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An efficient energy management method for connected hybrid electric vehicles considering road gradient

A technology for hybrid electric vehicles and energy management, applied in the fields of hybrid electric vehicles, motor vehicles, road transport emission reduction, etc., can solve problems such as predicting vehicle speed, optimize shifting decisions, avoid frequent shifting, and improve working condition adaptability Effect

Active Publication Date: 2022-08-02
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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  • An efficient energy management method for connected hybrid electric vehicles considering road gradient
  • An efficient energy management method for connected hybrid electric vehicles considering road gradient
  • An efficient energy management method for connected hybrid electric vehicles considering road gradient

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Embodiment Construction

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

[0102] The invention relates to the research technical field of an efficient energy management method for a networked hybrid electric vehicle considering road gradients. It mainly involves the modeling of parallel hybrid electric vehicles, the speed prediction of connected hybrid electric vehicles, and the MPC energy management strategy based on ECMS. The main contents in the modeling of parallel hybrid electric vehicles are: calculating the fuel consumption rate and engine torque by establishing an engine model, establishing a motor efficiency model according to the relationship between the motor speed and torque, establishing a battery model according to the battery internal resistance model, and establishing a The transmission model calculates transmission torque and rotational speed, and models the vehicle dynamics taking into account the ro...

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Abstract

An efficient energy management method for connected hybrid electric vehicles considering road gradient, comprising the following steps: modeling of parallel hybrid electric vehicles; speed prediction of connected hybrid electric vehicles; MPC energy management strategy based on ECMS; The influence of energy management changes the optimization problem in the time domain into a problem in the space domain, which lays a foundation for designing the MPC energy management strategy based on ECMS; considering the influence of vehicle speed changes on the energy management optimization, the fusion of V2V communication information is performed by a chain neural network. The vehicle speed within the predicted distance is predicted, and it is applied to the MPC energy management strategy based on ECMS; the calculation efficiency and adaptability are improved, and the shift penalty factor is added to the objective function, which avoids frequent shifting and improves driving. performance.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a high-efficiency energy management method for a network-connected hybrid electric vehicle considering road gradients. Background technique [0002] Hybrid electric vehicle (HEV) energy management is generally defined as a power / torque distribution problem 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. To seek optimal power distribution, researchers have proposed many methods to optimize energy management. [0003] Dynamic programming (DP) is a globally optimal control method that cannot be directly applied in practice since it requires knowledge of the entire driving cycle / trip (speed, road gradient, etc.). At the same time, its computational efficiency is low, especially when it is more complicat...

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Application Information

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Patent Type & Authority Patents(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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