KR101785938B1 - Hydraulic circuit for automatic transmission - Google Patents

Hydraulic circuit for automatic transmission Download PDF

Info

Publication number
KR101785938B1
KR101785938B1 KR1020150190119A KR20150190119A KR101785938B1 KR 101785938 B1 KR101785938 B1 KR 101785938B1 KR 1020150190119 A KR1020150190119 A KR 1020150190119A KR 20150190119 A KR20150190119 A KR 20150190119A KR 101785938 B1 KR101785938 B1 KR 101785938B1
Authority
KR
South Korea
Prior art keywords
pressure
valve
torque converter
regulator valve
line
Prior art date
Application number
KR1020150190119A
Other languages
Korean (ko)
Other versions
KR20170079486A (en
Inventor
송수영
Original Assignee
현대 파워텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대 파워텍 주식회사 filed Critical 현대 파워텍 주식회사
Priority to KR1020150190119A priority Critical patent/KR101785938B1/en
Publication of KR20170079486A publication Critical patent/KR20170079486A/en
Application granted granted Critical
Publication of KR101785938B1 publication Critical patent/KR101785938B1/en

Links

Images

Classifications

    • 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
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0262—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 characterised by the signals used the signals being hydraulic
    • F16H61/0265—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
    • F16H61/0267—Layout of hydraulic control circuits, e.g. arrangement of valves
    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/431—Pump capacity control by electro-hydraulic control means, e.g. using solenoid valves
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0202—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 characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F16H2061/026—On-off solenoid valve

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

An invention relating to a hydraulic circuit for an automatic transmission is disclosed. A hydraulic circuit for an automatic transmission according to the present invention includes: a pump unit; a regulator valve that receives a line pressure discharged from a pump unit to generate a pressure required by the system; a torque converter that receives a torque converter pressure through the regulator valve; A pressure reducing valve for generating the supply pressure of the on-off solenoid, and a pressure regulator valve branched from the pressure regulating valve for transmitting the torque converter pressure to the torque converter control valve, And a branch supply line for supplying the supply pressure.

Description

HYDRAULIC CIRCUIT FOR AUTOMATIC TRANSMISSION BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic circuit for an automatic transmission, and more particularly, to a hydraulic circuit for an automatic transmission capable of reducing a pressure strengthening loss of a regulator valve and a pressure reducing valve and increasing a flow rate toward a torque converter.

2. Description of the Related Art Generally, a power train is provided with a transmission for transmitting a rotational force generated by an engine to an output shaft at an appropriate rotational speed according to a running state. BACKGROUND ART An automatic transmission in which a transmission ratio is implemented by a plurality of planetary gear sets and a plurality of friction elements is controlled by a transmission in order to facilitate the driver's convenience.

A force is required to actuate the friction element to connect the crankshaft to either the ring gear, the sun gear, or the planetary carrier provided in the planetary gear set or fix it to the transmission case. The hydraulic line and the solenoid valve for supplying the force for operating the friction element are called hydraulic circuits.

In a hydraulic circuit to which an automatic transmission is applied, the basic pressure is controlled by using a regulator valve (Regulator Valve) and a torque converter control valve (TCV).

The regulator valve generates the line pressure required for the system, and the control valve for the torque converter is a valve for controlling the torque converter (T / Con) pressure. The pressure reducing valve is also referred to as a reducing valve and supplies pressure to the indirect control solenoid.

Conventionally, since the oil drained from the regulator valve is moved to a conduit connected to the pump portion, a pressure drop loss at the drain of the regulator valve largely occurs. In addition, since the line supplied to the pressure reducing valve is connected to the line supplying the line pressure, there is a problem that a pressure drop loss during drainage of the pressure reducing valve largely occurs. Therefore, there is a need for improvement.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Publication No. 2012-0051241 (published on May 22, 2012, entitled "CVT Hydraulic Circuit").

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic circuit for an automatic transmission capable of reducing the pressure strengthening loss of a regulator valve and a pressure reducing valve and increasing a flow rate toward a torque converter .

A hydraulic circuit for an automatic transmission according to the present invention includes: a pump unit; a regulator valve that receives a line pressure discharged from a pump unit to generate a pressure required by the system; a torque converter that receives a torque converter pressure through a regulator valve, A pressure reducing valve for generating the supply pressure of the on-off solenoid, and a pressure reducing valve branched from the pressure reducing valve for transmitting the torque converter pressure from the regulating valve to the torque converter control valve, And a branch supply line for supplying the supply pressure to the branch pipe.

The torque converter pressure supplied to the torque converter control valve and the pressure of the supply pressure supplied to the pressure reducing valve are equal to each other.

And a drain pipe connecting the regulator valve and the branch pipe to the branch pipe and supplying the oil drained from the regulator valve to the branch pipe.

It is further preferable that the apparatus further includes a check valve provided in the drain pipe to block the flow of the fluid flowing backward from the branch supply pipe line to the regulator valve through the drain pipe line and allowing the flow of the fluid from the regulator valve to the branch pipe line, Do.

Further, the check valve is used as the check valve.

In the hydraulic circuit for an automatic transmission according to the present invention, since the torque converter pressure having a pressure lower than the line pressure is supplied to the pressure reducing valve through the branch supply pipe, the pressure drop loss during the drain of the pressure reducing valve is reduced.

In addition, according to the present invention, since the drain pipe connected to the regulator valve is connected to the branch supply pipe, there is an effect that the loss of pressure drop during drainage in the regulator valve is reduced.

Further, according to the present invention, since the pressure strengthening loss of the regulator valve and the pressure reducing valve is reduced and the flow rate toward the torque converter is increased, the capacity of the pump can be reduced to reduce the installation cost.

1 is a view schematically showing a hydraulic circuit for an automatic transmission according to an embodiment of the present invention.
2 is a view schematically showing a connection state of a branch supply pipe line and a drain pipe line according to an embodiment of the present invention.
FIG. 3 is a view illustrating a flow of a fluid moving along a branch pipe line and a drain pipe line according to an embodiment of the present invention.
4 is a view schematically showing a state in which a check valve is installed in a drain pipe according to an embodiment of the present invention.

Hereinafter, a hydraulic circuit for an automatic transmission according to an embodiment of 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.

Further, 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.

FIG. 1 is a view schematically showing a hydraulic circuit for an automatic transmission according to an embodiment of the present invention. FIG. 2 is a view schematically showing a connection state of a branch supply pipe line and a drain pipe according to an embodiment of the present invention. FIG. 3 is a view showing a flow of fluid moving along a branch pipe line and a drain pipe line according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a drain pipe according to an embodiment of the present invention, And Fig.

1 to 3, a hydraulic circuit 1 for an automatic transmission according to an embodiment of the present invention includes a pump unit 10, A control valve 30 for a torque converter that receives the torque converter pressure through the regulator valve 20 and controls the operation of the torque converter 80, A pressure reducing valve 40 for generating a supply pressure and a pressure reducing valve 40 branched from a conduit for transmitting the torque converter pressure from the regulator valve 20 to the torque converter control valve 30 and connected to the pressure reducing valve 40, And a branch supply line path (50) for supplying the supply pressure to the branch pipe (40).

The pump unit 10 generates the oil pressure at the set pressure. The oil pressure generated in the pump section 10 is also referred to as a line pressure and can be used throughout the hydraulic circuit 1 system for an automatic transmission. The pump unit 10 according to one embodiment may be a normally driven mechanical pump or a non-axial pump.

The regulator valve 20 receives various types of valves within the technical concept of receiving the line pressure discharged from the pump unit 10 and generating a required pressure in the system. The regulator valve 20 according to one embodiment is a line pressure control spool valve for generating a torque converter pressure. The spool valve is slidably moved and operated for hydraulic control.

The torque converter control valve 30 is a valve that receives the torque converter pressure through the regulator valve 20 and controls the operation of the torque converter 80. The torque converter control valve 30 is also referred to as TCV.

The pressure reducing valve 40 is a valve for generating a supply pressure of the on-off solenoid, and is also referred to as a reducing valve. The pressure reducing valve (40) supplies pressure to the indirect control solenoid valve and drains the flow amount to reduce the pressure.

The branch supply line path 50 is a line branched from a conduit for transmitting the torque converter pressure from the regulator valve 20 to the torque converter control valve 30. [ The branch supply line path 50 is connected at one side to the first connection line 92 connecting the torque converter control valve 30 at the regulator valve 20 and at the other side to the pressure reducing valve 40. Accordingly, the supply pressure is transmitted to the pressure reducing valve 40 along the first connection conduit 92.

That is, since the conduit connected to the torque converter control valve 30 is branched from the regulator valve 20 and connected to the pressure reducing valve 40, the supply pressure of the pressure reducing valve 40 becomes the torque converter pressure. Therefore, the pressure drop loss of the pressure reducing valve 40 is reduced, and the hydraulic pressure characteristics through the stabilization of the pressure reduction are improved. In addition, since the energy loss of the hydraulic circuit 1 for the automatic transmission is reduced and the flow rate toward the torque converter 80 is increased, the capacity of the pump section 10 can be reduced.

On the other hand, the torque converter pressure supplied to the torque converter control valve 30 and the supply pressure supplied to the pressure reducing valve 40 are equal to each other.

The drain pipe 60 connects the regulator valve 20 and the branch supply pipe path 50 and supplies the oil drained from the regulator valve 20 to the branch supply pipe path 50. That is, the drain piping 60, which is the flow path drained from the regulator valve 20, is connected to the branch piping 50 for supplying pressure to the pressure reducing valve 40, so that the pressure drop in the drain piping 20 .

As shown in FIG. 4, a backflow prevention valve 70 may be additionally provided in the drain pipe 60. The check valve 70 is installed in the drain pipe 60 and blocks the flow of the fluid flowing backward from the branch supply pipe path 50 to the regulator valve 20 through the drain pipe 60. The regulator valve 20, To the branch supply line path (50). Since the check valve 70 according to the embodiment uses a check valve, the fluid flowing through the branch supply pipe path 50 is prevented from flowing back to the regulator valve 20. [

1 to 3, the torque converter 80 is connected to the control valve 30 for the torque converter and receives the torque converter pressure through the control valve 30 for the torque converter. The torque converter 80 is a transmission device of a hydraulic type, and is a device for transmitting power by converting a torque using a fluid. When the drain is generated in the torque converter 80, the fluid is moved to the lubricating portion 84.

The piping section 90 for connecting the components in the hydraulic circuit 1 for an automatic transmission includes a main pipeline 91, a first connection pipeline 92, a second connection pipeline 93 and a third pipeline 94, A first drain conduit 95, a second drain conduit 96, a third drain conduit 97, and a connection conduit 98.

The main pipe 91 is connected to the pump unit 10 at one side by a line for transmitting the line pressure generated by the pump unit 10. The first connection line 92 is a line connecting the main line 91 and the regulator valve 20 and supplies line pressure to the regulator valve 20. The second connection conduit 93 is a conduit connecting the regulator valve 20 and the control valve 30 for the torque converter and supplies the torque converter pressure to the torque converter control valve 30. The third connection conduit 94 is a conduit connecting the torque converter control valve 30 and the torque converter 80 and supplies the torque converter pressure to the torque converter 80. The first drain pipe 95 connects the control valve 30 for the torque converter and the pump unit 10 and guides the fluid drained from the torque converter control valve 30 to the pump unit 10. The second drain line 96 connects the torque converter 80 and the lubricating portion 84 and guides the fluid drained from the torque converter 80 to the lubricating portion 84. The third drain pipe 97 is connected to the pressure reducing valve 40 and guides the fluid drained from the pressure reducing valve 40 to the outside of the pressure reducing valve 40. The connecting conduit 98 is a conduit connecting the pressure reducing valve 40 and the solenoid valve controlled by the pressure reducing valve 40.

Hereinafter, the operating state of the hydraulic circuit 1 for an automatic transmission according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 3, the line pressure generated in the pump is transmitted to the regulator valve 20 through the main pipeline 91 and the first connecting pipeline 92. The torque converter pressure generated by the operation of the regulator valve 20 is transferred to the torque converter control valve 30 through the second connection conduit 93. The torque converter pressure is supplied to the pressure reducing valve (40) through the branch supply pipe path (50) branched from the second connecting pipe (93). The operation of the torque converter control valve 30 causes the torque converter pressure to be supplied to the torque converter 80 to operate the torque converter 80. [

Since the drains discharged from the regulator valve 20 are all supplied to the branch supply line path 50, the pressure drop loss at the drainage at the regulator valve 20 can be eliminated or reduced. Since there is no drain flow discharged to the outside of the system at the regulator valve 20, the flow rate to the torque converter 80 relatively increases, and the amount of lubricant increases relatively at low RPM. The flow rate toward the torque converter 80 is increased by the provision of the branch supply line 50 and the drain line 60 and the lubricating performance can be improved by increasing the amount of the lubricating oil under the conditions such as the low RPM region.

Also, the tilting phenomenon generated in the regulator valve 20 can be reduced. A spool valve that continuously performs perturbation for control such as the regulator valve 20 tilts due to a difference in pressure load. However, since the flow path drained from the regulator valve 20 is connected to the branch supply path 50 where the torque converter pressure is applied, not the flow path connected to the pump portion 10, the pressure drop due to the drain loss is small or there is no tilting phenomenon .

That is, since the pressure difference between the first and second connection conduits 92 and 93 and the pressure difference between the second connection conduit 93 and the drain conduit 60 are reduced, the tilting of the regulator valve 20 The reduction of the phenomenon is advantageous, and the reduction of the uneven wear of the spool valve and the stability of the control pressure are improved.

Also, the pressure supplied to the pressure reducing valve 40 is a torque converter pressure having a pressure lower than the line pressure. Accordingly, the pressure drop loss of the pressure reducing valve (40) during the drain operation in the pressure reducing valve (40) is reduced, and the hydraulic pressure characteristics are improved through the stabilization of the pressure reduction. Therefore, the hydraulic circuit 1 for an automatic transmission can prevent the effective discharge amount of the pump section 10 from being forcibly discarded by receiving the drive torque from the engine.

As described above, according to the present invention, since the torque converter pressure having a pressure lower than the line pressure is supplied to the pressure reducing valve 40 through the branch supply pipe path 50, the pressure drop loss during the drain of the pressure reducing valve 40 is reduced It is effective. In addition, since the drain pipe 60 connected to the regulator valve 20 is connected to the branch supply pipe path 50, there is an effect that the pressure drop loss at the drain of the regulator valve 20 is reduced. Also, since the pressure strengthening loss between the regulator valve 20 and the pressure reducing valve 40 is reduced to increase the flow rate toward the torque converter 80, the capacity of the pump can be reduced to reduce the installation cost.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. will be. Accordingly, the true scope of the present invention should be determined by the following claims.

1: Hydraulic circuit for automatic transmission
10: pump section 20: regulator valve
30: Control valve for torque converter
40: Reducing valve 50: Branch supply line
60: drain pipe 70: backflow prevention valve
80: torque converter 84: lubricating part
90: channel portion 91: main channel
92: first connection pipe 93: second connection pipe
94: third connection pipe 95: first drain pipe
96: second drain line 97: third drain line
98:

Claims (5)

A pump section;
A regulator valve that receives the line pressure discharged from the pump unit and generates pressure necessary for the system;
A control valve for a torque converter that receives the torque converter pressure through the regulator valve and controls operation of the torque converter;
A pressure reducing valve for generating a supply pressure of the on-off solenoid;
A branch supply pipe branched from the regulator valve at a conduit for transferring the torque converter pressure to the torque converter control valve and connected to the pressure reducing valve and providing a supply pressure to the pressure reducing valve; And
And a drain pipe connected to the regulator valve and the branch pipe to supply the oil drained from the regulator valve to the branch pipe.
The method according to claim 1,
Wherein the torque converter pressure supplied to the torque converter control valve and the pressure of the supply pressure supplied to the pressure reducing valve are equal to each other.
delete The method according to claim 1,
A backflow prevention valve installed in the drain pipe for blocking a flow of fluid flowing back from the branch supply pipe passage to the regulator valve through the drain pipe passage and allowing the flow of the fluid from the regulator valve toward the branch supply pipe passage; Further comprising: a hydraulic circuit for an automatic transmission.
5. The method of claim 4,
And the check valve is used as the check valve.
KR1020150190119A 2015-12-30 2015-12-30 Hydraulic circuit for automatic transmission KR101785938B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150190119A KR101785938B1 (en) 2015-12-30 2015-12-30 Hydraulic circuit for automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150190119A KR101785938B1 (en) 2015-12-30 2015-12-30 Hydraulic circuit for automatic transmission

Publications (2)

Publication Number Publication Date
KR20170079486A KR20170079486A (en) 2017-07-10
KR101785938B1 true KR101785938B1 (en) 2017-10-17

Family

ID=59355462

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150190119A KR101785938B1 (en) 2015-12-30 2015-12-30 Hydraulic circuit for automatic transmission

Country Status (1)

Country Link
KR (1) KR101785938B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100764705B1 (en) * 2006-06-23 2007-10-08 현대자동차주식회사 Apparatus for controlling oil pressure of automatic transmission

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100764705B1 (en) * 2006-06-23 2007-10-08 현대자동차주식회사 Apparatus for controlling oil pressure of automatic transmission

Also Published As

Publication number Publication date
KR20170079486A (en) 2017-07-10

Similar Documents

Publication Publication Date Title
JP5025732B2 (en) Hydraulic supply device for industrial vehicles
KR20130060044A (en) Hydraulic control system for transmission
JP5434945B2 (en) Hydraulic control device
JP5705146B2 (en) Transmission hydraulic system
KR20160110497A (en) Transmission device with a hydraulic system
US7611002B2 (en) Apparatus for the operation of a hydrodynamic torque converter and a therewith corresponding converter bypassing clutch of a transmission apparatus
CN112524242B (en) Hydraulic control apparatus for automatic transmission
JP4527106B2 (en) Hydraulic system for transmission with starting clutch
KR101785938B1 (en) Hydraulic circuit for automatic transmission
JP5553614B2 (en) Hydraulic system
KR101393952B1 (en) Hydraulic pressure circuit of automatic transmission
KR102093113B1 (en) Hydraulic apparatus for hybrid transmission
KR100579242B1 (en) Hydraulic control system of continuously variable transmission for vehicle
KR20190063857A (en) Hydraulic control system of automatic transmission for vehicles
JP5935704B2 (en) Hydraulic control device
KR100211362B1 (en) Line pressure lower compensation device
KR101806095B1 (en) Device for controlling hydraulic of auto transmission
JP5172569B2 (en) Hydraulic pump device for continuously variable transmission
KR20200061661A (en) Binary hydraulic apparatus for transmission
KR100282868B1 (en) Pressure control valve of automatic transmission hydraulic controller
KR100372449B1 (en) decive for supplying oil to torque converter of auto transmission
KR20170062928A (en) Apparatus for supplying oil
KR100293662B1 (en) Hydraulic control system of continuously variable transmission for vehicle
KR100305827B1 (en) Hydraulic control system for continuously variable transmission
KR20190040670A (en) Oil pressure control system for controlling auto transmission

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant