Parallel hybrid electric vehicle energy management method with gearbox gear control

A technology for hybrid electric vehicles and gearbox gears, applied in hybrid electric vehicles, motor vehicles, transportation and packaging, etc.

Inactive Publication Date: 2019-02-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems existing in the existing hybrid electric vehicles, the present invention proposes an energy management meth...

Method used

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  • Parallel hybrid electric vehicle energy management method with gearbox gear control
  • Parallel hybrid electric vehicle energy management method with gearbox gear control
  • Parallel hybrid electric vehicle energy management method with gearbox gear control

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Embodiment Construction

[0063] like figure 1 , figure 2 As shown, a kind of energy management method of band parallel hybrid electric vehicle of the present invention specifically comprises the following steps:

[0064] (1) Analyze the structure of the parallel hybrid electric vehicle. In this structure, the motor 3 is coupled with the output shaft of the engine 1 through gears, which can realize the decoupling of the torque of the engine 1 and the torque of the motor 3. The gearbox 5 is located in the engine 1 and motor 3 rear, its layout is simple, this energy management strategy can not only realize the optimal distribution of engine 1 torque and motor 3 torque, but also integrates the control of the 5th gear of the gearbox.

[0065] (2) The required torque of the vehicle can be obtained by introducing PI dynamic adjustment on the basis of the vehicle running resistance equation:

[0066] T req =(mgfcosα+0.5ρC d Av ref 2 +mgsinα+ma ref )R+K p (v ref -v act )+K i ∫(v ref -v act )dt

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Abstract

The invention discloses a parallel hybrid electric vehicle energy management method with gearbox gear control, and relates to the field of hybrid electric vehicle energy management. The parallel hybrid electric vehicle energy management method analyzes an evolution law of a state of charge change rate of a battery and engine specific fuel consumption under each gear, combines with a hybrid logic dynamic modeling method, establishes a parallel hybrid electric vehicle energy management system model including gearbox discrete gear information, further introduces a model predictive control idea, defines motor torque as a continuous control variable, and defines gearbox gears as discrete control variables and translates an optimization problem into a mixed integer quadratic programming problemto solve, the strategy optimizes the torque distribution of each power source and decides an optimal gearbox gear. The parallel hybrid electric vehicle energy management method aims at the energy management problem of a parallel hybrid electric vehicle with a gearbox, and has the advantages of high pertinence, high practicability, good optimization effect, high integration and the like.

Description

technical field [0001] The invention relates to the field of energy management of a parallel hybrid electric vehicle, in particular to an energy management method with gearbox gear control. Background technique [0002] Due to its simple structure and superior fuel economy, parallel hybrid electric vehicles have been increasingly used in mass-produced vehicles. Designing a more efficient and integrated energy management strategy to further reduce fuel consumption is the key to its wider promotion. [0003] Parallel hybrid electric vehicle has a simple structure and is easy to transform from traditional fuel vehicles, so it can greatly reduce research and development costs. Its power system mainly includes power components such as engine, motor, battery and gearbox. Generally, the abundant gears of the gearbox can increase the probability of the vehicle running in the high load rate area, which is beneficial to improve fuel economy. However, in the hybrid system, the system u...

Claims

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Application Information

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IPC IPC(8): B60W20/11B60W20/30B60W10/06B60W10/08B60W10/11
CPCB60W10/06B60W10/08B60W10/11B60W20/11B60W20/30B60W2710/0644B60W2710/081B60W2710/1005Y02T10/62
Inventor 汪少华张晟孙晓强施德华余铖铨张弛惠易佳
Owner JIANGSU UNIV
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