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Networked hybrid electric vehicle efficient energy management method considering road gradient

A hybrid vehicle and energy management technology, applied in hybrid vehicles, motor vehicles, road transportation, etc., and can solve problems such as predicting vehicle speed

Active Publication Date: 2021-04-30
XIAN UNIV OF TECH
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Problems solved by technology

In the existing research, the vehicle speed has not been predicted through V2V communication information, and it has been applied to the MPC energy management of parallel HEVs

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  • Networked hybrid electric vehicle efficient energy management method considering road gradient
  • Networked hybrid electric vehicle efficient energy management method considering road gradient
  • Networked hybrid electric vehicle efficient energy management method considering road gradient

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Embodiment Construction

[0101] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0102] The invention relates to the research technical field of an efficient energy management method for a network-connected hybrid electric vehicle considering road gradient. It mainly involves three aspects: modeling of parallel hybrid electric vehicles, speed prediction of connected hybrid electric vehicles, and ECMS-based MPC energy management strategy. The main content in the modeling of parallel hybrid electric vehicles is: calculate the fuel consumption rate and engine torque by establishing the engine model, establish the motor efficiency model according to the relationship between the motor speed and torque, and establish the battery model according to the battery internal resistance model. The transmission model calculates the transmission torque and speed, and builds the vehicle dynamics model considering the road gradient. The ma...

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Abstract

The invention discloses a networked hybrid electric vehicle efficient energy management method considering road gradient. The method comprises the steps of modeling a parallel hybrid electric vehicle; predicting the speed of the networked hybrid electric vehicle; and carrying out an MPC energy management strategy based on ECMS. The influence of road gradient on energy management is considered, a time domain optimization problem is converted into a space domain problem, and a foundation is laid for designing the MPC energy management strategy based on ECMS; the influence of vehicle speed change on energy management optimization is considered, V2V communication information is fused, the vehicle speed is predicted within a prediction distance by a chain neural network, and the vehicle speed is applied to the ECMS-based MPC energy management strategy; the calculation efficiency and adaptability are improved, a gear shifting penalty factor is added into a target function, frequent gear shifting is avoided, and the driving performance is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to an efficient energy management method for a network-connected hybrid electric vehicle considering road slopes. Background technique [0002] The energy management of hybrid electric vehicles (HEV) is usually defined as a power / torque distribution problem, so as to determine how much power / torque each power source needs to provide to meet the driver's safe driving needs. The energy management strategy (EMS) directly determines the economy and power of the vehicle. In search of optimal power allocation, researchers have proposed many methods to optimize energy management. [0003] Dynamic programming (DP) is a globally optimal control method, which cannot be directly applied in practice because it needs to know the entire driving cycle / trip (speed, road gradient, etc.). At the same time, its calculation efficiency is low, especially when calculating multip...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/11
CPCB60W20/11Y02T10/84
Inventor 张风奇胡晓松肖乐华崔亚辉庞辉
Owner XIAN UNIV OF TECH
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