Acceleration control method of electric automobile

A technology of acceleration control and electric vehicles, which is applied in the direction of electric vehicles, control drives, control devices, etc., can solve the problems of not fully considering the driving environment of electric vehicles, single judgment basis, and optimization of acceleration limits without speed ranges, etc., to ensure ride comfort Performance and driving safety, superior overall performance, and the effect of improving safety and economy

Active Publication Date: 2020-05-12
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Although this technical method can effectively prevent the electric vehicle from overspeeding, it only uses a single vehicle speed and acceleration value as the basis for judgment in the control process, without fully considering the driving environment of the electric vehicle, and does not fully evaluate the acceleration of each speed segment during the driving process. Perform constrained optimization

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  • Acceleration control method of electric automobile
  • Acceleration control method of electric automobile

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described below with reference to the accompanying drawings. In order to provide a comprehensive understanding of the present invention, many details are described below, but it will be apparent to those skilled in the art that the present invention can be practiced without these details.

[0022] A method for controlling acceleration of an electric vehicle, comprising the steps of:

[0023] Step 1: Select the vehicle to enter the power mode or the economic mode according to the accelerator opening A, the current vehicle speed V and the current acceleration a during the driving of the vehicle. Among them, the power mode is mainly used for driving on steep roads, and the economic mode is mainly used for driving on level roads and low-slope roads.

[0024] Step 1.1: Combined with the actual test and debugging results of the vehicle, optimize the setting period of the vehicle to 3s, the setting threshold of the acceler...

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Abstract

The invention discloses an acceleration control method of an electric vehicle, and relates to the technical field of new energy vehicles, and the acceleration control method comprises the following steps: S1, the vehicle is selected to enter a power mode or an economic mode according to the accelerator opening A, the current vehicle speed V and the current acceleration a in the driving process ofthe vehicle; s2, the acceleration is not limited when the power mode is entered; and S3, when the vehicle enters the economic mode, the full-speed range of the vehicle is divided into a plurality of vehicle speed intervals, acceleration limit values are set in the vehicle speed intervals, and the output torque of a motor is controlled according to the acceleration limit value in the vehicle speedinterval where the current vehicle speed V is located so as to realize segmental limitation of the acceleration. When the vehicle enters the economic mode, the full-speed range is segmented, and the acceleration limit value of each segment is set, so that the acceleration of the vehicle is gentler, the overall performance is more excellent, the riding comfort of people is fully guaranteed, and thesafety and economy of the vehicle are effectively improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an acceleration control method for electric vehicles. Background technique [0002] With the rapid development of new energy vehicles, people have higher requirements for the ride comfort of electric vehicles. Because of the characteristics of the drive motor, electric vehicles have better acceleration performance at the start and low-speed stages, but each driver's driving style is different. If there is a large acceleration during the driving of an electric vehicle, it will make the driver and passengers feel uncomfortable. , and there is a greater security risk. Therefore, limiting the acceleration of the electric vehicle during driving can effectively improve the stability and safety of the electric vehicle, thereby effectively improving people's riding comfort. [0003] The Chinese patent with application number CN106740271A discloses a method and device for li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/12B60L2240/14B60L2240/423B60L2260/26Y02T10/72
Inventor 林陈立龚刚林思学王铃燕方媛林杰锋
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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