KR20110138057A - Protection circuit of electrical brake system for vehicle - Google Patents

Protection circuit of electrical brake system for vehicle Download PDF

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Publication number
KR20110138057A
KR20110138057A KR1020100058165A KR20100058165A KR20110138057A KR 20110138057 A KR20110138057 A KR 20110138057A KR 1020100058165 A KR1020100058165 A KR 1020100058165A KR 20100058165 A KR20100058165 A KR 20100058165A KR 20110138057 A KR20110138057 A KR 20110138057A
Authority
KR
South Korea
Prior art keywords
voltage
voltage regulator
brake system
vehicle
wheel
Prior art date
Application number
KR1020100058165A
Other languages
Korean (ko)
Inventor
이상현
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020100058165A priority Critical patent/KR20110138057A/en
Publication of KR20110138057A publication Critical patent/KR20110138057A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
    • B60T8/17616—Microprocessor-based systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors
    • B60Y2400/3032—Wheel speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

PURPOSE: A protection circuit of an electric brake system is provided to improve the stability of a vehicle by controlling a brake system according to the wheel speed of a vehicle. CONSTITUTION: A protection circuit of an electric brake system a voltage regulator(VCC), a main micro controller unit(Mm) and a diode(D1). The voltage regulator outputs the voltage. The main micro controller unit is electrically connected to the voltage regulator. If the voltage is applied, the main micro controller unit is installed to each wheel of a vehicle in the voltage regulator. The main micro controller unit is applied with the wheel rotation speed in the wheel sensor measuring the wheel rotation speed through a signal input terminal(Sw_in) and the brake system is controlled.

Description

PROTECTION CIRCUIT OF ELECTRICAL BRAKE SYSTEM FOR VEHICLE

The present invention relates to a protection circuit of an electronic brake system, and more particularly, to a protection circuit of an electronic brake system capable of blocking an abnormal voltage from being applied to the voltage regulator by electrically connecting a diode to the voltage regulator.

In general, the vehicle controls the attitude of the vehicle by controlling the brake system according to the speed of each wheel of the vehicle in order to improve a dangerous situation in which driving stability is degraded due to slip or spin. The vehicle's safety can be improved through electronic brake systems such as Electronic Stability Control (ESC) and Anti-lock Brake System (ABS).

The brake system is a system for controlling the operation of the brake mounted on each wheel through the speed of each wheel sensed by the wheel sensor mounted on each wheel of the vehicle.

Such a brake system includes a microcontroller unit, and the microcontroller unit controls the operation of the brake mounted to each wheel according to the speed of each wheel applied from each wheel. The microcontroller unit is also driven by the voltage applied by the voltage regulator.

 However, in the case of such a vehicle brake system, when an abnormal voltage is generated in the wheel sensor, the abnormal voltage is applied to the voltage regulator, thereby causing an abnormality in the voltage applied to the microcontroller unit, which may cause the microcontroller unit to malfunction. have. This abnormal voltage may be generated during maintenance or repair of the vehicle.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and an object of the present invention is to provide a protection circuit of an electronic brake system that can block an abnormal voltage from being applied to the voltage regulator by electrically connecting a diode to the voltage regulator. .

In order to achieve the above object, the protection circuit of the electronic brake system according to the present invention includes a voltage regulator for outputting a voltage, and is electrically connected to the voltage regulator so that a voltage is applied from the voltage regulator, and is mounted on each wheel of the vehicle. In response to the wheel rotation speed transmitted from the wheel sensor measuring the wheel rotation speed through the signal input terminal, the main microcontroller unit controlling the brake system of the vehicle and the abnormal voltage applied through the signal input terminal are applied to the voltage regulator. A cathode may be connected to the signal input terminal and an anode of the anode may be electrically connected to the voltage regulator to prevent the signal from being blocked.

The diode may have a cathode electrically connected to the microcontroller unit to transfer a voltage applied from the voltage regulator to the microcontroller unit.

When the voltage is applied from the voltage regulator, the microcontroller unit may apply a driving voltage to each wheel sensor.

The protection circuit of the electronic brake system according to the present invention can electrically connect a diode to the voltage regulator, thereby preventing the abnormal voltage from being applied to the voltage regulator.

1 is a circuit diagram illustrating a protection circuit of an electronic brake system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention. In addition, when a part is electrically coupled with another part, this includes not only a case where the part is directly connected, but also a part connected between other elements such as a resistor in the middle.

1, there is shown a circuit diagram showing a protection circuit of an electronic brake system according to an embodiment of the present invention. As shown in FIG. 1, the protection circuit 10 of the electronic brake system is electrically connected to a voltage regulator VCC and a voltage regulator VCC for outputting a voltage, and when a voltage is applied from the voltage regulator VCC, The main microcontroller unit (Mm) and the signal input stage (Sw_in) for controlling the brake system of the vehicle by receiving the wheel rotation speed transmitted from the wheel sensor mounted on each wheel to measure the wheel rotation speed through the signal input stage Sw_in. The cathode (c) is connected to the signal input terminal (Sw_in) and the anode (a) is electrically connected to the voltage regulator (VCC) to block the abnormal voltage applied through the voltage regulator (VCC) ( D).

Here, the signal input terminal Sw_in receives a current corresponding to the wheel rotation speed transmitted from the wheel sensor. The current according to the input wheel rotation speed is converted into a voltage through a resistor ra electrically connected to the signal input terminal Sw_in, and the converted voltage is formed of a comparator Co electrically connected to the signal input terminal Sw_in. It is applied to one input terminal (+). The second input terminal (-) of the comparator Co is electrically connected to a reference voltage Vref line which is set in advance to control the brake system.

The comparator Co compares the voltage according to the current applied to the signal input terminal Sw_in with the set reference voltage Vref, and outputs a high or low level output voltage, which is a digital signal, to the output terminal o. do.

The comparator Co receives the ignition key IGN input signal and compares the signals applied to the first input terminal + and the second input terminal − only when the ignition key IGN is turned on.

The main microcontroller unit Mm receives the output voltage output from the comparator Co and controls the operation of the brake of each wheel of the vehicle according to the voltage level of the output voltage. The brake operation control may be a control regarding an anti-lock brake system (ABS) or an electronic stability control (ESC).

The main microcontroller unit Mm operates only when the ignition key IGN is turned on and an output voltage is applied through the comparator Co, and operates with a voltage applied through the voltage regulator VCC. When the ignition key IGN is turned on to operate, the main microcontroller unit Mm applies a driving voltage for driving the wheel sensor to the wheel sensor.

In this case, the voltage applied from the voltage regulator VCC is applied to the main microcontroller unit Mm through the diode D1. The diode D1 has an anode a electrically connected to the voltage regulator VCC, and a cathode c electrically connected to the main microcontroller unit Mm and the output terminal o of the comparator Co. . The first input terminal (+) of the comparator Co is electrically connected to the output terminal o through the resistor rb.

The diode D1 has an unstable voltage input to the signal input terminal Sw_in and is applied to the output terminal o of the comparator Co through the resistor rb, but the voltage is reduced from the cathode c to the anode a. Since the application is blocked, the unstable voltage can be prevented from being applied to the voltage regulator VCC. Therefore, an abnormal voltage is applied to the main microcontroller unit Mm receiving the voltage from the voltage regulator VCC, thereby preventing an abnormal operation.

That is, the protection circuit of the electronic brake system prevents the diode D1 from being applied to the voltage regulator VCC even when an unstable voltage is input to the signal input terminal Sw_in when the vehicle is being repaired or repaired. An abnormal operation of the main microcontroller unit Mm to which a voltage is applied can be prevented.

What has been described above is just one embodiment for implementing the protection circuit of the electronic brake system according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

10; Protection circuit of electronic brake system
Sw_in; Signal input stage Co; Comparator
VCC; Voltage regulator Mm; Main microcontroller unit

Claims (3)

A voltage regulator for outputting a voltage;
When the voltage regulator is electrically connected to the voltage regulator, when a voltage is applied from the voltage regulator, the wheel rotation speed transmitted from the wheel sensor mounted on each wheel of the vehicle to measure the wheel rotation speed is applied through a signal input terminal, and the brake of the vehicle is applied. A main microcontroller unit for controlling the system; And
In order to block the abnormal voltage applied through the signal input terminal to the voltage regulator, a cathode is connected to the signal input terminal and an anode electrically connected to the voltage regulator, characterized in that the electronic brake system comprises a Protection circuit. The method according to claim 1,
The diode is a protection circuit of the electronic brake system, characterized in that the cathode is electrically connected to the microcontroller unit, to transfer the voltage applied from the voltage regulator to the microcontroller unit. The method according to claim 1,
The microcontroller unit applies a driving voltage to each wheel sensor when a voltage is applied from the voltage regulator.
KR1020100058165A 2010-06-18 2010-06-18 Protection circuit of electrical brake system for vehicle KR20110138057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100058165A KR20110138057A (en) 2010-06-18 2010-06-18 Protection circuit of electrical brake system for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100058165A KR20110138057A (en) 2010-06-18 2010-06-18 Protection circuit of electrical brake system for vehicle

Publications (1)

Publication Number Publication Date
KR20110138057A true KR20110138057A (en) 2011-12-26

Family

ID=45504119

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100058165A KR20110138057A (en) 2010-06-18 2010-06-18 Protection circuit of electrical brake system for vehicle

Country Status (1)

Country Link
KR (1) KR20110138057A (en)

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