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Electric vehicle creep control method and system

A technology of electric vehicles and control methods, which is applied in the direction of electric vehicles, control drives, control devices, etc., and can solve problems such as the inability to adjust the creeping target vehicle speed

Active Publication Date: 2021-09-24
智车优行科技(上海)有限公司
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  • Abstract
  • Description
  • Claims
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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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  • Electric vehicle creep control method and system
  • Electric vehicle creep control method and system

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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 vehicle, the control method comprising: collecting motor speed and brake pedal opening, calculating the current vehicle speed according to the motor speed; judging the creep mode according to the current vehicle speed; Calculate the target vehicle speed; based on the target vehicle speed and the current vehicle speed, calculate the target motor torque through feedback control, and control the motor torque output 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 vehicle speed, and calculates the target vehicle speed according to the creep mode and the brake pedal opening, so that the target vehicle speed is associated with the current speed of the electric vehicle and the brake pedal opening controlled by the driver, so that The driver can control the target vehicle speed of creeping driving, which solves the problem that the existing control method cannot reach the target vehicle speed required by the driver.

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...

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Application Information

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Patent Type & Authority Patents(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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