CN-117261499-B - Tyre under-voltage alarm method, under-voltage alarm device and vehicle

CN117261499BCN 117261499 BCN117261499 BCN 117261499BCN-117261499-B

Abstract

The invention discloses an under-voltage alarming method, an under-voltage alarming device and a vehicle for a tire, wherein the under-voltage alarming method for the tire comprises the following steps of waking up a tire pressure controller after the vehicle is electrified and acquiring the speed of the vehicle; the relation between the speed of the vehicle and the preset speed is judged, wherein a first threshold value is used as an undervoltage alarm threshold value when the speed is smaller than the preset speed, a second threshold value is used as the undervoltage alarm threshold value when the speed is larger than or equal to the preset speed for the first time, and the tire pressure controller alarms when the tire pressure detected by the tire pressure controller is smaller than the undervoltage alarm threshold value. Therefore, the speed of the tire is detected and monitored when the vehicle runs and is judged to be in different stages, so that the alarm threshold value is adjusted, the alarm threshold value of the tire can be updated according to the running speed of the tire, and the under-voltage alarm accuracy of the tire is higher.

Inventors

DAI FENGCHI
LI CHANG
CHEN JIALONG
LIU YANHONG
ZHANG LIFENG

Assignees

北汽福田汽车股份有限公司

Dates

Publication Date: 20260508
Application Date: 20220613

Claims (9)

1. The under-voltage alarming method for the tire is characterized by comprising the following steps of: after the vehicle is electrified, waking up the tire pressure controller, and acquiring the speed of the vehicle; judging the relation between the speed of the vehicle and the preset speed: When the speed is smaller than the preset speed, a first threshold value is adopted as an undervoltage alarm threshold value; When the speed is greater than or equal to the preset speed for the first time, a second threshold is adopted as an undervoltage alarm threshold; when the tire pressure detected by the tire pressure controller is smaller than an undervoltage alarm threshold value, the tire pressure controller alarms; judging whether the vehicle enters a fortification state or not: And after the vehicle enters the fortification state for a second preset time, clearing the tire pressure Pwarm of the warm tire.
2. The method of claim 1, wherein the first threshold is a product of a recommended tire pressure value and a safety scaling factor.
3. The method for warning of an undervoltage of a tire according to claim 1, wherein the second threshold value is a product of a tire pressure Pwarm value of the warm tire and a safety proportionality coefficient; the tire pressure Pwarm value of the warm tire is updated along with the current tire pressure value according to a preset calculation mode, and the initial value of the tire pressure Pwarm value of the warm tire is a recommended tire pressure value.
4. A tire under-pressure warning method according to claim 3, characterized in that, The tire pressure Pwarm value of the warm tire is updated according to the preset calculation mode: The preset calculation mode includes comparing the current tire pressure value received each time with the current Pwarm value, if the current tire pressure value is larger than the current Pwarm value, updating the current Pwarm value to the current tire pressure value, otherwise, not updating the Pwarm value.
5. The method of claim 4, wherein the tire pressure Pwarm is updated according to the following predetermined calculation: the preset calculation mode further comprises the steps of comparing the current tire pressure value with the recommended tire pressure value: If the current tire pressure value is larger than the recommended tire pressure value, updating the current tire pressure value to Pwarm; If the current tire pressure value is smaller than or equal to the recommended tire pressure value, the recommended tire pressure value is updated to Pwarm.
6. The method of claim 1, further comprising the step of: judging whether the tire pressure controller enters a dormant state or not: and after the tire pressure controller enters a dormant state, clearing the tire pressure Pwarm value of the warm tire.
7. The method of claim 1, further comprising the step of: judging whether the tire pressure controller enters a dormant state or not: And after the tire pressure controller enters a dormant state, the warm tire pressure Pwarm value is restored to an initial value.
8. An under-pressure warning device of a tire, said under-pressure warning device being adapted to the under-pressure warning method of a tire according to any one of claims 1 to 7, comprising: a tire, and; a tire pressure controller configured to detect a tire pressure of the tire, the tire pressure controller alarming when the tire pressure is less than an under-pressure alarming threshold; Wherein the under-voltage alarm threshold is one of the first threshold and the second threshold; and when the speed is greater than or equal to the preset speed for the first time, adopting the second threshold value as an undervoltage alarm threshold value.
9. A vehicle comprising an under-pressure warning device using the tire according to claim 8.

Description

Tyre under-voltage alarm method, under-voltage alarm device and vehicle Technical Field The invention relates to the technical field of vehicle detection, in particular to an undervoltage warning method and an undervoltage warning device for a tire and a vehicle. Background In the related art, it is necessary to monitor the tire pressure of a tire of a vehicle and alarm when the tire pressure is less than an alarm threshold. However, in the prior art, a fixed threshold is often used as an alarm threshold, and the setting of the alarm threshold is relatively dead and can not be combined with the actual use condition of the vehicle tire to dynamically update the alarm threshold, so that the monitoring alarm of the tire is separated from the actual use condition of the vehicle, and the accuracy of the under-voltage alarm of the vehicle tire is reduced. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a tire under-voltage alarm method, which is more accurate and reliable. Another object of the present invention is to provide an under-voltage alarm device for a tire, which is suitable for the under-voltage alarm method. It is still another object of the present invention to provide a vehicle in which the under-pressure warning method of the tire as described above is used. The method for alarming the under-pressure of the tire according to the embodiment of the invention comprises the following steps: after the vehicle is electrified, waking up the tire pressure controller, and acquiring the speed of the vehicle; judging the relation between the speed of the vehicle and the preset speed: When the speed is smaller than the preset speed, a first threshold value is adopted as an undervoltage alarm threshold value; When the speed is greater than or equal to the preset speed for the first time, a second threshold is adopted as an undervoltage alarm threshold; and when the tire pressure detected by the tire pressure controller is smaller than the under-voltage alarm threshold value, the tire pressure controller alarms. According to the tire under-voltage alarming method, the speed of the tire is detected, monitored and judged to be in different stages when the vehicle runs, so that the alarming threshold value of the tire can be adjusted, and the alarming threshold value of the tire can be updated according to the running speed of the tire, so that the accuracy of the tire under-voltage alarming is higher. In some embodiments, the first threshold is a product of a recommended tire pressure value and a safety scaling factor. In some embodiments, the second threshold is a product of a warm tire pressure Pwarm value and a safety scaling factor, the warm tire pressure Pwarm value is obtained by updating the warm tire pressure Pwarm value along with the current tire pressure value according to a preset calculation mode, and an initial value of the warm tire pressure Pwarm value is a recommended tire pressure value. In some embodiments, the warm tire pressure Pwarm value is updated according to the preset calculation mode: The preset calculation mode comprises the steps of comparing the current tire pressure value received each time with the current Pwarm value, if the current tire pressure value is larger than the current Pwarm value, updating the Pwarm value to the current tire pressure value, otherwise, not updating the Pwarm value. In some embodiments, the warm tire pressure Pwarm value is also updated according to the following preset calculation: The preset calculation mode further comprises the steps of comparing the current tire pressure value with the recommended tire pressure value, updating the current tire pressure value to be Pwarm if the current tire pressure value is larger than the recommended tire pressure value, and updating the recommended tire pressure value to be Pwarm if the current tire pressure value is smaller than or equal to the recommended tire pressure value. In some embodiments, the method further comprises the steps of: judging whether the vehicle enters a fortification state or not: After the vehicle enters a fortification state for a second preset time, clearing the tire pressure Pwarm value of the warm tire, or; And after the vehicle enters the fortification state for a second preset time, recovering the tire pressure Pwarm of the warm tire to an initial value. In some embodiments, the method further comprises the steps of: judging whether the tire pressure controller enters a dormant state or not: And after the tire pressure controller enters a dormant state, clearing the tire pressure Pwarm value of the warm tire. In some embodiments, the method further comprises the steps of: judging whether the tire pressure controller enters a dormant state or not: And after the tire pressure controller enters a dormant state, the warm tire pressure Pwarm value is res