KR101735219B1 - Apparatus for preventing sliding back of vehicle using electric oil pump - Google Patents

Apparatus for preventing sliding back of vehicle using electric oil pump Download PDF

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Publication number
KR101735219B1
KR101735219B1 KR1020150190506A KR20150190506A KR101735219B1 KR 101735219 B1 KR101735219 B1 KR 101735219B1 KR 1020150190506 A KR1020150190506 A KR 1020150190506A KR 20150190506 A KR20150190506 A KR 20150190506A KR 101735219 B1 KR101735219 B1 KR 101735219B1
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KR
South Korea
Prior art keywords
vehicle
speed
oil pump
electric oil
inclination angle
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Application number
KR1020150190506A
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Korean (ko)
Inventor
박한길
Original Assignee
주식회사 현대케피코
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Priority to KR1020150190506A priority Critical patent/KR101735219B1/en
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Publication of KR101735219B1 publication Critical patent/KR101735219B1/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
    • 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
    • B60T8/24—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 vehicle inclination or change of direction, e.g. negotiating bends
    • 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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—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 having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control 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
    • B60T8/32—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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—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 having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4018—Pump units characterised by their drive mechanisms
    • 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
    • B60T2201/06—Hill holder; Start aid systems on inclined road
    • 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
    • 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
    • B60Y2400/46—Engine start hydraulic or electric motors

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The present invention relates to a hill start assist device for a vehicle using an electric oil pump and a method thereof. The hill start assist device for a vehicle comprises: an ISG mode recognition unit for recognizing an idle stop and go (ISG) mode entry of a vehicle; a gear detection unit for detecting a gear state of a vehicle; a vehicle speed detection unit for detecting a traveling speed of the vehicle; an inclination detection unit for detecting an inclination angle of a traveling road if the vehicle is stopped in a drive gear (D-stage) or a neutral gear (N-stage); and a control unit for blocking or opening a flow path of a solenoid valve forming a flow path of the electric oil pump based on comparison result of a preset inclination value and the detected inclination angle to control starting of an engine of the vehicle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle anti-skid device using an electric oil pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle anti-skid device using an electric oil pump and, more particularly, to a vehicle anti-skid device using an electric oil pump, And more particularly, to a vehicle anti-skid device using an electric oil pump and a method thereof that enable an idle stop & go (ISG) function to be used even in a large section.

The ISG device automatically turns off the vehicle engine start under a predetermined condition such as when the idle state of the vehicle engine is maintained for a predetermined time or longer due to the stop of the vehicle and then the driver's intention and the vehicle self- A function of automatically turning on the vehicle engine (Go) and enabling normal operation when the restart is required is applied to the vehicle engine control system.

If the conditions for entering the vehicle engine start off state by the ISG device are a stop state in which the vehicle speed is not detected and the speed change stage is in the neutral state and the brake pedal is operated and the predetermined time is maintained, The vehicle engine is stopped to stabilize the engine.

When the start request of the driver is detected, such as the operation of the accelerator pedal, the release of the brake pedal, the operation of the clutch pedal, etc., in the state where the vehicle engine start is turned off by the ISG device, the vehicle engine is turned on to maintain normal driving do.

As described above, when the brake pedal is operated several times in a state in which the vehicle engine is turned off by the ISG device or when the operating time has elapsed for a long time, there is a problem that the brake negative pressure is decreased and the braking force is gradually lost.

Further, in the case of the automatic transmission or the oil pump of the continuously variable transmission, the oil pressure in the automatic transmission can not be formed in the state where the vehicle engine start is OFF, so that the proper line pressure is not maintained and the gear stage in the automatic transmission is formed The clutch or the brake can not be operated, thereby causing undesirable shift shocks at the time of restarting.

In this regard, Korean Patent Laid-Open Publication No. 2009-0108422 discloses "ISG device and its control method ".

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a solenoid valve which is capable of minimizing the loss hydraulic pressure by shutting off the flow path of a solenoid valve when the inclination of the road is low, And an electric oil pump for driving the brake actuator of the vehicle by opening the flow path of the solenoid valve, and a method thereof.

The present invention also relates to an electric oil pump for compensating a rotational speed of an electric oil pump based on a difference between a current vehicle speed and a previous vehicle speed when a vehicle speed is sensed after a vehicle engine is turned off, An object of the present invention is to provide a vehicle anti-skid device using a pump and a method thereof.

The present invention also provides a vehicle anti-skid device using an electric oil pump that drives a brake actuator of a vehicle by setting a rotation speed of the electric oil pump at a predetermined maximum operating oil pressure when a failure occurs in the inclination sensor of the vehicle, and a method thereof The purpose is to provide.

According to an aspect of the present invention, there is provided a vehicle anti-skid device using an electric oil pump, comprising: an ISG mode recognition unit recognizing an entry into an idle stop and go (ISG) mode of a vehicle; A gear sensing unit for sensing a gear state of the vehicle; A vehicle speed sensing unit for sensing a speed of the vehicle; An inclination angle sensing unit for sensing an inclination angle of the traveling road when the vehicle is stopped in a state of a traveling gear (D-stage) or a neutral gear (N-stage); And a control unit for controlling the starting of the vehicle engine by shutting off or opening the flow path of the solenoid valve forming the flow path of the electric oil pump based on the comparison result between the sensed inclination angle and the predetermined inclination value. And a stop detection unit for detecting whether the vehicle is stopped based on the current running speed of the vehicle after the start of the vehicle engine is turned off by the control unit. The rotation speed of the electric oil pump is controlled in accordance with the set maximum operating oil pressure, the flow path of the solenoid valve is opened, and the brake actuator of the vehicle is driven to turn off the starting of the vehicle engine.

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If it is determined that the vehicle is not stopped by the stop detection unit, the current vehicle speed is compared with a predetermined reference vehicle speed value. If the current vehicle speed is less than the preset reference vehicle speed value, And a rotational speed compensator for comparing the reference speed and compensating the rotational speed of the electric oil pump when the maximum speed of the comparison is less than the predetermined reference speed.

If the current vehicle speed is equal to or greater than the predetermined reference vehicle speed value or the maximum speed of the electric oil pump is compared with the predetermined reference speed as a result of comparing the current vehicle speed with a predetermined reference vehicle speed value, And the starting of the vehicle engine is turned on when the reference speed is equal to or higher than the set reference speed.

The rotation speed compensator compensates the rotation speed of the electric oil pump to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed to turn off the vehicle engine by the control unit .

In order to accomplish the above object, the present invention provides a method for preventing vehicle skidding using an electric oil pump, the ISG mode recognition unit recognizing an entry into an idle stop and go (ISG) mode of a vehicle, Sensing a gear state of the vehicle; Sensing a speed of the vehicle by a vehicle speed sensing unit; Sensing an inclination angle of the traveling road when the vehicle is stopped in a state of a traveling gear (D-stage) or a neutral gear (N-stage) by the inclination angle sensing unit; And controlling the start of the vehicle engine by blocking or opening the flow path of the solenoid valve forming the flow passage of the electric oil pump based on the comparison result between the sensed inclination angle and the predetermined inclination value by the control unit And controlling the starting of the vehicle engine by blocking or opening the flow path of the solenoid valve forming the flow passage of the electric oil pump based on the comparison result between the sensed inclination angle and the predetermined inclination value, The rotation speed of the electric oil pump is controlled in accordance with the predetermined maximum operating oil pressure, and the flow path of the solenoid valve is opened to drive the brake actuator of the vehicle to turn off the starting of the vehicle engine.

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After the step of shutting off or opening the flow path of the solenoid valve forming the flow passage of the electric oil pump and controlling the start of the vehicle engine based on the result of comparison between the sensed inclination angle and the predetermined inclination value, Detecting whether the vehicle is stopped based on the speed; And comparing the current vehicle speed with a predetermined reference vehicle speed value when the vehicle is not stopped, after the step of detecting whether the vehicle is stopped based on the running speed of the current vehicle. Comparing the current vehicle speed with a preset reference vehicle speed value when the current vehicle speed is less than the preset reference vehicle speed value, Comparing the predetermined reference speed with the preset reference speed, and when the comparison result indicates that the maximum speed is equal to or greater than the predetermined reference speed, turning on the vehicle engine and comparing the maximum speed of the electric oil pump with a preset reference speed Compensating the rotational speed of the electric oil pump to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed when the maximum speed as a result of the maximum speed reference speed comparison is less than the predetermined reference speed maximum speed reference speed If the comparison result indicates that the maximum speed is equal to or higher than the preset reference speed, .

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The apparatus and method for preventing vehicle movement using the electric oil pump according to the present invention having the above-described configuration can reduce the loss hydraulic pressure by shutting off the flow path of the solenoid valve when the inclination of the road is low, The rotational speed of the electric oil pump is controlled, and the flow path of the solenoid valve is opened to drive the brake actuator of the vehicle, so that the ISG function can be realized even in the steep slope interval.

Further, in the present invention, when the running speed of the vehicle is detected after the vehicle engine is turned off, the rotational speed of the electric oil pump is compensated based on the difference between the current vehicle speed and the previous vehicle speed to drive the brake actuator of the vehicle, ISG functions can be implemented even in dangerous situations where jungling occurs.

In addition, the present invention provides a vehicle brake system in which when a failure occurs in a vehicle's inclination sensor, the rotational speed of the electric oil pump is set to a predetermined maximum operating oil pressure to drive the brake actuator of the vehicle, The ISG function can be implemented.

1 is a view for explaining an ISG system of a vehicle to which the present invention is applied.
2 is a view for explaining a configuration of a vehicle anti-skid device using an electric oil pump according to the present invention.
3 is a flowchart illustrating a procedure of a vehicle anti-skid method using the electric oil pump according to the present invention.
FIG. 4 is a flowchart for explaining a procedure for controlling start-up of a vehicle engine based on a comparison result between an inclination angle sensed in the vehicle anti-skid control method using the electric oil pump according to the present invention and a predetermined inclination value.
FIG. 5 is a flowchart illustrating a method of preventing a vehicle from being skidded by using an electric oil pump according to the present invention. FIG. 5 is a flowchart illustrating a method of controlling the start of a vehicle engine according to an embodiment of the present invention. Fig. 2 is a flow chart for explaining the procedure for confirming the operation of the apparatus shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . First, in adding reference numerals to the constituent elements of the drawings, it should be noted that the same constituent elements are denoted by the same reference numerals whenever possible even if they are displayed on other 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 view for explaining an ISG system of a vehicle to which the present invention is applied.

1, an ISG system of a vehicle according to the present invention mainly includes an ISG apparatus 10, a vehicle engine 11, a mechanical oil pump 12, an electric oil pump 20, a motor controller 21, A solenoid valve 30, an automatic transmission 31, a brake actuator 40, and a vehicle braking system 50.

The ISG device 10 is an abbreviation of Idle Stop & Go. The vehicle engine 11 is automatically turned off (Stop) when the requirement of the ISG function is satisfied when the vehicle is stopped and idle (Idle) (Go) to start the vehicle engine 11 again when the vehicle is in a condition (such as releasing a brake, stepping on an accelerator, or depressing a clutch).

On the other hand, the hybrid vehicle is a means for supplying oil to the automatic transmission 31 in order to prepare for the case where the vehicle engine 11 stops during traveling by the Idle Stop & Go function. In addition to the conventional mechanical oil pump 12, An oil pump 20 is additionally mounted.

The mechanical oil pump 12 is a mechanical pump that smoothly or forcibly circulates engine oil, which is a type of lubricant, in the vehicle engine 11. When the oil pan 13 is operated, the engine oil filtered through the oil filter 14 And is supplied to the automatic transmission 31. [ This mechanical oil pump 12 is operated by the force of the vehicle engine 11, so that when the vehicle engine 11 stops while the vehicle is running, the mechanical oil pump 12 fails to provide an appropriate hydraulic pressure to the automatic transmission 31. [

At this time, the electric oil pump 20 is operated by using the motor controller 21 so that the engine oil can be supplied to the automatic transmission 31 even if either one of the two pumps is operated.

The vehicle anti-skid device using the electric oil pump proposed in the present invention provides the braking force to the brake actuator 40 through the rotation speed control of the electric oil pump 20 when the vehicle engine is stopped, (Idle Stop & Go) function.

The vehicle anti-skid device using the electric oil pump cuts off or opens the flow path of the solenoid valve 30 forming the flow path of the electric oil pump 20, and controls the rotation speed of the electric oil pump, It is possible to improve the performance of the display device 50.

The construction of such a vehicle anti-skid device using the electric oil pump will be described in detail later with reference to FIG.

2 is a view for explaining a configuration of a vehicle anti-skid device using an electric oil pump according to the present invention.

2, the vehicle anti-skid device 100 using the electric oil pump according to the present invention mainly includes an ISG mode recognition unit 110, a gear sensing unit 120, a vehicle speed sensing unit 130, A controller 140, a controller 150, a stop sensing unit 160, and a rotation speed compensator 170.

The ISG mode recognition unit 110 can recognize the entry of the vehicle into an idle stop and go (ISG) mode.

The ISG mode recognition unit 110 recognizes that the brake pedal is on, the vehicle engine RPM is in an idle state, the cooling water temperature is warmed up sufficiently, the accelerator pedal satisfies all the conditions that the tip is out, can do. At this time, the information including the vehicle engine RPM, the coolant temperature, the tip / tip-out of the accelerator pedal according to the driving of the vehicle, and the like can be provided by the driving information detector (not shown).

The gear sensing unit 120 may sense the gear state of the vehicle.

The gear sensing unit 120 may sense that the vehicle is one of a traveling gear (D-stage), a neutral gear (N-stage), a reverse gear (R-stage) or a parking gear (P-stage) state.

The vehicle speed sensing unit 130 can sense the speed of the vehicle when the vehicle is in a traveling gear or a neutral gear state.

The vehicle speed sensing unit 130 can sense whether the vehicle is in a stationary state based on the sensed speed of the vehicle.

When the vehicle is stopped in the traveling gear or neutral gear state, the inclination angle sensing unit 140 can sense the inclination angle of the traveling road using the inclination angle sensor.

Although not shown in the drawing, a failure determination unit may be further provided for determining failure of the tilt sensor.

Based on the comparison result between the detected inclination angle and the predetermined inclination value, the control unit 150 can shut off or open the flow path of the solenoid valve that forms the flow path of the electric oil pump, thereby controlling the starting of the vehicle engine. That is, the control unit can control the starting of the vehicle engine by determining the generated oil pressure used for driving the brake actuator of the vehicle through the rotational speed of the electric oil pump.

More specifically, when it is determined that the detected inclination angle is smaller than the predetermined inclination value and the inclination angle of the traveling road is lower than the predetermined inclination angle as a result of comparing the detected inclination angle and the predetermined inclination value, the control unit 150 cuts off the flow path of the solenoid valve The starting of the vehicle engine can be turned off. That is, the control unit blocks the flow path of the solenoid valve at a low inclination, thereby preventing the rotation of the unnecessary electric oil pump.

If it is determined that the inclination angle of the driving road is steep, the controller 150 may compare the detected inclination angle with the predetermined inclination value. If the inclination angle of the driving road is steep, It is possible to control the rotational speed of the electric oil pump in accordance with the set working oil pressure and open the flow path of the solenoid valve to drive the brake actuator of the vehicle to turn off the starting of the vehicle engine. The predetermined operating hydraulic pressure is the rotational speed conversion value of the electric oil pump.

The control unit 150 controls the rotational speed of the electric oil pump in accordance with the predetermined maximum operating oil pressure when the failure of the inclination angle sensing unit 140 is detected and the vehicle braking system is not operated normally. It is possible to open the oil passage and drive the brake actuator of the vehicle to turn off the starting of the vehicle engine. That is, when the inclination angle sensing unit 140 is in a failure state, the vehicle braking system is in a dangerous state that the normal operation is not performed. Therefore, the operating oil pressure of the electric oil pump is set to the maximum to maximize the braking force of the brake actuator of the vehicle.

After the vehicle engine start of the vehicle is turned OFF by the control unit, the stop detection unit 160 can detect whether the vehicle is stopped based on the current speed of the vehicle.

If it is detected that the vehicle is stopped by the stop detection unit 160, the start-off state of the vehicle engine can be maintained.

The rotation speed compensating unit 170 compares the current vehicle speed with a predetermined reference vehicle speed value when the stopping unit 160 detects that the vehicle is not stopped.

The rotational speed compensating unit 170 compares the maximum speed of the electric oil pump with a predetermined reference speed when the current vehicle speed is less than the preset reference vehicle speed. If the comparison result indicates that the maximum speed is less than the preset reference speed, The rotational speed can be compensated.

The rotational speed compensating unit 170 compensates the rotational speed of the electric oil pump to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed so that the control unit 150 can turn off the vehicle engine .

When the current vehicle speed is equal to or greater than the predetermined reference vehicle speed value or the maximum speed of the electric oil pump is compared with the predetermined reference speed as a result of comparing the current vehicle speed with the preset reference vehicle speed value, When the vehicle speed is equal to or higher than a predetermined reference speed, the starting of the vehicle engine can be turned ON. That is, when the vehicle speed is generated despite the maximum speed of the electric oil pump, the vehicle engine can be turned on.

3 and 4 are flowcharts for explaining a procedure of a vehicle anti-skid method using the electric oil pump according to the present invention.

Referring to FIGS. 3 and 4, the vehicle anti-skid prevention method using the electric oil pump according to the present invention uses the anti-skid device using the electric oil pump described above, and a description thereof will be omitted.

First, the vehicle enters an idle stop and go (ISG) mode (S100).

Next, the gear state of the vehicle is sensed (S110).

Next, when the vehicle is in the traveling gear (D-stage) or the neutral gear (N-stage), the running speed of the vehicle is sensed (S120). After step S120, it is determined whether the vehicle is in a stop state based on the detected vehicle speed (S130).

Next, whether or not a failure of the tilt angle sensor has occurred is detected (S140).

Next, in step S140, if the occurrence of the failure of the tilt sensor is not detected, the process moves to step S200 of FIG. 4 in which the tilt angle of the road is detected.

On the other hand, if it is determined in step S140 that the failure of the tilt sensor is detected, the control flow proceeds to step S202 of FIG. 4, in which the rotational speed of the electric oil pump is controlled to a predetermined maximum working oil pressure.

Next, the detected inclination angle is compared with a predetermined inclination value (S203).

Next, if it is determined that the inclination angle of the traveling road is lower than the detected inclination angle and the predetermined inclination value after step S200, the flow path of the solenoid valve is interrupted (S205), and then the operation proceeds to step S240, Off.

Next, in step S210, if it is determined that the detected inclination angle and the inclination angle of the traveling road that is greater than the predetermined inclination value are steep slopes, the predetermined working oil pressure is extracted according to the detected inclination angle (S210).

Next, the rotational speed of the electric oil pump is controlled according to the extracted operating oil pressure, and the flow path of the solenoid valve is opened (S220).

Next, the brake actuator of the vehicle is driven (S230).

Next, the starting of the vehicle engine is turned off (S240).

Next, the current speed of the vehicle is sensed (S250).

Next, it is determined whether the vehicle is stopped based on the detected driving speed (S260). In step S260, after comparing the detected inclination angle and the predetermined inclination value, the vehicle engine is turned off, and then the vehicle is stopped.

Next, if it is determined that the vehicle is not stopped after step S260, the current vehicle speed is compared with a predetermined reference vehicle speed value (S270).

Next, after step S260, if the current vehicle speed is equal to or greater than the preset reference vehicle speed value, the engine of the vehicle is turned off (S280).

On the other hand, if the current vehicle speed is less than the predetermined reference vehicle speed value after step S270, the maximum speed of the electric oil pump is compared with the preset reference speed (S271).

If the maximum speed is equal to or greater than the preset reference speed after step S271, the process proceeds to step S280.

On the other hand, if the maximum speed is less than the preset reference speed after step S271, the rotational speed of the electric oil pump is compensated (S272). In step S272, the rotational speed of the electric oil pump is compensated to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed, and the routine proceeds to step S210.

If it is detected that the vehicle is stopped after step 260, the engine is kept in the OFF state (S290).

As described above, in the vehicle anti-skid prevention apparatus and method using the electric oil pump according to the present invention, when the slope of the road is inclined, the flow path of the solenoid valve is blocked to minimize the loss hydraulic pressure. And the brake actuator of the vehicle is driven by opening the flow path of the solenoid valve, the ISG function can be realized even in the steep slope interval.

Further, in the present invention, when the running speed of the vehicle is detected after the vehicle engine is turned off, the rotational speed of the electric oil pump is compensated based on the difference between the current vehicle speed and the previous vehicle speed to drive the brake actuator of the vehicle, The ISG function can be implemented even in the case where the jumping phenomenon occurs.

In addition, the present invention provides a vehicle brake system in which when a failure occurs in a vehicle's inclination sensor, the rotational speed of the electric oil pump is set to a predetermined maximum operating oil pressure to drive the brake actuator of the vehicle, The ISG function can be implemented.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It will be understood that the invention may be practiced.

100: Vehicle anti-skid device using electric oil pump
110: ISG mode recognition unit
120:
130:
140:
150:
160:
170: rotation speed compensation unit

Claims (17)

An ISG mode recognition unit recognizing entry of an idle stop and go (ISG) mode of the vehicle;
A gear sensing unit for sensing a gear state of the vehicle;
A vehicle speed sensing unit for sensing a speed of the vehicle;
An inclination angle sensing unit for sensing an inclination angle of the traveling road when the vehicle is stopped in a state of a traveling gear (D-stage) or a neutral gear (N-stage);
A control unit for shutting off or opening the flow path of the solenoid valve forming the flow path of the electric oil pump based on a result of comparison between the sensed inclination angle and the predetermined inclination value to control the starting of the vehicle engine; And
And a stop detection unit for detecting whether the vehicle is stopped based on the current running speed of the vehicle after the vehicle engine start of the vehicle is turned off by the control unit,
The control unit controls the rotational speed of the electric oil pump in accordance with a predetermined maximum operating oil pressure when the occurrence of the failure of the inclination angle sensing unit is detected and opens the flow path of the solenoid valve to drive the brake actuator of the vehicle, (OFF) the motor-driven oil pump. delete delete delete delete delete The method according to claim 1,
If it is determined that the vehicle is not stopped by the stop detection unit, the current vehicle speed is compared with a predetermined reference vehicle speed value, and if the current vehicle speed is less than the preset reference vehicle speed value, And a rotational speed compensating unit for compensating a rotational speed of the electric oil pump when the maximum speed of the comparison is less than a preset reference speed. 8. The method of claim 7,
If the current vehicle speed is equal to or greater than a predetermined reference vehicle speed value or the maximum speed of the electric oil pump is compared with the predetermined reference speed as a result of comparing the current vehicle speed with a preset reference vehicle speed value, And the starting of the vehicle engine is turned on when the vehicle speed is equal to or higher than the predetermined speed. 8. The method of claim 7,
Wherein the rotation speed compensating unit compensates the rotation speed of the electric oil pump to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed to turn off the vehicle engine by the control unit Vehicle anti - skid device using electric oil pump. Recognizing an entry into an idle stop and go (ISG) mode of the vehicle by the ISG mode recognition unit;
Sensing a gear state of the vehicle by the gear sensing unit;
Sensing a speed of the vehicle by a vehicle speed sensing unit;
Sensing an inclination angle of the traveling road when the vehicle is stopped in a state of a traveling gear (D-stage) or a neutral gear (N-stage) by the inclination angle sensing unit; And
And controlling the starting of the vehicle engine by blocking or opening the flow path of the solenoid valve forming the flow passage of the electric oil pump based on the comparison result between the sensed inclination angle and the predetermined inclination value by the control unit,
In the step of controlling the starting of the vehicle engine by interrupting or opening the flow path of the solenoid valve forming the flow path of the electric oil pump based on the comparison result between the sensed inclination angle and the predetermined inclination value,
When the occurrence of a failure in the inclination angle sensing unit is sensed, the rotation speed of the electric oil pump is controlled in accordance with a preset maximum operating oil pressure, the solenoid valve is opened to drive the brake actuator of the vehicle, Wherein the oil pump is driven by a motor. delete delete delete 11. The method of claim 10,
After the step of shutting off or opening the flow path of the solenoid valve forming the flow path of the electric oil pump and controlling the starting of the vehicle engine based on the comparison result between the sensed inclination angle and the predetermined inclination value,
Detecting whether the vehicle is stopped based on the current speed of the vehicle; And
After the step of detecting whether the vehicle is stopped based on the current speed of the vehicle,
Comparing the current vehicle speed with a preset reference vehicle speed value if the vehicle is not stopped; Lt; / RTI >
Comparing the current vehicle speed with a predetermined reference vehicle speed value when the vehicle is not stopped,
Comparing the maximum speed of the electric oil pump with a preset reference speed when the comparison result indicates that the current vehicle speed is less than the preset reference vehicle speed value and if the comparison result indicates that the maximum speed is equal to or higher than the preset reference speed, (ON)
Comparing the maximum speed of the electric oil pump with a predetermined reference speed,
Compensating the rotational speed of the electric oil pump to a predetermined set value according to the difference between the current vehicle speed and the previous vehicle speed if the maximum speed is less than the preset reference speed maximum speed reference speed as a result of the maximum speed reference speed comparison, And turning on the engine of the vehicle when the comparison result indicates that the maximum speed is equal to or higher than a preset reference speed. delete delete delete
KR1020150190506A 2015-12-30 2015-12-30 Apparatus for preventing sliding back of vehicle using electric oil pump KR101735219B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007196756A (en) * 2006-01-24 2007-08-09 Toyota Motor Corp Controller for vehicle and vehicle
KR100783904B1 (en) * 2006-11-28 2007-12-10 현대자동차주식회사 Slope road jostle prevention device for hybrid car and method thereof
JP2012255383A (en) * 2011-06-09 2012-12-27 Mitsubishi Motors Corp Idle stop vehicle
JP2013185500A (en) * 2012-03-08 2013-09-19 Jatco Ltd Vehicle with automatic stop engine and control method for the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007196756A (en) * 2006-01-24 2007-08-09 Toyota Motor Corp Controller for vehicle and vehicle
KR100783904B1 (en) * 2006-11-28 2007-12-10 현대자동차주식회사 Slope road jostle prevention device for hybrid car and method thereof
JP2012255383A (en) * 2011-06-09 2012-12-27 Mitsubishi Motors Corp Idle stop vehicle
JP2013185500A (en) * 2012-03-08 2013-09-19 Jatco Ltd Vehicle with automatic stop engine and control method for the same

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