Control apparatus for transmission
US-2015345634-A1 · Dec 3, 2015 · US
Hydraulic control system for actuating a shifting element
US9366338B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9366338-B2 |
| Application number | US-201213531812-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 25, 2012 |
| Priority date | Jun 27, 2011 |
| Publication date | Jun 14, 2016 |
| Grant date | Jun 14, 2016 |
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
The invention claimed is: 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 (p 2 ) 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 r…
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- F16H61/0206Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9366338B2 cover?
- 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 posit…
- Who is the assignee on this patent?
- Herrmann Markus, Schmidt Thilo, Zahnradfabrik Friedrichshafen
- What technology area does this patent fall under?
- Primary CPC classification F16H61/0206. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 14 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).