Controlling method for limping of pure electric vehicle
A pure electric vehicle and control method technology, applied in the field of pure electric vehicle limp control, can solve problems such as poor performance, and achieve the effect of avoiding vehicle safety accidents
Inactive Publication Date: 2017-12-29
合肥力正新能源科技有限公司
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Problems solved by technology
When the computer finds that a certain sensor data is abnormal, on the one hand, the fault light will alarm, and on the other hand, a constant will be used to replace the sensor data, but the performance is slightly worse
The limp mode currently provided by prior art requires additional hardware implementation
Method used
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[0016] 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.
[0017] Such as figure 1 As shown, the present invention provides a kind of pure electric vehicle limp control method, and it comprises the following steps:
[0018] S1: Connect the output of the dual accelerator pedal sensor to the vehicle controller through the filter acquisition circuit, and the A / D conversion module inside the vehicle controller converts the two accelerator opening values collected by the dual accelerator pedal sensor into pedal1 and peda2; ...
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The invention provides a controlling method for limping of a pure electric vehicle. The controlling method comprises the following steps that when a first accelerator is damaged, request torque T_ref is set as T_peda / 2, and the limping mode is carried out; if an electric current sensor is damaged, the limping mode is quitted, the request torque T_ref is set as T_peda ; if not damaged, the limping mode is continued to be carried out; when a second accelerator is damaged, working is conducted in accordance with the state when the first accelerator is damaged; if peda_diff is greater than max_diff, the T_ref is set as T_peda / 3; if the peda_diff is less than min_diff, the limping mode is quitted; and if the peda_diff is greater than or equal to the min_diff, the limping mode is carried out. According to the controlling method for limping of the pure electric vehicle, a whole vehicle controller requests preset torque to a motor controller in the limping mode, safety accidents of the vehicle are avoided, and meanwhile, the vehicle can limp to a nearby maintenance shop for being maintained.
Description
technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a limp control method for pure electric vehicles. Background technique [0002] The car limp mode means that when the electronic control unit in the car fails, the VCU automatically activates the backup control algorithm to simply control the motor, so that the car can be driven home or repaired at a nearby auto repair shop. Such a function is failure operation. Electric vehicles have various electronic sensors and actuators. If a sensor is damaged, the computer’s judgment will be wrong. Therefore, the designer designs a special program, which is the limp home mode. When the computer finds that a certain sensor data is abnormal, on the one hand, the fault light will alarm, and on the other hand, a constant will be used to replace the sensor data, but the performance is slightly worse. The limp mode currently provided by prior art requires additional hardware imple...
Claims
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Login to View More IPC IPC(8): B60L15/20B60R16/02
CPCB60L15/20B60R16/02Y02T10/72
Inventor 章琴
Owner 合肥力正新能源科技有限公司