point control for parallel hybrid system with capacitor accumulator is carried out using the pressure and flow rate derived from boom cylinder of hydraulic excavator in actual work as the simulating loads. A program of double work-point control is proposed and proved by further experiments.
Key words:
Hybrid Hydraulic excavator Capacitor accumulator Constant work-point control Double work-point control |