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Method and system for controlling low-speed worming

A control method and creeping technology, applied in the field of low-speed creeping control methods and systems, can solve problems such as poor torque control, body jitter, affecting driving comfort, etc., to solve jitter problems, improve ride comfort, The effect of improving driving comfort

Active Publication Date: 2015-06-03
BEIJING ELECTRIC VEHICLE
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Problems solved by technology

However, the current low-speed creep mode often achieves low-speed driving by controlling the motor torque, but the motor is in the constant torque region when running at low speed, the torque is not easy to control, and the vehicle body is prone to vibration, which affects driving comfort. Motor torque accuracy is not high at low speed, resulting in low control accuracy

Method used

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  • Method and system for controlling low-speed worming
  • Method and system for controlling low-speed worming

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. However, it should be noted that the implementations described with reference to the drawings are exemplary, and are only used to explain the present invention, but not to limit the present invention.

[0024] Low-speed creeping—it simulates the idling function of traditional automatic transmission vehicles. When the driver releases the brake pedal and does not step on the accelerator pedal in the parking state, the car will slowly crawl forward. It is currently available in all electric vehicles. a working mode.

[0025] like figure 1 A low-speed creeping control system shown includes a vehicle controller VCU, a motor controller MCU, a motor, a brake pedal, an accelerator pedal, and a gear position. The motor controller MCU detects the braking position of the vehicle through the vehicle controller VCU. The target sp...

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Abstract

The invention provides a method and a system for controlling low-speed worming. The method includes that a vehicle control unit (VCU) collects current vehicle state signal and sends the same to a motor control unit (MCU); the MCU determines current working mode by controlling target rotating speed of a motor according to the current vehicle state signal; the VCU controls rotating speed and working mode of the motor by detecting braking pedal signal, acceleration pedal signal, gear position signal and actual motor rotating speed signal fed back by the motor of a vehicle, and the MCU controls the motor to realize control on low-speed worming of the vehicle.

Description

technical field [0001] The invention relates to the field of driving control of pure electric vehicles, in particular to a low-speed creeping control method and system. Background technique [0002] With the obvious advantages of energy saving and environmental protection, pure electric vehicles will be one of the important directions for the development of the automobile industry in the future. Coupled with the government's support for the new energy industry, the market and applications will be broader and deeper in the future. [0003] Different from the working mechanism of traditional cars driven by engines, pure electric vehicles are driven by drive motors. When driving at low speeds, pure electric vehicles output constant torque through the motors to ensure good acceleration performance. However, when the car is parked and parked, or when following a car in a congested road, the car is driven at a low speed, and the driver's operation is difficult to control. This is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 陆中奎魏跃远
Owner BEIJING ELECTRIC VEHICLE
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