Controller and control method of belt-type continuously variable transmission
US-9212742-B2 · Dec 15, 2015 · US
Torque ratio estimating apparatus for continuously variable transmission and lateral pressure control apparatus for continuously variable transmission
US8977447B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8977447-B2 |
| Application number | US-201013576367-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 18, 2010 |
| Priority date | Feb 26, 2010 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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When estimating a torque ratio, which is the ratio of an actually transmitted torque relative to the maximum transmittable torque of a continuously variable transmission, based on the transmission characteristics for transmitting a given variable component of an input shaft element to an output shaft element via a frictional element, since the torque ratio is estimated from a slip identifier, an indicator for difference in amplitude of a variable component between the two elements, or a phase lag, an indicator for difference in phase of the variable component between the two elements, it is possible to estimate the torque ratio, which is closely related to the power transmission efficiency of the continuously variable transmission, with good precision, thus improving the power transmission efficiency. Moreover, since the torque ratio is estimated from the slip identifier or the phase lag, it is possible to minimize the number of sensors necessary for estimation.
First claim
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The invention claimed is: 1. A lateral pressure control apparatus for a continuously variable transmission, comprising: an input shaft element to which the driving force of a drive source is inputted, an output shaft element via which the driving force of the drive source is changed in speed and outputted, a transmission element that is in contact with each of the input and output shaft elements and transmits the driving force from the input shaft element to the output shaft e…
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Mechanical Engineering · mapped topic
- F16H61/66272Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8977447B2 cover?
- When estimating a torque ratio, which is the ratio of an actually transmitted torque relative to the maximum transmittable torque of a continuously variable transmission, based on the transmission characteristics for transmitting a given variable component of an input shaft element to an output shaft element via a frictional element, since the torque ratio is estimated from a slip identifier, a…
- Who is the assignee on this patent?
- Sakagami Kyohei, Honda Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H61/66272. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 10 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).