TITLE:
Modeling and Simulation of Power Coupling System in Hydraulic Hybrid City Bus
AUTHORS:
Xunming Li, Jinyu Qu, Wei Wei, Xiangyu Tian
KEYWORDS:
HHB; Power Coupling System, Planetary Gear Trans, Hydraulic Starting
JOURNAL NAME:
Energy and Power Engineering,
Vol.6 No.6,
June
25,
2014
ABSTRACT: In order to solve
the coupling problem of power in Hydraulic Hybrid City Bus (HHB), a hydraulic hybrid
power coupling system based on planetary gear transmission principle is
proposed in this paper. The system consists of diesel engine, power coupler,
hydraulic pump/motor, etc. The realizable operating modes of power coupling
system are analyzed in this paper. Under coordination of clutches, the engine driven mode, hydraulic driven mode, hybrid
driven mode, hydraulic engine-start mode and braking energy recovery
mode are realizable. Based on Lagrange equation, kinetic analysis and kinematics
analyses are presented. In addition, the simulation model of the power coupling
system is proposed, which includes diesel engine model, power coupler model,
hydraulic pump/motor model, etc. The example simulation analysis is proposed
under the hybrid driven mode; the results show that the power coupling system
proposed in this paper can realize power coupling of hydraulic hybrid city bus.
Compared with traditional city bus, the hydraulic hybrid city bus can choose small-displacement
engine so as to improve fuel economy and dynamic property.