Hydraulic control system for actuating a shifting element
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-061/26
F16H-061/02
F16H-061/06
출원번호
US-0531812
(2012-06-25)
등록번호
US-9366338
(2016-06-14)
우선권정보
DE-10 2011 078 113 (2011-06-27)
발명자
/ 주소
Herrmann, Markus
Schmidt, Thilo
출원인 / 주소
ZF FRIEDRICHSHAFEN AG
대리인 / 주소
Davis & Bujold PLLC
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A hydraulic system for actuating a transmission shifting element that comprises control and shifting valves. A first surface of a valve slide of the control valve is a differential surface between two functional surfaces of the slide that axially bound an area of the slide having a smaller diameter,
A hydraulic system for actuating a transmission shifting element that comprises control and shifting valves. A first surface of a valve slide of the control valve is a differential surface between two functional surfaces of the slide that axially bound an area of the slide having a smaller diameter, by which the actuation pressure is adjusted. When the shifting valve is in a second switch position, a total force component acts upon the slide of the control valve which moves the slide such that the actuation pressure is equal to a system pressure. The total force component corresponds at least to the sum of a first force component equivalent to a pressure signal applied to a second surface of the slide of the control valve and a second force component equivalent to an actuation pressure applied to the first surface of the slide of the control valve.
대표청구항▼
1. A hydraulic system (1) for actuating at least one shifting element (2) of a transmission device, with a pilot-controlled control valve device (3) and in functional connection therewith an also pilot-controlled shifting valve device (4), an actuation pressure (p2) of the shifting element (2), when
1. A hydraulic system (1) for actuating at least one shifting element (2) of a transmission device, with a pilot-controlled control valve device (3) and in functional connection therewith an also pilot-controlled shifting valve device (4), an actuation pressure (p2) of the shifting element (2), when the shifting valve device (4) is in a first switch position, being regulated by the control valve device (3) within a defined pilot pressure range, and above a pilot pressure value (p_VS) that can be applied to a first functional surface (5) of a valve slide (6) of the shifting valve device (4), the shifting valve device (4) moving to a second switch position, in which the actuation pressure (p2) of the shifting element (2) corresponding to a system pressure (p_sys) that can be applied to the control valve device (3),the actuation pressure (p2) of the shifting element (2) can be applied to a first functional surface (7) of a valve slide (8) of the control valve device (3), acting in a direction which reduces the actuation pressure (p2),the first functional surface (7) of the valve slide (8) of the control valve device (3), to which the actuation pressure (p2) can be applied, being a surface area difference between a pair of facing functional surfaces (10, 11) of the valve slide (8) which, in an axial direction, bound an area (9) of the valve slide (8) of the control valve device (3) with a smaller diameter, by which the actuation pressure (p2) can be adjusted conjointly with switch protrusions (12, 13) such that, when the shifting valve device (4) is in the second switch position, the valve slide (8) of the control valve device (3) being acted upon by a total force component that moves the valve slide (8) of the control valve device (3) to a position in which the actuation pressure (p2) is equal to the system pressure (p_sys), andthe total force component being at least a sum of a first force component equivalent to a pressure signal (p14) applied to a second functional surface (14) of the valve slide (8) of the control valve device (3) and a second force component equivalent to the actuation pressure (p2) applied to the first functional surface (7) of the valve slide (8) of the control valve device (3). 2. The hydraulic system according to claim 1, wherein, in the second switch position of the shifting valve device (4), the actuation pressure (p2) of the shifting element (2) is fed, via the shifting valve device (4), to the second functional surface (14) of the valve slide (8) of the control valve device (3), as the pressure signal (p14) for the control valve device (3). 3. The hydraulic system according to claim 1, wherein, in the second switch position of the shifting valve device (4), the system pressure (p_sys) is applied to the second functional surface (14) of the valve slide (8) of the control valve device (3). 4. The hydraulic system according to claim 1, wherein, in the second switch position of the shifting valve device (4), the actuation pressure (p2) of the shifting element (2) and the pilot pressure (p_VS) of the control valve device (3) are applied, as the pressure signal (p14), to the second functional surface (14) of the valve slide (8) of the control valve device (3). 5. The hydraulic system according to claim 1, wherein, below the predefined pilot pressure value (p_VS), the valve slide (6) of the shifting valve device (4) and the valve slide (8) of the control valve device (3) are in each case movable by a respective spring device (17, 15) to defined starting positions in which the actuation pressure (p2) of the shifting element (2) corresponds to a pre-filling pressure value (p_VB). 6. The hydraulic system according to claim 1, wherein a common pressure regulation device (16) adjusts the pilot pressure (p_VS) of the shifting valve device (4) and the control valve device (3). 7. A hydraulic system (1) for actuating at least one shifting element (2) of a transmission device, the hydraulic system comprising: a pilot-controlled control valve device (3) which is functionally connected with a pilot-controlled shifting valve device (4);the shifting valve device (4) being movable between first and second positions, an actuation pressure (p2) of the shifting element (2) being regulated by the control valve device (3) within a defined pilot pressure range when the shifting valve device (4) is in the first switch position;above a pilot pressure value (p_VS) that is applied to a first functional surface (5) of a valve slide (6) of the shifting valve device (4), the shifting valve device (4) moving to a second switch position and, in the second switch position of the shifting valve device (4), the actuation pressure (p2) of the shifting element (2) corresponding to a system pressure (p_sys) that is applyable to the control valve device (3);the actuation pressure (p2) of the shifting element (2) being applied to a first functional surface (7) of a valve slide (8) of the control valve device (3), acting in a direction which reduces the actuation pressure (p2);the first functional surface (7) of the valve slide (8) of the control valve device (3) being a surface area difference between a pair of facing functional surfaces (10, 11) of the valve slide (8) which, in an axial direction, bound an area (9) of the valve slide (8) of the control valve device (3) with a smaller diameter by which the actuation pressure (p2) is adjustable conjointly with switch protrusions (12, 13), such that when the shifting valve device (4) is in the second switch position, the valve slide (8) of the control valve device (3) being acted upon by a total force component that moves the valve slide (8) of the control valve device (3) to a position in which the actuation pressure (p2) is equal to the system pressure (p_sys); andthe total force component being at least a sum of a first force component that is equivalent to a pressure signal (p14) applied to a second functional surface (14) of the valve slide (8) of the control valve device (3) and a second force component that is equivalent to the actuation pressure (p2) applied to the first functional surface (7) of the valve slide (8) of the control valve device (3).
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (4)
Gierer, Georg; Schmidt, Thilo, Apparatus for the operation of a hydrodynamic torque converter and a therewith corresponding converter bypassing clutch of a transmission apparatus.
Helmer Josef (Aich DEX) Gaus Hermann (Stuttgart DEX), Automatic change-speed transmission with a secondary servo-generator for the emergency supply of aggregates of the trans.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.