Vehicle torsional vibration control method, device and system

A technology of torsional vibration and control method, which is applied in the control of drive, vehicle components, electric vehicles, etc., can solve problems affecting the driving comfort of the whole vehicle and passenger comfort, and achieves improved driving smoothness, good torsional vibration, and reduced shaft speed. The effect of speed fluctuations

Inactive Publication Date: 2016-11-23
SAIC MOTOR
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Problems solved by technology

For example, during the actual operation of an electric vehicle, when the vehicle starts or the torque has a large step response, the transmission system will generate torsional vibration at a fixed frequency, which is manifested by periodic fluctuat

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  • Vehicle torsional vibration control method, device and system
  • Vehicle torsional vibration control method, device and system
  • Vehicle torsional vibration control method, device and system

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Embodiment Construction

[0030] When the torque load of the vehicle drive motor acts on the transmission system, it will cause the torsional vibration of the shaft system of the transmission system. For example, during the actual operation of an electric vehicle, when the vehicle starts or the torque has a large step response, the transmission system will generate torsional vibration at a fixed frequency, which is manifested by periodic fluctuations in the shafting speed of the transmission system, far exceeding the wheel speed Therefore, it brings a feeling of front and rear jitter to the whole vehicle, which affects the driving comfort of the whole vehicle and the comfort of passengers.

[0031] In the prior art, for the torsional vibration of the electric vehicle system, the main method adopted is to reduce the loading slope of the motor torque. However, a too low loading slope will reduce the torsional vibration of the vehicle, so it cannot effectively balance the needs of vehicle torque loading s...

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Abstract

The invention discloses a vehicle torsional vibration control method, device and system. The method comprises the steps of receiving a torque signal emitted by a vehicle controller, detecting the current actual rotating speed of a vehicle and extracting a torsional vibration component of the vehicle, calculating a compensation torque signal with phase opposite to that of the torque signal according to the torsional vibration component, and conducting compensation on the torque signal according to the compensation torque signal. By the adoption of the vehicle torsional vibration control method, device and system, torsional vibration of transmission systems of electric vehicles can be reduced, and vehicle driving smoothness can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicle power control, in particular to a method, device and system for controlling torsional vibration of a vehicle. Background technique [0002] Electric vehicles are vehicles powered by electric energy, usually using high-efficiency rechargeable batteries or fuel cells as the power source. An electric car does not need an internal combustion engine, its electric motor is equivalent to the engine of a traditional car, and the battery is equivalent to the original fuel tank. Because it has less impact on the environment than traditional cars, its prospects are widely optimistic. [0003] The power transmission system of electric vehicles is mainly composed of power batteries, fuel cells, energy storage capacitors and other energy sources, power electronic devices, drive motors, gearboxes, drive shafts and other parts. Compared with internal combustion engine vehicles, the power transmission system of ...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 欧阳启程伟孙逸神梁潇曹建荣梁伟铭
Owner SAIC MOTOR
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