A control method for a distributed drive electric vehicle
A technology of electric vehicles and control methods, which is applied in the direction of electric vehicles, control drives, vehicle components, etc., and can solve the problems that the wheels are prone to severe slippage
Active Publication Date: 2016-04-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] In order to solve the problem that the wheels of existing distributed drive electric vehicles are prone to violent slippage on bad roads, especially during the process of getting out of trouble, the present invention proposes a control method for distributed drive electric vehicles. The method includes the following steps:
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[0023] to combine figure 1 and 2 The specific implementation steps of the control method of the distributed drive electric vehicle (hereinafter referred to as electric vehicle) of the present invention will be described in detail.
[0024] Collect the wheel angle, wheel speed and vehicle speed of the electric vehicle, and judge whether the electric vehicle is trapped and needs to be dealt with.
[0025] During the straight-line driving process of the electric vehicle, the vehicle controller on the electric vehicle respectively collects the wheel angle δ of the four wheels of the electric vehicle through the wheel angle sensor, and collects the wheel angle δ of the four wheels of the electric vehicle through the wheel speed sensor respectively. The speed ω is used to collect the vehicle speed v of the electric vehicle through the vehicle speed sensor. The vehicle controller judges whether the electric vehicle encounters difficulties according to the judgment conditions shown ...
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The invention relates to the field of control of electric vehicles, and discloses a control method of a distributed driving electric vehicle, aiming to solve the problem of severe skid of wheels during escaping of the conventional distributed driving electric vehicle in a trapped state. The control method comprises the following steps: an overall controller on the electric vehicle running along a straight line acquiring the wheel rotation angle delta, wheel angular speed omega and vehicle speed v of the electric vehicle, judges whether the electric vehicle is trapped or not according to the data, and performs control on the electric vehicle according to driving requirements; when the electric vehicle is trapped, the overall controller performs escaping processing by adopting an escaping control strategy till the opening of a corresponding acceleration pedal of a skidding wheel is smaller than or equal to the acceleration pedal opening corresponding to the wheel rotating speed omegawollow of the wheel to finish escaping, and performs control on the electric vehicle according to driving requirements. By adopting the control method, the skidding degrees of wheels can be lowered, tire wear is reduced, free energy output is reduced, and the aggravation of the severity of pavements is avoided.
Description
technical field [0001] The invention relates to the control field of electric vehicles, in particular to a control method for distributed drive electric vehicles. Background technique [0002] Facing the increasingly severe energy situation and environmental protection pressure in the world, in recent years, electric vehicles have gradually emerged and become a major trend in the development of automobiles. [0003] Such as figure 1 As shown, the power battery 1 of a distributed drive electric vehicle is connected to four in-wheel motors 4 provided on four wheels 3 through four inverters 2, and provides power for the in-wheel motors 4 to drive the wheels 3 to rotate. During the running of the distributed electric vehicle, the vehicle controller 5 sends a control command to the hub motor 4 through the inverter 2 according to the detected vehicle state, and the hub motor 4 applies a driving torque to the wheel 3 to make the wheel 3 rotate. Since the traditional mechanical tr...
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IPC IPC(8): B60L15/32
Inventor 何洪文刘新磊孙晓坤
Owner BEIJING INSTITUTE OF TECHNOLOGYGY