Vehicle speed limiting auxiliary control method and system
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An auxiliary control and vehicle technology, applied in the direction of control devices, etc., can solve the problems that affect the safety of high-speed driving of the vehicle, the driver is difficult to grasp, and it is too late to respond, so as to reduce the probability of secondary and tertiary faults and reduce operation and psychological burden, the effect of total control
Active Publication Date: 2020-07-03
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +4
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Problems solved by technology
However, due to the short time of the overspeed process, it is difficult for the driver to grasp it. Therefore, for the driver driving a light truck, it is often too late to respond, which makes it difficult to avoid failures on special roads and affects the safety of the vehicle at high speed.
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Embodiment 1
[0060] combine figure 1 As shown, a vehicle speed limit auxiliary control method provided in Embodiment 1 includes:
[0061] Step S101: Obtain the current vehicle speed of the vehicle;
[0062] Step S102: comparing the current vehicle speed with a preset first threshold, a preset second threshold, and a preset third threshold, the second threshold is greater than the first threshold, and the third threshold is greater than the second threshold;
[0063] Step S103: If the current vehicle speed is not greater than the first threshold, execute the step of no gradient control;
[0064] Step S104: If the current vehicle speed is greater than the first threshold and not greater than the second threshold, execute the pedal control step;
[0065] Step S105: if the current vehicle speed is greater than the second threshold and not greater than the third threshold, execute the braking control step;
[0066] Step S106: If the current vehicle speed is greater than the third threshold, ...
Embodiment 2
[0086] combine figure 2 As shown, Embodiment 2 provides a vehicle speed limit auxiliary control system 10, the system is used to implement the above method, and the system 10 includes:
[0087] Obtaining module 20, for obtaining the current vehicle speed of vehicle;
[0088] A comparison module 30, configured to compare the current vehicle speed, a preset first threshold, a preset second threshold and a preset third threshold, where the second threshold is greater than the first threshold, and the third threshold is greater than the second threshold;
[0089] A no-slope control module 41, configured to perform no-slope control when the current vehicle speed is not greater than the first threshold;
[0090] A pedal control module 42, configured to perform pedal control when the current vehicle speed is greater than the first threshold and not greater than the second threshold;
[0091] A braking control module 43, configured to perform braking control when the current vehicl...
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Abstract
The invention provides a vehicle speed limiting auxiliary control method and system in order to reduce the probability that the torque output of a driving motor is zero or high pressure occurs in therunning process of a vehicle and improve the running safety. The method comprises the following steps: obtaining a current vehicle speed of a vehicle; comparing the current vehicle speed with a presetfirst threshold value, a preset second threshold value and a preset third threshold value, wherein the second threshold value is larger than the first threshold value, and the third threshold value is larger than the second threshold value; if the current vehicle speed is not greater than the first threshold value, executing a slope-free control step; if the current vehicle speed is greater thanthe first threshold value and not greater than the second threshold value, executing a pedal control step; if the current vehicle speed is larger than the second threshold value and not larger than the third threshold value, executing a braking control step; and if the current vehicle speed is greater than the third threshold, executing a protection control step. The probability that the torque output of the driving motor is zero or high pressure exists during driving can be reduced, and the driving safety is improved.
Description
technical field [0001] The invention relates to the field of vehicle control, in particular to a vehicle speed limit auxiliary control method and system. Background technique [0002] When the car is running, when it encounters some special roads such as continuous downhill, due to the effect of gravity, even if the driving force is zero, the vehicle may continue to accelerate, and the anti-drag drive motor makes its speed exceed the upper limit of the motor speed. The motor controller ( In order to protect itself, the MCU sends a three-level fault information to the vehicle controller (VCU), and the vehicle controller sends a high-voltage command to the vehicle. On special roads such as downhill, once the entire vehicle is powered off, the driver will feel panic and there is a high possibility of safety risks. At present, the general way to take is to carry out voice prompts, hoping that the driver will control the speed of the vehicle independently to avoid failures. How...
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