Control apparatus for vehicular continuously variable transmission
US-2017254412-A1 · Sep 7, 2017 · US
Abnormality determination device for continuously variable transmission
US10041583B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10041583-B2 |
| Application number | US-201515515779-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 25, 2015 |
| Priority date | Oct 15, 2014 |
| Publication date | Aug 7, 2018 |
| Grant date | Aug 7, 2018 |
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- Title
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Abstract
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An abnormality determination device for a continuously variable transmission is provided in which since the abnormality determination device which calculates a compression stiffness of a metal belt from an amplitude ratio between a variable component of the rotational speed of an input shaft and a variable component of the rotational speed of an output shaft, a phase lag that is an indicator of the difference in phase between a variable component of the rotational speed of the input shaft and a variable component of the rotational speed of the output shaft, and a belt pitch radius of a drive pulley or a driven pulley, and determines whether a metal ring has broken by comparing the compression stiffness of the metal belt with a preset reference compression stiffness.
First claim
Opening claim text (preview).
The invention claimed is: 1. An abnormality determination device for a continuously variable transmission, comprising: an input shaft to which a driving force of a drive source is inputted, a drive pulley that is provided on the input shaft, an output shaft via which the driving force of the drive source is changed in speed and outputted, a driven pulley that is provided on the output shaft, a metal belt that is formed by supporting a plurality of metal elements on an endless metal ring and that transmits the driving force from the input shaft to the output shaft by being compressed on the drive pulley and the driven pulley respectively, and abnormality determination device that determines that the metal ring has broken, wherein the abnormality determination device calculates a compression stiffness of the metal belt from an amplitude ratio between a variable component of a rotational speed of the input shaft and another variable component of the rotational speed of the output shaft, a phase lag that is an indicator of a difference in phase between the variable component of the rotational speed of the input shaft and the another variable component of a rotational speed of the output shaft, and a belt pitch radius of the drive pulley or the driven pulley, and determines that the metal ring has broken by comparing the compression stiffness of the metal belt with a preset reference compression stiffness. 2. The abnormality determination device for the continuously variable transmission according to claim 1 , wherein the reference compression stiffness is obtained by normalizing an inter-metal element pushing force with a metal ring tension. 3. The abnormality determination device for the continuously variable transmission according to claim 1 , being further configured to at least one of decreasing the outputted drive force of the drive source, decreasing a vehicle speed, and decreasing pulley thrusts of the drive pulley and the driven pulley when the abnormality determination device determines that the metal ring has broken. 4. The abnormality determination device for the continuously variable transmission according to claim 2 , being configured to at least one of decreasing the outputted drive force of the drive source, decreasing a vehicle speed, and decreasing pulley thrusts of the drive pulley and the driven pulley when the abnormality determination device determines that the metal ring has broken.
Assignees
Inventors
Classifications
Detection of slip for determining level of wear · CPC title
with diagnostic check cycles; Monitoring of failures · CPC title
Input shaft speed · CPC title
Limiting the input power, torque or speed · CPC title
Transmission output torque, e.g. measured or estimated torque at output drive shaft · CPC title
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- What does patent US10041583B2 cover?
- An abnormality determination device for a continuously variable transmission is provided in which since the abnormality determination device which calculates a compression stiffness of a metal belt from an amplitude ratio between a variable component of the rotational speed of an input shaft and a variable component of the rotational speed of an output shaft, a phase lag that is an indicator of…
- Who is the assignee on this patent?
- Honda Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F16H59/141. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 07 2018 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).