# US 8,771,116 B2 · Vehicle transmission having continuously variable gear ratios

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- Number: US 8,771,116 B2
- Document ID: US8771116B2
- Status: Granted
- Kind: B2
- Application number: 12/737,211
- Filed: 2009-05-28
- Published: 2011-06-30
- Granted: 2014-07-08
- Earliest claimed: 2008-06-17
- Assignees: Schaeffler Technologies AG & Co. KG
- Applicants: Andreas Triller
- Inventors: Andreas Triller
- Web page: https://patentgrep.com/patent/US8771116B2

## CPC

- F16H 37/021: {toothed gearing combined with continuously variable friction gearing}
- F16H 2037/023: {the combined gearing being provided with at least two forward and one reverse ratio in a serially arranged sub-transmission}
- F16H 2037/025: {having continuously variable friction gearing, i.e. CVT, in which the ratio coverage is used more than once to produce the overall transmission ratio coverage, e.g. by shift to end of range, then change ratio in sub-transmission and shift CVT through range once again}
- F16H: GEARING

## Abstract

A vehicle transmission having continuously variable transmission ratios including an input shaft and an intermediate shaft. A first conical disk pair is disposed on a first shaft and a second conical disk pair is disposed on a second shaft. A belt connects the disk pairs. An intermediate gear that can be rotatably engaged with the first shaft, and an output gear, are rotatably supported on the intermediate shaft. A connecting gear is non-rotatably disposed on the intermediate shaft. A first force transmitting device is disposed between the input shaft and intermediate shaft, a second force transmitting device is disposed between the input shaft and the intermediate gear, a third force transmitting device is disposed between the intermediate gear and output gear, and a fourth force transmitting device is disposed between the intermediate shaft and the output gear. At least one of the force transmitting devices is a freewheel.

## Claims

### Claim 1

A vehicle transmission having continuously variable transmission ratios, said transmission comprising: a first conical disk pair disposed on a first shaft and a second conical disk pair disposed on a second shaft, a belt means disposed between and interconnecting the conical disk pairs, an input shaft and an intermediate shaft, wherein the input shaft and the intermediate shaft are coaxially arranged for rotation about respective coaxial axes of rotation, an intermediate gear is rotatably supported on the intermediate shaft and is engageable with a gear that is non-rotatably carried by the first shaft, an output gear is rotatably supported on the intermediate shaft and is axially spaced along the intermediate shaft from the intermediate gear, a connecting gear is non-rotatably disposed on the intermediate shaft, a first torque transmission device is disposed between the input shaft and the intermediate shaft, a second torque transmission device is disposed between the input shaft and the intermediate gear, a third torque transmission device is disposed between the intermediate gear and the output gear, and a fourth torque transmission device is disposed between the intermediate shaft and the output gear, wherein each of the torque transmission devices is disposed coaxially with the axis of rotation of the intermediate shaft, and wherein at least one of the torque transmission devices is a freewheel.

### Claim 2 (depends on 1)

The vehicle transmission according to claim 1, wherein the first and the second torque transmission devices are clutches, and the third and fourth torque transmission devices are freewheels.

### Claim 3 (depends on 1)

The vehicle transmission according to claim 1, wherein the first and fourth torque transmission devices are freewheels and the second and third torque transmission devices are clutches.

### Claim 4 (depends on 1)

The vehicle transmission according to claim 1, wherein the first and second torque transmission devices are freewheels, and the third and fourth torque transmission devices are clutches.

### Claim 5 (depends on 1)

The vehicle transmission according to claim 1, including a gear rotatably supported on the second shaft and operatively engageable with the output gear in torque transmission engagement by a reverse drive clutch.

### Claim 6 (depends on 1)

The vehicle transmission according to claim 1, including a gear non-rotatably connected with the second shaft and in rotational engagement with the connecting gear.