Clutch system

Patent metadata

Field	Value
Publication number	US-10458491-B2
Application number	US-201615567052-A
Country	US
Kind code	B2
Filing date	Apr 14, 2016
Priority date	Apr 17, 2015
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A clutch system includes a friction clutch, a ramp system, a pilot clutch, and an actuation element. The friction clutch is for transmitting torque between a torque-introducing element and a torque discharging element. The friction clutch includes a pressure plate. The system is for axially moving the pressure plate. The ramp system has an input ramp and an output ramp. The output ramp is rotatable relative to the input ramp to change an axial extent of the ramp system. The pilot clutch is for initiating rotation of the input ramp relative to the output ramp in response to a speed differential between the torque-introducing element and the torque-discharging element. The actuation element is arranged radially on the inside relative to the friction clutch and is at least partially covered by the friction clutch when viewed in a radial direction.

First claim

The invention claimed is:

1. A clutch system comprising:
a fixed housing;
a friction clutch for transmitting torque between a torque-introducing element and a torque-discharging element and comprising a pressure plate;
a ramp system for axially moving the pressure plate, comprising:
an input ramp; and,
an output ramp rotatable relative to the input ramp to change an axial extent of the ramp system;

a pilot clutch for initiating rotation of the input ramp relative to the output ramp in response to a speed differential between the torque-introducing element and the torque-discharging element; and,
an actuation element arranged radially on the inside relative to the friction clutch and at least partially covered by the friction clutch when viewed in a radial direction, wherein the actuation element comprises a coil housing connected for conjoint rotation to the fixed housing.

2. The clutch system of claim 1 wherein:
the friction clutch is a multiplate clutch;
the torque-introducing element is a drive shaft of a motor vehicle engine; and,
the torque-discharging element is an input shaft of a motor vehicle transmission.

3. The clutch system of claim 1 wherein the actuation element is for magnetically actuating the pilot clutch.

4. The clutch system of claim 1 wherein the actuation element is entirely covered by the friction clutch when viewed in the radial direction.

5. The clutch system of claim 1 further comprising:
a bearing arranged radially on an inside of the actuation element and at least partially covered by the friction clutch or the actuation element when viewed in the radial direction; and,
an output element supported on the torque-introducing element by the bearing.

6. The clutch system of claim 1 further comprising:
a bearing arranged radially on an inside of the actuation element and at least partially covered by the friction clutch or the actuation element when viewed in the radial direction; and,
an output element supported on the fixed housing by the bearing.

7. The clutch system of claim 1 wherein the actuation element comprises an actuation coil through which a current can flow, the actuation coil being at least partially covered by the friction clutch when viewed in the radial direction.

8. The clutch system of claim 7 wherein the coil housing is configured for receiving and/or magnetically shielding the actuation coil, the coil housing being open toward the pilot clutch.

9. The clutch system of claim 1 wherein:
the friction clutch comprises an output element arranged as an output plate carrier; and,
the coil housing is connected for conjoint rotation to the output element.

10. The clutch system of claim 1 wherein:
the friction clutch comprises an input element arranged as an input plate carrier; and,
the coil housing is connected for conjoint rotation to the input element.

11. The clutch system of claim 1 wherein the actuation element can be actuated wirelessly.

12. The clutch system of claim 11 wherein the actuation element can be actuated inductively.

13. The clutch system of claim 11 wherein:
the pilot clutch comprises a friction element coupled to the torque-discharging element;
the friction clutch comprises an input element coupled to the torque-introducing element; and,
the pilot clutch is arranged to close when the friction element contacts the input element.

14. The clutch system of claim 13 wherein the input element of the friction clutch is an input plate carrier.

15. A powertrain for a motor vehicle comprising:
the clutch system of claim 14 ;
the torque-introducing element;
the torque discharging element; and, an electric machine for transmitting a torque to the torque-discharging element.

16. The powertrain of claim 15 wherein:
the torque-introducing element is a drive shaft of a motor vehicle engine; and,
the torque-discharging element is a transmission input shaft of a motor vehicle transmission.

17. The clutch system of claim 1 further comprising a freewheel connected in parallel with the friction clutch, wherein the freewheel is arranged to:
transmit a torque from the torque-introducing element to the torque-discharging element; and,
interrupt a torque flow from the torque-discharging element to the torque-introducing element.

18. A powertrain for a motor vehicle comprising:
the clutch system of claim 1 ;
the torque-introducing element;
the torque discharging element; and,
an electric machine for transmitting a torque to the torque-discharging element.

19. The powertrain of claim 18 wherein:
the torque-introducing element is a drive shaft of a motor vehicle engine; and,
the torque-discharging element is a transmission input shaft of a motor vehicle transmission.

Assignees

• Schaeffler Technologies Ag

Inventors

• Trinkenschuh Andreas
• Reitz Dierk

Classifications

• F16D47/04 Primary

  of which at least one is a freewheel (F16D47/02, F16D47/06 take precedence; freewheels combined with a clutch to lock the driving and driven members of the freewheel F16D41/04, F16D41/26) · CPC title

• F16D27/04

  with axially-movable friction surfaces · CPC title

• F16D41/04

  combined with a clutch for locking the driving and driven members (F16D41/02, F16D41/24 take precedence) · CPC title

• F16D13/52

  Clutches with multiple lamellae {; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member (F16D13/385 takes precedence)} · CPC title

• F16D27/08

  with friction surfaces arranged externally to the flux · CPC title