KR20150003616A - Oil pressure supply system of automatic transmission - Google Patents

Oil pressure supply system of automatic transmission Download PDF

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Publication number
KR20150003616A
KR20150003616A KR20130076709A KR20130076709A KR20150003616A KR 20150003616 A KR20150003616 A KR 20150003616A KR 20130076709 A KR20130076709 A KR 20130076709A KR 20130076709 A KR20130076709 A KR 20130076709A KR 20150003616 A KR20150003616 A KR 20150003616A
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KR
South Korea
Prior art keywords
port
discharge
hydraulic pressure
pump
supply system
Prior art date
Application number
KR20130076709A
Other languages
Korean (ko)
Inventor
위태환
Original Assignee
현대자동차주식회사
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 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR20130076709A priority Critical patent/KR20150003616A/en
Publication of KR20150003616A publication Critical patent/KR20150003616A/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
    • F16H2061/0046—Details of fluid supply channels, e.g. within shafts, for supplying friction devices or transmission actuators with control fluid
    • 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

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

Abstract

In the present invention, disclosed is an oil pressure supply system of an automatic transmission which can alleviate the imbalance of oil pressure inside a pump chamber, reduce the loss in pump operation, and promote improvement of durability of components in accordance with the reduction of eccentric force. According to an embodiment of the present invention, the oil pressure supply system of an automatic transmission is applied with a vane pump having first and second pump chambers. Comprised are first and second suction pipelines connecting first and second suction ports of the first and second pump chambers to an oil pan; first and second discharge pipelines connecting first and second discharge ports of the first and second pump chambers to a transmission unit; a first switch valve controlled by a solenoid valve as arranged on the first discharge pipeline; and a second switch valve controlled by the solenoid valve as arranged on the second suction pipeline; and a bypass pipeline selectively circulating oil pressure of the first discharge pipeline to the second pump chamber by connecting the first switch valve and the second switch valve.

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 automatic transmission for a vehicle, and more particularly, to a hydraulic pressure supply system for a vehicular automatic transmission that reduces a pump driving loss by reducing the eccentricity of a pump chamber in a half discharge mode of a vane pump, To a hydraulic pressure supply system.

The oil pump applied to the hydraulic supply 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 may be 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-rotation region, unnecessarily large amount of flow is supplied in the high-rotation region, which causes a driving loss of the pump.

Accordingly, the vane pump can form the first and second pump chambers at axially symmetric positions of the rotor so as to reflux the surplus flow rate in the high speed 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 to or returned to the transmission portion as needed.

More specifically, in the low rotation region, the high-pressure fluid generated in the first pump chamber and the second pump chamber is sufficiently supplied to the transmission portion, and in the high rotation region, the hydraulic pressure generated in the second pump chamber is returned to the surplus flow rate, Can be reduced.

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 pipes 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 conduits 4d and 6d, respectively.

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

The switch valve 12 selectively serves to shut off the second discharge line 6d and the upstream side of the second discharge line 6d when the second discharge line 6d is shut off is connected to the return line 14 To be connected.

The hydraulic pressure generated in the first and second pump chambers 4 and 6 is supplied to the transmission portion 10 through the first and second discharge conduits 4d and 6d as shown in FIG. do.

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 shut off the second discharge line 6d.

The hydraulic pressure generated in the second pump chamber 6 is then returned through the switch valve 12 and return pipe 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 excessive 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 when the oil temperature rises and the RPM of the semi-discharge entering RPM must be further increased.

In addition, in the first pump chamber 4 and the second pump chamber 6, an eccentricity of hydraulic pressure is generated and a driving loss is generated. Such an eccentric force has a disadvantage that the durability of the rotating component is lowered.

An embodiment of the present invention is to provide a hydraulic pressure supply system for a vehicular automatic transmission in which a hydraulic imbalance in a pump chamber is reduced, a pump drive loss is reduced, and durability of a component is reduced as the eccentricity is reduced in a semi-discharge mode do.

In one or more embodiments of the present invention, in a hydraulic pressure supply system for an automatic transmission for a vehicle to which a vane pump having first and second pump chambers is applied, the first and second suction ports of the first and second pump chambers First and second suction pipes connecting the oil pan; First and second discharge pipes connecting the first and second discharge ports of the first and second pump chambers to the transmission portion; A first switch valve disposed on the first discharge line and controlled by a solenoid valve; A second switch valve disposed on the second suction pipe line and controlled by a solenoid valve; And a bypass line connecting the first switch valve and the second switch valve to selectively circulate the hydraulic pressure in the first discharge line to the second pump chamber.

The first switch valve may include first and second ports connected to the first discharge port, A third port that is selectively connected to the first port and guides the oil pressure of the first discharge port to the shift portion; And a fourth port that is selectively connected to the second port and guides the hydraulic pressure of the first discharge port to the bypass line.

The second switch valve may include a first port connected to the oil pan; A second port connected to the bypass line; A third port selectively connected to the first port to guide the fluid of the first port to the second suction port; And a fourth port that is selectively connected to the second port and guides the hydraulic pressure to the bypass pipe to the second suction port.

Also, the solenoid valve may be an on / off solenoid valve.

In addition, the first and second switch valves may be operated simultaneously by one solenoid valve.

In the embodiment of the present invention, all of the hydraulic pressures generated in the first and second pump chambers in the low rotational speed range (full discharge mode) are supplied to the speed change portion. In the high speed rotation range (half discharge mode) 2 pump room and supplied to the transmission.

Accordingly, the hydraulic imbalance between the first pump chamber and the second pump chamber is relieved in the high rotation region (half discharge mode), the pump drive loss can be reduced, and the durability of the pump can be improved by reducing the eccentricity.

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 an embodiment of the present invention, which is a fluid flow chart in a full discharge mode.
4 is a block diagram of a hydraulic supply system according to an 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.

However, parts that are not related to the description will be omitted for clarifying the present embodiment.

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 an embodiment of the present invention, which is a fluid flow chart in a full discharge mode.

Referring to FIG. 3, the hydraulic pressure supply system according to the embodiment of the present invention is an example in which a vane pump 20 is applied as an oil pump.

The vane pump 20 has a first pump chamber 24 and a second pump chamber 26 at axially symmetric positions of the rotor 22.

The first pump chamber 24 and the second pump chamber 26 hold the first and second suction ports 24a and 26a and the first and second discharge ports 24b and 26b, respectively.

The first and second suction ports 24a and 26a are connected to the oil pan 28 through first and second suction pipe passages 24c and 26c respectively and the first and second discharge ports 26b ) 26b are connected to the transmission portion 30 through the first and second discharge conduits 24d and 26d, respectively.

First and second switch valves 32 and 34 controlled by one ON / OFF solenoid valve SOL are disposed on the first discharge pipe line 24d and the second suction pipe line 26c, respectively .

The first switch valve 32 includes first and second ports 321 and 322 communicating with the first discharge port 24b and first and second ports 321 and 322 selectively connected to the first port 321, A third port 323 for guiding the hydraulic pressure of the first discharge port 24b to the transmission portion 30 and a hydraulic pressure of the second discharge port 24b being selectively connected to the second port 322, And a fourth port (324) for guiding the second switch valve (34) through the second switch valve (34).

The second switch valve 34 includes a first port 341 connected to the oil pan 28, a second port 342 connected to the bypass line 36, a second port 342 connected to the first port 341 A third port 343 selectively connected to the second port 342 to guide the oil of the oil pan 28 to the second suction port 26a and a second port 342 selectively connected to the bypass port 362, To be guided to the second suction port 26a.

In the hydraulic pressure supply system according to the embodiment of the present invention configured as described above, the first switch valve 32 is closed while the on / off solenoid valve SOL is turned off, as shown in FIG. 3, And the second switch valve 34 are interconnected with the first port 321 and the third port 323, respectively.

Accordingly, the hydraulic pressures generated in the first and second pump chambers 24 and 26 are all the same. And is supplied to the transmission portion 30 through the second discharge pipeline 24d (26d) to be involved in the automatic transmission.

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

4, the first switch valve 32 and the second switch valve 34 are connected to the respective second ports 322 by the ON control of the on / off solenoid valve SOL in the high speed rotation region (half discharge mode) The second port 342 and each fourth port 324 and 344 are interconnected.

Then, the oil in the oil pan 28 is not supplied to the second pump chamber 26 while the second suction pipe passage 26C is shut off.

However, the oil introduced into the first pump chamber 24 through the first suction pipe passage 24c is generated as a high-pressure oil pressure and flows into the first discharge pipe 24d, the first switch valve 32, the bypass pipe 36, The hydraulic pressure supplied to the second pump chamber 26 is again pumped and supplied to the transmission portion 30 through the second discharge pipe 26d via the second switch valve 34, So that the automatic transmission is involved.

As described above, in the hydraulic pressure supply system according to the embodiment of the present invention, the hydraulic pressure generated in the first and second pump chambers 24 and 26 is supplied to the transmission portion 30 in the low rotation region (full discharge mode) And the hydraulic pressure generated in the first pump chamber 24 is pumped back into the second pump chamber 26 to be supplied to the transmission portion 30 in the high rotation region (half discharge mode).

Accordingly, the hydraulic imbalance between the first pump chamber 24 and the second pump chamber 26 is relieved in the high rotation region (semi-discharge mode), so that the drive loss of the pump can be reduced, and the durability of the pump can be improved have.

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 ... Vane pump
22 ... rotor
24, 26 ... first and second pump rooms
24a, 26a ... First and second suction ports
24b, 26b ... First and second discharge ports
24c, 26c ... first and second suction pipes
24d, 26d ... are connected to the first and second discharge pipes
28 ... oil pan
30 ... transmission portion
32, 34 ... First and second switch valves
36 ... Bypass conduit
SOL ... On / off solenoid valve

Claims (5)

In a hydraulic pressure supply system for an automatic transmission for a vehicle to which a vane pump having first and second pump chambers is applied,
First and second suction pipes connecting the first and second suction ports of the first and second pump chambers to the oil pan;
First and second discharge pipes connecting the first and second discharge ports of the first and second pump chambers to the transmission portion;
A first switch valve disposed on the first discharge line and controlled by a solenoid valve;
A second switch valve disposed on the second suction pipe line and controlled by a solenoid valve;
A bypass conduit connecting the first switch valve and the second switch valve to circulate the hydraulic pressure of the first discharge conduit selectively to the second pump chamber;
And the hydraulic pressure supply system of the automatic transmission for a vehicle. The method according to claim 1,
The first switch valve
First and second ports connected to the first discharge port;
A third port that is selectively connected to the first port and guides the oil pressure of the first discharge port to the shift portion;
A fourth port selectively connected to the second port to guide the hydraulic pressure of the first discharge port to the bypass line;
And the hydraulic pressure supply system of the automatic transmission for a vehicle. The method according to claim 1,
The second switch valve
A first port connected to the oil pan;
A second port connected to the bypass line;
A third port selectively connected to the first port to guide the fluid of the first port to the second suction port;
A fourth port that is selectively connected to the second port and guides the hydraulic pressure to the bypass pipe to the second suction port;
And the hydraulic pressure supply system of the automatic transmission for a vehicle. The method according to claim 1,
The solenoid valve
Wherein the solenoid valve is an on / off solenoid valve. The method according to claim 1,
The first and second switch valves
Wherein the hydraulic pressure supply system is operated simultaneously by one solenoid valve.
KR20130076709A 2013-07-01 2013-07-01 Oil pressure supply system of automatic transmission KR20150003616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130076709A KR20150003616A (en) 2013-07-01 2013-07-01 Oil pressure supply system of automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130076709A KR20150003616A (en) 2013-07-01 2013-07-01 Oil pressure supply system of automatic transmission

Publications (1)

Publication Number Publication Date
KR20150003616A true KR20150003616A (en) 2015-01-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR20130076709A KR20150003616A (en) 2013-07-01 2013-07-01 Oil pressure supply system of automatic transmission

Country Status (1)

Country Link
KR (1) KR20150003616A (en)

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