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Range extender starting control method, range extender and electric vehicle

An engine controller and range extender technology, applied in electric vehicles, motor vehicles, hybrid vehicles, etc., can solve the problems of difficulty in ensuring the starting stability of the range extender, large changes in engine speed, poor starting control effect, etc. The effect of saving layout space, smooth starting and improving noise

Inactive Publication Date: 2018-10-02
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the range extender system, the generator plays the role of the starter. During the starting process of the range extender, the generator is usually given a fixed drag torque to drive the engine to achieve the start of the range extender. This kind of starting control effect is poor, the engine speed changes greatly, it is easy to cause large vibration and noise, and it is difficult to ensure the stability of the range extender starting, resulting in poor experience for users in the process of using electric vehicles

Method used

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  • Range extender starting control method, range extender and electric vehicle
  • Range extender starting control method, range extender and electric vehicle
  • Range extender starting control method, range extender and electric vehicle

Examples

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no. 1 example

[0031] Please refer to figure 1 , is a structural block diagram of the range extender 100 provided by the first embodiment of the present invention. Such as figure 1 As shown, the range extender 100 includes a range extender controller 110, a generator 120 and an engine 130, the range extender controller 110 is electrically connected to the generator 120 and the engine 130, and the generator 120 connected to the engine 130.

[0032] In this embodiment, the generator 120 and the engine 130 are coaxially mechanically connected. During the starting process of the range extender 100, the generator 120 drives the engine 130 to rotate to realize the starting of the engine 130, while the range extender 100 During the power generation process, the generator 120 gives the engine 130 a reverse negative torque, the engine 130 drives the generator 120 to rotate together, and the generator 120 generates power.

[0033] The range extender controller 110 is used to control the generator 1...

no. 2 example

[0040] Please refer to figure 2 , is a structural block diagram of the electric vehicle 10 provided by the second embodiment of the present invention. Such as figure 2 As shown, the electric vehicle 10 includes a fuel supply system 200, a power battery 300 and the range extender 100 provided in the first embodiment. In this embodiment, the fuel supply system 200 is used to provide fuel for the engine 130 after the range extender 100 is started, the generator 120 has two working modes of starting and generating, and the power battery 300 It is used to provide energy for the generator 120 when the range extender 100 is started, so that the generator 120 drives the engine 130 to rotate, thereby realizing the smooth start of the range extender 100 and bringing a good sense of experience to the user; When the range extender 100 is started, the engine 130 drives the generator 120 to rotate, and the generator 120 acts as a load to generate electricity, and the electric energy gen...

no. 3 example

[0043] Please refer to image 3 , is a schematic flow chart of the method for controlling start-up of the range extender provided by the third embodiment of the present invention. It should be noted that the range extender startup control method described in the embodiment of the present invention does not image 3 And the specific sequence described below is limited, and its basic principles and technical effects are the same as those of the first embodiment. For brief description, for the parts not mentioned in this embodiment, you can refer to the corresponding content in the first embodiment. It should be understood that in other embodiments, the order of some steps in the range extender starting control method according to the present invention can be exchanged according to actual needs, or some steps can also be omitted or deleted. The start-up control method of the range extender described in the embodiment of the present invention can be applied to the above-mentioned...

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Abstract

The invention discloses a range extender starting control method, a range extender and an electric vehicle and relates to the technical field of electric vehicles. After controlling a power generatorto pull an engine to rotate at a pulling torque, a range extender controller adjusts the pulling torque of the power generator according to an engine rotation speed obtained in real time till the engine is started. In the range extender starting process, the torque of the power generator is controlled on the basis of the range extender controller, different pulling torques are given for differentengine rotation speeds so that the pulling torque of the power generator to the engine is reduced with the increasing of the engine rotation speed to realize smooth starting of the engine; and therefore, shaking and noises caused by large rotation speed change in the starting process are avoided, the NVH performance of the electric vehicle is improved, and the prolonging of the service life of theengine is significant.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for controlling the start of a range extender, a range extender and an electric vehicle. Background technique [0002] Energy and environmental issues are important factors restricting the sustainable development of human society and economy. In the field of transportation, electric vehicles have the advantages of zero emission and no pollution, but the driving range and charging factors of batteries greatly limit the large-scale market of electric vehicles. promote. The electric vehicle range extender is an auxiliary power unit composed of an engine, a generator and a rectifier. When the battery is fully charged, the car runs in pure electric mode; when the battery is insufficient, the range extender starts to work to charge the battery or Directly drives the electric motor, thereby greatly increasing the driving range of electric vehicles. [0003] As every...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/12B60L50/15
CPCB60L50/61Y02T10/62Y02T10/70Y02T10/7072
Inventor 尤霖韦健林胡红星孙昊
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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