KR20150014163A - Oil pressure supply system of automatic transmission - Google Patents

Oil pressure supply system of automatic transmission Download PDF

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Publication number
KR20150014163A
KR20150014163A KR1020130089488A KR20130089488A KR20150014163A KR 20150014163 A KR20150014163 A KR 20150014163A KR 1020130089488 A KR1020130089488 A KR 1020130089488A KR 20130089488 A KR20130089488 A KR 20130089488A KR 20150014163 A KR20150014163 A KR 20150014163A
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KR
South Korea
Prior art keywords
pressure
low
hydraulic pressure
passage
hydraulic
Prior art date
Application number
KR1020130089488A
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Korean (ko)
Inventor
위태환
김기동
이경무
Original Assignee
현대자동차주식회사
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Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020130089488A priority Critical patent/KR20150014163A/en
Publication of KR20150014163A publication Critical patent/KR20150014163A/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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefore
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4008—Control of circuit pressure
    • F16H61/4026—Control of low pressure
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H2061/0046—Details of fluid supply channels, e.g. within shafts, for supplying friction devices or transmission actuators with control fluid

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

A hydraulic supply system for an automatic transmission for a vehicle is disclosed. The hydraulic pressure supply system of the automatic transmission for a vehicle according to the embodiment of the present invention is characterized in that the hydraulic pressure generated in the first and second pump chambers of the oil pump composed of the vane pump is divided into a low pressure portion (torque converter, cooling and lubrication) A high pressure passage for supplying the hydraulic pressure discharged from the first pump chamber to the high pressure portion; A switch valve for selectively supplying the hydraulic pressure discharged from the second pump chamber to the high-pressure passage and the first low-pressure passage under the control of the first solenoid valve; Pressure regulator valve that stably controls the hydraulic pressure supplied to the first low-pressure passage under the control of the second solenoid valve and supplies the oil pressure to the low-pressure portion through the second low-pressure passage; A high-pressure regulator valve that stably controls the hydraulic pressure supplied to the high-pressure passage according to the control of the second solenoid valve and supplies the high-pressure portion to the high-pressure portion; And a recirculation passage formed to supply the recirculation hydraulic pressure of the high-pressure regulator valve to the low-pressure portion.

Description

Technical Field [0001] The present invention relates to a hydraulic supply system for an automatic transmission for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic pressure supply system for an automotive automatic transmission, and more particularly, to a hydraulic pressure supply system for a vehicular automatic transmission in which a recirculating hydraulic pressure is supplied to a low- The present invention relates to a hydraulic supply system for a vehicular automatic transmission in which the RPM can be lowered to improve fuel economy.

The oil pump applied to the hydraulic control system of an automatic transmission for a vehicle is mainly a gear pump. In recent years, a vane pump capable of supplying a sufficient flow rate even in a low rotation range is sometimes applied.

Since the vane pump increases the discharge amount in proportion to the number of revolutions, if a sufficient flow rate can be ensured in the low-revolving region, an unnecessarily large amount of flow is supplied in the high-revolving region.

Accordingly, the vane pump can form the first and second pump chambers at axially symmetric positions of the rotor so as to recirculate the surplus flow rate in the high rotation region, so that the vane pump can be used as the main pump chamber and the sub pump chamber.

The first pump chamber is a main pump chamber, and the hydraulic pressure generated in the first pump chamber is continuously supplied to the transmission portion (friction member, torque converter, cooling, lubrication, etc.).

The second pump chamber is a sub pump chamber, and the hydraulic pressure generated in the second pump chamber is supplied or recirculated to the transmission portion as necessary.

More specifically, the high-pressure fluid generated in the first pump chamber and the second pump chamber is sufficiently supplied to the speed change portion in the low-rotation region, and the hydraulic pressure generated in the second pump chamber is recirculated to the surplus flow rate in the high- And to improve fuel efficiency.

Fig. 1 shows a hydraulic supply system of a conventional automatic transmission for a vehicle to which a vane pump is applied, and shows a fluid flow in a full discharge mode.

Referring to FIG. 1, the vane pump includes a first pump chamber 4 and a second pump chamber 6 at axially symmetric positions of the rotor 2.

The first pump chamber 4 and the second pump chamber 6 have first and second suction ports 4a and 6a and first and second discharge ports 4b and 6b, And the second suction ports 4a and 6a are connected to the oil pan 8 through the first and second suction passages 4c and 6c and the first and second discharge ports 6b and 6b Are connected to the transmission portion 10 through the first and second discharge passages 4d and 6d, respectively.

A switch valve 12 controlled by a solenoid valve SOL is disposed on the second discharge passage 6d.

The switch valve 12 selectively serves to shut off the second discharge flow passage 6d and the upstream side of the second discharge flow passage 6d is connected to the recirculation flow path 14 when the second discharge flow passage 6d is closed To be connected.

Accordingly, in the low rotation range, the hydraulic pressures generated in the first and second pump chambers (4) and (6) And is supplied to the transmission portion 10 through the second discharge flow paths 4d and 6d.

2 shows a hydraulic supply system of a conventional automatic transmission for a vehicle to which a vane pump is applied, and shows a fluid flow in a semi-discharge mode.

Referring to FIG. 2, when the hydraulic pressure is to be discharged from the second pump chamber 6 in the high rotation region, the solenoid valve SOL controls the switch valve 12 to block the second discharge flow passage 6d.

The hydraulic pressure generated in the second pump chamber 6 is recirculated through the switch valve 12 and the recirculation passage 14 so that only the hydraulic pressure generated in the first pump chamber 4 is supplied to the transmission portion 10, The pump loss due to the hydraulic pressure generation can be reduced.

However, in the conventional hydraulic pressure supply system as described above, in the semi-discharge mode in the high-speed region, the total required flow rate necessary for the transmission is satisfied only by the hydraulic pressure generated in the first pump room 4, , The required flow rate is increased at the time of increasing the temperature of the oil, and the semi-discharge entry RPM must be further increased.

The embodiment of the present invention can improve the fuel efficiency by lowering the RPM entering the semi-discharge mode by supplying the recirculation hydraulic pressure to the low-pressure portion to increase the flow rate of the low-pressure portion and lowering the hydraulic pressure of the low- To provide a hydraulic supply system for an automatic transmission.

In one or more embodiments of the present invention, the oil pressure generated in the first and second pump chambers of the oil pump is supplied to the low pressure portion (torque converter, cooling and lubrication) and the high pressure portion (friction member) A high-pressure line for supplying the hydraulic pressure discharged from the first pump chamber to the high-pressure portion; A switch valve for selectively supplying the hydraulic pressure discharged from the second pump chamber to the high-pressure passage and the first low-pressure passage under the control of the first solenoid valve; Pressure regulator valve that stably controls the hydraulic pressure supplied to the first low-pressure passage under the control of the second solenoid valve and supplies the oil pressure to the low-pressure portion through the second low-pressure passage; A high-pressure regulator valve that stably controls the hydraulic pressure supplied to the high-pressure passage according to the control of the second solenoid valve and supplies the high-pressure portion to the high-pressure portion; And a recirculation flow path formed to supply the recirculation hydraulic pressure of the high-pressure regulator valve to the low-pressure portion. The present invention also provides a hydraulic pressure supply system for a vehicular automatic transmission.

The downstream end of the recirculation passage of the high-pressure regulator valve may be connected to the first low-pressure passage.

The downstream end of the recirculation passage of the high-pressure regulator valve may be connected to the second low-pressure passage.

In the embodiment of the present invention, all of the hydraulic pressures generated in the first and second pump chambers of the vane pump are supplied to the high-pressure portion in the low-rotation region (full-discharge mode) And the hydraulic pressure generated in the second pump chamber is supplied to the low-pressure portion.

Accordingly, the flow rate of the low-pressure portion is increased in the high-rotation region (semi-discharge mode) and the required flow rate of the high-pressure portion is smaller than that of the conventional art.

In addition, by lowering the hydraulic pressure of the low-pressure portion in conjunction with the high-pressure portion, the load of the low-pressure portion can be reduced to reduce the drag loss of the vane pump.

1 is a configuration diagram of a conventional hydraulic pressure supply system, which is a fluid flow chart in a full discharge mode.
2 is a configuration diagram of a conventional hydraulic pressure supply system, which is a fluid flow chart in a semi-discharge mode.
3 is a configuration diagram of a hydraulic pressure supply system according to the first embodiment of the present invention, which is a fluid flow chart in the full discharge mode.
4 is a block diagram of a hydraulic pressure supply system according to a first embodiment of the present invention, which is a fluid flow chart in a semi-discharge mode.
FIG. 5 is a configuration diagram of a hydraulic pressure supply system according to a second embodiment of the present invention, which is a fluid flow chart in the full discharge mode.
FIG. 6 is a configuration diagram of a hydraulic pressure supply system according to a second embodiment of the present invention, which is a fluid flow chart in a semi-discharge mode.

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

In order to clearly illustrate the present embodiment, portions not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In the following description, the names of the components are denoted by the first, second, etc. in order to distinguish them from each other because the names of the components are the same and are not necessarily limited to the order.

3 is a configuration diagram of a hydraulic pressure supply system according to the first embodiment of the present invention, which is a fluid flow chart in the full discharge mode.

3, the hydraulic pressure supply system according to the first embodiment of the present invention separates the low pressure part LP and the high pressure part HP so that the hydraulic pressure generated by the oil pump is divided into the low pressure part LP and the high pressure part HP, , Or can be supplied only to the high-pressure part (HP).

The low pressure portion LP means a portion that is controlled and supplied to a low degree of pressure that smoothes the operation of the torque converter T / C and cooling and lubrication, and the high pressure portion HP selectively operates Quot; means a portion that is controlled and supplied at a high enough pressure to smoothly operate a plurality of friction members.

The hydraulic pressure supply system according to the first embodiment of the present invention, which is constituted by the low pressure portion LP and the high pressure portion HP as described above, includes the oil pump 20, the switch valve 22, the low pressure regulator valve 24, And a high-pressure regulator valve (26).

The oil pump 20 is a vane pump in which a first pump chamber 201 and a second pump chamber 202 are formed at axially symmetric positions of the rotor 200. The first pump chamber 201 and the second pump chamber 202 Respectively hold the first and second suction ports 201a and 202a and the first and second discharge ports 201b and 202b, respectively.

The first and second suction ports 201a and 202a are connected to the oil pan P through the first and second suction passages 201c and 202c and the first and second discharge ports 201b ) 202b are connected to the first and second discharge passages 201d and 202d, respectively.

The first discharge passage 201d is connected to the high pressure portion HP through a high pressure passage 28 and the second discharge passage 202d is connected to a first low pressure passage 30 via a switch valve 22, Pressure regulator valve 24 through the circulation flow path 32 or the high-pressure flow path 28 through the circulation flow path 32.

The switch valve 22 is configured to selectively connect the second discharge passage 202d to the first low-pressure passage 30 and the circulation passage 32 while being controlled by the first solenoid valve SOL1.

The low pressure regulator valve 24 is controlled by the second solenoid valve SOL2 to control the hydraulic pressure supplied to the low pressure portion LP and the recirculation hydraulic pressure generated in the control process is recirculated to the oil pan P .

The regulator valve 26 controls the hydraulic pressure supplied to the high pressure part HP while being controlled by the second solenoid valve SOL2 and the recirculated hydraulic pressure generated in the control process is supplied to the high- Pressure regulator valve 24 and the second low-pressure flow path 36 connecting the low-pressure portion LP.

In the hydraulic pressure supply system according to the first embodiment of the present invention configured as described above, the first solenoid valve SOL1 is turned off while the first solenoid valve 22 And the second discharge passage 202d are connected to the circulation passage 32. [

Accordingly, the hydraulic pressures generated in the first and second pump chambers 201 and 202 are all the same. And is supplied to the high-pressure portion HP through the second discharge flow path 201d (202d).

4 is a configuration diagram of a hydraulic pressure supply system according to the first embodiment of the present invention, which is a fluid flow chart in a semi-discharge mode.

4, when the first solenoid valve SOL1 is turned on, the first switch valve 22 connects the second discharge passage 202d to the first low-pressure passage 30, Connect.

The hydraulic pressure generated in the first pump chamber 201 is supplied to the high pressure portion HP through the high pressure passage 28 and the hydraulic pressure generated in the second pump chamber 202 is supplied to the low pressure portion through the low pressure regulator valve 24, (LP).

Of course, the hydraulic pressure supplied to the low-pressure portion LP or the high-pressure portion HP is controlled by the low-pressure regulator valve 24 and the high-pressure regulator valve 26, The regulator valve 26 is commonly controlled by the second solenoid valve SOL2.

As described above, in the hydraulic pressure supply system according to the first embodiment of the present invention, the hydraulic pressures generated in the first and second pump chambers 201 and 202 of the oil pump 20 in the low rotation range (full discharge mode) The hydraulic pressure generated in the first pump chamber 201 is supplied to the high pressure portion HP and the hydraulic pressure generated in the second pump chamber 202 is supplied to the low pressure portion LP ).

Accordingly, the flow rate of the low-pressure portion LP is increased in the high-rotation region (semi-discharge mode) and the required flow rate of the high-pressure portion HP is smaller than that of the conventional one.

In addition, by lowering the hydraulic pressure of the low-pressure portion LP in conjunction with the high-pressure portion HP, the load of the low-pressure portion LP can be reduced to reduce the drag loss of the vane pump.

5 and 6 are diagrams showing a hydraulic pressure supply system according to a second embodiment of the present invention, wherein FIG. 5 is a fluid flow chart in a full discharge mode, and FIG. 6 is a fluid flow diagram in a half discharge mode.

5 and 6, the circulation flow path 32 is connected to the second low pressure flow path 36 in the first embodiment, but in the second embodiment, the circulation flow path 32 is connected to the first low pressure flow path 30 ).

Accordingly, in the second embodiment, the recirculating hydraulic pressure generated by the high-pressure regulator valve 26 is supplied only to the low-pressure portion LP, and only the connection on the downstream side of the circulating flow path 32 is different. A detailed description thereof will be omitted.

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, Includes all changes to the scope permitted.

20 ... oil pump
200 ... rotor
201, 202 ... first and second pump rooms
201a, 202a ... First and second suction ports
201b, 202b ... First and second discharge ports
201c, 202c ... First and second inhalation flow paths
201d, 202d ... The first and second discharge channels
22 ... switch valve
24 ... regulator valve for low pressure
26 ... High-pressure regulator valve
28 ... high pressure oil
30, 36 ... first low-pressure oil line
32 ... circulating flow path
34 ... recirculation channel
HP ... high pressure
LP ... low pressure part
SOL1, SOL2 ... 1st. The second solenoid valve

Claims (3)

(Torque converter, cooling and lubrication) and a high-pressure portion (friction member) by supplying the hydraulic pressure generated in the first and second pump chambers of the oil pump made up of the vane pump separately,
A high-pressure line for supplying the hydraulic pressure discharged from the first pump chamber to the high-pressure portion;
A switch valve for selectively supplying the hydraulic pressure discharged from the second pump chamber to the high-pressure passage and the first low-pressure passage under the control of the first solenoid valve;
Pressure regulator valve that stably controls the hydraulic pressure supplied to the first low-pressure passage under the control of the second solenoid valve and supplies the oil pressure to the low-pressure portion through the second low-pressure passage;
A high-pressure regulator valve that stably controls the hydraulic pressure supplied to the high-pressure passage according to the control of the second solenoid valve and supplies the high-pressure portion to the high-pressure portion;
A recirculation passage formed to supply recirculation hydraulic pressure of the high-pressure regulator valve to the low-pressure portion;
And the hydraulic pressure supply system of the automatic transmission for a vehicle. The method according to claim 1,
The recirculation flow path of the high-pressure regulator valve
And the downstream side end is connected to the first low-pressure flow path. The method according to claim 1,
The recirculation flow path of the high-pressure regulator valve
And the downstream side end is connected to the second low-pressure flow path.
KR1020130089488A 2013-07-29 2013-07-29 Oil pressure supply system of automatic transmission KR20150014163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130089488A KR20150014163A (en) 2013-07-29 2013-07-29 Oil pressure supply system of automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130089488A KR20150014163A (en) 2013-07-29 2013-07-29 Oil pressure supply system of automatic transmission

Publications (1)

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KR20150014163A true KR20150014163A (en) 2015-02-06

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KR1020130089488A KR20150014163A (en) 2013-07-29 2013-07-29 Oil pressure supply system of automatic transmission

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101703621B1 (en) * 2015-08-25 2017-02-07 현대자동차 주식회사 Oil pressure supply system of automatic transmission
EP3896312A1 (en) * 2020-04-15 2021-10-20 Deere & Company Hydraulic assembly for a vehicle transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101703621B1 (en) * 2015-08-25 2017-02-07 현대자동차 주식회사 Oil pressure supply system of automatic transmission
EP3896312A1 (en) * 2020-04-15 2021-10-20 Deere & Company Hydraulic assembly for a vehicle transmission
US11543023B2 (en) 2020-04-15 2023-01-03 Deere & Company Hydraulic arrangement for a vehicle transmission
US11971097B2 (en) 2020-04-15 2024-04-30 Deere & Company Hydraulic arrangement for a vehicle transmission

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