KR101659366B1 - Apparatus and method for controlling vehicle brake - Google Patents

Apparatus and method for controlling vehicle brake Download PDF

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Publication number
KR101659366B1
KR101659366B1 KR1020150096525A KR20150096525A KR101659366B1 KR 101659366 B1 KR101659366 B1 KR 101659366B1 KR 1020150096525 A KR1020150096525 A KR 1020150096525A KR 20150096525 A KR20150096525 A KR 20150096525A KR 101659366 B1 KR101659366 B1 KR 101659366B1
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KR
South Korea
Prior art keywords
vehicle
brake
accelerator
determined
speed
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KR1020150096525A
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Korean (ko)
Inventor
정준용
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주식회사 현대케피코
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Publication of KR101659366B1 publication Critical patent/KR101659366B1/en

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    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/58—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration responsive to speed and another condition or to plural speed conditions
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/08—Lane monitoring; Lane Keeping Systems
    • B60T2201/088—Lane monitoring; Lane Keeping Systems using transmission control

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

An apparatus and a method for controlling a vehicle brake are disclosed. The method for controlling a vehicle brake, according to an embodiment of the present invention, comprises: a step (a) of determining whether a gear change request signal from R to D is inputted in a vehicle moving backward; a step (b) of determining whether a vehicle brake is operated if it is determined that the gear change signal from R to D is inputted in the step (a); and a step (c) of outputting a brake operation control signal to differentially apply braking force according to the current speed of the vehicle if it is determined that the vehicle brake is not operated in the step (b). Therefore, the present invention prevents the engine of the vehicle from being turned off by differentially applying braking force according to the current speed of the vehicle.

Description

[0001] Apparatus and method for controlling vehicle brake [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automotive brake control apparatus and method, and more particularly, to an automotive brake control apparatus and method for preventing an engine from being turned off when a shift lever is shifted for forward travel during a reverse operation.

Generally, the automatic transmission automatically adjusts the transmission ratio according to the running speed and load of the vehicle. As these automatic transmissions become more common, the driving convenience is improved, but sometimes unexpected problems are caused and the drivability is deteriorated.

For example, when the shift lever is set to the 'D' position while the shift lever of the automatic transmission is positioned at the 'R' position for parking, and the vehicle is not stepped on the brake pedal, there arises an unexpected problem, .

If the vehicle speed of the backward vehicle is not large, the vehicle which has been backward is stopped for a while and then advanced, since the magnitude of the torque generated by the engine in the state of the "D" stage of the speed change stage is larger than the torque transmitted from the wheel to the transmission. When the vehicle speed of the vehicle exceeds a certain level, there is a risk that the engine shut-off phenomenon may occur because the torque in the forward direction generated by the engine is smaller than the torque transmitted from the wheel of the reverse vehicle to the transmission.

Korean Patent Publication No. 2006-0110792 Korean Patent Registration No. 10-0888138

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automotive brake control apparatus and method for preventing an engine from being turned off according to a vehicle speed when a shift lever is switched for forward travel during a reverse operation.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to another aspect of the present invention, there is provided an automobile brake control method including: (a) determining whether a shift request signal is inputted from an R-stage to a D-stage in a vehicle running in reverse; (b) if it is determined in step (a) that a shift request signal is inputted from the R-stage to the D-stage, determining whether the vehicle brake operation is performed; And (c) outputting a brake operation control signal so that the braking force can be differentially applied according to the current vehicle speed when it is determined in the step (b) that the vehicle brake does not operate.

The step (c) includes a step of outputting a brake operation control value, which is mapped to a current vehicle speed, with reference to a lookup table to which a predetermined brake operation control value is mapped according to the vehicle speed.

 Further, the method for controlling an automotive brake according to the present invention may further include the steps of: (d) determining whether the accelerator of the vehicle is operating in a state where the automatic brake control according to the step (c) is in operation; And (e) if it is determined in step (d) that the accelerator of the vehicle is operating, canceling the automatic brake operation control, and if it is determined that the accelerator of the vehicle does not operate, And determining whether to release the operation control.

If it is determined that the accelerator of the vehicle is not operating, the step (e) may include comparing the backward traveling speed of the vehicle with a predetermined threshold value TH 1; If the backward travel speed of the vehicle is less than a preset threshold TH 1, canceling the automatic brake operation control, and if the backward travel speed of the vehicle is greater than a predetermined threshold value TH 1, ; And releasing the automatic brake operation control if the time (T1) measured by the timer is greater than a preset threshold value (TH2).

According to another aspect of the present invention, there is provided an automotive brake control apparatus including: a shift lever operation detecting unit that detects a position of a shift lever that is varied according to a state of operation of a shift lever of a driver; A vehicle speed detector for detecting a speed in a running direction of the vehicle while driving; An accelerator operation detecting unit for converting the pedal pressure applied to the pedal into an electric signal in accordance with the operating state of the accelerator pedal of the driver; A brake operation detecting unit for detecting an operating state in accordance with a brake pedal operation state of a driver; When it is determined that the shift request signal is inputted from the R-stage to the D-stage by the output signal of the shift lever operation detecting section and it is determined that the vehicle brake is not operated by the output signal of the brake operation detecting section, And a control unit for outputting a brake operation control signal so that the braking force can be applied.

The control unit refers to a look-up table to which a predetermined brake operation control value is mapped according to the vehicle speed, and outputs a brake operation control value mapped to the current vehicle speed.

The control unit releases the automatic brake operation control when it is determined that the vehicle accelerator is operated by the output signal of the accelerator operation detecting unit while the automatic brake control is in operation.

When it is determined by the output signal of the accelerator operation detecting section that the vehicle's accelerator does not operate while the automatic brake control is in operation, the control section determines whether to release the automatic brake operation control according to the backward traveling speed of the vehicle .

At this time, if it is determined that the accelerator of the vehicle does not operate, the control unit compares the backward traveling speed of the vehicle with a predetermined threshold value TH 1, and if the backward traveling speed of the vehicle exceeds a predetermined threshold value TH 1), the automatic brake operation control is canceled.

On the other hand, if it is determined that the accelerator of the vehicle is not operating, the control unit compares the backward traveling speed of the vehicle with a predetermined threshold value TH 1, and if the backward traveling speed of the vehicle is less than a predetermined threshold value TH 1), the timer is operated, and if the time (T1) measured by the timer is greater than a preset threshold value (TH 2), the automatic brake operation control is released.

As described above, according to the present invention, when the shift lever is switched according to the driver's will to travel forward during the backward travel, the braking force is automatically controlled to differentially apply the braking force according to the current vehicle speed, It is possible to prevent a phenomenon in which the torque is transmitted to the engine and the starting is turned off.

1 is a block diagram of an automotive brake control apparatus according to an embodiment of the present invention;
2 is an operational flowchart of an automotive brake control method according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a block diagram of an automotive brake control apparatus according to an embodiment of the present invention.

1, an automotive brake control apparatus according to the present invention includes a shift lever operation detecting unit 100, a vehicle speed detecting unit 200, an accelerator operation detecting unit 300, a traveling direction detecting unit 400, a brake operation detecting unit 500, And a control unit 600.

The shift lever operation detecting portion 100 is constituted by a shift lever position sensor or the like and detects the position of the shift lever that is varied in accordance with the operation state of the shift lever of the driver. Specifically, the shift lever operation detecting unit 100 senses that the shift lever is switched from the 'R' stage to the 'D' stage, and transmits the detection signal to the controller 600.

The vehicle speed detector 200 may be configured by a wheel speed sensor or the like and detects the speed in the running direction of the vehicle while driving and transmits the detected vehicle speed to the controller 600. [

The accelerator operation detecting unit 300 includes an accelerator position sensor and the like, converts the pressure applied to the pedal to an electrical signal according to the operating state of the accelerator pedal of the driver, and transmits the electrical signal to the controller 600.

The traveling direction detecting unit 400 detects the traveling direction of the vehicle and transmits the detected traveling direction to the control unit 600. For example, the running direction detecting section 400 can detect the running direction in the forward / backward direction from the output shaft speed sensor provided at the rear end of the shift lever of the automatic transmission or at the front end of the differential gear.

The brake operation detecting unit 500 detects the operating state according to the operating state of the brake pedal of the driver. For example, the brake operation detecting unit 500 may be implemented in a manner of detecting a change of an electrical signal that occurs when a driver touches a metal or the like when the brake pedal is pressed. As another example, the brake operation detecting unit 500 may be implemented by a method of converting a varying magnetic field intensity into an electrical signal as the brake pedal operates in a contactless manner. The operation signal (ON signal or OFF signal) of the brake detected by the brake operation detecting unit 500 is transmitted to the control unit 600 and utilized for automatic brake control.

When the vehicle is traveling in the reverse direction and the brake is not operated when the shift lever is switched from the R'th stage to the D'th stage, the brakes are automatically operated to apply the braking force to the vehicle And outputs a control signal for performing the above operation.

At this time, the control unit 600 determines whether the shift lever detection signal transmitted from the shift lever operation detection unit 100, the vehicle speed transmitted from the vehicle speed detection unit 200, the brake operation state transmitted from the brake operation detection unit 500, And outputs a control signal for adaptively applying the braking force according to the vehicle speed.

To this end, a look-up table in which the brake operation control value is mapped is prepared in advance according to the vehicle speed, and the controller 600 refers to the look-up table for the brake operation control value mapped to the current vehicle speed.

For example, if the shift lever is switched from the 'R' stage to the 'D' stage and the vehicle speed of the vehicle traveling in the reverse direction exceeds 40 km / h in a state in which the brake is not operating, A brake control signal is outputted so that a 30% load is applied when the vehicle speed exceeds 30 Km / h, a brake control signal is outputted so that a load of 20% is taken when the vehicle speed exceeds 20 Km / h, When the vehicle speed exceeds 10 km / h, the brake control signal can be outputted so that the load is 10%.

When the vehicle is reversed in the state where the speed change stage is 'D', the engine generates torque in the direction to advance, but the torque transmitted from the wheel to the transmission becomes the reverse direction opposite to the torque generated by the engine.

For example, if the vehicle speed of the reverse vehicle is not large, since the magnitude of the torque generated in the engine in the state where the speed change stage is 'D' is larger than the torque transmitted from the wheel to the transmission, There is a risk that the engine may be turned off because the torque in the forward direction generated by the engine is smaller than the torque transmitted from the wheel of the backward vehicle to the transmission when the vehicle speed of the reverse vehicle is a certain level or more.

In order to prevent this, it is possible to prevent the engine from being turned off, thereby improving the drivability by automatically setting the degree of detection of the brakes according to the vehicle speed when the vehicle speed is equal to or higher than a predetermined vehicle speed.

In addition, the controller 600 automatically releases the brake, and when the accelerator operation ON is detected while applying a certain level of braking force to the vehicle, the controller 600 cancels the automatic brake control operation. At this time, an electric signal whose pressure is changed according to the operating state of the accelerator pedal transmitted from the accelerator operation detecting unit 300 is used.

In addition, when the brake is automatically operated and the accelerator is not operated, the control unit 600 compares the backward traveling speed of the vehicle with a preset threshold value TH1.

As a result of the comparison, if the backward travel speed of the vehicle is less than the threshold value TH 1, the automatic brake control operation is canceled because the magnitude of the forward torque generated by the engine is sufficiently larger than the torque transmitted from the wheel to the transmission.

Alternatively, if the vehicle backward traveling speed exceeds the threshold value TH1, the control unit 600 operates the timer, and if the time T1 measured by the timer exceeds the preset threshold value TH2 , It is determined that the backward travel speed is sufficiently reduced by the automatic brake operation, and the automatic brake control operation is canceled.

The actuator 700 adjusts the valves of the front wheel and / or the rear wheel hydraulic line on / off in accordance with the control signal applied from the controller 600.

1 and 2, a vehicle brake control method according to an embodiment of the present invention of an automobile brake control apparatus according to an embodiment of the present invention having the above-described configuration and functions will be described.

2 is an operational flowchart of a method for controlling an automotive brake according to an embodiment of the present invention.

When the vehicle starts to run, the shift lever operation detecting unit 100, the vehicle speed detecting unit 200, the accelerator operation detecting unit 300, the traveling direction detecting unit 400, and the brake operation detecting unit 500, A lever position, a vehicle speed, an accelerator operation state, a travel direction, a brake operation state, and the like.

When the driver switches the shift lever from the 'R' stage to the 'D' stage with the forward driving will in the vehicle running backward, the shift lever motion detector 100 transmits the sensed signal to the controller 600, The control unit 600 determines whether the position of the shift lever is switched from the 'R' stage to the 'D' stage based on the received signal (S210).

If it is determined in step S210 that the position of the shift lever is switched from the 'R' stage to the 'D' stage, the control unit 600 determines whether the brake is operated based on the detection signal transmitted from the brake operation detection unit 500 (S220).

If it is determined in step S220 that the brake does not operate, the controller 600 sets a differential control signal for adaptively applying the braking force to the vehicle speed based on the vehicle speed of the current driving vehicle transmitted from the vehicle speed detecting unit 200 (S230).

For example, when the vehicle speed of the vehicle traveling in the reverse direction exceeds 40 km / h, the control unit 600 outputs a brake control signal so that the load is 40%. When the vehicle speed exceeds 30 km / h, A brake control signal is outputted so that a load of 20% is applied when the vehicle speed exceeds 20 Km / h, and a brake control signal is outputted so that a load of 10% is applied when the vehicle speed exceeds 10 Km / h can do.

While the automatic brake control operation is being performed as in step S230, the controller 600 receives the accelerator operation detection signal from the accelerator operation detector 300 and determines whether the accelerator is operating (S240).

If it is determined in step S240 that the accelerator is operating, the controller 600 cancels the automatic brake control operation (S260).

Alternatively, if it is determined that the accelerator does not operate, the controller 600 receives the running direction information of the vehicle forward or backward from the running direction detector 400. If the vehicle is traveling backward, With a predetermined threshold value TH1 (S250).

If it is determined in step S250 that the backward traveling speed is less than the predetermined threshold value TH1, the controller 600 performs the automatic brake control operation because the magnitude of the forward torque generated in the engine is sufficiently larger than the torque transmitted from the wheel to the transmission. (S260).

Alternatively, if the backward travel speed exceeds the preset threshold value TH1, the control unit 600 activates the timer (S253) and sets the time T1 measured by the timer to a preset threshold value TH2. (S255).

If it is determined in step S255 that the time T1 measured by the timer exceeds the preset threshold TH2, the controller 600 determines that the backward travel speed is sufficiently reduced by the automatic brake operation, The operation is canceled (S260).

  It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the scope of the claims and their equivalents shall be construed as being included within the scope of the present invention.

100: Shift lever operation detecting unit 200:
300: Accelerator motion detector 400:
500: brake operation detecting unit 600:
700: Actuator

Claims (10)

(a) determining whether a shift request signal is inputted from the R-stage to the D-stage in the vehicle running in reverse;
(b) if it is determined in step (a) that a shift request signal is inputted from the R-stage to the D-stage, determining whether the vehicle brake operation is performed;
(c) outputting a brake operation control signal such that the braking force can be differentially applied according to the current vehicle speed when it is determined that the vehicle brake is not operated in the step (b);
(d) determining whether the accelerator of the vehicle is operating in a state where the automatic brake control according to the step (c) is in operation; And
(e) if it is determined in step (d) that the accelerator of the vehicle is operating, releasing the automatic brake operation control, and if it is determined that the accelerator of the vehicle is not operating, Determining whether to release the control
And the vehicle brake control method.
The method of claim 1, wherein the step (c)
And a step of outputting a brake operation control value that is mapped to a current vehicle speed by referring to a lookup table to which a predetermined brake operation control value is mapped according to a vehicle speed
Gt;
delete 2. The method of claim 1, wherein step (e)
Comparing the backward traveling speed of the vehicle with a preset threshold value (TH1) if it is determined that the accelerator of the vehicle is not operating;
If the backward travel speed of the vehicle is less than a preset threshold TH 1, canceling the automatic brake operation control, and if the backward travel speed of the vehicle is greater than a predetermined threshold value TH 1, ; And
And releasing the automatic brake operation control if the time (T1) measured by the timer is greater than a preset threshold value (TH2)
Gt;
A shift lever operation detecting unit that detects the position of the variable shift lever in accordance with the operation state of the shift lever of the driver;
A vehicle speed detector for detecting a speed in a running direction of the vehicle while driving;
An accelerator operation detecting unit for converting the pedal pressure applied to the pedal into an electric signal in accordance with the operating state of the accelerator pedal of the driver;
A brake operation detecting unit for detecting an operating state in accordance with a brake pedal operation state of a driver; And
When it is determined that the shift request signal is inputted from the R-stage to the D-stage by the output signal of the shift lever operation detecting section and it is determined that the vehicle brake is not operated by the output signal of the brake operation detecting section, A control unit for outputting a brake operation control signal so that the braking force can be applied,
, ≪ / RTI &
When it is determined that the accelerator of the vehicle is operated by the output signal of the accelerator operation detecting section while the automatic brake control is in operation, the automatic brake operation control is canceled
In-vehicle brake control device.
6. The apparatus of claim 5,
Refers to a lookup table to which a predetermined brake operation control value is mapped according to the vehicle speed, and outputs a brake operation control value mapped to the current vehicle speed
In-vehicle brake control device.
delete 6. The apparatus of claim 5,
Determining whether to release the automatic brake operation control according to the backward traveling speed of the vehicle when it is determined by the output signal of the accelerator operation detection section that the vehicle's accelerator does not operate in the state that the automatic brake control is in operation
In-vehicle brake control device.
9. The apparatus according to claim 8,
If it is determined that the accelerator of the vehicle is not operating, compares the backward traveling speed of the vehicle with a preset threshold value (TH 1), and if the backward traveling speed of the vehicle is less than a preset threshold value (TH 1) Releasing brake operation control
In-vehicle brake control device.

9. The apparatus according to claim 8,
If it is determined that the accelerator of the vehicle does not operate, it compares the backward travel speed of the vehicle with a predetermined threshold value (TH 1), and if the backward travel speed of the vehicle is greater than a predetermined threshold value (TH 1) , And releasing the automatic brake operation control if the time (T1) measured by the timer is greater than a predetermined threshold value (TH2)
In-vehicle brake control device.
KR1020150096525A 2015-07-07 2015-07-07 Apparatus and method for controlling vehicle brake KR101659366B1 (en)

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KR1020150096525A KR101659366B1 (en) 2015-07-07 2015-07-07 Apparatus and method for controlling vehicle brake

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004268753A (en) * 2003-03-10 2004-09-30 Komatsu Forklift Co Ltd Travel control device of industrial vehicle
KR20060110792A (en) 2005-04-21 2006-10-25 가부시키가이샤 애드빅스 Vehicle brake control device
KR100852991B1 (en) * 2007-06-11 2008-08-19 대동공업주식회사 Ignition off prevention system at the urgency breaking of working machine
KR100888138B1 (en) 2008-03-11 2009-03-13 콘티넨탈 오토모티브 시스템 주식회사 Apparatus and method for controlling break of vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004268753A (en) * 2003-03-10 2004-09-30 Komatsu Forklift Co Ltd Travel control device of industrial vehicle
KR20060110792A (en) 2005-04-21 2006-10-25 가부시키가이샤 애드빅스 Vehicle brake control device
KR100852991B1 (en) * 2007-06-11 2008-08-19 대동공업주식회사 Ignition off prevention system at the urgency breaking of working machine
KR100888138B1 (en) 2008-03-11 2009-03-13 콘티넨탈 오토모티브 시스템 주식회사 Apparatus and method for controlling break of vehicle

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