Method for fulfilling slope starting assist control function of electric automobile

A hill start and auxiliary control technology, which is applied to control devices, vehicle components, external condition input parameters, etc., can solve problems such as the inability to realize hill start auxiliary control, and achieve the effect of improving driving safety and driving performance

Inactive Publication Date: 2014-04-30
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional internal combustion engine vehicles that are not equipped with body e

Method used

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  • Method for fulfilling slope starting assist control function of electric automobile
  • Method for fulfilling slope starting assist control function of electric automobile

Examples

Experimental program
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Example Embodiment

[0037] Example one

[0038] In a pure electric vehicle, the vehicle controller communicates with other controllers (such as motor controllers, battery management systems), sensors (pedal position sensors, temperature sensors, handbrake position sensors, etc.) on the vehicle through hard-wire and CAN networks. Actuators (drive motors, water pumps, fans, etc.) form a complete vehicle power control system. This pure electric vehicle adopts a fixed gear transmission. The drive motor directly drives the wheels through a single-stage reducer. The gear positions are divided into forward gear, reverse gear and neutral gear. The vehicle controller is responsible for calculating the torque target value of the drive motor, and sends it to the motor controller through the power system CAN network. After the motor controller receives the torque command from the vehicle controller, it controls the drive motor to make the correct torque. In response, drive the vehicle.

[0039] The vehicle hill...

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Abstract

The invention relates to a method for fulfilling a slope starting assist control function of an electric automobile. The method comprises the following steps of (1), determining an activating condition; entering a to-be-activated state of the function when a driver steps on a brake pedal, the automobile is in a static state, but a hand brake is not pulled upward and the gear of the automobile is a forward gear; and activating the slope starting assist control function if the automobile begins to slide after the driver releases the brake pedal; and (2), correcting the target value of the torque of a driving motor, rapidly increasing the output torque of the motor after the slope starting function is activated so that the automobile does not slide, and keeping the torque output to enable the automobile to be static in situ. When the driver steps down the accelerating pedal, the slope starting assist control function is withdrawn automatically, and the automobile is stably started on a slope. By accurately controlling the torque output of the motor when the automobile is started on the abrupt slope, sliding of the automobile is avoided under the condition that the hand brake is not pulled upwards, the driver can calmly move a foot from the brake pedal to the accelerating pedal, and slope starting is finished.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for realizing the auxiliary control function of an electric vehicle starting on a hill. Background technique [0002] When the driver drives the vehicle on a steep road (such as an underground garage ramp) or a smooth slope (such as an icy road) and then starts to go uphill, no matter whether the driving model is manual or automatic, if the handbrake is not used Braking, when the right foot leaves the brake pedal, the vehicle will slide backwards (slope) to varying degrees, which may easily cause accidents. Therefore, before the vehicle starts on a slope, the driver usually pulls on the handbrake to keep the vehicle stationary, then quickly depresses the accelerator pedal after releasing the brake pedal, and releases the handbrake while the vehicle is starting, which increases the difficulty of driving the vehicle. [0003] The hill start assist control functi...

Claims

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Application Information

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IPC IPC(8): B60W30/18
CPCB60W10/08B60W30/18027B60W2510/0604B60W2510/083B60W2510/18B60W2552/00B60W2710/083
Inventor 赵辛蒙张君鸿姜炜王帅宇
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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