Work vehicle and control method thereof
US-2015367851-A1 · Dec 24, 2015 · US
Continuously-variable transmission and continuously-variable transmission control method
US9080671B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9080671-B2 |
| Application number | US-201214364591-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 12, 2012 |
| Priority date | Dec 13, 2011 |
| Publication date | Jul 14, 2015 |
| Grant date | Jul 14, 2015 |
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Abstract
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A first determining unit configured to determine whether the indicated pressure of a primary pulley pressure has become a line pressure during an up shift, an indicated pressure control unit configured to make the indicated pressure of the primary pulley pressure alone higher than the line pressure when the target shift rate is determined to be equal to or lower than a predetermined shift rate and the speed ratio is determined not to have become the target speed ratio, and an estimated time detecting unit configured to detect a predetermined time it takes until the primary pulley pressure can be regarded as being equal to the line pressure after the target shift rate is determined to be equal to or lower than the predetermined shift rate, and the indicated pressure of the primary pulley pressure is made higher than the line pressure, are provided, and the indicated pressure control unit is configured to calculate the deviation between the indicated pressure of the primary pulley pressure and indicated pressure of the line pressure after the estimated predetermined time is over, and control transmission of a continuously-variable transmission while maintaining the deviation after the predetermined time is over.
First claim
Opening claim text (preview).
The invention claimed is: 1. A continuously-variable transmission which uses a secondary pulley pressure as a line pressure, and which adjusts the line pressure to a primary pulley pressure, the continuously-variable transmission comprising: a first determining unit configured to determine whether an indicated pressure of the primary pulley pressure has become the line pressure during an up shift; a second determining unit configured to determine whether a target shift rate of t…
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Classifications
Mechanical Engineering · mapped topic
- F16H61/66Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F16H61/66259Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9080671B2 cover?
- A first determining unit configured to determine whether the indicated pressure of a primary pulley pressure has become a line pressure during an up shift, an indicated pressure control unit configured to make the indicated pressure of the primary pulley pressure alone higher than the line pressure when the target shift rate is determined to be equal to or lower than a predetermined shift rate …
- Who is the assignee on this patent?
- Jatco Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H61/66. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 14 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).