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Creep control method and system for electric automobile

A technology of electric vehicle and control method, which is applied in the direction of electric vehicle, control drive, control device, etc., can solve the problem of inability to adjust the target speed of creeping

Active Publication Date: 2019-04-12
智车优行科技(上海)有限公司
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to propose a creep control method and device for an electric vehicle to solve the problem that the driver cannot adjust the creep target vehicle speed in the prior art

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  • Creep control method and system for electric automobile

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Embodiment Construction

[0051] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0052] figure 1 A flow chart showing a creep control method for an electric vehicle according to an exemplary embodiment of the present invention, such as figure 1 As shown, an embodiment of the present invention provides a creep control method for an electric vehicle, including:

[0053] Step 1: Collect the motor speed, and calculate the current vehicle speed according to the motor speed;

[0054] Step 2: Judge the creep mode according to the current vehicle speed;

[0055]Step 3:...

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Abstract

A creep control method and system for an electric automobile are disclosed. The control method includes the following steps: collecting a rotating speed of a motor and the opening degree of a brake pedal, and calculating a current vehicle speed according to the rotating speed of the motor; judging a creep mode according to the current vehicle speed; calculating a target vehicle speed according tothe creep mode and the opening degree of the brake pedal; and based on the target vehicle speed and the current vehicle speed, calculating target motor torque by feedback control, and controlling output of the motor torque according to the target motor torque until the current vehicle speed reaches the target vehicle speed. The control method judges the creep mode according to the current vehiclespeed, and calculates the target vehicle speed according to the creep mode and the opening degree of the brake pedal, so that the target vehicle speed is associated with the current vehicle speed of the electric automobile and the opening degree of the brake pedal controlled by a driver, and so, the driver can control the target vehicle speed of creeping driving, and the problem that existing control methods cannot reach the target vehicle speed required by the driver is solved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a creep control method and system for electric vehicles. Background technique [0002] In some usage scenarios, including driving on a congested road, parking in a garage, etc., the driver needs the vehicle to drive at a low speed. In order to facilitate the driver to control the low-speed movement of the vehicle, the vehicle usually has a creep function. This function enables the vehicle to maintain a certain power output when the driver does not step on the accelerator pedal. In the creep mode, the vehicle controller sets a basic target torque, calculates the creep torque slope resistance according to the vehicle acceleration parameter information and compensates, so that the vehicle speed maintains a relatively stable output. In the creep mode, the driver cannot adjust the creep target vehicle speed. When the driver brakes to reduce the vehicle speed, the controlle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2063B60L2240/12B60L2240/421B60L2240/423Y02T10/72
Inventor 叶磊沈海寅
Owner 智车优行科技(上海)有限公司
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