KR101815837B1 - Apparatus for controlling electric oil pump of automatic transmission and method thereof - Google Patents

Apparatus for controlling electric oil pump of automatic transmission and method thereof Download PDF

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Publication number
KR101815837B1
KR101815837B1 KR1020150181283A KR20150181283A KR101815837B1 KR 101815837 B1 KR101815837 B1 KR 101815837B1 KR 1020150181283 A KR1020150181283 A KR 1020150181283A KR 20150181283 A KR20150181283 A KR 20150181283A KR 101815837 B1 KR101815837 B1 KR 101815837B1
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KR
South Korea
Prior art keywords
vehicle speed
state
negative pressure
brake
oil pump
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KR1020150181283A
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Korean (ko)
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KR20170073014A (en
Inventor
조명수
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현대 파워텍 주식회사
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Priority to KR1020150181283A priority Critical patent/KR101815837B1/en
Publication of KR20170073014A publication Critical patent/KR20170073014A/en
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Publication of KR101815837B1 publication Critical patent/KR101815837B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/48—Inputs being a function of acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
    • F16H59/54—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the brakes, e.g. parking brakes
    • 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
    • B60Y2400/30—Sensors
    • B60Y2400/304—Acceleration sensors

Abstract

An electric oil pump control apparatus and method for an automatic transmission are disclosed. An electric oil pump control device of an automatic transmission according to the present invention comprises: a vehicle speed sensor for sensing a vehicle speed; A brake negative pressure sensor for detecting a negative pressure state of the brake; A battery sensor for detecting a state of charge of the battery; An excel position sensor for sensing the position of the accelerator pedal; An EOP driver for driving the electric oil pump; And brake negative pressure sensor, battery sensor and excel position sensor, respectively, set negative pressure state of vehicle speed and brake, charge state of battery and position of accelerator pedal. And a control unit for turning off the engine through the engine control unit and stopping driving of the electric oil pump through the EOP driving unit when the driving of the vehicle is stopped below the set vehicle speed and for restarting the engine through the engine control unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric oil pump control apparatus for an automatic transmission,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric oil pump control apparatus and method for an automatic transmission, and more particularly, to an electric oil pump control apparatus and method for an automatic transmission, The present invention relates to an electric oil pump control apparatus and method for an automatic transmission in which an oil pump is provided.

Generally, a vehicle equipped with an automatic transmission controls an oil pressure in a shift range set in accordance with the running speed of the vehicle and the amount of throttle opening, so that the automatic transmission can be operated by automatically shifting the transmission to the target.

Therefore, in a vehicle equipped with an automatic transmission whose operating state is controlled according to the hydraulic pressure, there is no need to operate a clutch pedal for interrupting the power to the engine in order to vary the operating state of the corresponding shift gear, And the engine stall due to the malfunction of the driver during running or the inexperience of running does not occur. Therefore, even in the case of a novice, the operation can be facilitated.

On the other hand, at the time of driving of the vehicle, the amount of air sucked into the engine is decreased and the engine speed is increased. In this case, the fuel is not injected through the fuel cut control in a state where the damper clutch is directly connected, The fuel consumption can be prevented from being unnecessarily consumed and the fuel economy can be improved. In addition, the direct connection of the damper clutch is continued with respect to the downshift before stop to maximize the direct coupling area of the damper clutch have.

In recent years, an idle stop & go (ISG) system has been applied to stop the engine during stopping to improve fuel economy. However, in order to supply hydraulic pressure to the automatic transmission under the restart condition after stopping, An oil pump controller, a reinforced starter, a brake negative pressure sensor, a reinforced battery and a battery sensor.

Related prior arts are Korean Patent Laid-Open Publication No. 2015-0071486 (June 26, 2016) entitled " Electric oil pump control device and method for automatic transmission ".

In this way, the damper clutch is directly connected during the driving of the vehicle, and the fuel efficiency is improved through the fuel control. However, there is a problem in that the driving range of the engine reverse drive and the mechanical oil pump is large compared with the fuel efficiency improvement effect.

Further, in order to improve the fuel efficiency by applying the ISG system, not only the additional cost is increased, but also it is not utilized in the high speed mode.

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 an automatic transmission which is capable of performing the present stage maintenance and lubrication function of an automatic transmission The present invention provides an electric oil pump control apparatus and method for an automatic transmission.

An electric oil pump control apparatus for an automatic transmission according to an aspect of the present invention includes: a vehicle speed sensor for sensing a vehicle speed; A brake negative pressure sensor for detecting a negative pressure state of the brake; A battery sensor for detecting a state of charge of the battery; An excel position sensor for sensing the position of the accelerator pedal; An EOP driver for driving the electric oil pump; And brake negative pressure sensor, battery sensor and excel position sensor, respectively, set negative pressure state of vehicle speed and brake, charge state of battery and position of accelerator pedal. And a control unit for turning off the engine through the engine control unit and stopping the driving of the electric oil pump through the EOP driving unit when the driving of the vehicle is less than the set vehicle speed and for restarting the engine through the engine control unit, When the vehicle speed is equal to or higher than the set vehicle speed, when the negative pressure state of the brake is normal, when the charged state of the battery is equal to or higher than the reference value, and when the accelerator pedal is turned off, the engine is turned off to drive the electric oil pump, In the case where the vehicle speed is less than the vehicle speed and the negative pressure state of the brake is abnormal, If the state of charge is less than the reference value, and at least one of when the accelerator is turned on and even when restarting the content engine is characterized in that for stopping the driving of the electric oil pump.

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A method of controlling an electric oil pump of an automatic transmission according to another aspect of the present invention is a method for controlling an electric oil pump of an automatic transmission, the control method comprising the steps of: detecting a vehicle speed from a vehicle speed sensor, a brake negative pressure sensor, a battery sensor and an excel position sensor, Receiving a position; Determining a driving state of the vehicle based on the input vehicle speed, the negative pressure of the brake, the state of charge of the battery, and the position of the accelerator pedal; And controlling the engine starting state and the operation of the electric oil pump in accordance with the driving state of the vehicle based on the driving state of the vehicle, wherein the step of controlling the engine starting state and the operation of the electric oil pump in accordance with the driving state of the vehicle, When the negative pressure state of the brake is normal, when the charged state of the battery is equal to or higher than the reference value, and when the accelerator pedal is turned off, the engine is turned off and the electric oil pump is driven, When the negative pressure state of the brake is abnormal, when the state of charge of the battery is less than the reference value, or when at least one of the cases where the accelerator pedal is turned on is satisfied, the engine is restarted and the driving of the electric oil pump is stopped .

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An apparatus and method for controlling an electric oil pump of an automatic transmission according to an aspect of the present invention includes: an engine oil pump for controlling an engine oil pump The fuel consumption can be improved by reducing the load during driving of the vehicle running at a high speed.

1 is a block diagram showing an electric oil pump control apparatus of an automatic transmission according to an embodiment of the present invention.
2 is a flowchart illustrating an electric oil pump control method for an automatic transmission according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electric oil pump control apparatus and method of an automatic transmission according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing an electric oil pump control apparatus of an automatic transmission according to an embodiment of the present invention.

1, the electric oil pump control apparatus for an automatic transmission according to an embodiment of the present invention includes a vehicle speed sensor 10, a brake negative pressure sensor 20, a battery sensor 30, an excel position sensor 40, An EOP driver 70, and a controller 50.

The vehicle speed sensor 10 senses the traveling vehicle speed of the vehicle and provides it to the control unit 50.

The brake negative pressure sensor 20 senses the negative pressure state of the negative pressure booster (not shown) and provides it to the control unit 50.

The battery sensor 30 senses the charged state of the battery (not shown) and provides the sensed state to the controller 50.

The excel position sensor 40 senses the position of the accelerator pedal (not shown) and provides it to the controller 50 so that the input torque can be calculated based on the position of the accelerator pedal. In addition, it is possible to determine whether the accelerator pedal is depressed through the on / off state of the excel position sensor 40.

The EOP (Electrical Oil Pump) drive unit 70 drives the electric oil pump 80 at the set RPM.

The control unit 50 determines the negative pressure state of the vehicle speed and the brake from the vehicle speed sensor 10, the brake negative pressure sensor 20, the battery sensor 30 and the excel position sensor 40, When the vehicle speed is equal to or higher than the set vehicle speed and the negative pressure state of the brake is normal and the state of charge of the battery is equal to or higher than the reference value and the accelerator pedal is in the OFF state by inputting the state of charge and the position of the accelerator pedal, The EOP driving unit 70 drives the electric oil pump 80 and turns off the engine through the engine control unit 60.

Further, the controller 50 determines whether the vehicle speed is less than the set vehicle speed, the negative pressure state of the brake is abnormal, the battery charging state is less than the reference value, or the accelerator pedal is turned on It is determined that the driving of the electric vehicle is released, and the engine is restarted, and the driving of the electric oil pump 80 is stopped.

As described above, according to the electric oil pump control apparatus for an automatic transmission according to the embodiment of the present invention, the engine start is turned off and the electric oil pump is driven at the time of driving of the vehicle to perform the current stage maintenance and lubrication function of the automatic transmission So that the fuel consumption can be improved by reducing the load during driving of the vehicle at high speed.

2 is a flowchart illustrating an electric oil pump control method for an automatic transmission according to an embodiment of the present invention.

2, in the method of controlling the electric oil pump of the automatic transmission according to the embodiment of the present invention, the control unit 50 controls the vehicle speed sensor 10, the brake negative pressure sensor 20, the battery sensor 30, (Negative pressure state of the brake), the state of charge of the battery, and the position of the accelerator pedal from the accelerator position sensor 40 (S10).

That is, the control unit 50 determines the driving state and the released state at the time of high-speed traveling on the basis of the vehicle speed, the brake negative pressure state, the battery charging state, and the position of the accelerator pedal.

Therefore, the control unit 50 determines whether the vehicle speed is equal to or higher than the set vehicle speed based on the vehicle speed, the brake negative pressure state, the battery charging state, and the position of the accelerator pedal inputted in the step S10 and the negative pressure state of the brake is normal, Or more and the accelerator pedal is in the off state (S20).

When the conditions for the vehicle speed, the brake negative pressure state, the battery charging state, and the accelerator pedal state are both satisfied in step S20, the controller 50 determines that the vehicle is driving, And turns off the engine through the engine control unit 60 (S30).

At this time, the control unit 50 outputs an off signal of the engine to the engine control unit 60 through the CAN communication, so that the engine can be turned off.

As described above, the load during driving of the vehicle at high speed can be reduced to improve the fuel efficiency.

In contrast, if the vehicle does not satisfy the vehicle driving condition at step S20, the control unit switches to step S10 so that the vehicle speed sensor 10, the brake negative pressure sensor 20, the battery sensor 30, The negative pressure state of the brake, the charged state of the battery, and the position of the accelerator pedal.

On the other hand, in a state where the engine is turned off by the driving of the vehicle in step S30 and the electric oil pump is driven, the control unit determines the vehicle speed, the negative pressure of the brake, the state of charge of the battery and the state of the accelerator pedal, It is determined whether any one of the negative pressure state is abnormal, the battery charging state is less than the reference value, or the accelerator pedal is on (S40).

If it is determined in step S40 that any of the conditions for the vehicle speed, the brake negative pressure state, the battery charging state, and the accelerator pedal state is satisfied, the control unit 50 determines that the vehicle is in the power running state, The engine is restarted and the driving of the electric oil pump 80 is stopped through the EOP driving unit 70 (S50).

That is, when the driver depresses the brake pedal or depresses the accelerator pedal, or if the charge state of the battery is less than the reference value or the vehicle speed is reduced to less than the set vehicle speed, the control unit 50 restarts the engine, .

On the other hand, if it is determined in step S40 that the driving state of the vehicle is released, if the driving of the vehicle is not canceled, the control unit 50 proceeds to step S30 to maintain the driving state.

As described above, according to the electric oil pump control method of the automatic transmission according to the embodiment of the present invention, the engine start is turned off when the vehicle is running, and the electric oil pump is driven to perform the current stage maintenance and lubrication function of the automatic transmission So that the fuel consumption can be improved by reducing the load during driving of the vehicle at high speed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: vehicle speed sensor 20: brake negative pressure sensor
30: Battery sensor 40: Excel position sensor
50: control unit 60: engine control unit
70: EOP driving part 80: electric oil pump

Claims (6)

A vehicle speed sensor for detecting a vehicle speed;
A brake negative pressure sensor for detecting a negative pressure state of the brake;
A battery sensor for detecting a state of charge of the battery;
An excel position sensor for sensing the position of the accelerator pedal;
An EOP driver for driving the electric oil pump; And
A negative pressure state of the vehicle speed and the brake, a charged state of the battery, and a position of the accelerator pedal from the vehicle speed sensor, the brake negative pressure sensor, the battery sensor, and theexcel position sensor, The EOP controller drives the electric oil pump through the EOP driver and turns off the engine through the engine controller. When the driving force of the vehicle is less than the set vehicle speed, the driving of the electric oil pump is stopped through the EOP driver, And a control unit for restarting the operation unit,
The control unit turns off the engine when the negative pressure state of the brake is normal, when the charged state of the battery is equal to or higher than the reference value, and when the accelerator pedal is turned off, when the vehicle speed is equal to or higher than the set vehicle speed Driving the electric oil pump,
The engine is restarted when the vehicle speed is less than the set vehicle speed, when the negative pressure state of the brake is abnormal, when the charged state of the battery is less than the reference value, and when the accelerator pedal is turned on, And the driving of the electric oil pump is stopped.
delete delete The control unit receiving a vehicle speed, a negative pressure state of the brake, a charged state of the battery, and a position of the accelerator pedal from the vehicle speed sensor, the brake negative pressure sensor, the battery sensor and the excel position sensor, respectively;
Determining a driving state of the vehicle based on the vehicle speed, the brake negative pressure state, the charged state of the battery, and the position of the accelerator pedal input by the controller; And
Wherein the control unit controls the engine starting state and the operation of the electric oil pump according to the driving state of the vehicle,
Wherein the step of controlling the engine starting state and the operation of the electric oil pump according to the power running state comprises:
The control unit turns off the engine when the vehicle speed is equal to or higher than the set vehicle speed, when the negative pressure state of the brake is normal, when the charged state of the battery is equal to or higher than the reference value, Driving the pump,
When the vehicle speed is less than the set vehicle speed, when the negative pressure state of the brake is abnormal, when the charging state of the battery is less than the reference value, and when the accelerator pedal is turned on, the engine is restarted, And stopping the driving of the pump. delete delete
KR1020150181283A 2015-12-17 2015-12-17 Apparatus for controlling electric oil pump of automatic transmission and method thereof KR101815837B1 (en)

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KR101815837B1 true KR101815837B1 (en) 2018-01-12

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Publication number Priority date Publication date Assignee Title
KR20190121541A (en) 2018-04-18 2019-10-28 현대자동차주식회사 Lubrication system for automatic tarnsmission

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013204625A (en) * 2012-03-27 2013-10-07 Toyota Motor Corp Control device for vehicle
KR101576371B1 (en) * 2014-06-11 2015-12-10 고성석 Intelligent idle stop and go control device and method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013204625A (en) * 2012-03-27 2013-10-07 Toyota Motor Corp Control device for vehicle
KR101576371B1 (en) * 2014-06-11 2015-12-10 고성석 Intelligent idle stop and go control device and method thereof

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