KR20160037501A - Hydraulic pressure for auto transmission - Google Patents

Hydraulic pressure for auto transmission Download PDF

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Publication number
KR20160037501A
KR20160037501A KR1020140130116A KR20140130116A KR20160037501A KR 20160037501 A KR20160037501 A KR 20160037501A KR 1020140130116 A KR1020140130116 A KR 1020140130116A KR 20140130116 A KR20140130116 A KR 20140130116A KR 20160037501 A KR20160037501 A KR 20160037501A
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KR
South Korea
Prior art keywords
friction element
solenoid valve
control valve
pressure
hydraulic pressure
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KR1020140130116A
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Korean (ko)
Inventor
박상석
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현대 파워텍 주식회사
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Priority to KR1020140130116A priority Critical patent/KR20160037501A/en
Publication of KR20160037501A publication Critical patent/KR20160037501A/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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • 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
    • 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
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • 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

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

Abstract

The present invention relates to a hydraulic device for an automatic transmission, comprising a plurality of friction element portions, a solenoid valve portion for supplying hydraulic pressure to each friction element portion, and a solenoid valve portion selectively disposed between the friction element portion and the solenoid valve portion, And a fail-safe valve portion for preventing the interlock phenomenon by interrupting the abnormal operation of the friction element portion.

Figure P1020140130116

Description

HYDRAULIC PRESSURE FOR AUTO TRANSMISSION < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic device for an automatic transmission, and more particularly, to a hydraulic device for an automatic transmission in which a fail-safe valve interrupts an abnormal operation of a friction element at a speed change stage to prevent hardware interlocking.

BACKGROUND ART In general, a shift control device of an automatic transmission controls a plurality of solenoid valves to control friction elements (operating elements) such as clutches and brakes.

That is, a pressure control valve is provided between the solenoid valve and the corresponding friction element, and a control pressure line is provided between the solenoid valve and the pressure control valve, which is supplied with the control pressure supplied to the solenoid valve. A working pressure line is followed.

Further, a feedback line for feedback is connected between the pressure control valve and the friction element, and a spring is provided on the pressure control valve side to which the feedback line is connected. The above-described configuration is provided for each of the friction elements (clutches and brakes) constituting the automatic transmission.

By using such a hydraulic control circuit, the solenoid valve provides the required hydraulic pressure in the corresponding friction element (clutch and brake flow) during tightening and adjusts the release hydraulic pressure in order to restrict abrupt release of the corresponding friction element at the time of release.

That is, when the corresponding friction element is fastened, the valve supply pressure supplied to the solenoid valve is supplied to the pressure control valve through the control pressure line. At this time, the pressure control valve provides an operating pressure required by the friction element by using an equilibrium relationship between the supply pressure supplied from the solenoid valve and the supply pressure and the spring force introduced from the feedback line.

Accordingly, the transmission of the driving force (in the case of the clutch) or the rotational restraint (in the case of the brake) is realized through the corresponding friction element, thereby realizing a series of shifting in which the driving force generated from the engine is converted into an appropriate speed- .

On the other hand, when releasing the corresponding friction element, when the operating pressure returning from the operating pressure line in the corresponding friction element flows into the pressure control valve through the feedback line, the action of the spring opens the pressure control valve side to release the operating pressure .

The conventional hydraulic control circuit can not interrupt the abnormal operation of the friction elements at the respective speed change stages and interlock occurs. Therefore, there is a need to improve this.

The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2011-0092684 (published on Aug. 18, 2011, entitled: Friction Element Hydraulic Control Circuit of Automatic Transmission).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hydraulic device for an automatic transmission in which a fail-safe valve interrupts an abnormal operation of a friction element at a speed change stage to prevent hardware interlocking .

A hydraulic device for an automatic transmission according to the present invention comprises: a plurality of friction element parts; A solenoid valve unit for supplying hydraulic pressure to the friction element units; And a fail-safe valve part selectively disposed between the friction element part and the solenoid valve part to control the friction element part.

Wherein the friction element portion includes first to fifth friction elements, and the solenoid valve portion includes first to fifth solenoid valves for supplying hydraulic pressure to the first to fifth friction elements, respectively .

The fail-safe valve portion includes: a third control valve disposed between the third friction element and the third solenoid valve to control the third friction element; A fourth control valve disposed between the fourth friction element and the fourth solenoid valve for controlling the fourth friction element; And a fifth control valve disposed between the fifth friction element and the fifth solenoid valve for controlling the fifth friction element.

And the third control valve is closed when the hydraulic pressure of the second solenoid valve and the hydraulic pressure of the fourth control valve are inputted.

And the fourth control valve is closed when the hydraulic pressure of the first solenoid valve and the hydraulic pressure of the fifth control valve are inputted.

And the fifth control valve is closed when the hydraulic pressure of the first solenoid valve, the hydraulic pressure of the second solenoid valve, and the hydraulic pressure of the third control valve.

The hydraulic device for an automatic transmission according to the present invention can prevent interlocking in hardware by interrupting the abnormal operation of the friction element at each gear range by the control valve.

1 is a view schematically showing a hydraulic device for an automatic transmission according to an embodiment of the present invention.
2 is a view schematically showing an operation table for each gear range of a hydraulic device for an automatic transmission according to an embodiment of the present invention.
3 is a view schematically showing an operating state of a third control valve in a hydraulic device for an automatic transmission according to an embodiment of the present invention.
4 is a view schematically showing an operating state of a fourth control valve in a hydraulic device for an automatic transmission according to an embodiment of the present invention.
5 is a view schematically showing the operating state of the fifth control valve in the hydraulic apparatus for an automatic transmission according to the embodiment of the present invention.
6 is a view schematically showing the operating state of the valve when the speed change stage is changed from the first stage to the second stage in the hydraulic device for an automatic transmission according to the embodiment of the present invention.

Hereinafter, an embodiment of a hydraulic device for an automatic transmission according to 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, terms to be described below are terms defined in consideration of functions in 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.

1 is a view schematically showing a hydraulic device for an automatic transmission according to an embodiment of the present invention. 1, a hydraulic device 1 for an automatic transmission according to an embodiment of the present invention includes a plurality of friction element portions C, a solenoid valve portion 10, and a fail-safe valve portion 20 do.

The plurality of friction element portions C include first, second, third, fourth, and fifth friction elements C1, C2, C3, C4, and C5. The solenoid valve portion 10 includes first, Second, third, fourth, and fifth solenoid valve portions 11, 12, 13, 14, 15. The first solenoid valve 11 supplies the hydraulic pressure to the first friction element C1. The second solenoid valve 12 supplies the hydraulic pressure to the second friction element C2. And the third solenoid valve 13 supplies the hydraulic pressure to the third friction element C3. The fourth solenoid valve 14 supplies the hydraulic pressure to the fourth friction element C4. The fifth solenoid valve 15 supplies the hydraulic pressure to the fifth friction element C5.

The fail-safe valve portion 20 is selectively disposed between the friction element portion C and the solenoid valve portion 10 to control the friction element portion C. [ The fail safe valve unit 20 according to an embodiment of the present invention may include a third control valve 23, a fourth control valve 24, and a fifth control valve 25.

The third control valve 23 is disposed between the third friction element C3 and the third solenoid valve 13 to control the third friction element C3. A fourth control valve 24 is disposed between the fourth friction element C4 and the fourth solenoid valve 14 to control the fourth friction element C4. The fifth control valve 25 is disposed between the fifth friction element C5 and the fifth solenoid valve 15 to control the fifth friction element C5. On the other hand, the hydraulic line 40 is connected to the first, second, third, fourth and fifth solenoid valve portions 11, 12, 13, 14 and 15 to guide the hydraulic pressure for the automatic transmission control .

The first line 51 connects the first solenoid valve 11 and the first friction element C1 and the hydraulic pressure moved through the first line 51 is referred to as C1 pressure. The second line 52 can connect the second solenoid valve 12 and the second friction element C2 and the hydraulic pressure moved through the second line 52 is called the C2 pressure.

The third line 53 connects the third solenoid valve 13 and the third control valve 23 and the hydraulic pressure moved through the third line 53 is called the C3 pressure. The third line 53` can connect the third control valve 23 and the third friction element C3 and the hydraulic pressure moved through the third line 53` is referred to as C3` pressure .

The fourth line 54 can connect the fourth solenoid valve 14 and the fourth control valve 24 and the hydraulic pressure moved through the fourth line 54 is called C4 pressure. The fourth line 54 'may connect the fourth control valve 24 and the fourth friction element C4 and the hydraulic pressure that is moved through the fourth line 54' .

The fifth line 55 connects the fifth solenoid valve 15 and the fifth control valve 25 and the hydraulic pressure moved through the fifth line 55 is called a C5 pressure. The fifth line 55 'may connect the fifth control valve 25 and the fifth friction element C5 and the hydraulic pressure moved through the fifth line 55` may be referred to as C5` pressure .

At this time, the first, second, third, fourth, and fifth lines 51, 52, 53, 54, and 55 are respectively connected to the third, fourth and fifth control valves 23, 3`, 4`, and 5` lines 53 ', 54` and 55` may be selectively connected.

2 is a view schematically showing an operation table for each gear range of a hydraulic device for an automatic transmission according to an embodiment of the present invention. Referring to FIG. 2, the speed change stage of the hydraulic device 1 for an automatic transmission according to an embodiment of the present invention will be schematically described as follows.

The forward first speed gear stage is realized by simultaneously operating the third, fourth and fifth friction elements C3, C4 and C5 and the forward second speed gear stage is implemented by the second, fourth and fifth friction elements C2 and C4 , C5) are implemented simultaneously. The forward third speed change stage is realized by simultaneously operating the second, third and fifth friction elements C2, C3 and C5, and the forward fourth speed change stage is implemented by the first, second and fifth friction elements C1, C2 , C5) are implemented simultaneously. The forward fifth speed gear stage is realized by simultaneously operating the first, third and fifth friction elements C1, C3 and C5, and the forward sixth speed gear stage is constituted by the first, second and third friction elements C1, C2 , C3) are implemented simultaneously. The forward seventh speed change stage is realized by simultaneously operating the first, third and fourth friction elements C1, C3 and C4, and the forward eighth speed change stage is implemented by the first, second and fourth friction elements C1, C2 , C4) are implemented simultaneously.

3 is a view schematically showing an operating state of a third control valve in a hydraulic device for an automatic transmission according to an embodiment of the present invention. Referring to FIGS. 1 and 3, the third control valve 23 according to the embodiment of the present invention is closed when the hydraulic pressure of the second solenoid valve 12 and the hydraulic pressure of the fourth control valve 24 are introduced C3 Control the pressure flow. That is, when the C2 pressure and the C4` pressure are introduced into the third control valve 23 in addition to the C3 pressure, the third control valve 23 disconnects the hydraulic line and blocks the flow of the C3` pressure. As a result, the third friction element (C3) is released by interrupting the supply of hydraulic pressure by hardware, thereby preventing the interlock from occurring.

4 is a view schematically showing an operating state of a fourth control valve in a hydraulic device for an automatic transmission according to an embodiment of the present invention. Referring to FIGS. 1 and 4, the fourth control valve 24 according to the embodiment of the present invention is closed when the hydraulic pressure of the first solenoid valve 11 and the hydraulic pressure of the fifth control valve 25 are introduced Clamp C4 flow. That is, when the C1 pressure and the C5` pressure are introduced into the fourth control valve 24 in addition to the C4 pressure, the fourth control valve 24 disconnects the hydraulic pressure line and cuts off the C4 pressure. As a result, the third friction element C4 is prevented from being interlocked by releasing the supply of hydraulic pressure by hardware.

5 is a view schematically showing the operating state of the fifth control valve in the hydraulic apparatus for an automatic transmission according to the embodiment of the present invention. 1 and 5, a fifth control valve 25 according to an embodiment of the present invention controls the hydraulic pressure of the first solenoid valve 11, the hydraulic pressure of the second solenoid valve 12, When the hydraulic pressure of the valve 23 is inputted, it is closed and the pressure flow of the C5` is interrupted. That is, when the C1 pressure, the C2 pressure, and the C3 pressure are introduced into the fifth control valve 25 in addition to the C5 pressure, the fifth control valve 25 disconnects the hydraulic line to block the flow of the C5 pressure . Therefore, the fifth friction element C5 is prevented from being interlocked by releasing the supply of hydraulic pressure by hardware.

6 is a view schematically showing the operating state of the valve when the speed change stage is changed from the first stage to the second stage in the hydraulic device for an automatic transmission according to the embodiment of the present invention. Referring to FIGS. 1, 3 and 6, when the solenoid valve 10 is normally operated, the forward first-speed range shift stage includes third, fourth and fifth friction elements C3, C4 and C5 And the forward second speed gear stage is implemented by simultaneously operating the second, fourth, and fifth friction elements C2, C4, and C5 (see FIG. 6A).

However, in the event of a failure of the third solenoid valve 13 or an error in the system, the C3 pressure is continuously supplied even if the forward first-speed range shift stage is changed to the forward second-speed shift stage, (See FIG. 6B). If the third frictional element C3 is not released in this way, interlock phenomenon may occur.

At this time, when the C2 pressure and the C4` pressure are introduced into the third control valve 23 in addition to the C3 pressure, the third control valve 23 disconnects the hydraulic line and blocks the flow of the C3` pressure (see FIG. 6C) . As a result, the third friction element (C3) is released by interrupting the supply of hydraulic pressure by hardware, thereby preventing the interlock from occurring.

The hydraulic device 1 for an automatic transmission according to the embodiment of the present invention is configured such that the abnormal operation of the friction elements C1, C2, C3, C4, C5 at each gear range is blocked by the control valves 23, 24, 25 Hardware interlock can be prevented.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

C: Friction element part
C1, C2, C3, C4, C5: first, second, third, fourth and fifth friction elements
10: Solenoid valve section
11, 12, 13, 14, 15: first, second, third, fourth and fifth solenoid valves
20: Fail-safe valve portion
23, 24, 25: third, fourth and fifth control valves

Claims (5)

A friction element portion including first to fifth friction elements;
A solenoid valve unit including a first friction element first solenoid valve to a fifth solenoid valve for supplying hydraulic pressure to the first to fifth friction elements, respectively; And
And a fail-safe valve part selectively disposed between the friction element part and the solenoid valve part to control the friction element part.
2. The fuel cell system according to claim 1, wherein the fail-
A third control valve disposed between the third friction element and the third solenoid valve for controlling the third friction element;
A fourth control valve disposed between the fourth friction element and the fourth solenoid valve for controlling the fourth friction element; And
And a fifth control valve disposed between the fifth friction element and the fifth solenoid valve for controlling the fifth friction element.
3. The control valve according to claim 2, wherein the third control valve
And the second solenoid valve is closed by the hydraulic pressure of the second solenoid valve and the hydraulic pressure of the fourth control valve.
The control valve according to claim 2, wherein the fourth control valve
Wherein the hydraulic pressure of the first solenoid valve and the hydraulic pressure of the fifth control valve are closed.
3. The control valve according to claim 2, wherein the fifth control valve
Wherein the first solenoid valve is closed by the hydraulic pressure of the first solenoid valve, the hydraulic pressure of the second solenoid valve, and the hydraulic pressure of the third control valve.
KR1020140130116A 2014-09-29 2014-09-29 Hydraulic pressure for auto transmission KR20160037501A (en)

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KR1020140130116A KR20160037501A (en) 2014-09-29 2014-09-29 Hydraulic pressure for auto transmission

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102074642B1 (en) * 2018-10-23 2020-03-02 현대 파워텍 주식회사 Hydraulic device for multi speed transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102074642B1 (en) * 2018-10-23 2020-03-02 현대 파워텍 주식회사 Hydraulic device for multi speed transmission

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