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Drive torque distribution method, device and automobile

A driving torque and front-drive technology, applied in the automotive field, can solve problems such as vehicle loss of stability, and achieve the effect of avoiding vehicle flicking or sideslip, ensuring operation stability and safety performance, and ensuring safety performance

Active Publication Date: 2017-02-08
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a driving torque distribution method, device, and vehicle to solve the problem that the driving torque distribution strategy in the prior art does not take into account the handling stability of the vehicle, causing the vehicle to flick or skid and cause the vehicle to lose stability

Method used

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  • Drive torque distribution method, device and automobile
  • Drive torque distribution method, device and automobile
  • Drive torque distribution method, device and automobile

Examples

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Effect test

Embodiment 1

[0071] Such as figure 1 As shown, the driving torque distribution method provided by Embodiment 1 of the present invention includes:

[0072] Step 101, determine the output drive torque of the vehicle.

[0073] The present invention is applied to a vehicle controller. Firstly, the vehicle controller needs to determine a required output drive torque of the vehicle according to the pedals. The pedal here includes a brake pedal and an accelerator pedal. When it is detected that the switch signal of the brake pedal is on, it is determined that the brake pedal signal is valid, and the first output drive torque corresponding to the pedal is zero at this time. When the switch signal is off, the first output driving torque is calculated according to the opening degree signal of the accelerator pedal. At the same time, the current effective power of the power battery needs to be obtained, and the second output driving torque supported by the power battery is determined according to t...

Embodiment 2

[0086] Such as figure 2 As shown, the driving torque distribution method provided by Embodiment 2 of the present invention includes:

[0087] Step 201 , acquiring an accelerator pedal opening signal, and calculating a first output driving torque required by the accelerator pedal according to the accelerator pedal opening signal.

[0088] First, the vehicle controller needs to determine the first output driving torque according to the pedal. The pedal here includes a brake pedal and an accelerator pedal. When it is detected that the switch signal of the brake pedal is on, it is determined that the brake pedal signal is valid, and the first output drive torque corresponding to the pedal is zero at this time. When the switch signal is off, the first output driving torque is calculated according to the opening degree signal of the accelerator pedal.

[0089] Step 202. Obtain the current effective power of the power battery, and determine the second output driving torque corresp...

Embodiment 3

[0130] Such as Image 6 As shown, the drive torque distribution system architecture provided by Embodiment 3 of the present invention includes:

[0131] The vehicle controller 600, the brake pedal 601 and the accelerator pedal 602 electrically connected to the input end of the vehicle controller 600;

[0132] The brake anti-lock braking system 603, the steering wheel angle sensor 604 and the battery management system 605 connected to the input end of the vehicle controller 600 through the CAN bus; and

[0133] A front axle motor controller 606 and a rear axle motor controller 607 connected to the output end of the vehicle controller 600 through the CAN bus, wherein the front axle motor controller 606 is connected to the front drive motor 608, and the rear axle motor controller 607 is connected to the rear axle motor controller 607. The drive motor 609 is connected.

[0134] Specifically, when the vehicle controller 600 detects that the switch signal of the brake pedal 601 is...

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Abstract

The invention provides a drive torque distribution method, device and automobile. The method comprises the following steps: determining the whole output drive torque; determining the front-axle drive torque coefficient and the rear-axle drive torque coefficient according to the current steering wheel speed, current steering wheel angle and current speed; determining the front-axle reference drive torque and the rear-axle reference drive torque according to the whole output drive torque, the front-axle drive torque coefficient and the rear-axle drive torque coefficient; and determining the front-axle target drive torque and the rear-axle target drive torque according to the front-axle reference drive torque, the rear-axle reference drive torque and the front drive torque limit output value and rear drive torque limit output value obtained in advance, and sending to corresponding motor controllers. In the embodiment of the invention, the rear-axle drive torque can be increased in the case of vehicle emergency drive, the vehicle safety is guaranteed, and the phenomenon of drift or sideslip caused by the over-steering characteristic of the vehicle can be avoided.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a driving torque distribution method, device and automobile. Background technique [0002] At present, the driving torque distribution of the front and rear axles of electric vehicles or hybrid four-wheel drive vehicles is generally determined based on the efficiency of the motor / engine or the axle load of the front and rear axles. The former can make the vehicle more dynamic or economical, while the latter Then the phenomenon of driving slippage of the vehicle can be avoided as much as possible. These two drive torque distribution methods are insufficient in considering the handling stability of the vehicle, which can easily cause the vehicle to have oversteering characteristics, resulting in flicking or side slipping, and then causing the vehicle to lose stability. Contents of the invention [0003] Embodiments of the present invention provide a driving torque distributi...

Claims

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Application Information

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IPC IPC(8): B60L15/28
CPCB60L15/28B60L2220/42B60L2240/423B60L2260/44Y02T10/72
Inventor 刘彪易迪华张龙聪
Owner BEIJING ELECTRIC VEHICLE
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