Transmission actuation system
AssigneeLuK Lamellen und Kupplungsbau Beteiligungs KG
InventorsTrevor McConnell, Jeffrey Hemphill, Philip George
Life of this patent
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Abstract
A transmission system without dynamic seals, specifically, an actuator for a vehicle transmission including a first rotating clutch pack engageable with a planetary gearset a first non-rotating actuator piston for engaging the clutch pack and a first bearing for isolating a first rotation of the clutch pack from the piston. A transmission system is provided using an electromechanical system for shifting the clutches, allowing a smaller pump only for lubrication of the transmission and the torque converter flow.
Claims30
An actuator for a vehicle transmission comprising:
- a first rotating clutch pack engageable with a planetary gearset;
- a first non-rotating actuator piston for engaging the clutch pack;
- and
- a first bearing for isolating a first rotation of the clutch pack from the piston.
A transmission comprising:
- at least one gear;
- at least one rotating clutch pack engageable with the gear;
- a gear actuator comprising at least one non-rotating actuator piston;
- and
- at least one bearing for isolating rotation of the clutch pack from the piston, wherein the gear is axially disposed between the actuator and an engine drivingly engaged with the transmission.
An actuator comprising:
- a first electric motor,
- a hydraulic cylinder, and
- a channel comprising a check valve for maintaining pressure in the channel, and
- a selector valve, wherein the motor is arranged to displace the cylinder and operate the selector valve to selectively pressurize the channel.
A transmission for a vehicle comprising:
- at least one gear;
- at least one brake;
- and
- at least one clutch, wherein the brake and clutch are actuated via individual pressure channels, the channels each comprising a check valve for maintaining pressure in the channels.
Dependencies are inferred from the claim text.