KR102478506B1 - Safety Parking method for Vehicle having Parking Integrated Caliper Type Brake System - Google Patents

Abstract

The present invention is an invention for improving the safety of a parking brake of a vehicle, and more particularly, an electronic stability control (ESC) of a vehicle equipped with a parking integrated caliper (PIC) type parking brake A technology for improving the safety of a parking brake by receiving at least one piece of information from various devices installed in a corresponding vehicle through a system and calculating the temperature of the parking brake disc from the received information.

Description

Safety Parking Method for Vehicle Having Parking Integrated Caliper Type Brake System}

The present invention is an invention for improving the safety of a parking brake of a vehicle, and more particularly, an electronic stability control (ESC) of a vehicle equipped with a parking integrated caliper (PIC) type parking brake A technology for improving the safety of a parking brake by receiving at least one piece of information from various devices installed in a corresponding vehicle through a system and calculating the temperature of the parking brake disc from the received information.

In general, parking brake structures applied to automobiles are largely classified into DIH (Drum In Hat) type and PIC (Parking Integrated Calipr) type. Recently, the application of the PIC parking brake type, which is advantageous in cost and weight, is gradually expanding, instead of the DIH parking brake structure, from small cars to medium and large cars.

The PIC is the same as the operating principle of the conventional floating caliper during normal braking by the brake pedal, but a mechanical structure capable of demonstrating the parking brake performance is built inside the caliper, so it can also act as a parking brake by cable operation. It is a caliper with 1 shows a conventional PIC parking brake structure.

However, in the conventional PIC-type caliper, after repeated braking through the main brake system, when the driver leaves the stopped vehicle by operating the parking brake while the brake disc is thermally expanded, after the disc cools down over time, There was a problem in that a gap (GAP) was generated between the disc and the friction material, and the initial intended parking brake performance was reduced. 2 is a diagram showing a case in which the parking brake is operated in a disk thermal expansion state, and FIG. 3 shows a case in which a gap (GAP) is generated between the friction material after the disk is cooled.

The problem of the PIC-type caliper of the prior art as described above is, if the auto lever operates the parking brake in a situation other than the P stage, and at this time, when the vehicle parking place has a slight slope (a slope that the driver does not recognize well) degree) can become more serious. In addition, since there is no movement of the vehicle immediately after parking the vehicle to which such a PIC type caliper is applied, the driver who recognizes it as a parked situation may depart from the vehicle, but as the parking brake performance decreases after a predetermined time, the vehicle This can flow and cause unexpected accidents.

In order to solve the above problems, a technology for reducing the degree of occurrence of the problem by applying a friction material with a relatively high friction coefficient to the brake structure has been developed. can cause drawbacks.

In order to fundamentally solve the above problem, Patent Registration No. 10-0946852 proposes a technical configuration that calculates a deceleration mode according to the thermal expansion of a disk through a wheel speed signal of an ABS vehicle.

However, since the above technology estimates the deceleration mode only with the WSS (wheel speed signal) of the ABS vehicle, there is a limit to accurately estimating the hot state between the disk and the friction material by the actual vehicle deceleration.

In addition, although there is a concept of heat generation mode accumulation through recovery by braking operation, the cooling effect by atmospheric flow according to driving time without braking has not been considered. While it is greatly affected by the physical/chemical state according to, there was a disadvantage that there was a limit in deriving accurate estimation results because such environmental conditions were not taken into consideration.

The present invention was created to solve the above problems,

At least one information is received from various devices installed in the vehicle through the Electronic Stability Control (ESC) system of the vehicle equipped with the parking brake of the Parking Integrated Caliper (PIC) type, and the received An object of the present invention is to promote the safety of a brake system according to accurate disk temperature estimation by calculating the temperature of the parking brake disk from information.

The present invention for achieving the above object,

In the safe parking method of a vehicle through an electronic driving stabilization control (ESC) system of a vehicle equipped with a parking brake of the parking integrated caliper (PIC) type, (a) vehicle speed by receiving a wheel speed signal (WSS) from a wheel speed sensor obtaining; (b) determining vehicle braking by receiving a pressure signal from a pressure sensor of the ESC system; (c) estimating a temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals; and (d) determining the parking risk by determining whether the estimated temperature change of the parking brake disk exceeds a preset threshold.

Here, the step of estimating the temperature change of the parking brake disk by cumulatively summing the received vehicle speed and pressure signals is performed by matching the disk temperature change mapping table according to the preset vehicle speed and deceleration.

In addition, obtaining a traveling time of the vehicle; and estimating a temperature change of the parking brake disk by matching the received vehicle speed and travel time with a disk temperature change mapping table according to preset vehicle speed and travel time.

The method may further include maintaining the vehicle stop by providing hydraulic pressure of the ESC system to wheels when determining the parking risk.

In addition, it is characterized in that it further comprises the step of maintaining the performance of the steps (a) to (d) for a preset waiting time when the vehicle is turned off (IGN-OFF).

In addition, when determining the parking risk level, further comprising generating and outputting a warning message, transmitting the warning message to a communication terminal installed in the vehicle; and transmitting, by the communication terminal, the warning message to a mobile terminal possessed by the user through a communication network.

Furthermore, the step of receiving and accumulating the brake pedal actuation signal (BLS) is further included, and the step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals is applied with the accumulated BLS as a weight. characterized by being

The step of estimating the temperature change of the parking brake disk by accumulating and summing the received vehicle speed and pressure signals is characterized in that the accumulated outside temperature is applied as a weight. as

The method may further include determining a front/rear wheel load state of the vehicle by receiving a height signal from a height sensor, and estimating a temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals. Characterized in that the front / rear wheel load condition is applied as a weight,

In addition, the step of receiving any one of the sensor signal generated from the rain sensor or the wiper operation signal generated from the wiper, and estimating the temperature change of the parking brake disc by accumulating and summing the received vehicle speed and pressure signals Is characterized in that the value of any one of the received sensor signal of the rain sensor or the operation signal of the wiper is applied as a weight,

Finally, the step of estimating the temperature change of the parking brake disk by accumulating and summing the received vehicle speed and pressure signals includes receiving the gradient of the vehicle from the longitudinal G sensor, wherein the gradient of the vehicle is applied as a weight. characterized by

Through the above configuration, the safe parking method of the parking integrated caliper type parking brake vehicle of the present invention provides the following characteristic advantages.

1) By estimating and calculating the temperature of the parking brake disc of a parking integrated caliper type parking brake vehicle based on dozens of pieces of information through various devices of the vehicle during driving or after parking, the parking integrated caliper type parking brake is applied When parking in a vehicle There is an advantage of preventing possible risk factors in advance, and through this, there is an effect of improving the quality of the vehicle.

2) Based on the information received from the wheel speed sensor, pressure sensor, brake pedal, outside air temperature sensor, rain sensor or wiper, height sensor, and bell G sensor from the ESC system installed in the vehicle, the temperature of the parking brake disc is estimated and the risk By configuring to prevent, the advantage of not requiring a separate additional component and thus cost reduction is provided, and the brake system according to accurate disk temperature estimation by using information received from multiple devices to estimate the disk temperature. has the effect of improving the safety of

1 shows a conventional PIC parking brake structure.
2 is a diagram illustrating a case in which the parking brake operates in a disk thermal expansion state.
3 shows a case where a gap (GAP) is generated between the friction material after the disk is cooled.
4 schematically shows a system configuration of a safe parking method for a parking-integrated caliper-type parking brake vehicle according to a preferred embodiment of the present invention.
5 shows a system configuration in which a warning message is delivered to a driver according to the movement of a vehicle parked on a slope after the driver leaves the driver's seat.
6 is a flowchart showing a process of calculating the temperature of a parking brake disk according to a preferred embodiment of the present invention.
7 is a flowchart illustrating a process of managing parking safety by controlling an ESC system of a vehicle based on the calculated temperature of a parking brake disk according to a preferred embodiment of the present invention.

Hereinafter, prior to describing the technical configuration of the present invention in detail, terms or words used throughout this specification and claims should not be understood as being construed as being limited to common or dictionary meanings, and the terms or The words are described based on the 'principle that the inventor can appropriately define the concept of terms in order to explain his or her invention in the best way', and be interpreted as meanings and concepts consistent with the technical idea of the present invention. It should be. Therefore, the embodiments described in this specification and the technical configurations shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so they cannot be replaced at the time of this application. It should be understood that there are many possible equivalents and variations. In addition, terms used in this specification are used for the purpose of easily understanding specific embodiments, and are not intended to limit the present invention. Elements described in the singular form on this specification should be understood to include plural forms unless otherwise specified.

The present invention is an invention for promoting the safety of a parking brake system in a vehicle to which a Parking Integrated Caliper (PIC) type parking brake and an Electronic Stability Control (ESC) system are applied, and a wheel speed sensor ( 20), pressure sensor 11, brake pedal 30, outside temperature sensor 40, rain sensor or wiper 60, height sensor 50, species G sensor 70, etc. By estimating the temperature of the brake disc of the brake system, the safety of the brake system according to the accurate disc temperature estimation is improved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 schematically shows a system configuration of a safe parking method for a parking-integrated caliper-type parking brake vehicle according to a preferred embodiment of the present invention.

As shown, the safe parking method of a parking integrated caliper type parking brake vehicle of the present invention is a parking integrated caliper (PIC: Parking Integrated Caliper) type parking brake and an electronic driving stabilization control (ESC, Electronic Stability Control) system applied vehicle Control is performed through the ESC system 10 provided in the ESC system 10, and various devices installed in the vehicle, for example, the wheel speed sensor 20, the brake pedal 30, and the outside temperature sensor ( 40), the rain sensor or wiper 60, the height sensor 50, the longitudinal G sensor 70, etc. receive information and based on this, it is configured to recognize the dangerous situation of the parking brake of the vehicle.

More specifically, the ESC system 10 estimates and calculates the temperature of the parking brake disc of the Parking Integrated Caliper (PIC) type based on the information received from the devices, and calculates the temperature of the estimated parking brake disc If it is determined that the temperature has risen beyond a preset threshold, a warning message is output so that the driver can recognize the vehicle condition, or the ESC actuator is operated to generate 4-wheel hydraulic pressure to maintain the vehicle braking state.

Devices providing information for estimating and calculating the temperature of the parking brake disc in the ESC system 10 are as follows. However, it is not limited to the devices listed below, and should be understood to include all devices in the related art that are installed in a vehicle or may be installed in the future that can provide the same information as the information described herein.

wheel speed sensor

The wheel speed sensor 20 (WSS, Wheel Speed Sensor) is a device installed on each wheel of a vehicle and outputting a wheel speed signal by detecting the rotational speed of the corresponding wheel as a change in the magnetic force line in the tone wheel and the sensor. Typically, the speed of the vehicle can be calculated through the wheel speed sensor 20 . Therefore, the ESC system 10 receives the wheel speed signal output from the wheel speed sensor 20 through association with the wheel speed sensor 20 and recognizes the speed or speed change rate of the vehicle, thereby accelerating or It is possible to determine whether or not to decelerate, and in response thereto, it can be reflected as a weight in the estimated calculation of the temperature of the parking brake disk.

brake pedal

The brake pedal 30 is a means through which the driver's manipulation for operating the brake system is directly transmitted, and the ESC system 10 connects with the brake pedal 30 to determine braking of the vehicle. It is made to receive an actuation signal.

In general, vehicle deceleration can be divided into braking deceleration by direct operation of the braking system and non-braking deceleration through engine braking. Since the temperature may rise, the brake pedal 30 operating signal (BLS: BRAKE LAMP SIGNAL) is received in conjunction with the brake pedal 30 and the number of braking is counted. Accordingly, the ESC may count the number of braking whenever the brake pedal 30 operation signal is received, and may reflect the counted number of braking as a weight in estimating the temperature of the brake disc.

pressure sensor

The pressure sensor 11 is a component included in the ESC system 10 and is configured to detect pressure applied to each wheel. In general, braking of a vehicle is not always performed with the same intensity, and braking is performed with different intensity according to situations (eg, road surface conditions, temperature, humidity, etc.) in which braking is performed. Therefore, it may be insufficient to accurately calculate the temperature of the brake disc only by counting the number of braking of the vehicle as described above.

Therefore, the ESC system 10 determines the braking intensity through the pressure of each wheel detected through the pressure sensor 11 included in the ESC system 10, and brakes to estimate and calculate the temperature of the brake disc. Accuracy of the calculated temperature value of the brake disc may be improved by reflecting the strength as a weight (for example, as the braking strength increases, the temperature of the parking brake disc increases).

In addition, the pressure sensor 11 may be used together with the brake pedal 30 to determine the braking state of the vehicle.

Although it is possible to achieve some degree of accuracy just by calculating the temperature of the parking brake disc through the ESC system 10 after receiving the number of times and braking intensity as described above, heat is usually generated through friction with the brake disc. Since the friction material of the caliper used is a system with strong chemical properties that operates very sensitively to vehicle load, driving conditions, and ambient temperature/humidity, it is desirable to receive and reflect additional information from the following devices for more accurate prediction.

outside temperature sensor

The outside air temperature sensor 40 is a component provided to detect the ambient temperature of the vehicle, and the ESC system 10 is connected to the outside air temperature sensor 40 to detect the surroundings of the vehicle when braking of the vehicle is performed. By receiving the outside air temperature, it is reflected as a weight in calculating the temperature of the parking brake disc.

height sensor

The height sensor 50 is a component that recognizes the load condition of the front and rear wheels of the vehicle by detecting the height of the vehicle through the suspension link height sensor 50 mounted on the air suspension vehicle, and the ESC system ( 10) receives the load condition of the front/rear wheels of the vehicle from the height sensor 50 and reflects it as a weight in calculating the temperature of the brake disc.

rain sensor or wiper

The rain sensor is a sensor that detects a rainy weather situation, and the wiper is a device that operates in rainy weather.

In general, physical properties of a friction material in contact with a parking brake disc are greatly affected in driving conditions in rainy weather. Accordingly, the ESC system 10 detects the state of the vehicle driving environment through the operation information of the rain sensor or the wiper 60 and reflects it as a weight in calculating the temperature of the brake disc.

species G sensor

The vertical G sensor 70 is a sensor that detects the inclination of the vehicle. The inclination of the vehicle may increase or decrease the load applied to the parking brake disc during braking, and this effect may greatly affect the temperature rise of the brake pad.

Accordingly, the ESC system 10 receives tilt information of the corresponding vehicle in association with the type G sensor, and reflects it as a weight in calculating the temperature of the brake disc.

5 shows a system configuration in which a warning message is delivered to a driver according to the movement of a vehicle parked on a slope after the driver leaves the driver's seat. The embodiment shown in FIG. 5 assumes a case where motion of a parked vehicle occurs through the wheel speed sensor 20 among the various devices described above.

As described above, the ESC system 10 is configured to estimate and calculate the temperature of the parking brake disk through information received from various devices installed in the vehicle, and thus estimate the temperature of the parking brake disk through the ESC system 10 As a result, it is intended to provide a warning message informing the driver of a dangerous situation to the driver of the vehicle and to prevent a dangerous situation due to abnormal operation of the parking brake.

As shown in FIG. 5, the ESC system 10 is a component for providing a warning message, and a display device installed in the vehicle (eg, a cluster system, AVN, etc.) through a communication terminal 80 installed in the vehicle. ) or a communicable portable terminal 90 (eg, a smart phone, a mobile phone, etc.) possessed by the user, and configured to prevent a dangerous situation due to abnormal operation of the parking brake, It is made to operate the 4-wheel hydraulic pressure of the ESC system 10.

The configuration as described above provides a warning message notifying the driver of a dangerous situation to a driver separated from the vehicle by a predetermined distance, and at the same time provides an additional hydraulic pressure to the parking brake disc, thereby preventing unwanted movement of the vehicle. This is a configuration for safety.

In general, the temperature of the lower part of the vehicle may further increase for a predetermined time (eg, 5 minutes) after stopping than during driving. This phenomenon is because the cooling effect of the air flow works while the vehicle is running, but after stopping, the heat generated from the engine and muffler stays in the limited space under the vehicle and transfers the heat through convection for a predetermined time.

Therefore, in the case of a vehicle parked after driving, the temperature of the parking brake disc starts to rise gradually in a state where the driver gets off, and after some time, exists in an expanded state by the temperature exceeding the above-mentioned threshold value, and again after a predetermined time After cooling, it may be reduced and a gap may occur with the parking brake friction material.

As a result, in this case, since the driver is located at a distance from the vehicle, when the vehicle is parked on an incline, a dangerous situation may be caused due to unwanted vehicle rolling.

In particular, even for a vehicle to which the above-described safe parking method for a parking-integrated caliper-type parking brake vehicle of the present invention is applied, when the driver turns off the ignition of the vehicle, the operation of the ESC system 10 is stopped to output a warning message or Since the operation of the 4-wheel hydraulic system was not performed, the dangerous situation could not be prevented.

In order to solve this situation, the safe parking method of the parking integrated caliper type parking brake vehicle of the present invention is the ESC system 10 for a preset waiting time (eg, 5 minutes) even after the vehicle is turned off (IGN-OFF) It may be configured to stand by in this operating state, for example, so that power is applied to the ESC system 10 from a vehicle battery. Therefore, even if the driver gets off the vehicle with the engine turned off and the vehicle moves while being in a position away from the vehicle, the ESC system 10 activates the actuator to increase the hydraulic pressure of the four wheels, thereby increasing the vehicle's You can keep your vehicle stationary.

Meanwhile, the warning message output from the ESC system 10 is transmitted to the communication terminal 80 installed in the vehicle, and from the communication terminal 80 to the mobile terminal 90 possessed by the user through the communication network.

For example, the ESC system 10 recognizes a situation in which the corresponding vehicle is moving in a state where the brake pedal 30 signal is not received after the ignition of the vehicle is turned off (IGN-OFF) (for example, a wheel pressure increase phenomenon occurs). occurs), a warning message is transmitted to the communication terminal 80 (for example, infotainment system (in-vehicle communication-based system)) provided in the vehicle, and the communication terminal 80 is connected in advance to the vehicle user ( A signal may be sent to the driver's smart phone communication unit so that a warning message capable of notifying that the vehicle is in an emergency may be output.

If the vehicle user is linked with the user's in-home communication-based system and the IoT function, vehicle status information may be transmitted through the mobile phone and the in-home communication system.

Hereinafter, specific embodiments and formulas for estimating and calculating the temperature of the parking brake disc will be described with a more detailed description.

The biggest technical feature of the present invention lies in setting the deceleration mode. This is because the deceleration mode affects the change in disk temperature. And since this deceleration mode differs according to the specifications of the vehicle, it is an item determined through evaluation and tuning in the vehicle development stage.

In the vehicle development stage, evaluation is performed in a dynamo environment to measure brake disc temperature changes. At this time, the initial speed of the vehicle is set and the disc temperature change is checked through repeated braking for each deceleration. The deceleration mode of the vehicle can be detected through a signal from the pressure sensor 11 built into the ESC system 10.

The deceleration state of the vehicle is divided into 1 to N stages according to the logic development concept.

For example, if the deceleration state is divided into modes at 0.1g deceleration intervals, the maximum deceleration is usually judged to be 1.0g, so it is divided into 10 deceleration state modes. If the deceleration state is divided at 0.05g intervals, a total of 20 It is classified as a deceleration state mode.

The number of N can be adjusted according to the logic development concept, and it can be determined that the larger the size of N, the more precise prediction is possible. Set the low deceleration mode to 1 and define high deceleration as the number mode increases. (Mode N can be regarded as the maximum deceleration mode)

During braking in each of these deceleration modes, the change in temperature rise of the parking brake disc may be different. In the case of low deceleration or high deceleration, it can be seen that the degree of disc temperature change is different.

In addition, the temperature change of the parking brake disk by the deceleration mode may also vary depending on the initial vehicle speed. The disc temperature change when braking at 0.1g deceleration at 10kph per second and the disc temperature change when braking at 0.1g deceleration at 100kph per second can be different. Accordingly, the vehicle speed category of the M stage may be determined by dividing the vehicle into a predetermined vehicle speed unit, such as an initial vehicle speed of 10 kph or 5 kph.

In summary, the disc temperature change value can be basically mapped and determined under the condition that the initial speed and deceleration of the vehicle are matched. Table 1 shows a mapping table of disk temperature change values (d11, d21, ...) according to vehicle speed and deceleration.

[Table 1]

Just as the parking brake disk elevation change was mapped to the basic data values for each vehicle speed and braking deceleration, if the parking brake disk temperature drop change (cooling) is organized in the same way under the vehicle speed and driving time condition, the parking brake disk temperature drop change mapping as shown in Table 2 DATA (c11,c21...) can be displayed. As described above, this is because the parking brake disc is normally cooled through convection according to the surrounding air flow in a non-braking state while driving.

[Table 2]

Considering the sufficient safety factor of the rear brake disc while driving, the reference threshold temperature at which the problem is concerned is Z(SPEC), and the number of times A _MN occurred while driving under each condition in Table 1 above, and each in Figure 4 If the number of occurrences in the condition is B _MN ,

The number of occurrences of the d ₁₁ condition becomes the value of A ₁₁ , and the number of occurrences of the c ₁₁ condition becomes the value of B ₁₁ .

Then, as in Equation 1, the basic disk temperature estimation formula can be applied.

[Equation 1]

The basic logic of estimating the disk temperature of Equation 1 may be applied by assigning a weight according to the driving environment condition of the vehicle. The formula for estimating with the number of braking times and driving time for each basic mode in a cold state (room temperature condition) configures the logic according to the concept of Equation 1, and the disk temperature rise due to the vehicle's outside temperature information and continuous braking is It can be weighted in the basic concept and reflected separately. For example, in the case of continuous repetitive braking (usually 3 to 5 consecutive times), weight is given to the disk temperature increase mode in Table 1, and in the case of cold winter weather, weight is given to the disk temperature decrease mode in Table 2. can do.

For example, when the temperature rise is 100% under the specific conditions of the basic mode in Table 1, if a 150% temperature rise occurs in the continuous braking mode, a weight of 1.5 can be assigned.

In addition, since the rear brake braking inertia may be different depending on the vehicle weight (load), a vehicle equipped with an advanced suspension detects the change in load through height sensor information and assigns an appropriate weight. can be configured.

In addition, it is possible to assign a weight in an environmental condition on a rainy day (humid situation) through the operation information of the rain sensor or the wiper 60. In addition, when a downhill or uphill braking condition is recognized through the vertical G sensor 70, a load movement that is changed compared to the existing load movement amount may occur, and thus weights may be assigned according to the braking state of the slope road.

In this way, when the cumulative value of the index weighted according to each vehicle option exceeds the standard temperature threshold (SPEC), a warning message is output (DISPLAY) through the cluster installed in the vehicle so that the driver can recognize it, or the ESC system (10 ) to operate the actuator to control the hydraulic pressure of the four wheels, thereby maintaining the stopped state of the vehicle.

P ₁ , P ₂ , P ₃ , . . . … , P _J is defined, and the weights involved in the temperature drop are Q ₁ , Q ₂ , . . . … , When defined as Q _J , (here, the weights refer to weights derived from information received from various devices installed in the vehicle described above), the cumulative value of all sums of the estimated values of the parking brake disc temperature including the weights for each option It is made to display a warning when the temperature of the parking disk becomes greater than the threshold value, and this process can be expressed by Equation 2 below.

[Equation 2]

Hereinafter, the ESC system 10 of the vehicle based on the process of calculating the temperature of the parking brake disk using the above tables of Tables 1 and 2 and the equations of Equations 1 and 2 and the calculated temperature of the parking brake disk to describe the process of managing parking safety by controlling

6 is a flowchart showing a process of calculating the temperature of a parking brake disk according to a preferred embodiment of the present invention, and FIG. 7 is a vehicle ESC based on the calculated temperature of a parking brake disk according to a preferred embodiment of the present invention. It is a flowchart showing the process of controlling the system 10 to manage parking safety.

As shown in FIG. 6, when the ignition of the first vehicle is turned on (IGN-ON), the ESC system 10 receives the wheel speed signal output from the wheel speed sensor 20 in order to first check the vehicle speed. to recognize the speed or speed change rate of the vehicle, and through this, it is determined whether the vehicle is accelerating or decelerating (S001).

Thereafter, the ESC system 10 communicates with the brake pedal 30 to determine whether the brake pedal 30 operation signal BLS is output (S002). As described above, vehicle deceleration is generally divided into braking deceleration by direct operation of the braking system and non-braking deceleration by engine braking. For this purpose, it is determined whether the output of the BLS is made. Here, the ESC system 10 may count the number of braking each time the brake pedal 30 operation signal is received, and reflect the counted number of braking as a weight in estimating the temperature of the brake disc. .

On the other hand, when the ESC system 10 determines that the BLS signal is output in step S002, it checks the operation of the pressure sensor 11 (S003) and receives a deceleration signal from the pressure sensor 11 ( S004).

The ESC system 10 determines the braking strength through the pressure of each wheel detected through the pressure sensor 11 included in the ESC system 10, and uses the braking strength to estimate and calculate the temperature of the brake disc. By reflecting it as a weight, it is possible to improve the accuracy of the calculated temperature value of the brake disc, and a pressure signal can be used to distinguish the braking state of the vehicle together with the brake pedal 30.

The ESC system 10 determines the current state as the temperature increase mode of the parking brake disk based on Table 1 according to the vehicle speed and deceleration received through the steps S001 and S004 (S005), and the following additional Perform weight judgment.

First, the ESC system 10 determines whether the number of brakes counted based on the BLS signal in step S002 exceeds a preset threshold (S006), and if the number of brakes exceeds the preset threshold, sets a continuous brake weight It is reflected as a weight in the temperature calculation of the brake disc (S007).

In addition, the ESC system 10 determines whether the height of the front/rear wheels of the vehicle exceeds a preset threshold based on the height sensor signal (S008), and if the height of the front/rear wheels of the vehicle exceeds the preset threshold, The front/rear wheel load of the vehicle is reflected as a weight in calculating the temperature of the brake disc (S009).

In addition, the ESC system 10 determines whether the slope load of the vehicle exceeds a preset threshold value (uphill slope situation) based on vehicle slope information acquired by receiving the longitudinal G sensor 70 signal (S010). ), and when the slope load of the vehicle exceeds a preset threshold value, the slope load of the vehicle is reflected as a weight in calculating the temperature of the brake disc (S011).

On the other hand, if it is determined that the BLS signal is not output in step S002, the ESC system 10 receives the driving time of the vehicle from the control unit (eg, BCM, cluster module, etc.) of the vehicle (S012), Accordingly, based on Table 2, the current state is determined as the temperature lowering mode of the parking brake disk (S013), and the following additional weight determination is performed.

First, the ESC system 10 determines whether the current outdoor temperature is lower than a preset threshold based on the outdoor temperature information obtained by receiving the outdoor temperature sensor 40 signal (S014), and determines the current outdoor temperature If is lower than the preset threshold value, the outside air temperature information is reflected as a weight in calculating the temperature of the brake disc (S015).

In addition, the ESC system 10 receives the rain sensor or wiper 60 signal and determines whether the sensor value of the rain sensor or the wiper operation value exceeds a preset threshold (S016), and the current rain sensor When the sensor value of or the wiper operation value exceeds a preset threshold (high humidity environment), the sensor value of the rain sensor or the wiper operation value is reflected as a weight in calculating the temperature of the brake disc (S017).

In addition, the ESC system 10 determines whether the slope load of the vehicle is smaller than a preset threshold value (downhill slope situation) based on the slope information of the vehicle obtained by receiving the signal from the longitudinal G sensor 70 (S018). ), and if the slope load of the vehicle is lower than the preset threshold value, the slope load of the vehicle is reflected as a weight in calculating the temperature of the brake disc (S019).

When the temperature rise and fall modes and weights of the parking brake disk are determined through the steps S002 to S019, the ESC system 10 calculates the temperature of the parking brake disk based on Equations 1 and 2 based on the determined parameters Estimation is calculated (S020). 6 has been described based on the rear parking brake disk, but it should be noted that it is not limited thereto.

When the estimated calculation of the temperature of the parking brake disk is completed, the ESC system 10 compares the calculated value with a preset threshold value (S101), and if it is determined that the calculated value exceeds the preset threshold value, the following performs safety control, and these processes are described below with reference to FIG. 7 .

When it is determined that the parking brake temperature value calculated in step S101 exceeds a preset threshold, the ESC system 10 first determines whether the ignition of the corresponding vehicle is OFF (S102), and the ignition of the corresponding vehicle is OFF. If not, a warning message is output (S103) and the warning message is displayed through an in-vehicle display unit (eg, cluster system) (S104).

In the step S102, when the ESC system 10 determines that the ignition of the corresponding vehicle is OFF, the ESC system 10 sets a preset waiting time (S105) and performs the following steps during the waiting time (S106).

First, the ESC system 10 receives the wheel speed signal WSS from the wheel speed sensor 20 (S107), and determines whether the wheel speed exceeds a threshold value after turning off the vehicle (S108). Here, if it is determined that the wheel speed exceeds the threshold value even after the vehicle is turned OFF, it may be determined that the corresponding vehicle has moved.

Therefore, in the step S108, if it is determined that the wheel speed exceeds the threshold value even after the vehicle is turned off, the hydraulic valve of the ESC system 10 is operated (S109) to prevent the vehicle from moving, and the WSS becomes 0 to prevent the vehicle from moving. The hydraulic valve is operated until it stops (S110). As a result, when unintended vehicle movement occurs due to the expansion and contraction of the heated parking brake disk after the vehicle starts and stops, by performing the above steps S107 to S110, it is possible to temporarily secure the safety of the vehicle. can

At the same time, the ESC system 10 operates the communication terminal 80 installed in the vehicle (S111) and transmits a warning message to the communication terminal 80 (S112). The communication terminal 80 determines whether a warning message is received from the ESC system 10 (S113), and when the warning message is received, the communication terminal 80 is contactable by a vehicle user (driver) linked in advance. A means, for example, sends a signal to the user's smart phone communication unit or the user's home communication terminal so that a warning message capable of notifying that the vehicle is in an emergency is output (S114, S115), and the vehicle user communicates with the mobile phone and the home The vehicle state information is recognized through the system so that feedback thereof can be made (S116).

Although the preferred embodiment of the safe parking method of the parking integrated caliper type parking brake vehicle of the present invention has been described in detail above, this is merely a specific example to help understanding of the present invention, and limits the scope of the present invention It's not what I want to do. In addition to the embodiments disclosed herein, it is obvious to those skilled in the art that other modifications based on the technical idea of the present invention can be implemented.

10: ESC system
11: pressure sensor
20: wheel speed sensor
30: brake pedal
40: outdoor temperature sensor
50: height sensor
60: rain sensor or wiper
70: species G sensor
80: communication terminal
90: mobile terminal

Claims (12)

In the safe parking method of a vehicle through an electronic driving stabilization control (ESC) system of a vehicle equipped with a parking brake of the parking integrated caliper (PIC) type,
(a) obtaining a vehicle speed of the vehicle by receiving a wheel speed signal (WSS) from a wheel speed sensor;
(b) determining vehicle braking by receiving a pressure signal from a pressure sensor of the ESC system;
(c) estimating a temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals; and
(d) determining the parking risk by determining whether the estimated temperature change of the parking brake disk exceeds a preset threshold; It is composed of,
The step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals,
In order to estimate the temperature rise change of the parking brake disc, the temperature rise change is estimated by a mapping table to which the disk temperature change value according to the vehicle speed and deceleration is mapped,
In order to estimate the temperature drop change of the parking brake disc, the driving time of the vehicle is acquired, and the temperature drop change is estimated by a mapping table to which the disk temperature change value according to the vehicle speed and driving time is mapped. Safe parking method of type parking brake vehicle.
delete delete According to claim 1,
maintaining the vehicle stop by providing hydraulic pressure of the ESC system to wheels when determining the parking risk;
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that it further comprises.
According to claim 1,
Maintaining the performance of the steps (a) to (d) for a preset standby time when the vehicle is turned off (IGN-OFF);
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that it further comprises.
According to claim 1,
generating and outputting a warning message when determining the parking risk;
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that it further comprises.
According to claim 6,
When determining the parking risk, the step of generating and outputting a warning message,
Transmitting a warning message to a communication terminal installed in the vehicle; and
transmitting, by the communication terminal, a warning message to a portable terminal possessed by a user through a communication network;
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that it further comprises.
According to claim 1,
receiving and accumulating the brake pedal operation signal (BLS);
Including more,
The step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals,
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that the accumulated BLS is applied as a weight.
According to claim 1,
Receiving an outdoor temperature from an outdoor temperature sensor;
Including more,
The step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals,
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that the accumulated outside temperature is applied as a weight.
According to claim 1,
determining a front/rear wheel load state of the vehicle by receiving a height signal from a height sensor;
Including more,
The step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals,
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that the front / rear wheel load condition of the vehicle is applied as a weight.
According to claim 1,
Further comprising the step of receiving any one of the sensor signal generated from the rain sensor or the wiper operation signal generated from the wiper,
In the step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals, the value of any one of the received sensor signal of the rain sensor or the operation signal of the wiper is applied as a weight Integrated parking type How to safely park a caliper type parking brake vehicle.
According to claim 1,
receiving an inclination of the vehicle from the longitudinal G sensor;
Including more,
The step of estimating the temperature change of the parking brake disc by cumulatively summing the received vehicle speed and pressure signals,
A safe parking method for a parking integrated caliper type parking brake vehicle, characterized in that the gradient of the vehicle is applied as a weight.

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