Hydraulic pressure supply system of automatic transmission
US-9206792-B2 · Dec 8, 2015 · US
Hydraulic device for stepless transmission
US8943818B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8943818-B2 |
| Application number | US-200913256526-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 13, 2009 |
| Priority date | May 13, 2009 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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- Title
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Abstract
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A hydraulic device includes a switch-over valve 1140 provided at a section of a sub-passage 1105 located downstream of a location where a first bypass passage 1117 is connected and located upstream of a primary regulator 1110 . The switch-over valve 1140 is switched between a blocked state, where supply of hydraulic oil to a section of the sub-passage 1105 located downstream of the switch-over valve 1140 is blocked, and a communication state, where supply of hydraulic oil to the section of the sub-passage 1105 located downstream of the switch-over valve 1140 is permitted. In the hydraulic device, when the switch-over valve 1140 is switched to the communication state, as a discharge performance of a main pump 1102 increases, a first check valve 1118 closes. Supply paths for hydraulic oil discharged from the sub-pump 1103 are automatically switched in accordance with the discharge performance of the main pump 1102 . When the switch-over valve 1140 is switched to the blocked state, the first check valve 1118 opens and hydraulic oil discharged from the sub-pump 1103 is introduced into a main passage 1104.
First claim
Opening claim text (preview).
The invention claimed is: 1. A hydraulic device for a stepless transmission, the hydraulic device comprising: an engine-driven main pump and an engine-driven sub-pump; a main passage for connecting the main pump to a speed-changing hydraulic pressure circuit and a lubricating-hydraulic pressure circuit; a sub-passage for connecting the sub-pump to the lubricating-hydraulic pressure circuit; a regulator that opens when the hydraulic pressure of hydraulic oil supplied to the s…
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Classifications
- F16H61/0031Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8943818B2 cover?
- A hydraulic device includes a switch-over valve 1140 provided at a section of a sub-passage 1105 located downstream of a location where a first bypass passage 1117 is connected and located upstream of a primary regulator 1110 . The switch-over valve 1140 is switched between a blocked state, where supply of hydraulic oil to a section of the sub-passage 1105 located downstream of the s…
- Who is the assignee on this patent?
- Ogata Yusuke, Tanaka Koichi, Takahashi Nobuaki, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification F16H61/0031. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 03 2015 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).