KR20090017148A - Method of realizing auto running / auto location and tire pressure monitoring system - Google Patents

Abstract

Tire pressure monitoring system, and auto running and auto location implementation method using the same are provided that the malfunction due to the location shift or replacement of tire is prevented. A tire pressure monitoring system comprises a TPMS sensing module(20) installed at the wheel(10) the pneumatic pressure and temperature of tire are detected, a TPMS receiver determining the normality whether or not of tire. The TPMS receiver receives the pneumatic pressure of each tire through the TPMS sensing module and Information. The TPMS sensing module comprises the detection sensor(21) which is installed in order to sense the desorption of tire. The detection sensor measures the acceleration to the direction in which the rotational direction and tire of tire incline. The detection sensor measures the acceleration when the eradicated tire inclines with the gravity.

Description

Tire pressure monitoring system and method for realizing auto running and auto location using same {METHOD OF REALIZING AUTO RUNNING / AUTO LOCATION AND TIRE PRESSURE MONITORING SYSTEM}

The present invention relates to a tire inflation pressure monitoring system for properly detecting a tire that has been changed or replaced so that only a corresponding tire is performed with auto running and auto location, and a method for implementing auto running and auto location using the same.

In general, a tire mounted on a vehicle has a function of a spring and a damper that transmits a driving force, a braking force, a lateral force, etc. of the vehicle to the road surface while supporting the load of the vehicle from the road surface, and alleviates the impact on the road surface.

When the air pressure is higher than the appropriate pressure, such a tire may cause a trapping phenomenon, resulting in poor riding comfort and faster tire wear.

On the other hand, when the air pressure is lower than the appropriate pressure, the wear phenomenon of the tire is not only faster, but in severe cases, a puncture may be generated while driving, resulting in a traffic accident, degrading the operability of the vehicle, and lowering fuel economy. Therefore, it is very important to maintain the proper pressure of the tire.

To this end, in recent years, a tire inflation pressure monitoring system (TPMS) has been developed for informing a driver of a tire's physical condition such as tire pressure and temperature.

1 schematically shows the configuration of a general tire pressure monitoring system.

As shown in FIG. 1, a general tire pressure monitoring system is installed around the TPMS sensing module 1 mounted on each wheel of the vehicle C and transmits the position information of the corresponding tire installed around the TPMS sensing module 1. TPMS receiver for determining whether the tire is normal by receiving the position information of the tire transmitted from the initiator 2 and the initiator 2 and the air pressure and temperature information of each tire from the TPMS sensing module 1 ( 3) and a display unit 4 which displays a warning light on when the air pressure of the tire decreases and a system abnormality occurs according to the control signal of the TPMS receiver 3.

 On the other hand, the current TPMS system can not receive information that can determine when changing or replacing the tire position from the TPMS sensing module 1 or from the external input terminal.

Accordingly, the concept of changing or replacing the tire at the time of keying off enables auto running and auto location to be automatically performed when the vehicle is re-run after keying off, thereby enabling normal operation of the TPMS sensing module 1.

Auto running is a function to normally implement the warning about the change of the tire position or the pressure drop of the replaced tire, and Auto Location is a function to implement the warning of the lower pressure and abnormal tire position. Without these functions, if the tire is moved after changing or replacing the tire position, the TPMS sensing module ID is not learned. Therefore, it is impossible to detect the reduced air pressure of the changed or replaced tire. This causes the inconvenience that the user must learn the TPMS sensing module ID of the tire whose position is changed or replaced by using the TPMS diagnostic apparatus.

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, the object of the present invention is to perform the conditions of the auto running and auto location as the removal condition of the wheel to the axle, not the key off / on. By changing it, the battery performance of the TPM sensing module caused by the auto-run and auto-location functions that are operated at every key off / on can be prevented, and the malfunction caused by changing or replacing the tire without key-off can be prevented. The present invention provides a tire pressure monitoring system and a method of implementing auto running and auto location using the tire pressure monitoring system.

The present invention provides a TPMS sensing module installed on the wheel to detect the air pressure and temperature of the tire; A TPMS receiver receiving air pressure and temperature information of each tire through the TPMS sensing module and determining whether the tire is normal; The TPMS sensing module is characterized in that a detection sensor for detecting the detachment of the tire is installed.

In addition, the present invention comprises the steps of measuring the acceleration in the direction in which the tire is inclined when the tire is removed by a sensor provided in the TPMS sensing module; If the detected tire acceleration is greater than or equal to a reference value, recognizing the tire acceleration and detachment information and storing the tire acceleration information in a register; And transmitting the stored information to the TPMS receiver to perform only auto running and auto location of the corresponding tire.

In addition, the present invention is a TPMS sensing module installed on the wheel to detect the air pressure and temperature of the tire; A TPMS receiver receiving air pressure and temperature information of each tire through the TPMS sensing module and determining whether the tire is normal; Including a sensor installed on the vehicle body to detect the change in the height of the tire detachment, characterized in that configured to recognize a change or replacement of the tire position when the height of the tire mounted portion is higher than the limit .

In addition, the present invention comprises the steps of recognizing a change or replacement of the position of the tire when the height of the tire mounting portion of each tire is higher than the limit; Storing information about the detachment of the tire; And transmitting the stored information to the TPMS receiver so that only the tire performs auto running and auto location, and the auto running and auto location implementation method of the tire air pressure monitoring system is configured.

As described above, according to the pneumatic pressure monitoring system and the method for implementing auto running and auto location using the same, since the auto running and the auto location are performed only when the tire is substantially changed or replaced, the TPMS is the same as before. In addition to reducing unnecessary waste of the battery included in the sensing module and preventing malfunctions caused by interference of the sensor ID of another vehicle with the vehicle being learned, RSSI generated when driving or rotating in a strong electric field area The small differences can reduce the possibility of auto-run and auto-location failures.

The present invention does not perform auto running and auto location every time the key-on as in the prior art, and the auto running and auto location of the tire are detected only when the removal of the tire due to the change or replacement of the tire is detected by a sensing means provided separately. Tire air pressure monitoring system that can be carried out and how to implement auto running and auto location using the same.

Referring to the accompanying drawings, a first embodiment of the present inventors' tire pressure monitoring system (TPMS) and a method of implementing auto running and auto location using the same will be described.

2 to 5 are views for explaining the first embodiment of the present invention, Figure 2 is a schematic diagram showing the interconnection structure between the TPMS sensing module and the TPMS receiver, Figure 3 is a schematic diagram of the installation structure of the TPMS sensing module 4 is a front view and a side view of a sensor mounted in the TPMS sensing module shown in FIG. 3, and FIG. 5 is a side view illustrating an example of removing the wheel.

First, the first embodiment of the present invention is to detect when the wheel 10 is removed from the axle to perform the auto running and auto location of the tire (FR, FL, RR, RL), the overall configuration Is the same as the conventional TPMS configuration, and since only the control logic and the detection sensor 21 mounted on the TPM sensing module 20 are omitted, the overall content of the operation of the TPMS is omitted.

The detection sensor 21 is an acceleration sensor that detects using the acceleration generated as the wheel moves. In this case, the acceleration sensor may not only detect a change in the Z direction, which is the driving direction of the wheel, as shown in FIG. 4, but also detect the inclination of the wheel 10 in the X direction, which is outward with respect to the axle. By applying the bidirectional acceleration sensor, the wheel 10 can be easily detected by using the generated acceleration value.

That is, the tires FR, FL, RR, and RL are removed from the axle when the wheel 10 is changed or replaced as shown in FIG. 5 and laid on the ground or leaned against a wall.

At this time, the tire (FR, FL, RR, RL) is inclined in the X direction by gravity, the acceleration is generated, the acceleration sensor recognizes the generated acceleration value to determine whether to remove the tire (FR, FL, RR, RL). When it is determined, the information is stored in a register and transmitted to the TPMS receiver 30 as an RF signal, and the TPMS receiver 30 compares the values to determine the tires FR, FL, RR, RL. Since the change of position and replacement can be easily recognized, only the changed position or replaced tire (FR, FL, RR, RL) can perform auto running and auto location.

The TPPS configured as described above performs auto running and auto location by the following control method.

6 is a control flow diagram of TPMS autorun and auto location according to the first embodiment of the present invention, Figure 6a is a control flow diagram of the TPMS sensing module, Figure 6b is a control flow diagram of the TPMS receiver.

The TPMS auto running and auto location implementation method according to the first embodiment of the present invention detects and stores the acceleration of gravity generated when the tire is removed and recognizes and stores the information on the removal of the tire according to the detected reference value of the acceleration of gravity. By sending the stored information to the TPMS receiver, only the corresponding tire performs auto running and auto location.

Therefore, the TPMS sensing module detects an acceleration that changes when the tire is removed (S110), and when the detected acceleration value corresponds to a reference value (S120), the TPMS sensing module determines that the tire is replaced and stores the flag value as '1'. If the acceleration value does not correspond to the reference value (S130), it is determined that the tire is not replaced (S140), the flag value is stored as '0' (S150), and the RF value is transmitted to the TPMS receiver during key-on or driving. Transmit (S160).

Meanwhile, when the flag value received from the TPMS sensing module is '0' (S220), the TPMS receiver prohibits the execution of auto running and auto location (S230), and the received flag value is '1'. Only in the case of performing the auto running and auto location (S240).

Referring to the accompanying drawings, a second embodiment of the present invention, the air pressure monitoring system and the method of implementing auto running and auto location using the same will be described in detail as follows.

7 and 8 are views for explaining a second embodiment of the present invention, Figure 7 is a schematic diagram showing the interconnection structure between the sensor and the receiver, Figure 8 is a schematic diagram showing the structure of the sensor to be.

The second embodiment of the present invention is installed in the vehicle body 40 around the four wheels 10 in such a way that the sensing means 20 'detects the change of the garage so as to detect the detachment of the wheels 10. Enabled by the height sensor.

That is, in order to replace one or more tires (FR, FL, RR, RL), it is necessary to increase the height of the corresponding tire (FR, FL, RR, RL) positions. By using the sensor 20 'installed at the vehicle body at the corresponding position, it is possible to easily determine which position of the tire FR, FL, RR, RL has been replaced.

In the present invention, the height sensor, which is a sensor 20 ', is provided with a switch 22 structure in which power is applied at the maximum garage position as shown in FIG. 8 to store state information of whether the garage is raised even when the key is off. .

Therefore, when the garage rises to the maximum position, power is supplied to the contact point of the switch, and the state data of the maximum rise position of the garage is stored in the memory 23, and the TPMS receiver 30 is connected via CAN / LIN communication or wire at the time of key-on. In order to replace the tires, the vehicle transmits the state information indicating that the garage has risen to the maximum, and the TPMS receiver 30 receives it, and the TPMS receiver 30 receives four tires FR, FL, RR and RL. Since it is easy to recognize whether the FR, FL, RR, RL has been replaced, only the tire (FR, FL, RR, RL) whose position has been changed or replaced can be auto run and auto location.

The TPMS configured as described above performs auto running and auto location by the following control method.

9 is a control flowchart of TPMS auto running and auto location according to the second embodiment of the present invention.

First, when the tire is removed, the height sensor, which is a detection sensor, detects a change in the garage (S310).

If the garage is higher than the threshold at any one or two of the four tires, the vehicle detects this and stores state information indicating that the garage has risen to the maximum (S320).

If the height change of the tire exceeds the limit (340) when the keyon or the driving (S330), the TPMS receiver instructs the performance of auto running and auto location during driving (S350).

On the other hand, if the height change of the tire does not exceed the threshold when the keyon or the driving (S330) (360), the TPMS receiver prohibits the performance of auto running and auto location during driving (S370).

Therefore, in the first embodiment, since the removal of the wheel is easily detected by the bidirectional acceleration sensor and the control logic as the sensor 20, and the height sensor and the control logic as the sensor 20 'in the second embodiment, On the basis of this, only the tires (FR, FL, RR, RL) whose position is changed or replaced can perform auto running and auto location.

Although the present invention has been described in detail by using the preferred embodiment, the scope of the present invention is not limited to the specific embodiment, it should be interpreted by the appended claims. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

1 is a schematic diagram schematically showing the configuration of a general tire pressure monitoring system.

2 is a schematic diagram showing an interconnection structure between a TPMS sensing module and a TPMS receiver according to a first embodiment of the present invention.

3 is an exploded view showing the installation structure of the TPMS sensing module.

4 is a front view and a side view of a sensor mounted in the TPMS sensing module shown in FIG.

5 is a side view illustrating an example of detachment of a tire.

6 is a control flowchart of TPMS auto running and auto location according to the first embodiment of the present invention.

7 is a schematic diagram illustrating an interconnection structure between a sensor and a receiver according to a second embodiment of the present invention.

8 is a schematic diagram schematically showing the structure of a sensor according to a second embodiment of the present invention.

9 is a control flowchart of TPMS auto running and auto location according to the second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10-wheel 20-TPMS sensing module

21,21 '-Sensor 22-Switch

23-Memory 30-TPMS Receiver

40-body FR, FL, RR, RL-tire

Claims (8)

TPMS sensing module installed on the wheel to detect the air pressure and temperature of the tire; A TPMS receiver receiving air pressure and temperature information of each tire through the TPMS sensing module and determining whether the tire is normal; Tire pressure monitoring system, characterized in that the TPMS sensing module is provided with a sensor for detecting the detachment of the tire. The method of claim 1, The detection sensor, A tire air pressure monitoring system, characterized in that configured to measure the rotational direction of the tire and the acceleration in the direction in which the tire is inclined when the tire is removed. The method of claim 2, The detection sensor, A tire pressure monitoring system, characterized in that for measuring the acceleration when the removed tire is tilted by gravity. TPMS sensing module installed on the wheel to detect the air pressure and temperature of the tire; A TPMS receiver receiving air pressure and temperature information of each tire through the TPMS sensing module and determining whether the tire is normal; Including a detection sensor installed in the vehicle body to detect the change in the height of the tire detachment, characterized in that configured to be recognized as a change or replacement of the tire when the height of the tire mounted portion is higher than the limit Tire pressure monitoring system. The method of claim 4, wherein The detection sensor, Tire pressure monitoring system, characterized in that the height sensor comprises a switch provided to receive power when the maximum garage height, and a memory for storing the data of the maximum garage height at the contact of the switch. Measuring an acceleration in a direction in which the tire is inclined when a tire is removed by a detection sensor provided in a TPMS sensing module; If the detected tire acceleration is greater than or equal to a reference value, recognizing the tire acceleration and detachment information and storing the tire acceleration information in a register; And transmitting the stored information to the TPMS receiver to perform only auto running and auto location of the corresponding tire, wherein the auto running and auto location implementation method of the tire pressure monitoring system is configured. The method of claim 6, The TPM sensing module, When the tire is removed, if the tire acceleration value corresponds to the reference value, it is determined that the tire is replaced, and the flag value is stored as '1'. Save as '0', The TPMS receiver, If the flag value transmitted from the TPM sensing module to the TPM receiver at key-on is '0', the execution of auto running and auto location is prohibited, and if the flag value sent to the TPM receiver is '1', auto running for the tire. And auto-location to perform auto-location and auto-location of the tire pneumatic monitoring system. Recognizing a change or replacement of a tire when the garage of each tire mounting portion is higher than a threshold; Storing information about the detachment of the tire; And transmitting the stored information to the TPMS receiver to perform only auto running and auto location of the corresponding tire.

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