Shifting system for vehicle transmission and method of operating the same

Patent metadata

Field	Value
Publication number	US-11215242-B2
Application number	US-202017116239-A
Country	US
Kind code	B2
Filing date	Dec 9, 2020
Priority date	Dec 10, 2019
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A shifting system for a vehicle transmission includes an input member and a selectable one-way clutch rotatably coupled to the input member. The selectable one-way clutch is moveable between first, second, and third clutch positions. The shifting system also includes a disconnect coupled to the input member and moveable between first and second disconnect positions, and an output member selectively rotatable with the input member. The shifting system further includes a shifting assembly for selectively rotatably coupling the input and output members. The shifting assembly includes an input hub coupled to the input member, having a disconnectable component engageable with the disconnect, and having a clutch engagement component. Clutch plates are coupled to the clutch engagement component and are moveable between engaged and disengaged positions. A clutch plate carrier is coupled to the clutch plates and output member to transmit torque from the clutch engagement component to the output member.

First claim

What is claimed is:

1. A shifting system for a vehicle transmission having a gearset comprising a first gear ratio and a second gear ratio different from the first gear ratio, the shifting system comprising;
an input member extending along an axis between a first end and a second end spaced from the first end, with said input member rotatable about said axis;
a selectable one-way clutch rotatably coupled to said input member, with said selectable one-way clutch moveable between,
a first clutch position where said selectable one-way clutch is configured to allow torque to be transmitted through one of the first and second gear ratios of the gearset from said input member in either a first rotational direction or a second rotational direction opposite said first rotational direction;
a second clutch position where said selectable one-way clutch is configured to allow torque to be transmitted through one of the first and second gear ratios of the gearset from said input member in said first rotational direction and prevent torque from being transmitted through one of the first and second gear ratios of the gearset from said input member in said second rotational direction; and
a third clutch position where said selectable one-way clutch is configured to prevent torque from being transmitted through one of the first and second gear ratios of the gearset from said input member in either said first rotational direction or said second rotational direction;

a disconnect coupled to said input member and moveable between a first disconnect position and a second disconnect position;
an output member spaced from said input member, said output member selectively rotatable with said input member about said axis to selectively transmit torque through the other of the first and second gear ratios of the gearset; and
a shifting assembly for selectively rotatably coupling said input member and said output member, said shifting assembly comprising;
an input hub coupled to said input member, with said input hub having a disconnectable component engageable with said disconnect, where said disconnectable component of said input hub is disengaged from said disconnect when said disconnect is in said first disconnect position and where said disconnectable component of said input hub is engaged with said disconnect when said disconnect is in said second disconnect position, and with said input hub having a clutch engagement component;
a plurality of clutch plates coupled to said clutch engagement component of said input hub, with said plurality of clutch plates moveable between an engaged position where said clutch plates are engaged with one another, and a disengaged position where said clutch plates are disengaged from one another; and
a clutch plate carrier coupled to said plurality of clutch plates and to said output member to transmit torque from said clutch engagement component of said input hub through said plurality of clutch plates and said clutch plate carrier to said output member.

2. The shifting system as set forth in claim 1 , wherein said selectable one-way clutch has an inner race and an outer race disposed about said inner race.

3. The shifting system as set forth in claim 2 , wherein said inner and outer races of said selectable one-way clutch are disposed about and aligned axially with said input member.

4. The shifting system as set forth in claim 2 , wherein said inner race of said selectable one-way clutch is rotatably coupled with said input member.

5. The shifting system as set forth in claim 1 , wherein said selectable one-way clutch has at least one pawl disposed between said inner race and said outer race.

6. The shifting system as set forth in claim 5 , wherein said at least one pawl is further defined as a plurality of pawls circumferentially spaced from one another, and wherein said selectable one-way clutch further comprises an actuator ring coupled to said plurality of pawls for selectively rotatably locking the inner and outer races together.

7. The shifting system as set forth in claim 1 , wherein said shifting assembly further comprises a biasing member coupled to said plurality of clutch plates to bias said plurality of clutch plates toward said engaged position.

8. The shifting system as set forth in claim 1 , wherein said selectable one-way clutch is further moveable to a fourth position where said selectable one-way clutch is configured to allow torque to be transmitted through one of the first and second gear ratios of the gearset from said input member in said second rotational direction and prevent torque from being transmitted through one of the first and second gear ratios of the gearset from said input member in said first rotational direction.

9. A vehicle transmission comprising;
a gearset comprising a first gear ratio and a second gear ratio different from said first gear ratio;
an input member extending along an axis between a first end and a second end spaced from the first end, with said input member rotatable about said axis;
a selectable one-way clutch rotatably coupled to said input member and configured to allow torque to be transmitted through one of said first and second gear ratios of said gearset, with said selectable one-way clutch moveable between,
a first clutch position where said selectable one-way clutch is configured to allow torque to be transmitted through one of said first and second gear ratios of said gearset from said input member in either a first rotational direction or a second rotational direction opposite said first rotational direction;
a second clutch position where said selectable one-way clutch is configured to allow torque to be transmitted through one of said first and second gear ratios of said gearset from said input member in said first rotational direction and prevent torque from being transmitted through one of said first and second gear ratios of said gearset from said input member in said second rotational direction; and
a third clutch position where said selectable one-way clutch is configured to prevent torque from being transmitted through one of said first and second gear ratios of said gearset from said input member in either said first rotational direction or said second rotational direction;

a disconnect coupled to said input member and moveable between a first disconnect position and a second disconnect position;
an output member spaced from said input member, said output member selectively rotatable with said input member about said axis to selectively transmit torque through the other of said first and second gear ratios of said gearset; and
a shifting assembly to selectively rotatably couple said input member and said output member, said shifting assembly comprising;
an input hub coupled to said input member, with said input hub having a disconnectable component engageable with said disconnect, where said disconnectable component of said input hub is disengaged from said disconnect when said disconnect is in said first disconnect position and where said disconnectable component of said input hub is engaged with said disconnect when said disconnect is in said second disconnect position, and with said input hub having a clutch engagement component;
a plurality of clutch plates coupled to said clutch engagement component of said input hub, with said plurality of clutch plates moveable between an engaged position where said clutch plates are engaged with one another, and a disengaged position where said plurality of clutch plates are disengaged from one another; and
a clutch plate carrier coupled to said plurality of clutch plates and to said output member to transmit torque from said clutch engagement component of said input hub through said plurality o

Assignees

• Borgwarner Inc

Inventors

• Campton Calahan B
• Martin R Keith

Classifications

• F16H59/02

  Selector apparatus · CPC title

• F16D41/16

  the action being reversible · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title

• F16D41/082

  the intermediate coupling members wedging by movement other than pivoting or rolling · CPC title

• F16H57/023

  Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly · CPC title