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US 9,670,997 B2Granted
Continuously variable transmission
AssigneeJATCO Ltd
InventorHiroshi Tange
Life of this patent
Estimating the term…
Abstract
A continuously variable transmission including: a pair of pressing means that form a torque transmission contact portion in a disk overlapping area where the input disk and the output disk are overlapped; target slip rate setting means that is configured to set a target slip rate between the input disk and the output disk in the torque transmission contact portion to a value higher than a torque transmission start slip rate in the torque transmission contact portion; and control means that is configured to control a force for clamping and pressing both the disks using the pressing means such that an actual slip rate in the torque transmission contact portion becomes the target slip rate.
Claims9
A continuously variable transmission comprising:
- an input shaft connected to a motor and supported by a transmission unit casing member;
- an output shaft arranged in parallel with the input shaft and supported by the transmission unit casing member;
- a discoidal input disk that is provided in the input shaft and has an outer circumferential edge arranged close to the output shaft;
- a discoidal output disk that is provided in the output shaft and has an outer circumferential edge arranged close to the input shaft;
- a pair of pressing units provided movably along a shaft center connecting line obtained by connecting a shaft center of the input shaft and a shaft center of the output shaft in a disk overlapping area where the input disk and the output disk are overlapped, so that a torque transmission contact portion is formed by clamping and pressing both the disks in a position corresponding to a target shift ratio to elastically deform both the disks;
- a target slip rate setting unit that is configured to set a target slip rate between the input disk and the output disk in the torque transmission contact portion to a value higher than a torque transmission start slip rate in the torque transmission contact portion;
- and
- a control unit that is configured to control a force for clamping and pressing both the disks using the pressing units such that an actual slip rate in the torque transmission contact portion becomes the target slip rate.
5 more elements
A control method for continuously variable transmission having:
- an input shaft connected to a motor and supported by a transmission unit casing member;
- an output shaft arranged in parallel with the input shaft and supported by the transmission unit casing member;
- a discoidal input disk that is provided in the input shaft and has an outer circumferential edge arranged close to the output shaft;
- a discoidal output disk that is provided in the output shaft and has an outer circumferential edge arranged close to the input shaft;
- and
- a pair of pressing units provided movably along a shaft center connecting line obtained by connecting a shaft center of the input shaft and a shaft center of the output shaft in a disk overlapping area where the input disk and the output disk are overlapped, so that a torque transmission contact portion is formed by clamping and pressing both the disks in a position corresponding to a target shift ratio to elastically deform both the disks,
- the control method comprising:
- setting a target slip rate between the input disk and the output disk in the torque transmission contact portion to a value higher than a torque transmission start slip rate in the torque transmission contact portion;
- and
- controlling a force for clamping and pressing both the disks using the pressing units such that an actual slip rate in the torque transmission contact portion becomes the target slip rate.
7 more elements
A continuously variable transmission comprising:
- an input shaft connected to a motor and supported by a transmission unit casing member;
- an output shaft arranged in parallel with the input shaft and supported by the transmission unit casing member;
- a discoidal input disk that is provided in the input shaft and has an outer circumferential edge arranged close to the output shaft;
- a discoidal output disk that is provided in the output shaft and has an outer circumferential edge arranged close to the input shaft;
- a pair of pressing units provided movably along a shaft center connecting line obtained by connecting a shaft center of the input shaft and a shaft center of the output shaft in a disk overlapping area where the input disk and the output disk are overlapped, so that a torque transmission contact portion is formed by clamping and pressing both the disks in a position corresponding to a target shift ratio to elastically deform both the disks;
- target slip rate setting means for setting a target slip rate between the input disk and the output disk in the torque transmission contact portion to a value higher than a torque transmission start slip rate in the torque transmission contact portion;
- and
- control means for controlling a force for clamping and pressing both the disks using the pressing unit such that an actual slip rate in the torque transmission contact portion becomes the target slip rate.
5 more elements
Dependencies are inferred from the claim text.