Electric vehicle crawling starting control method and device

A control method and electric vehicle technology, applied in the field of electric vehicles, can solve problems such as creep control instability, achieve the effect of improving stability and safety, and ensuring stability

Pending Publication Date: 2022-01-28
潍柴(扬州)亚星新能源商用车有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the present invention provides a creep start control method and device for an electric vehicle to solve the problem of unstable creep control when the electric vehicle starts

Method used

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  • Electric vehicle crawling starting control method and device
  • Electric vehicle crawling starting control method and device
  • Electric vehicle crawling starting control method and device

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Embodiment Construction

[0078] Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, so they are only examples, and should not be used to limit the protection scope of the present invention.

[0079] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0080] When electric vehicles are running, the biggest difference from internal combustion engine vehicles is the electric drive and control system, in which the electric drive and control system mainly converts the electrical energy provided by the power supply into mechanical energy. Furthermore, by controlling the torque of the drive motor, the state control of the vehi...

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Abstract

The invention belongs to the technical field of electric vehicles, and provides an electric vehicle crawling starting control method and a device. The method comprises the steps that after crawling begins, S1, the required output torque is obtained based on the current torque and a preset vehicle speed-time curve; S2, the actual output torque and acceleration of the vehicle in the time period from the beginning of crawling to the current moment are obtained, and an actual resistance overcoming torque-time curve is determined; S3, according to the actual resistance overcoming torque-time curve, the required output torque for overcoming the predicted resistance is obtained; and S4, according to a preset judgment condition, it is determined that the vehicle executes the required output torque or the required output torque for overcoming the predicted resistance. By adopting the technical scheme in the embodiment of the invention, the uncertainty of unknown resistance can be reduced, and the problem that vehicle speed errors exist after the actual output torque is executed is optimized by obtaining the required output torque for overcoming the predicted resistance and judging whether the required output torque for overcoming the predicted resistance is executed.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and device for controlling creep start of electric vehicles. Background technique [0002] Electric vehicles are powered by vehicle-mounted power supplies and driven by motors to drive wheels, which can solve the problem of exhaust emissions caused by traditional automobile fuel. [0003] In the domestic market, some electric vehicle models of many manufacturers still do not have the function of creep start. After the vehicle is powered on at high voltage, the transmission gear is shifted to the forward / reverse gear, and the vehicle must be stepped on the accelerator after the brake pedal is released. Then you can start walking. At the same time, for some models with creep start function, due to the complex traffic and road environment, the vehicle may face frequent creep starts during driving, and the lack of stable torque control during the creep start proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2063B60L15/2072B60L2240/423Y02T10/72
Inventor 陈宇费晓翔丁建民唐杰陈乐天
Owner 潍柴(扬州)亚星新能源商用车有限公司
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