KR101640132B1 - 4WD motor pump control method for 4WD vehicle having ISG system - Google Patents

4WD motor pump control method for 4WD vehicle having ISG system Download PDF

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Publication number
KR101640132B1
KR101640132B1 KR1020150151620A KR20150151620A KR101640132B1 KR 101640132 B1 KR101640132 B1 KR 101640132B1 KR 1020150151620 A KR1020150151620 A KR 1020150151620A KR 20150151620 A KR20150151620 A KR 20150151620A KR 101640132 B1 KR101640132 B1 KR 101640132B1
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KR
South Korea
Prior art keywords
motor pump
wheel drive
control duty
isg
control
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Application number
KR1020150151620A
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Korean (ko)
Inventor
임항규
Original Assignee
현대위아 주식회사
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Priority to KR1020150151620A priority Critical patent/KR101640132B1/en
Application granted granted Critical
Publication of KR101640132B1 publication Critical patent/KR101640132B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/348—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed
    • B60K17/35—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed including arrangements for suppressing or influencing the power transfer, e.g. viscous clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
    • H02P1/52—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by progressive increase of frequency of supply to motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The present invention relates to a method for controlling a four wheel drive (4WD) motor pump and, more specifically, to a method for controlling a 4WD motor pump of a 4WD vehicle having an idle stop and go (ISG) system, which successively increases the duty of a motor pump for distributing four-wheel driving force when an ISG system of a 4WD vehicle is activated and then deactivated, thereby preventing noise and improving riding comfort.

Description

[0001] The present invention relates to a four-wheel drive motor pump control method for a four-wheel drive vehicle equipped with an ISG function,

The present invention relates to a control method of a four-wheel drive motor pump, and more particularly, to a control method of a four-wheel drive motor pump when an idle stop & go (ISG) function of a four- The present invention relates to a four-wheel drive motor pump control method for a four-wheel drive vehicle equipped with an ISG function capable of sequentially increasing a duty of a motor pump for distribution to prevent noise generation of a vehicle and improve ride comfort.

ISG (Idle Stop & Go) refers to the point at which the engine is automatically stopped when the vehicle stops while the vehicle is stopped and the vehicle is restarted from the stop state (when the driver releases the brake pedal or presses the accelerator pedal for the purpose of reducing fuel consumption and CO 2 emissions ) Automatically restarts the engine.

The four-wheel drive system is a system that can improve the driving performance of the vehicle by distributing the driving forces of the front and rear wheels. In general, it supplies hydraulic pressure generated by the rotation of the motor pump to the clutch for driving force distribution, compresses the oil pressure, Whereby the forward and rearward driving forces are distributed according to the running state.

When the ISG function is activated and the engine is stopped when the four-wheel drive vehicle is equipped with the ISG function, when the motor pump that supplies the hydraulic pressure to the clutch is stopped and the ISG function is de-activated, The pump is rotated to supply the hydraulic pressure to the clutch so as to be driven by the four-wheel drive.

FIG. 1 shows an outline of a motor pump control of a four-wheel drive vehicle equipped with a conventional ISG function. First, the operation of the ISG is sensed (S10) and the ISG motion sensing signal is transmitted to the 4WD controller (S20). Next, the 4WD control unit transmits a previously calculated command value control duty to the motor pump driving unit (S30), and the motor pump driving unit drives the motor pump with the input control duty (S40).

Here, when the ISG function is activated, the 4WD control unit outputs a control duty of '0', and when the ISG function is deactivated, the 4WD control unit rapidly rotates the motor pump to raise the oil pressure to the set value oil pressure.

That is, the conventional 4WD control unit controls the motor pump only with reference to the active or inactive signal of the ISG function.

2 (a), 2 (b) and 2 (c) illustrate waveforms of a vehicle at the time of controlling a motor pump of a conventional four-wheel drive vehicle. FIG. 2A shows a brake pedal signal, (D) is the engine speed (rpm), (e) is the control duty, and (f) is the hydraulic pressure signal of the motor pump.

As can be seen from FIG. 2, when the ISG function is activated and then deactivated, the control duty of the conventional four-wheel drive vehicle rises sharply and the hydraulic pressure rapidly increases due to the sudden rotation of the motor pump.

In this case, there is a problem that noise due to the rotation of the motor pump is generated, which may cause an uncomfortable feeling to the driver and the occupant.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to increase the rotation of a hydraulic pump sequentially in consideration of a brake pedal signal, an accelerator pedal signal, an ISG signal, And a control method of a four-wheel drive motor pump capable of minimizing abrupt vibration and noise generation while improving responsiveness and preventing deterioration of driving performance.

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.

In order to achieve the above object, the present invention provides a method for controlling a four-wheel drive motor pump for distributing drive power of a four-wheel drive vehicle equipped with an ISG function, wherein when the ISG function is active, So that the control duty of the control unit becomes '0'; Monitoring whether the brake pedal is 'off' and operating the motor pump with a first control duty when the brake pedal is 'off'; And operating the motor pump with a second control duty greater than the first control duty when the ISG function is de-activated. do.

In a preferred embodiment, after the step of operating the motor pump with the second control duty, if the engine speed is increased beyond the predetermined threshold speed, The method comprising the steps of:

Operating the motor pump with a normal control duty when the accelerator pedal value is greater than or equal to a predetermined critical accelerator pedal value after the step of operating the motor pump with the third control duty .

Further, the present invention further provides a four-wheel drive vehicle for controlling a motor pump for distributing a driving force by a control method of the four-wheel drive motor pump.

The present invention further provides a computer program stored in a medium for performing the four-wheel drive motor pump control method in combination with a four-wheel drive controller.

The present invention has the following excellent effects.

According to the control method of the four-wheel drive motor pump of the present invention, since the duty of the motor pump can be gradually increased by using the brake pedal signal, the accelerator pedal value, the ISG signal, and the engine speed in combination, the sudden vibration and noise Can be prevented.

According to the four-wheel drive motor pump control method of the present invention, it is possible to control the duty of the motor pump in accordance with the brake pedal signal, the accelerator pedal value, the ISG signal and the engine speed, Since the motor pump is rotated, it is possible to prevent deterioration of the driving performance.

1 is a view showing an outline of a motor pump control of a four-wheel drive vehicle equipped with a conventional ISG function,
FIG. 2 is a view showing a waveform of a vehicle at the time of controlling a motor pump of a conventional four-wheel drive vehicle,
3 is a view showing an outline of control of a four-wheel drive motor pump according to an embodiment of the present invention,
4 is a flowchart of a method of controlling a four-wheel drive motor pump according to an embodiment of the present invention,
FIG. 5 is a view showing waveforms of a vehicle at the time of controlling a four-wheel drive motor pump according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

Referring to FIG. 1, a four-wheel drive motor pump control method according to an embodiment of the present invention includes a brake pedal on / off signal, an ISG motion detection signal, an engine speed output signal, (S100). The control unit of the 4WD controller outputs the set motor duty to the motor pump driving unit (S200). The motor pump driving unit drives the motor pump with the duty motor duty (S3000) And the hydraulic pressure is supplied to the clutch for four-wheel drive power distribution (S400).

That is, in comparison with the conventional four-wheel drive motor pump control method shown in FIG. 1, instead of using only the ISG motion detection signal, the brake pedal on / off signal, the engine speed output signal, And controls the motor pump.

In addition, the 4WD controller stores a computer program for performing the four-wheel drive motor pump control method according to an embodiment of the present invention.

In addition, the computer program may be separately stored in a recording medium, and the recording medium may be designed and configured specifically for the present invention or may be known and used by those having ordinary skill in the computer software, Examples of the optical recording medium include a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical recording medium such as a CD and a DVD, a magnetic-optical recording medium capable of combining magnetic and optical recording, a ROM, Lt; RTI ID = 0.0 > and / or < / RTI >

In addition, the computer program may be a program consisting of program commands, local data files, local data structures, etc., alone or in combination, and may be executed by a computer using an interpreter or the like as well as machine code Lt; RTI ID = 0.0 > language code. ≪ / RTI >

Hereinafter, a four-wheel drive motor pump control method according to an embodiment of the present invention will be described in detail with reference to FIG.

Referring to FIG. 4, the four-wheel drive motor pump control method according to an embodiment of the present invention firstly monitors whether the ISG function is active (state in which the engine is turned off when the vehicle is stationary) (S1000) When the ISG function is activated by depressing the pedal (brake pedal 'ON'), the control duty of the motor pump is set to '0' (S1100), thereby stopping the operation of the motor pump.

In this case, the hydraulic pressure supplied to the clutch for four-wheel drive is attenuated to a predetermined attenuation rate and becomes '0'.

Next, when the driver releases his / her foot from the brake pedal (brake pedal 'off') (S2000), the motor pump is operated with the first control duty (S2100).

This is because, when the ISG function is deactivated, the motor pump is operated in a predetermined control duty in advance when the brake pedal is turned " off "

Next, if the ISG function is deactivated (S3000), the motor pump is operated with a second control duty which is greater than the first control duty (S3100).

Next, it is monitored whether the number of revolutions of the engine rpm increases and the number of revolutions of the engine increases to a predetermined threshold number of revolutions or more (S4000). If the number of revolutions of the engine becomes equal to or more than the threshold number of revolutions The motor pump is driven with a third control duty which is greater than the control duty (S4100).

Next, it is monitored whether the accelerator pedal value (acceleration pedal opening rate) is greater than a predetermined critical accelerator pedal value (S5000). If the accelerator pedal value is greater than the critical accelerator pedal value, The motor pump is driven with duty (S5100).

5 is a waveform diagram of a vehicle when controlling a four-wheel drive motor pump according to an embodiment of the present invention. As shown in FIG. 5, when the brake pedal is turned 'off' The pump is started, the motor pump is driven at the second control duty at the time d2 at which the ISG function is deactivated, and the motor is driven at the third control duty at the time d3 at which the engine speed is at the predetermined critical engine speed, The pump is driven, and the motor pump is driven to the normal control duty at the time (d4) at which the accelerator pedal value becomes equal to or higher than the predetermined accelerator pedal value.

That is, the control duty (c) of the motor pump gradually increases from the time when the brake pedal is turned 'off', and accordingly, the hydraulic pressure d gradually increases at the time d2 at which the ISG is deactivated.

Therefore, according to the control method of the four-wheel drive motor pump according to the embodiment of the present invention, not only the ISG signal is used but the brake pedal, the ISG signal, the engine speed, The control duty can be increased stepwise so that rapid noise and vibration do not occur. On the other hand, since the motor pump is operated from the time when the brake pedal is turned " off ", the degradation of the responsiveness can be prevented, .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

Claims (5)

A method of controlling a four-wheel drive motor pump for distributing drive power of a four-wheel drive vehicle equipped with an ISG (Idle Stop & Go)
Making the control duty of the motor pump 0 when the ISG function is active;
Monitoring whether the brake pedal is 'off' and operating the motor pump with a first control duty when the brake pedal is 'off'; And
And operating the motor pump with a second control duty greater than the first control duty when the ISG function is de-activated.
The method according to claim 1,
After the step of operating the motor pump with the second control duty,
And operating the motor pump with a third control duty greater than the second control duty if the engine speed increases to a predetermined threshold speed or more.
3. The method of claim 2,
After the step of operating the motor pump with the third control duty,
And operating the motor pump with a normal control duty when the accelerator pedal value is equal to or greater than a predetermined critical accelerator pedal value.
A four-wheel drive vehicle for controlling a motor pump for distributing a driving force by a control method of the four-wheel drive motor pump according to any one of claims 1 to 3.
A computer program stored in a medium for performing the four-wheel drive motor pump control method according to any one of claims 1 to 3, in combination with a four-wheel drive controller.




KR1020150151620A 2015-10-30 2015-10-30 4WD motor pump control method for 4WD vehicle having ISG system KR101640132B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150151620A KR101640132B1 (en) 2015-10-30 2015-10-30 4WD motor pump control method for 4WD vehicle having ISG system

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Application Number Priority Date Filing Date Title
KR1020150151620A KR101640132B1 (en) 2015-10-30 2015-10-30 4WD motor pump control method for 4WD vehicle having ISG system

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KR101640132B1 true KR101640132B1 (en) 2016-07-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012154392A (en) * 2011-01-25 2012-08-16 Mazda Motor Corp Controller for automatic transmission
KR101393585B1 (en) * 2012-12-27 2014-05-09 현대자동차 주식회사 Idle stop and go control device for vehicle and method thereof
KR20140065650A (en) * 2012-11-19 2014-05-30 현대자동차주식회사 Engine restart control system for vehicle and method thereof
JP5862042B2 (en) * 2010-06-28 2016-02-16 マツダ株式会社 Idle stop control device for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5862042B2 (en) * 2010-06-28 2016-02-16 マツダ株式会社 Idle stop control device for vehicle
JP2012154392A (en) * 2011-01-25 2012-08-16 Mazda Motor Corp Controller for automatic transmission
KR20140065650A (en) * 2012-11-19 2014-05-30 현대자동차주식회사 Engine restart control system for vehicle and method thereof
KR101393585B1 (en) * 2012-12-27 2014-05-09 현대자동차 주식회사 Idle stop and go control device for vehicle and method thereof

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