A half-slope parking braking method for pure electric vehicles
A pure electric vehicle, half slope technology, applied in the direction of electric vehicles, drive interaction, control drive, etc., can solve the problem of not providing pure electric vehicle half slope parking brake technology, to achieve the effect of accurate judgment and safety assurance
Active Publication Date: 2018-08-14
WM MOTOR TECH GRP CO LTD
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The prior art has not yet provided a half-slope parking brake technology for pure electric vehicles
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0020] The invention provides a half-slope parking braking method for a pure electric vehicle, which is based on figure 1 The shown half-slope parking system for pure electric vehicles specifically includes the following steps:
[0021] S1: step on the accelerator pedal, the accelerator pedal signal outputs the accelerator torque request T2 through the accelerator interpretation module;
[0022] S2: The speed sensor collects the motor speed and obtains the real-ti...
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The invention provides a hill parking brake method for a blade electric vehicle. The method includes the following steps that an accelerator torque request T2 is output, and parking torque T1 is output through an adjustor PI3; whether T2 is assigned to the motor torque request T*or not is judged through a torque arbitration module; if the current motor rotating speed is smaller than zero, T1 is assigned to the motor torque request T*, and otherwise T2 is assigned to the motor torque request T*; after arbitration, according to quadrature-axis inductance lq and direct-axis inductance ld, a motor permanent magnet link fai converts T*into quadrature-axis current iq*and direct-axis current iq*requests through an MTPA module; the actual quadrature-axis currents iq*and direct-axis currents iq are obtained; finally, quadrature-axis voltage uq*and direct-axis voltage ud*are obtained and fed into voltage space vector pulse modulation to obtain on-off states of respective power switch tubes, and the on-off states are used for driving a motor through an inverter circuit. Whether the vehicle is in a hill state or not can be detected well, motor drive is controlled to complete automatic hill parking, judgment is accurate, and safety of the electric vehicle is ensured.
Description
technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a half-slope parking braking method for pure electric vehicles. Background technique [0002] The traditional handbrake needs to rely on the driver to manually release the handbrake or skillfully cooperate with the accelerator and clutch to start comfortably when starting on a slope. The AUTO HOLD automatic parking function provides accurate parking force by the controller through the slope sensor. When starting, the parking control unit calculates the information provided by the clutch distance sensor, clutch kneading speed sensor, accelerator pedal sensor, etc., when When the driving force is greater than the driving resistance, the parking brake is automatically released, so that the car can start smoothly. Even if you usually drive in the urban area, as long as you enable the AUTO HOLD function, the corresponding automatic parking function will be activated. The i...
Claims
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IPC IPC(8): B60L15/20
CPCB60L15/2018B60L2240/421B60L2240/429B60L2250/28Y02T10/72
Inventor 谢春林
Owner WM MOTOR TECH GRP CO LTD