KR100599472B1 - Brake overheating warning system using electronic brake control system - Google Patents

Abstract

The present invention relates to a brake device overheat warning system using an electronically controlled brake system, using a wheel speed sensor and an external temperature sensor in a vehicle equipped with an ABS (antilock brake system) or a vehicle equipped with an ETCS (engine control system). The present invention relates to a brake device overheat warning system using an electronically controlled brake system that prevents accidents due to brake rupture by actively warning a driver of a brake overheating condition without applying an externally mounted sensor.

ABS, TCS, ETCS

Description

Brake overheating warning system using electronic brake control system

1 is a block diagram of a conventional brake overheat prevention device.

2 is a block diagram of a brake apparatus overheat warning system using an electronically controlled brake system according to an embodiment of the present invention.

3 is an operational flowchart of a brake system overheat warning system using the electronic control brake system according to the configuration of FIG.

Figure 4 is a block diagram of a brake device overheat warning system using an electronically controlled brake system according to another embodiment of the present invention.

FIG. 5 is an operational flowchart of a brake device overheat warning system using the electronically controlled brake system according to the configuration of FIG. 4; FIG.

* Description of the main parts of the drawings *

10: sensing unit 11: wheel speed sensor

12: external temperature sensor 13: brake sensor

14: parking brake sensor 20: control unit

30: warning part 31: Etax

32: warning light or warning sound generating device 40: control unit

41: wheel speed sensor 42: external temperature sensor

43: brake sensor 44: parking brake sensor

45: throttle position sensor 46: gear position sensor

50: control unit 60: warning unit

61: Etax 62: Warning light or warning sound generating device

The present invention relates to a brake device overheat warning system using an electronically controlled brake system, using a wheel speed sensor and an external temperature sensor in a vehicle equipped with an ABS (antilock brake system) or a vehicle equipped with an ETCS (engine control system). The present invention relates to a brake device overheat warning system using an electronically controlled brake system that prevents accidents due to brake rupture by actively warning a driver of a brake overheating condition without applying an externally mounted sensor.

ABS refers to a device that achieves the optimal braking effect by repeatedly locking and releasing the wheel without stopping the wheel (Anti-Lock) when braking on a slippery road or sudden braking, and ETCS is a TCS (Traction Control) System).

TCS is a low friction (snow road, ice road) or asymmetrical (one ice, the other asphalt) start or acceleration on the road to prevent excessive drift of the drive wheel (acceleration) to increase the acceleration performance, turning acceleration It is a safety device that improves the safety of steering by preventing under / over steering due to excessive lateral acceleration of city vehicles.

TCS is divided into ETCS (engine control system) to control engine torque and BTCS (brake control system) to control brake pressure, and FTCS is a combination of both methods.

ETCS adjusts the output torque of the engine to control the speed of the drive wheels to ensure acceleration and steering stability. At this time, the engine output is controlled by adjusting the throttle valve system to control the air volume or by adjusting the ignition timing or fuel injection amount.

In driving a vehicle, a braking device must be used essentially, but depending on the driver's habit or a terrain such as a mountainous area or a downhill road, the braking device may be used particularly frequently. In this case, overheating may occur in the braking devices (friction materials and discs). Overheating of the braking device is a serious danger to the driver.

Conventionally, in order to eliminate such a risk factor, a brake overheating is detected and a warning function is alerted to the driver, and the engine and gear shifting are actively performed. To this end, various vehicle conditions are based on telematics. You need sensors that can be identified.

The brake overheating prevention device using the telematics is used to prevent the brakes from being stuck due to excessive use of the brakes or the bursting of the bubbles due to the bubbles in case of driving a mountainous area or a road with severe roads during the hot summer season. A sensor signal receiver for receiving the detected state data from an external temperature sensor for detecting an external temperature of the vehicle, an altitude sensor for detecting a current elevation of the vehicle, and a brake sensor for detecting a brake operation state of the vehicle, and from the sensor signal receiver A control unit for determining an overheat state of the automobile brake based on the received state data, and receiving the state data from the control unit, sending the state data to a control center, and analyzing and transmitting the state data at the control center. Information data A received transmission unit, the guide information data received from the control center, which in made to include a data output for outputting the audio and / or image, and a brake is prevented that the rupture.

Description of the brake overheat prevention device using the telematics is described in detail in the Republic of Korea Patent Application No. 2002-0048428 (Title: brake overheat prevention device). However, the above-mentioned conventional apparatus has a problem that can cause an extremely dangerous large traffic accident in a hilly mountain area where communication with the control center is not made.

As another conventional invention for solving such a problem, an invention relating to a brake overheat prevention device and a method thereof is disclosed in Korean Patent Laid-Open No. 2004-0026833. The contents of the invention disclosed in Korean Patent Application Publication No. 2004-0026833 are briefly described with reference to FIG. 1.

1 is a block diagram of a brake overheat prevention device, the vehicle operation state detection device 100 is the engine speed that varies according to the change of the operation state of the vehicle, the altitude of the driving region, the outside temperature of the vehicle, the brake operation state of the driver and the vehicle shift Detect stages and the like. The engine control device 200 receives the engine speed, driving altitude, outside air temperature and the driver's brake operation state detected by the vehicle operation state detection device 100 and controls the operating state of the engine by a set program. The driver's brake operation status is output. The shift control device 300 receives a vehicle operation state signal detected and applied by the vehicle operation state detection device 100, outputs a predetermined control signal for controlling a shift stage of the automatic transmission, and shifts the current traveling vehicle. Output the stage.

The brake overheat prevention control device 400 receives the driver's brake operation state output from the engine control device 200 and the shift control device 300 and the shift stage of the driving vehicle to determine whether the brake is overheated, and thus the brake overheating is prevented. When it is determined, a predetermined warning signal is output, and the engine output reduction and the shift stage low speed shift request signal are output. The Extax 500 receives a predetermined warning signal output from the brake overheat prevention control device 400 and outputs a predetermined warning sound and a warning lamp lighting signal for warning the driver that the brake is overheated. The driving device 600 adjusts the engine output in synchronization with the control signals output from the engine control device 200, the shift control device 300, and the etax 400, and lights a warning sound and a warning lamp when the brake is overheated. , Shift the gear to the lower stage.

These devices, as described above, use signals for clusters to detect vehicle speed. In addition, a separate external temperature sensor and vehicle altitude sensor should be installed to understand vehicle information. However, in order to mount these separate sensors, an additional additional cost is required, and there is a problem in that an additional hardware check for a failure is required.

The present invention has been invented to solve the above problems, without using a separate external mounting sensor, by using the sensors already installed in the existing ABS mounting vehicle or ETCS mounting vehicle, actively warning the overheating state of the brake This aims to enhance the driver's safety.

The present invention provides a sensing unit including a wheel speed sensor, an external temperature sensor, and a brake sensor for identifying a brake operating state to achieve the above object; When the brake is operated according to the pressure of the wheel cylinder and heat is generated in the brake, it is determined whether the brake is overheated based on the signal for the measured value output from the sensing unit, and when the brake is overheated, a warning signal is determined. A control unit for outputting a; It is characterized in that it comprises a warning unit for operating the warning sound or warning light by receiving the warning signal of the control unit.

More specifically, the controller is characterized in that it is determined whether the brake is overheated in consideration of the pressure increase or pressure increase state of the wheel cylinder according to the locking of the wheel.

The present invention also includes a sensing unit including a wheel speed sensor, an external temperature sensor, and a brake sensor for identifying a brake operating state; An auxiliary sensing unit comprising a throttle position sensor and a gear position sensor; When the brake is operated according to the pressure increase of the wheel cylinder and heat is generated in the brake, it is determined whether the brake is overheated based on the signal for the measured value output from the sensing unit and the auxiliary sensing unit, and the brake is in an overheated state. A controller for outputting a warning signal when it is determined to be; It is characterized in that it comprises a warning unit for operating the warning sound or warning light by receiving the warning signal of the control unit.

More specifically, the warning unit is characterized in that the parking brake warning light of the cluster in common and flashing, and the sensing unit is added to the parking brake operation sensor, so that the control unit operates only when the parking brake is not activated. It features.

That is, the present invention is characterized in that it is easy to determine whether the brake is overheated by using the sensors used in the existing ABS-equipped vehicle or ETCS-equipped vehicle, so that the driver can know it.

Hereinafter, with reference to the accompanying drawings will be described through a preferred embodiment of the present invention.

2 and 3 schematically show the configuration and operation of the warning system according to an embodiment of the present invention.

The sensing unit 10 used in the present invention includes a wheel speed sensor 11, an external temperature sensor 12, and a brake sensor 13, and further includes a parking brake sensor 14 for determining whether the vehicle is in a parking state. It can be included as.

The wheel speed sensor 11 is used as it is used in a vehicle equipped with ABS. ABS-equipped vehicles have wheel speed sensors for system operation, so they do not require additional sensors.

The external temperature sensor 12 uses a pre-mounted general temperature sensor that is widely used in the air conditioning system of the vehicle.

The brake sensor 13 uses a sensor used to turn on the brake light when the brake pedal is stepped on, and the parking brake sensor 14 is also used to determine whether the parking brake is ON / OFF to turn on the parking brake light. Use a sensor.

After the sensing step S110 of operating the sensors to measure data, the signal for the measured value is transmitted to the controller 20. The controller determines whether the brake is overheated based on the measured values through the same process as shown in FIG. 2.

Referring to the determination process of the controller, first, the measured wheel speed value is compared with the set minimum wheel speed V1. At this time, when the value of the parking brake sensor is reflected, the ON / OFF state of the parking brake is also checked. (S120)

If the measured wheel speed value is greater than the set minimum wheel speed V1 and the parking brake is in the OFF state, temperature calculation logic is executed to calculate the expected brake temperature T1. The temperature calculation logic is performed by a program of a preset ECU (S130).

When the estimated brake temperature T1 is calculated, the T1 is compared with the preset temperature T set when the brake is overheated, and when T1 is larger than the T set and the external temperature measured by the external temperature sensor is greater than an arbitrary set temperature of 30 degrees. Sends a warning signal to the warning part. At this time, the arbitrary set temperature may be set differently according to the surrounding conditions such as climate and weather. (S140)

When a warning signal is input, the warning unit generates a warning sound or lights a warning light, and the warning light is effective to allow the parking brake light of the cluster to blink in common (S150).

 Therefore, it is preferable that the control unit is composed of an etax and a cluster.

In operation steps S120 to S160 of the control unit, a decompression or pressure-increasing state of the master cylinder for locking the wheel may be considered. When the ABS is activated, even if a brake sensor is signaled by the brake sensor, the master cylinder may be pressurized to prevent the wheels from locking, so that the brake may not actually be braked. Is to determine whether overheating.

The warning unit stops the operation when the T1 becomes smaller than 0.8 times T set or when the warning unit operation time exceeds 10 seconds.

Since the above values merely represent one embodiment for explaining the operation of the preferred warning system, the operating time of the warning unit may vary somewhat depending on the surrounding conditions of the vehicle. Therefore, the operation is not necessarily stopped only when T1 is 0.8 times or less than the T set, and does not necessarily stop the operation after 10 seconds of operation.

When the present invention is used in an ETCS-applied vehicle, it is possible to determine whether the brake is overheated by additionally including the measured values of the throttle position sensor 45 and the gear position sensor 46. Such a system is illustrated in FIGS. 4 and 5. Is shown. Figure 4 is a schematic diagram of the present invention, Figure 5 is an operational flow diagram showing the operation of the present invention.

The sensing unit 40 of FIG. 4 includes a wheel speed sensor 41, an external temperature sensor 42, a brake sensor 43, a parking brake sensor 44, a throttle position sensor 45, and a gear position sensor 46. It is composed of

The wheel speed sensor 41 uses the wheel speed sensor used in an ETCS applied vehicle as it is.

Since the temperature sensor 42, the brake sensor 43 and the parking brake sensor 44 are the same as described above, repeated description thereof will be omitted.

The values measured by the sensors are transmitted to the controller 50. The controller determines whether the brake is overheated based on the measured values through the same process as shown in FIG. 5.

Looking at the determination process of the control unit, it is first determined whether the ETCS is in operation and executes the subsequent steps only when the ETCS is not operated.

If the ETCS does not operate, check the on / off status of the parking brake and compare the wheel speed (S230), execute the temperature calculation logic (S240), compare the external temperature with the set temperature, calculate the calculated brake temperature, and set brake overheat. The step of comparing the temperature (S250), the warning sound and warning light operation step (S260), the warning sound and warning light operation stop step (S270) in turn, since the same steps as described above will be omitted repeated description.

When the driver detects an overheating condition of the brake, the driver can refrain from using the brake and replace the braking with the engine brake to prevent an accident.

The effects of the present invention are summarized as follows.

First, the ABS-equipped vehicle actively warns the driver of overheating of the brakes without installing a separate external sensor, thereby preventing safety accidents.

Second, since the basic sensor of the vehicle equipped with ABS is used as it is, the self-diagnosis of the ABS can be configured as an ADD ON system.

Third, since the operation state of the master cylinder by the operation of the ABS is considered, it is possible to determine whether overheating by accurately considering the braking state of the wheel.

Fourth, in an ETCS-equipped vehicle, it is possible to prevent safety accidents by actively alerting the driver to overheating of the brakes without installing an external sensor.

Fifth, since the parking brake of the cluster is used for displaying the overheating state of the brake, it is not necessary to add an additional device and is efficient.

Sixth, it is possible to determine whether overheating considering the operation of the parking brake, more accurate judgment is possible.

Claims (5)

delete delete A sensing unit 40 including a wheel speed sensor 41, an external temperature sensor 42, and a brake sensor 43 for identifying a brake operating state; An auxiliary sensing unit including a throttle position sensor 45 and a gear position sensor 46; When the brake operates by increasing the pressure of the wheel cylinder and heat is generated in the brake, it is determined whether the brake is overheated based on the signal for the measured value output from the sensing unit 40 and the auxiliary sensing unit. A controller 50 for outputting a warning signal when it is determined that the battery is overheated; Brake device overheat warning system using an electronically controlled brake system comprising a warning unit for receiving a warning signal of the control unit 50 to operate a warning sound or a warning light. 4. The brake system overheat warning system according to claim 3, wherein the warning unit (60) flashes the parking brake warning lamp of the cluster in common. The electronic control according to claim 3 or 4, wherein the sensing unit 40 is equipped with a parking brake sensor 44 so that the control unit 50 operates only when the parking brake is not operated. Brake system overheat warning system using brake system.

Images