Abstract
Electric variable transmission is a new electromechanical energy conversion device structure, which is especially suitable as the driving force distribution device for hybrid electric vehicles. This paper focuses on the power management strategy of hybrid electric vehicles based on an electric variable transmission, and a kind of hierarchical control ideology is proposed. The control strategy is composed of four control levels, namely analysis of force requirement, operation mode switching, force distribution and coordinate control, which are designed respectively in this paper. Then a simulation model is built based on the notion of energetic macroscopic representation, and an experimental test bench is built. The simulation and experiment results demonstrate the feasibility of the proposed strategy, and it can be taken as a new theory and method for the study of hybrid electric vehicle based on electric variable transmission.
Highlights
Focusing on the dynamic control of the hybrid electric vehicles (HEVs) based on Electric variable transmission (EVT) in the process of operation mode switching, the coordinate control strategy enhances the dynamic performance of the vehicle and driving comfort
The vehicle control strategy is composed of four levels, namely analysis of force requirement, operation mode switching, force distribution and coordinate control
This paper analyzes the operation modes of a HEV based on EVT
Summary
EVT is especially suitable as the driving force distribution device for hybrid electric vehicles (HEVs) [3]. The control system of a HEV based on EVT is in the theoretical research stage. The research of this paper mainly focuses on the power management strategy of a EVT-based HEV. The power management strategy research of HEVs based on EVT includes vehicle dynamic properties, fuel economy and driving comfort, and operation. The vehicle control strategy is decomposed into four levels, which are analysis of force requirement, operation mode switching, force distribution and coordinate control, respectively
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