KR100423320B1 - Drain structure of hydraulic valve - Google Patents
Drain structure of hydraulic valve Download PDFInfo
- Publication number
- KR100423320B1 KR100423320B1 KR10-2001-0060951A KR20010060951A KR100423320B1 KR 100423320 B1 KR100423320 B1 KR 100423320B1 KR 20010060951 A KR20010060951 A KR 20010060951A KR 100423320 B1 KR100423320 B1 KR 100423320B1
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- South Korea
- Prior art keywords
- spool
- discharge
- filling space
- oil
- hydraulic valve
- Prior art date
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Classifications
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
본 발명은 유압밸브의 드레인 구조에 관한 것으로, 오일을 완전히 배출시켜 스풀의 복귀 이동 시 오일의 점성에 의한 스풀의 이동을 방해받지 않도록 하여 응답성을 저하시키지 않도록 함에 그 목적이 있다.The present invention relates to a drain structure of a hydraulic valve, and an object thereof is to completely discharge the oil so that the responsiveness of the spool is not hindered by the viscosity of the oil during the return movement of the spool.
상기와 같은 목적을 달성하기 위한 본 발명은, 밸브바디에 수용된 스풀(1)의 이동에 의해 누유된 오일을 드레인 시키는 배출챔버(3)가 스풀(1)의 끝단을 감싸는 슬리브(2)와 플러그(2')에 형성되되, 이 배출챔버(3)는 스풀(1)의 갭(D)을 통해 유입된 오일이 충진되는 소정 공간을 형성하는 충진공간(3a)과, 상기 배출단(1b)의 직경에 의해 충진공간(3a)과 완전히 차단되지 않고 일정한 틈새를 형성하도록 충진공간(3a)의 상부부위에서 형성된 배출포트(3b)로 이루어진 것을 특징으로 한다.The present invention for achieving the above object, the sleeve 2 and the plug for discharging the oil leaked by the movement of the spool (1) accommodated in the valve body wraps around the end of the spool (1) It is formed in the (2 '), the discharge chamber 3 is a filling space (3a) and a discharge space (1b) to form a predetermined space filled with the oil introduced through the gap (D) of the spool (1) It is characterized by consisting of the discharge port (3b) formed in the upper portion of the filling space (3a) to form a predetermined gap without being completely blocked with the filling space (3a) by the diameter of.
Description
본 발명은 유압밸브의 드레인 구조에 관한 것으로, 보다 상세하게는 누유된 오일을 완전히 배출시켜 점성저항에 의한 복귀이동을 방해받지 않도록 된 유압밸브의 드레인 구조에 관한 것이다.The present invention relates to a drainage structure of a hydraulic valve, and more particularly, to a drainage structure of a hydraulic valve so as to completely discharge the leaked oil so as not to be prevented from the return movement by the viscous resistance.
일반적으로 자동변속기는 토오크 컨버터와, 이 토오크 컨버터에 연결되어 있는 다단 변속 메카니즘을 가지고 있으며, 차량의 주행상태에 따라 변속기어 메카니즘의 기어단 중 어느 하나의 기어단을 선택하기 위한 유압작동 마찰요소를 포함하고 있다.In general, an automatic transmission has a torque converter and a multistage shift mechanism connected to the torque converter, and a hydraulically operated friction element for selecting one of the gear stages of the transmission gear mechanism according to the driving condition of the vehicle. It is included.
이러한 자동차용 자동변속기의 유압제어 시스템은, 오일펌프로부터 발생된 유압을 제어 밸브를 통하여 마찰요소를 선택하여 작동시킴으로서 차량의 주행상태에 따라 적절한 변속이 자동적으로 행하여질 수 있도록 하는 작용을 한다.The hydraulic control system of the automatic transmission for a vehicle operates the hydraulic pressure generated from the oil pump through a control valve to select and operate a friction element so that an appropriate shift can be automatically performed according to the driving state of the vehicle.
여기서, 상기 유압 제어 시스템은 도 1에 도시된 바와 같이 엔진의 크랭크 축과 변속기 사이에 위치하여 동력을 전달하는 토오크 컨버터(10)의 펌프 드라이브 허브에 설치되어 함께 회전하는 드라이브 기어 및 이 드라이브 기어에 치차 결합된 드리븐 기어를 보유하는 오일펌프(20)와, 이 오일펌프(20)에서 생성된 유압으로 마찰요소를 제어하기 위하여 일정한 압으로 변환시키는 압력 조절부(A), 상기 오일펌프(20)에서 생성된 유압을 가변시켜 토오크 컨버터(10)의 댐퍼 클러치를 작동/비작동시키는 댐퍼 클러치 제어부(B), 운전자의 의지대로 소정의 변속단을 구현하기 위하여 시프트 레버와 연동되어 압력조절부(A)의 유압을 공급받아 각 마찰요소에 전달하기 위한 매뉴얼 밸브(C), 상기 압력조절부(A)에서 조절된 유압및 매뉴얼 밸브(C)를 통하여 공급되는 유압을 선택적으로 공급받아 작동이 이루어지는 마찰요소부(D), 상기 마찰요소부(D)에 오일펌프(20)로부터 나오는 라인압 또는 매뉴얼 밸브를 거쳐 나오는 드라이브 압을 트랜스밋션 제어 유닛에 의하여 듀티 제어되어 마찰요소로 선택적으로 공급하기 위한 마찰요소 제어부(E)로 이루어진다.Here, the hydraulic control system is installed in the pump drive hub of the torque converter 10 for transmitting power located between the crankshaft of the engine and the transmission as shown in FIG. An oil pump 20 having gear driven drive gears, a pressure adjusting unit A for converting a constant pressure to control friction elements by hydraulic pressure generated in the oil pump 20, and the oil pump 20. The damper clutch control unit (B) for operating / deactivating the damper clutch of the torque converter 10 by varying the hydraulic pressure generated in the controller, and the pressure control unit (A) interlocked with the shift lever to implement a predetermined shift stage at the driver's will. Manual valve (C) for receiving the hydraulic pressure of the delivered to each friction element, supplied through the hydraulic pressure and manual valve (C) adjusted in the pressure adjusting unit (A) The duty control is performed by the transmission control unit to control the friction element part D, which is selectively supplied with the pressure, to operate the line pressure from the oil pump 20 to the friction element part D or the drive pressure through the manual valve. And a friction element controller E for selectively supplying the friction element.
이와 같이 오일펌프(20)로부터 펌핑된 오일의 유압을 각 구성부로 공급하여 작동시키는 유압 작용 밸브(V)는 유압에 의해 이동되면서 각 구성부를 서로 연결하는 유압회로를 선택적으로 개·폐하게 되는데 즉, 도 2에 도시된 바와 같이 밸브바디(도시되어있지 않음)에 수용되어 긴 로드형상으로 이루어진 스풀(1)에 유압회로를 개·폐하도록 상대적으로 큰 직경으로 이루어진 랜드(1a,1a')가 형성되는 한편, 상기 스풀(1)의 끝단부위를 감싸면서 상기 랜드(1a,1a')와 밸브바디사이의 틈새를 통해 누유된 오일을 드레인시키는 배출챔버(3)가 형성된 슬리브(2)와 플러그(2')가 결합되어진다.In this way, the hydraulic valve (V) for supplying and operating the hydraulic pressure of the oil pumped from the oil pump 20 to each component is moved by the hydraulic pressure selectively opens and closes the hydraulic circuit connecting each component to each other. As shown in FIG. 2, lands 1a and 1a 'having a relatively large diameter are accommodated in a valve body (not shown) to open and close a hydraulic circuit in a spool 1 having a long rod shape. And a sleeve (2) and a plug having a discharge chamber (3) having a discharge chamber (3) for draining the oil leaked through the gap between the lands (1a, 1a ') and the valve body while covering the end portion of the spool (1). (2 ') is combined.
여기서, 상기 배출챔버(3)는 스풀(1)의 끝단을 이루는 배출단(1b)을 수용하면서 갭(D)을 통해 유입된 오일이 충진되는 소정 공간을 형성하는 충진공간(3a)과, 상기 배출단(1b)의 이동에 의해 충진된 오일이 배출되도록 상기 슬리브(2)와 플러그(2')의 중앙부위를 관통한 배출포트(3b)로 이루어진다.Here, the discharge chamber 3 has a filling space (3a) for receiving a discharge end (1b) forming the end of the spool (1) to form a predetermined space filled with the oil introduced through the gap (D), and It consists of a discharge port (3b) penetrating the center portion of the sleeve 2 and the plug (2 ') so that the oil filled by the movement of the discharge end (1b) is discharged.
그러나, 이와 같이 배출챔버(3)가 스풀(1)의 끝단부위를 감싸면서 누유된 오일을 저장하는 원형 공간인 충진공간(3a)을 형성하고 그 중앙부위로 연통된 배출포트(3b)가 형성되면, 상기 스풀(1)이 이동(도2에서 우측방향)되면서 상기 충진공간(3a)내 오일을 가압해 배출포트(3b)로 배출시키게 되지만 상기 배출단(1b)이 충진공간(3a)의 끝과 밀착되어 배출통로(3b)를 완전히 차단하게 되면충진공간(3a)내의 오일이 완전히 배출되지 못하는 현상이 있게 된다.However, when the discharge chamber 3 forms the filling space 3a, which is a circular space for storing the leaked oil while surrounding the end portion of the spool 1, and the discharge port 3b communicating with the central portion is formed. While the spool 1 is moved (rightward in FIG. 2), the oil in the filling space 3a is pressurized to be discharged to the discharge port 3b, but the discharge end 1b is the end of the filling space 3a. In close contact with the discharge passage 3b, the oil in the filling space 3a is not completely discharged.
이와 같이, 상기 충진공간(3a)내에 충진된 오일이 완전히 배출되지 못하면 스풀(1)의 복귀(도 2에서 좌측방향)시 충진공간(3a)내 가압된 오일의 점성에 의해 그 이동속도가 감소되는 현상이 발생되고 이로 인해, 자동변속기의 응답성이 저하될 수 있는 문제가 있게 된다.As such, when the oil filled in the filling space 3a is not completely discharged, the moving speed decreases due to the viscosity of the pressurized oil in the filling space 3a when the spool 1 is returned (left direction in FIG. 2). This phenomenon occurs, which causes a problem that the response of the automatic transmission may be lowered.
이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 오일을 완전히 배출시켜 스풀의 복귀 이동 시 오일의 점성에 의한 스풀의 이동을 방해받지 않도록 하여 응답성을 저하시키지 않도록 함에 그 목적이 있다.Accordingly, the present invention has been made in view of the above-mentioned point, and has an object to prevent the responsiveness from being lowered by completely discharging the oil so as not to disturb the movement of the spool due to the viscosity of the oil during the return movement of the spool.
상기와 같은 목적을 달성하기 위한 본 발명은, 밸브바디에 수용된 스풀의 이동에 의해 누유된 오일을 드레인 시키는 배출챔버가 스풀의 끝단을 감싸는 슬리브와 플러그에 형성되되, 이 배출챔버는 스풀의 갭을 통해 유입된 오일이 충진되는 소정 공간을 형성하는 충진공간과, 상기 배출단의 직경에 의해 충진공간과 완전히 차단되지 않고 일정한 틈새를 형성하도록 충진공간의 상부부위에서 형성된 배출포트로 이루어진 것을 특징으로 한다.The present invention for achieving the above object, the discharge chamber for draining the oil leaked by the movement of the spool accommodated in the valve body is formed in the sleeve and plug surrounding the end of the spool, the discharge chamber is a gap of the spool Filling space to form a predetermined space is filled with the oil introduced through the, characterized in that consisting of the discharge port formed in the upper portion of the filling space to form a predetermined gap without being completely blocked by the filling space by the diameter of the discharge end .
도 1은 일반적인 자동변속기의 유압회로 구성도1 is a configuration diagram of a hydraulic circuit of a general automatic transmission
도 2는 종래에 따른 유압밸브의 드레인 구조도2 is a drain structure diagram of a conventional hydraulic valve
도 3은 본 발명에 따른 유압밸브의 드레인 구조도3 is a drain structure diagram of a hydraulic valve according to the present invention;
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 : 스풀 1a,1a' : 랜드1: Spool 1a, 1a ': Land
1b : 배출단 2 : 슬리브1b: discharge stage 2: sleeve
2' : 플러그 3 : 배출챔버2 ': plug 3: discharge chamber
3a : 충진공간 3a' : 계단벽3a: Filling space 3a ': Stair wall
3b,3b',3b" : 배출포트3b, 3b ', 3b ": discharge port
10 : 토오크컨버터 20 : 오일펌프10: torque converter 20: oil pump
V : 밸브V: Valve
이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 발명에 따른 유압밸브의 드레인 구조도를 도시한 것인바, 본 발명은 밸브바디에 수용된 스풀(1)에 일체로 형성되어 이동에 의해 유로를 개·폐하는 다수의 랜드(1a,1a')부위를 통해 누유된 오일을 드레인 시키도록 그 끝단에 형성된 배출단(1b)을 감싸는 슬리브(2)와 플러그(2')에 배출챔버(3)가 형성되되, 이 배출챔버(3)는 스풀(1)의 갭(D)을 통해 유입된 오일이 충진되는 소정 공간을 형성하는 충진공간(3a)과, 상기 배출단(1b)의 직경에 의해 충진공간(3a)과 완전히 차단되지 않고 일정한 틈새를 형성하도록 충진공간(3a)의 상부부위에서 형성된 배출포트(3b)로 이루어진다.Figure 3 shows a drain structure diagram of the hydraulic valve according to the present invention, the present invention is formed integrally with the spool (1) accommodated in the valve body a plurality of lands (1a, 1a) to open and close the flow path by movement A discharge chamber 3 is formed in the sleeve 2 and the plug 2 'surrounding the discharge end 1b formed at its end to drain the oil leaked through the') portion, and the discharge chamber 3 is Filling space (3a) to form a predetermined space for filling the oil introduced through the gap (D) of the spool (1), and the diameter of the discharge end (1b) is not completely blocked and filled with the filling space (3a) It consists of a discharge port (3b) formed in the upper portion of the filling space (3a) to form a gap.
여기서, 상기 충진공간(3a)은 그 끝단이 배출포트(3b)의 끝 부위와 단계적으로 일치되도록 경사지게 형성되는 계단벽(3a')을 이루게 된다.Here, the filling space (3a) forms a stepped wall (3a ') that is inclined so that the end thereof coincides stepwise with the end portion of the discharge port (3b).
또한, 상기 배출포트(3b)은 충진공간(3a)이 형성된 슬리브(2)에서 형성되어 플러그(2')에 동일선상으로 형성되면서 소정각도(a)로 다수 위치로 형성되되, 바람직하게는 약 120°각도로 3곳에 대칭적으로 형성되어진다.In addition, the discharge port (3b) is formed in the sleeve (2) having the filling space (3a) is formed in a plurality of positions at a predetermined angle (a) while being formed in the same line in the plug (2 '), preferably about It is formed symmetrically in three places at 120 ° angle.
이하 본 발명을 첨부된 도면을 참조로 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
본 발명은 밸브바디 내에서 유압에 의해 이동되면서 유압을 공급하는 스풀(1)의 랜드(1a,1a')와 밸브바디사이의 갭(D)을 통해 누유된 오일이 스풀(1)의 끝단부위인 배출단(1b)부위를 감싸는 슬리브(2)에 형성된 배출챔버(3)의 충진공간(3a)으로 유입되면, 스플(1)의 이동(도 2에서 우측으로)에 의해 상기 충진공간(3a)에 수용된 배출단(1b)이 오일을 가압하면서 충진공간(3a)내의 오일을 연통된 배출포트(3b)로 이동시켜 배출되어진다.In the present invention, the oil leaked through the gap (D) between the land (1a, 1a ') and the valve body of the spool (1) for supplying hydraulic pressure while being moved by the hydraulic pressure in the valve body end portion of the spool (1) When it enters the filling space 3a of the discharge chamber 3 formed in the sleeve 2 surrounding the phosphorus discharge stage 1b, the filling space 3a is moved by the movement of the spool 1 (to the right in FIG. 2). The discharge stage (1b) accommodated in the) is discharged by moving the oil in the filling space (3a) to the communication port (3b) connected to the pressurized oil.
이때, 상기 스풀(1)의 배출단(1b)이 배출챔버(3)의 충진공간(3a)의 일측으로 완전히 밀착되더라도 배출포트(3b)는 상기 배출단(1b)의 직경에 의해 충진공간(3a)과 완전히 차단되지 않고 일정한 틈새를 형성하게 되므로 지속적인 오일의 배출이 이루어지게 된다.At this time, even if the discharge end (1b) of the spool 1 is in close contact with one side of the filling space (3a) of the discharge chamber 3, the discharge port (3b) is filled by the diameter of the discharge end (1b) Since it forms a certain gap without being completely blocked with 3a), continuous oil discharge is achieved.
한편, 스풀(1)이 다시 반대로 이동(도 2에서 좌측으로)하면 스풀(1)과 함께 이동되는 배출단(1b)이 오일의 점성에 의한 이동 방해 현상의 발생이 없게 되는데 이는, 상기 배출단(1b)을 감싼 배출챔버(3)의 충진공간(3a)과 배출포트(3b)가 항상 연통 되어있어 충진공간(3a)내의 오일이 배출단(1b)에 의해 가압된 상태를 유지하지 않고 지속적으로 배출되므로 이에 따라, 이동되는 배출단(1b)의 이동 방향에 저항하는 가압된 오일의 점성이 작용하지 않게 되므로 그 이동속도의 저감이 방지됨은 물론 자동변속기의 응답성 저하가 없게 된다.On the other hand, if the spool 1 is moved again in the opposite direction (to the left in FIG. 2), the discharge end 1b moved together with the spool 1 does not cause the movement obstruction due to the viscosity of the oil, which is the discharge end. The filling space 3a and the discharge port 3b of the discharge chamber 3 surrounding (1b) are always in communication so that the oil in the filling space 3a does not remain pressurized by the discharge stage 1b. Therefore, since the viscosity of the pressurized oil that resists the moving direction of the discharging stage 1b to be moved does not work, the reduction of the moving speed is prevented and the response of the automatic transmission is not lowered.
이상 설명한 바와 같이 본 발명에 의하면, 밸브바디에 수용된 스풀내의 누유된 오일을 배출하는 배출챔버가 오일을 가압해 배출시키는 스풀에 의해 완전히 차단되지 않고 항상 일정한 틈새를 형성해 완전한 배출이 이루어짐은 물론 배출챔버내 충진된 오일의 압력 상승을 방지해 스풀의 복귀 시 배출챔버내 오일에 의한 이동속도 저하를 완전히 방지하여 자동변속기의 응답성을 저하시키지 않는 효과가 있게 된다.As described above, according to the present invention, the discharge chamber for discharging the leaked oil in the spool accommodated in the valve body is not completely blocked by the spool for pressurizing and discharging the oil, and always forms a constant gap to completely discharge the discharge chamber. By preventing the increase in the pressure of the oil filled inside, it is possible to completely prevent the movement speed by the oil in the discharge chamber when the spool returns, thereby reducing the responsiveness of the automatic transmission.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0060951A KR100423320B1 (en) | 2001-09-29 | 2001-09-29 | Drain structure of hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0060951A KR100423320B1 (en) | 2001-09-29 | 2001-09-29 | Drain structure of hydraulic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20030027597A KR20030027597A (en) | 2003-04-07 |
| KR100423320B1 true KR100423320B1 (en) | 2004-03-18 |
Family
ID=29563102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2001-0060951A KR100423320B1 (en) | 2001-09-29 | 2001-09-29 | Drain structure of hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100423320B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07269724A (en) * | 1994-03-28 | 1995-10-20 | Riken Corp | Spool |
| KR19980044097U (en) * | 1996-12-26 | 1998-09-25 | 박병재 | Rear Clutch Discharge Valve for Hydraulic Control System |
| US5848613A (en) * | 1995-08-11 | 1998-12-15 | Aisin Aw Co., Ltd. | Electromagnetic pressure regulating valve |
| KR20000055786A (en) * | 1999-02-10 | 2000-09-15 | 정몽규 | Manual valve of hydraulic control system for automatic transmission |
| JP2001138894A (en) * | 1999-11-17 | 2001-05-22 | Aisin Seiki Co Ltd | High pressure fluid feeding apparatus and hydraulic brake device for vehicle provided with the apparatus |
-
2001
- 2001-09-29 KR KR10-2001-0060951A patent/KR100423320B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07269724A (en) * | 1994-03-28 | 1995-10-20 | Riken Corp | Spool |
| US5848613A (en) * | 1995-08-11 | 1998-12-15 | Aisin Aw Co., Ltd. | Electromagnetic pressure regulating valve |
| KR19980044097U (en) * | 1996-12-26 | 1998-09-25 | 박병재 | Rear Clutch Discharge Valve for Hydraulic Control System |
| KR20000055786A (en) * | 1999-02-10 | 2000-09-15 | 정몽규 | Manual valve of hydraulic control system for automatic transmission |
| JP2001138894A (en) * | 1999-11-17 | 2001-05-22 | Aisin Seiki Co Ltd | High pressure fluid feeding apparatus and hydraulic brake device for vehicle provided with the apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030027597A (en) | 2003-04-07 |
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