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Method and device for evaluating fuel consumption of hybrid electric vehicle

A hybrid vehicle and fuel consumption technology, applied in hybrid vehicles, motor vehicles, control devices, etc., can solve problems such as the inability to accurately and reliably reflect the relationship curve, and the inability to perform evaluation, saving computer simulation time, and improving Ease of use and practicality, cost reduction effect

Active Publication Date: 2015-05-06
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the existing technology is that the initial SOC value of the energy storage system needs to be changed repeatedly, and the repeated initial SOC value cannot accurately and reliably reflect the relationship between ΔSOC and Δm. are equal, and thus cannot be evaluated

Method used

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  • Method and device for evaluating fuel consumption of hybrid electric vehicle
  • Method and device for evaluating fuel consumption of hybrid electric vehicle
  • Method and device for evaluating fuel consumption of hybrid electric vehicle

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Embodiment 1

[0024] figure 1 The composition structure of the hybrid electric vehicle provided by Embodiment 1 of the present invention is shown, and for the convenience of description, only the parts related to this embodiment are shown. It should be noted, figure 1 The composition structure is only used as an example to explain the present invention, and is not used to limit the protection scope of the present invention.

[0025] Such as figure 1 As shown, the hybrid vehicle is a fuel cell hybrid vehicle, and the fuel cell hybrid vehicle includes a fuel cell system, a DCDC converter, a DCAC converter, a motor, a battery (ie, an energy storage system) and a vehicle body.

[0026] The power source of the fuel cell hybrid electric vehicle is a fuel cell system and a battery. Since the voltage value of the fuel cell system is not equal to the bus voltage value U bus , so a DC (Direct Current-Direct Current, DCDC) converter is needed to adjust its output. In the composition structure of ...

Embodiment 2

[0032] image 3 It shows the implementation process of the method for evaluating the fuel consumption of hybrid electric vehicles provided by the second embodiment of the present invention, and the method can be applied to figure 2 For the hybrid electric vehicle energy management system shown, the process of the method is described in detail as follows:

[0033] In step S301, an energy management strategy based on Pontryagin's minimum principle is applied to a computer model of a hybrid electric vehicle, and multiple sets of computer simulation result data are obtained by adjusting control parameters.

[0034]Specifically, the energy management strategy based on Pontryagin's minimum principle is applied to the computer model of the hybrid electric vehicle, and when the initial SOC value of the energy storage system remains unchanged, by adjusting the initial value of the control parameter, Obtain the computer simulation result data of multiple groups of energy storage syste...

Embodiment 3

[0050] Figure 5 It shows the composition and structure of the device for evaluating the fuel consumption of a hybrid electric vehicle provided by Embodiment 3 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.

[0051] The device for evaluating fuel consumption of hybrid electric vehicles includes:

[0052] The parameter adjustment unit 51 is used to apply the energy management strategy based on Pontryagin's minimum value principle to the computer model of the hybrid electric vehicle, and obtain multiple sets of computer simulation result data by adjusting the control parameters;

[0053] A curve acquisition unit 52, configured to acquire an equivalent fuel consumption curve according to the multiple sets of computer simulation result data;

[0054] The fuel consumption acquisition unit 53 is configured to acquire the fuel consumption considering the difference between the final SOC value...

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Abstract

The invention provides a method and device for evaluating the fuel consumption of a hybrid electric vehicle. The method and device are applicable to the technical field of hybrid electric vehicles. The method includes the steps that an energy management strategy based on a Pontryagin minimum principle is applied to a computer model of the hybrid electric vehicle, and a plurality of sets of computer simulation result data are obtained by adjusting control parameters; an equivalence fuel consumption curve is obtained according to the multiple sets of computer simulation result data; the fuel consumption giving consideration to a difference between a final SOC value and an initial SOC value in an energy storage system is obtained according to the equivalence fuel consumption curve. By means of the method and device, the problems that in the prior art, when the fuel consumption of the hybrid electric vehicle under the condition that the final SOC value of the energy storage system is unequal to the initial SOC value of the energy storage system is evaluated, the wasted time is longer, and the effective evaluation basis cannot be obtained even though the initial SOC value is repeatedly converted are solved.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and in particular relates to a method and a device for evaluating fuel consumption of a hybrid electric vehicle. Background technique [0002] Fuel consumption is a very important indicator for hybrid vehicles. When the HEV ends the drive, ideally the energy storage system (such as the battery) has a state of charge (SOC) value equal to the SOC value at the start of the drive. This situation can be regarded as the energy consumption of the energy storage system is zero during the whole driving process of the vehicle, therefore, the fuel consumption of the hybrid electric vehicle can be evaluated objectively and accurately. However, during the actual driving process of the vehicle, the SOC value of the energy storage system changes according to the energy management strategy of the hybrid electric vehicle. It is difficult to happen that the SOC value of the energy storage system ...

Claims

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Application Information

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IPC IPC(8): B60W40/00B60W20/00G06F17/15G06F17/50
CPCB60W2520/10B60W2540/10B60W2710/06
Inventor 郑春花徐国卿潘仲鸣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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