KR20140075127A - Oil pressure supply system of automatic transmission - Google Patents

Oil pressure supply system of automatic transmission Download PDF

Info

Publication number
KR20140075127A
KR20140075127A KR1020120143100A KR20120143100A KR20140075127A KR 20140075127 A KR20140075127 A KR 20140075127A KR 1020120143100 A KR1020120143100 A KR 1020120143100A KR 20120143100 A KR20120143100 A KR 20120143100A KR 20140075127 A KR20140075127 A KR 20140075127A
Authority
KR
South Korea
Prior art keywords
pressure
low
passage
oil
port
Prior art date
Application number
KR1020120143100A
Other languages
Korean (ko)
Inventor
김태호
김영철
김종현
강승재
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 KR1020120143100A priority Critical patent/KR20140075127A/en
Publication of KR20140075127A publication Critical patent/KR20140075127A/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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4008—Control of circuit pressure
    • F16H61/4017—Control of high pressure, e.g. avoiding excess pressure by a relief valve
    • 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4192—Detecting malfunction or potential malfunction, e.g. fail safe

Landscapes

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

Abstract

A hydraulic supply system for an automatic transmission for a vehicle is disclosed. A hydraulic pressure supply system of an automatic transmission for a vehicle according to an embodiment of the present invention includes a low-pressure oil pump for generating a low-pressure hydraulic pressure while being driven by a low-pressure electric motor to supply the low-pressure hydraulic pressure to a first low- A low-pressure oil pump which is driven by the high-pressure electric motor to generate a high-pressure oil pressure and supplies the generated high-pressure oil to the first low-pressure oil passage; Pressure regulator valve for controlling the hydraulic pressure supplied to the first low-pressure passage and supplying the oil to the low-pressure portion through the second low-pressure passage; A high-pressure regulator valve for controlling an oil pressure supplied to the first high-pressure passage and supplying the oil to the high-pressure portion through a second high-pressure passage; And a fail-safe valve disposed between the second low-pressure passage and the second high-pressure passage so that the hydraulic pressure of the second low-pressure passage is supplied to the high-pressure portion when no hydraulic pressure is supplied to the second high-pressure passage.

Figure P1020120143100

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 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 two-pump-two- The present invention relates to a hydraulic pressure supply system for an automatic transmission for a vehicle.

As global oil prices and exhaust emission regulations are strengthened recently, automakers are concentrating on developing technologies that can improve fuel efficiency in an environmentally friendly way.

Improvement in fuel economy in the automatic transmission can be realized by minimizing unnecessary power consumption of the oil pump.

As described above, in order to improve the fuel economy, the oil pump applied to the automatic transmission is divided into a low-pressure oil pump and a high-pressure oil pump, and the hydraulic pressure generated by the low-pressure oil pump is divided into low pressure parts (torque converter, And the hydraulic pressure generated by the high-pressure oil pump is supplied to a high-pressure portion (a friction member selectively operated at the time of shifting).

That is, the automatic transmission having two oil pumps as described above is configured to generate the entire hydraulic pressure based on the low-pressure portion, and at the same time to control and supply only a part of the hydraulic pressure to a required high pressure in the high-

1 is a configuration diagram of a hydraulic pressure supply system of a conventional automatic transmission for a vehicle.

1, in the conventional hydraulic pressure supply system, the low-pressure hydraulic pressure generated by the low-pressure oil pump 2 is supplied to the low-pressure portion 4 such as the torque converter T / C, the cooling portion, the lubricating portion, Pressure oil pressure generated by the oil pump 6 for the shift can be supplied to the high-pressure portion 8 for operating the friction member related to the shift.

The hydraulic pressure generated by the low pressure oil pump 2 is controlled to be a stable hydraulic pressure in the low pressure regulator valve 10 and supplied to the low pressure portion 4. The low pressure regulator valve 10 is a solenoid As shown in FIG.

The hydraulic pressure generated by the high-pressure oil pump 6 is controlled to a stable oil pressure by the high-pressure regulator valve 12 and is supplied to the high-pressure portion 4. The high-pressure regulator valve 12 is connected to a solenoid Controlled by the control pressure.

The low pressure oil pump 2 is driven by a low pressure electric pump M1 and the high pressure oil pump 6 is driven by a high pressure electric pump M2.

However, since the fail-safe function of the high-pressure portion 8 is not possible in the above-described hydraulic pressure supply system, the supply of hydraulic pressure to the friction member becomes insufficient when the high-pressure portion 8 fails, It implies.

The embodiment of the present invention improves the merchantability by allowing the hydraulic pressure of the low pressure portion of the high pressure portion to be simultaneously supplied to the high pressure portion in the hydraulic pressure supply system of the Two Pump- And a hydraulic pressure supply system for an automatic transmission for a vehicle.

In one or more embodiments of the present invention, a low-pressure oil pump for generating a low-pressure hydraulic pressure while being driven by a low-voltage electric motor to supply the low-pressure hydraulic pressure to a first low-pressure passage; A low-pressure oil pump which is driven by the high-pressure electric motor to generate a high-pressure oil pressure and supplies the generated high-pressure oil to the first low-pressure oil passage; Pressure regulator valve for controlling the hydraulic pressure supplied to the first low-pressure passage and supplying the oil to the low-pressure portion through the second low-pressure passage; A high-pressure regulator valve for controlling an oil pressure supplied to the first high-pressure passage and supplying the oil to the high-pressure portion through a second high-pressure passage; And a fail-safe valve disposed between the second low-pressure passage and the second high-pressure passage so that the hydraulic pressure of the second low-pressure passage is supplied to the high-pressure portion when no hydraulic pressure is supplied to the second high- A hydraulic pressure supply system can be provided.

In addition, the fail-safe valve is controlled by the elastic force of the elastic member acting on one side and the oil pressure of the second high-pressure oil path acting on the other side, while the oil pressure of the second low-pressure oil path or the oil pressure of the second high- The flow path can be formed.

The fail safe valve may include a first port for receiving the hydraulic pressure from the second high pressure passage, a second port for receiving the hydraulic pressure from the second low pressure passage, and a second port for receiving the hydraulic pressure of the second high- A valve body including a third port and a fourth port for selectively supplying a hydraulic pressure supplied to the first port or the second port to the high-pressure portion; A first land which acts on the control pressure supplied to the third port, a second land which selectively communicates the first port with the fourth port, and a second land which communicates with the second land together with the second land, And a third land for communicating the port with the fourth port, and an elastic member elastically supported between the third land and the valve body.

In the embodiment of the present invention, when a high-pressure hydraulic pressure is not supplied due to a failure of the high-pressure oil pump or the like, the fail-safe valve operates so that the second low-pressure passage and the high- Is supplied to the high-pressure portion.

Accordingly, although the normal high-pressure oil pressure is not supplied to the high-pressure portion, at least the hydraulic pressure for operating the friction element of the high-pressure portion can be supplied to prevent the occurrence of a large problem such as a running stop of the vehicle.

1 is a configuration diagram of a hydraulic pressure supply system of a general automatic transmission.
2 is a block diagram of a normal drive of an automatic transmission hydraulic pressure supply system according to an embodiment of the present invention.
3 is a configuration diagram of a high-pressure portion of the automatic transmission hydraulic pressure supply system according to the embodiment of the present invention.

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

However, in order to clearly illustrate the embodiments of the present invention, portions not related to the description are omitted.

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.

2 is a configuration diagram of a hydraulic pressure supply system of an automatic transmission according to an embodiment of the present invention.

2, in the hydraulic pressure supply system according to the embodiment of the present invention, the low-pressure hydraulic pressure generated by the low-pressure oil pump 102 is supplied to the low-pressure section 104 such as the torque converter, the cooling section, Pressure oil pressure generated by the high-pressure oil pump 106 is supplied to the high-pressure portion 108 for operating the friction member related to the speed change.

The low-pressure oil pressure means a hydraulic pressure supplied and controlled by the torque converter to a low level that smoothes the operation and cooling and lubrication of the torque converter. The high-pressure oil pressure smoothly operates a plurality of friction members, The hydraulic pressure is controlled to be as high as possible.

The low pressure oil pump 102 is driven by the low pressure electric pump M1 and the high pressure oil pump 106 is driven by the high pressure electric pump M2.

The low-pressure electric pump M1 and the high-pressure electric pump M2 are independently controlled by a transmission control unit (not shown) to independently drive the low-pressure oil pump 102 and the high-pressure oil pump 106 So that the hydraulic pressure is generated.

The low pressure oil pump 102 sucks the oil stored in the oil pan P through the first suction passage 112 and discharges the low pressure oil pressure to the first low pressure passage 114, 114 is controlled to a stable oil pressure by the low-pressure regulator valve 110, and is supplied to the low-pressure portion 104 through the second low-pressure flow path 116.

The high pressure oil pump 106 sucks the oil stored in the oil pan P through the second suction passage 118 to discharge the high pressure oil into the first high pressure passage 120, 120 is controlled to a stable oil pressure by the high-pressure regulator valve 122, and the second high-pressure oil passage 124 is supplied to the high-pressure portion 108. [

In this automatic transmission fluid pressure supply system, the fail safe valve 130 is disposed between the second low pressure oil passage 116 and the second high pressure oil passage 124.

When the high-pressure oil pump 106 is normally operated, the fail-safe valve 130 supplies the oil pressure of the second high-pressure oil passage 124 to the high-pressure portion 108, So that a part of the hydraulic pressure of the second low-pressure flow path 116 can be supplied to the high-pressure portion 108 when the high-pressure hydraulic pressure is not generated.

The fail safe valve 130 is controlled by the elastic force of the elastic member E acting on both sides and the hydraulic pressure of the second high pressure passage 124 while the hydraulic pressure of the second low pressure passage 116 or the hydraulic pressure of the second And the hydraulic pressure of the high-pressure passage 124 can be supplied to the high-pressure portion 108.

For example, the fail-safe valve 130 is formed as a spool valve including a valve body and a valve spool that is slidably disposed left and right in the valve body.

The valve body includes a first port 200 receiving hydraulic pressure from the second high pressure passage 124, a second port 202 receiving a hydraulic pressure from the second low pressure passage 116, A third port 204 that receives the hydraulic pressure of the high pressure passage 122 as a control pressure and a third port 204 that selectively supplies the hydraulic pressure supplied to the first port 200 or the second port 202 to the high pressure portion 108 4 port 206, as shown in FIG.

The valve spool includes a first land 210 acting on a control pressure supplied to the third port 204 and a second port 210 selectively connecting the first port 200 with the fourth port 210. [ And a third land 214 for communicating the second port 202 with the fourth port 206 together with the second land 212. The second land 212 communicates with the fourth port 206, , And an elastic member (E) elastically supported between the third land (214) and the valve body.

Accordingly, the valve spool moves left and right by the control pressure supplied to the third port 204 and the elastic force of the elastic member E, and the fourth port 206 is moved to the first port 200, (202).

That is, when the high-pressure oil pump 106 operates normally, the valve spool of the fail-safe valve 130 is moved to the left in the drawing by the hydraulic pressure supplied from the high-pressure regulator valve 122 as shown in FIG. 2 By communicating the first port 200 and the fourth port 206, the second high-pressure flow path 124 is opened and a high-pressure hydraulic pressure is supplied to the high-pressure portion 108.

3 is a configuration diagram of a high-pressure portion of the automatic transmission hydraulic pressure supply system according to the embodiment of the present invention.

3, when a high-pressure hydraulic pressure is not supplied due to a failure of the high-pressure oil pump 106, the ball pool of the fail-safe valve 130 is urged toward the right side in the drawing by the elastic force of the elastic member E. So that the second port 202 and the fourth port 206 are communicated with each other.

The second low pressure passage 114 and the high pressure portion 108 communicate with each other through the fail safe valve 130 so that a low pressure controlled by the low pressure regulator valve 110 is supplied to the high pressure portion 108, It is possible to prevent the occurrence of a large problem such as a running stop of the vehicle.

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.

102 ... low pressure oil pump
104 ... low pressure portion
106 ... high pressure oil pump
108 ... high-
110 ... low pressure regulator valve
112, 118 ... First and second inhalation flow paths
114, 116 ... First and second low-
120, 124 ... First and second high-
122 ... High-pressure regulator valve
130 ... Fail-safe valve
M1 ... electric motor for low pressure
M2 ... High voltage electric motor

Claims (3)

Pressure oil pump for generating a low-pressure hydraulic pressure while being driven by the low-pressure electric motor and supplying the generated low-pressure hydraulic pressure to the first low-pressure oil passage;
A low-pressure oil pump which is driven by the high-pressure electric motor to generate a high-pressure oil pressure and supplies the generated high-pressure oil to the first low-pressure oil passage;
Pressure regulator valve for controlling the hydraulic pressure supplied to the first low-pressure passage and supplying the oil to the low-pressure portion through the second low-pressure passage;
A high-pressure regulator valve for controlling an oil pressure supplied to the first high-pressure passage and supplying the oil to the high-pressure portion through a second high-pressure passage;
A fail safe valve disposed between the second low pressure passage and the second high pressure passage so that the hydraulic pressure of the second low pressure passage is supplied to the high pressure portion when no hydraulic pressure is supplied to the second high pressure passage;
And the hydraulic pressure supply system of the vehicular automatic transmission. The method according to claim 1,
The fail-safe valve
Pressure oil passage is controlled by the elastic force of the elastic member acting on one side and the oil pressure of the second high-pressure oil passage acting on the other side so that the oil pressure of the second low-pressure oil passage or the oil pressure of the second high- Hydraulic supply system of an automatic transmission for a vehicle. The method according to claim 1,
The fail-safe valve
A second port receiving a hydraulic pressure from the second low pressure passage; a third port receiving a hydraulic pressure of the second high pressure passage as a control pressure; A valve body including a fourth port for selectively supplying a hydraulic pressure supplied to the first port or the second port to the high-pressure portion;
A first land which acts on the control pressure supplied to the third port, a second land which selectively communicates the first port with the fourth port, and a second land which communicates with the second land together with the second land, And an elastic member having a third land for communicating the port with the fourth port and elastically supported between the third land and the valve body.
KR1020120143100A 2012-12-10 2012-12-10 Oil pressure supply system of automatic transmission KR20140075127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120143100A KR20140075127A (en) 2012-12-10 2012-12-10 Oil pressure supply system of automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120143100A KR20140075127A (en) 2012-12-10 2012-12-10 Oil pressure supply system of automatic transmission

Publications (1)

Publication Number Publication Date
KR20140075127A true KR20140075127A (en) 2014-06-19

Family

ID=51127911

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120143100A KR20140075127A (en) 2012-12-10 2012-12-10 Oil pressure supply system of automatic transmission

Country Status (1)

Country Link
KR (1) KR20140075127A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170112784A (en) * 2016-04-01 2017-10-12 엘에스엠트론 주식회사 Hydraulic system for transmission of working vehicle
CN107642604A (en) * 2016-07-20 2018-01-30 现代自动车株式会社 Fluid pressure supply system for the dual-clutch transmission of vehicle
CN108413029A (en) * 2018-05-11 2018-08-17 湖北汽车工业学院 The control device and method of pneumatic machinery automatic transmission shift power
CN110388452A (en) * 2019-07-26 2019-10-29 奇瑞汽车股份有限公司 Hydraulic feed system, control method and automobile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170112784A (en) * 2016-04-01 2017-10-12 엘에스엠트론 주식회사 Hydraulic system for transmission of working vehicle
CN107642604A (en) * 2016-07-20 2018-01-30 现代自动车株式会社 Fluid pressure supply system for the dual-clutch transmission of vehicle
US10428940B2 (en) 2016-07-20 2019-10-01 Hyundai Motor Company Hydraulic pressure supply system of dual clutch transmission for vehicle
CN108413029A (en) * 2018-05-11 2018-08-17 湖北汽车工业学院 The control device and method of pneumatic machinery automatic transmission shift power
CN110388452A (en) * 2019-07-26 2019-10-29 奇瑞汽车股份有限公司 Hydraulic feed system, control method and automobile

Similar Documents

Publication Publication Date Title
KR101566728B1 (en) Oil pressure supply system of automatic transmission
KR101566729B1 (en) Oil pressure supply system of automatic transmission
KR101338454B1 (en) Oil pressure supply system of automatic transmission
JP6151014B2 (en) Hydraulic supply system for automatic transmission for vehicles
KR101394038B1 (en) Oil pressure supply system of automatic transmission
KR101490915B1 (en) Oil pressure supply system of automatic transmission
KR101703621B1 (en) Oil pressure supply system of automatic transmission
KR101461922B1 (en) Oil pressure supply system of automatic transmission
KR101394039B1 (en) Oil pressure supply system of automatic transmission
US8668468B2 (en) Oil pump system for automatic transmission
JP6207368B2 (en) Hydraulic supply system for automatic transmission for vehicles
KR101438607B1 (en) Oil pressure supply system of automatic transmission
KR101484194B1 (en) Hydraulic pressure supply system of automatic transmission
US9291078B2 (en) Hydraulic pressure supply system of automatic transmission
US10502315B2 (en) Oil pressure supply system of automatic transmission
US9903468B2 (en) Hydraulic pressure supply system of automatic transmission
JP2008180303A (en) Hydraulic control device for vehicular automatic transmission
JP2014077536A (en) Hydraulic supply system of vehicular automatic transmission
US10274073B1 (en) Oil pressure supply system of automatic transmission
KR20140075127A (en) Oil pressure supply system of automatic transmission
KR101865716B1 (en) Oil pressure supply system of automatic transmission
KR20140055266A (en) Oil pressure supply system of automatic transmission
KR101601105B1 (en) Oil pressure supply system of automatic transmission
KR101865720B1 (en) Oil pressure supply system of automatic transmission
JP2008180301A (en) Hydraulic control device for vehicular automatic transmission

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application