Hybrid electric vehicle optimization method for energy normalization minimization based on road grade

A hybrid vehicle, road gradient technology, applied in hybrid vehicles, motor vehicles, road transportation and other directions, can solve problems such as difficulty in applying real-time controllers, failure to consider actual road gradients, and reduced energy optimization performance to achieve efficiency Improve, ensure performance and lifespan, reduce the amount of computation

Active Publication Date: 2019-10-22
SOUTHEAST UNIV
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Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to solve the problem that the existing hybrid vehicle speed planning method either has a large amount of calculation and is only suitable for offline operations, or due to the simplification of the control model, the energy optimization performance will be reduced, or the actual road gradient is not considered, and at the same time These methods are computationally intensive and difficult to apply to problems in real-time controllers

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  • Hybrid electric vehicle optimization method for energy normalization minimization based on road grade
  • Hybrid electric vehicle optimization method for energy normalization minimization based on road grade
  • Hybrid electric vehicle optimization method for energy normalization minimization based on road grade

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with accompanying drawing:

[0050] figure 1 It is a schematic diagram of the system structure of a power-split hybrid electric vehicle, taking this type of hybrid electric vehicle as an example according to figure 2 The flow chart of the present invention is explained in detail.

[0051] The first step is to obtain the initial road information. The road slope information θ is mainly obtained through GIS, and the road speed limit information is mainly obtained through GPS.

[0052] The second step is the initial parameter setting, setting the relevant vehicle parameters, such as the initial vehicle speed v 0 , vehicle-related structural parameters, such as transmission ratio i k , drive train efficiency η t Wait. The initial demand torque T can be obtained according to the initial parameters 需0 ,

[0053]

[0054] The third step is the calculation of the fuel equivalent factor. First, calculat...

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Abstract

The invention provides a hybrid electric vehicle optimization method for energy normalization minimization based on road grade. The method comprises the following steps of initial road information acquisition, initial parameter setting, fuel equivalent factor calculation, fuel equivalent consumption rate calculation, speed conversion factor calculation and energy normalization minimization calculation. The hybrid electric vehicle optimization method for the energy normalization minimization based on the road grade is adopted on the premise that the vehicle dynamics performance is met and the actual condition of the road is considered, the optimization of energy consumption is guaranteed, and meanwhile, the electric quantity balance of a storage battery is guaranteed, so that the performance and the service life of the storage battery are ensured. The method also overcomes a defect that a traditional energy optimization method needs to obtain a future vehicle working condition in advance, and meanwhile, the method has extremely short operation time, so that the method has extremely strong real vehicle application prospect.

Description

technical field [0001] The invention relates to a hybrid electric vehicle optimization method based on normalized energy minimization of road gradient, which only aims at the current vehicle with the same working condition as the known vehicle, and belongs to the technical field of hybrid electric vehicle energy optimization. Background technique [0002] Under the premise that the current mileage of electric vehicles is not ideal, hybrid vehicles are the best choice to ensure vehicle mileage and consider vehicle emissions. Therefore, many researchers devote themselves to the development of hybrid vehicles. The research methods can be roughly divided into two types: (1) Reconfigure the power system of hybrid electric vehicles to improve energy utilization efficiency. For example, the large number of multi-mode hybrid electric vehicles emerging today may be beneficial for high performance and energy efficiency; (2) Optimizing vehicle longitudinal dynamics, i.e. speed spectrum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/14B60W10/06B60W10/08B60W20/15B60W40/076
CPCB60W30/143B60W10/06B60W10/08B60W20/15B60W2510/083B60W2520/10B60W2510/0657B60W2510/0638B60W2510/081B60W2552/15B60W2555/60Y02T10/84Y02T10/62
Inventor 庄伟超李兵兵殷国栋陈浩
Owner SOUTHEAST UNIV
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