Hydraulic control arrangement for an automatic transmission
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-061/02
F16H-061/06
F16K-015/18
F16K-017/04
F16K-031/122
F04C-014/26
F16D-048/02
출원번호
US-0902019
(2014-06-03)
등록번호
US-10100924
(2018-10-16)
우선권정보
DE-10 2013 212 947 (2013-07-03)
국제출원번호
PCT/EP2014/061427
(2014-06-03)
국제공개번호
WO2015/000653
(2015-01-08)
발명자
/ 주소
Schiele, Peter
Gethöfer, Frank
출원인 / 주소
ZF Friedrichshafen AG
대리인 / 주소
Dority & Manning, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A hydraulic control device for an automatic transmission including a valve device. The valve device comprising a switching valve, featuring a switching component and a check valve. The switching valve is formed in a housing and is hydraulically connected to a first pressure adjusting device and a se
A hydraulic control device for an automatic transmission including a valve device. The valve device comprising a switching valve, featuring a switching component and a check valve. The switching valve is formed in a housing and is hydraulically connected to a first pressure adjusting device and a second pressure adjusting device along with a shift element for transferring a certain torque. The switching valve is formed as a directional seat valve.
대표청구항▼
1. A hydraulic control device for an automatic transmission, comprising: a housing:a valve device, the valve device further comprising: a switching valve (10) formed in the housing and hydraulically connected through the housing to a first pressure adjusting device (HCU) and a second pressure adjust
1. A hydraulic control device for an automatic transmission, comprising: a housing:a valve device, the valve device further comprising: a switching valve (10) formed in the housing and hydraulically connected through the housing to a first pressure adjusting device (HCU) and a second pressure adjusting device (EDS), the switching valve also connected to a shift element (K) that transfers torque in the automatic transmission;a switching component (11);a check valve (20);wherein the pressure adjusting devices (HCU, EDS) are supplied with a pressure medium and, under effect of a switching pressure (p_S) at the switching component (11) generated by the second pressure adjusting device (EDS), the switching component (11) is moved into and held at a first switching position where the first pressure adjusting device (HCU) is hydraulically connected through the switching valve (10) to the shift element (K) such that a flow of pressure medium from the first pressure device (HCU) is supplied to the shift element (K);wherein below a certain value of the switching pressure (p_S), the switching component (11) is moved to a second switching position where inflow of the pressure medium from the first pressure adjusting device (HCU) at the shift element (K) is interrupted;the check valve (20) arranged such that, in the second switching position of the switching component (11), the pressure medium flows from the shift element (K) through the check valve (20) to a vented area of the hydraulic control device; andthe switching valve (10) formed as a directional seat valve. 2. The hydraulic control device according to claim 1, wherein the check valve (20) is arranged in the switching component (11) of the switching valve (10). 3. The hydraulic control device according to claim 1, wherein the check valve (320) and the switching valve (310) are arranged separately in the housing (330) of the hydraulic control device. 4. The hydraulic control device according to claim 1, wherein the switching component comprises a seat piston (11) having a first and a second cylindrical piston section (41, 42), the first piston section (41) having a diameter that is smaller than a diameter of the second piston section (42), the seat piston further comprising a radially extending annular surface between the first and second piston sections (41, 42) resulting from a difference between the two diameters, the annular surface defining a switching pressure surface (18). 5. The hydraulic control device according to claim 4, wherein: the seat piston (11) is guided in an axially displaceable manner into a stepped bore (38) formed in the housing (30);in the first switching position, a first end (45) of the seat piston (11) abuts on a stop (13);in the second switching position, a second end (46) of the seat piston abuts on a valve seat (39) formed in the housing (30);the stepped bore (38) is radially penetrated by a coupling channel (35) to the shift element 9K), a supply channel (36) from the first pressure adjusting device (HCU), and a switching pressure channel (37) from the second pressure adjusting device (EDS); andthe switching pressure channel (37) arranged such that the switching pressure surface (18) of the seat piston (11) is subjected to the switching pressure (p_S) acting in the switching pressure channel (37) in each of the first and second switching positions of the seat piston (11). 6. The hydraulic control device according to claim 5, wherein the switching valve (10) further comprises: a pressure spring (12) arranged between the seat piston (11) and the stop (13) fixed within the housing;wherein upon pressurization of the switching pressure surface (18) by the switching pressure (p_S), the switching component (11) is displaceable in an axial direction of a central axis (M) of the switching valve (10) against a force of the pressure spring (12) in the first switching position; andwherein with an unpressurized switching pressure channel (37) or a vented second pressure adjusting device (EDS), the seat piston (11) occupies the second switching position due to the force of the switching valve spring (12). 7. The hydraulic control device according to claim 1, wherein the check valve (20) is formed as a seat valve having a seat piston (21, 321) and a check valve spring (23) arranged between a check valve stop (15, 315) and the seat piston (21, 321), wherein a closing force of the check valve spring biases the seat piston (21, 321) in the direction of a check valve seat (17, 317). 8. The hydraulic control device according to claim 7, wherein the switching component comprises a seat piston (11), wherein the check valve stop (15) and the check valve seat (17) are formed in the seat piston (11) of the switching component. 9. The hydraulic control device according to claim 7, wherein the check valve stop (315) and the check valve seat (317) are formed in the housing (330) of the hydraulic control device. 10. The hydraulic control device according to claim 1, wherein in the second switching position of the switching component (11) and above a shift element pressure value (p_K*): the check valve (20) permits pressure medium flow from the shift element (K) to the first or the second pressure adjusting device (EDS, HCU) if the pressure (p_S, p_HCU) of the respective pressure adjusting device is lower than the shift element pressure (p_K) or corresponds to ambient pressure (p_0); andthe check valve (20) blocks flow of the pressure medium from the respective pressure adjusting devices (EDS, HCU) to the shift element (K). 11. The hydraulic control device according to claim 10, wherein in the second switching position of the switching component (11), the shift element (K) is hydraulically connected through the check valve (20) and a connection channel (214) formed in the switching component (11) to the second pressure adjusting device (EDS). 12. The hydraulic control device according to claim 10, wherein in the second switching position of the switching component (11), the shift element (K) is hydraulically connected through the check valve (20) and a connection channel (14) formed in the switching component (11) to the first pressure adjusting device (HCU). 13. The hydraulic control device according to claim 10, wherein in the second switching position of the switching component (11), the shift element (K) is hydraulically connected through the check valve and a connection channel (314) formed in the housing (330) to the first pressure adjusting device (HCU). 14. The hydraulic control device according to claim 10, wherein in the second switching position of the switching component (11), the shift element is hydraulically connected through the check valve and a connection channel formed in the housing to the second pressure adjusting device. 15. An automatic transmission, comprising a hydraulic control device in accordance with claim 1.
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이 특허에 인용된 특허 (3)
Gierer, Georg; Schmidt, Thilo; Steinhauser, Klaus, Electronic-hydraulic control for automobile drive systems with automatic gear shifting.
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