Multi-mode switching control method of hydraulic hub hybrid vehicle

Abstract

The invention discloses a multi-mode switching control method of a hydraulic hub hybrid vehicle, and belongs to the field of hybrid vehicle control. The multi-mode switching control method includes the steps that working modes are divided; travelling working condition characteristics are abstracted; a preliminary mapping relationship between the working condition characteristics and working condition modes is established; and the optimal control mode is refined. As for the multi-mode switching control method, based on vehicle travelling working condition identification and critical state estimation, by combining with a system global optimal algorithm, and through optimal rule extraction and an energy accumulator SOC optimal using path planning algorithm, the optimal control rule is obtained. According to the multi-mode switching control method of the hydraulic hub hybrid vehicle, the comprehensive influence of the vehicle state and the hydraulic system state is considered, a whole vehicle controller arbitrates independently, and thus the optimum working mode under the current working condition is determined, the multi-mode switching control method aims to plan a using path of an energy accumulator SOC in the full working condition range, thus a system achieves the high average comprehensive transmission efficiency, and thus the adaptability of the hub hydraulic hybrid vehicle to different road surface working conditions and the economical efficiency of the whole vehicle are improved.

Description

technical field [0001] The invention belongs to the field of hybrid vehicle control, and in particular relates to a multi-mode switching control method for a hydraulic hub hybrid vehicle. Background technique [0002] With the development of new energy vehicle technology, hybrid vehicles can achieve good economic and emission characteristics of the vehicle by improving engine efficiency and regenerative braking energy recovery on the premise of meeting the vehicle's power requirements. Therefore, in the context of broad market demand, strict fuel consumption limits and higher overall vehicle performance requirements, the development of high-efficiency commercial vehicle hybrid power systems is an effective way to solve the above problems, and has gradually become the development of my country's commercial vehicle industry. common needs. Among them, the hydraulic hybrid power technology shows strong competitiveness and good application prospects on heavy vehicles due to its a...

AI Technical Summary

Problems solved by technology

However, this method focuses on the smoothness of switching between modes from the perspective of improving vehicle comfort, but does not provide a method for determining the optimal control strategy from the perspective of vehicle economy.

Images