Optimal design of a compound hybrid system consisting of torque coupling and energy regeneration for hydraulic hybrid excavator

For hydraulic hybrid excavators (HEEs), two recoverable energy sources for power hybridization are from engine optimization and actuator energy regeneration. This paper presents a hydraulic hybrid system that integrates with these two sources using engine torque coupling and boom energy regeneration, thus to further explore the fuel economy potential of HHE. Their different characteristics are analyzed first to perform specialized system design. Then an optimal control problem is formulated and solved for system sizing. The effectiveness of the proposed system and its energy saving performance will be assessed, as well as the contributions of engine torque coupling and boom ERS, respectively.

[1]  Eric Bideaux,et al.  Optimal sizing of an energy storage system for a hybrid vehicle applied to an off-road application , 2014, 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics.

[2]  Xiao Lin,et al.  Performance analysis of hydraulic excavator powertrain hybridization , 2009 .

[3]  Tao Wang,et al.  Modeling and control of a novel hydraulic system with energy regeneration , 2012, 2012 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM).

[4]  Perry Y. Li,et al.  Fuel economy comparisons of series, parallel and HMT hydraulic hybrid architectures , 2013, 2013 American Control Conference.

[5]  Qingfeng Wang,et al.  Research on the energy regeneration systems for hybrid hydraulic excavators , 2010 .

[6]  Perry Y. Li,et al.  Optimal design of power-split transmissions for hydraulic hybrid passenger vehicles , 2011, Proceedings of the 2011 American Control Conference.

[7]  Zoran Filipi,et al.  Hydraulic Hybrid Propulsion for Heavy Vehicles: Combining the Simulation and Engine-In-the-Loop Techniques to Maximize the Fuel Economy and Emission Benefits , 2010 .

[8]  Monika Ivantysynova,et al.  A Series-Parallel Hydraulic Hybrid Mini-Excavator with Displacement Controlled Actuators , 2013 .

[9]  Cheng Guan,et al.  Research on the design and control strategy for a flow-coupling-based hydraulic hybrid excavator , 2014 .

[10]  Huei Peng,et al.  Modeling and Control of a Power-Split Hybrid Vehicle , 2008, IEEE Transactions on Control Systems Technology.

[11]  Perry Y. Li,et al.  Optimization and Control of a Hydro-Mechanical Transmission based Hybrid Hydraulic Passenger Vehicle , 2010 .