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US 2019/0162245 A1Published application
Method for controlling electromagnetic wedge clutch
AssigneeSchaeffler Technologies AG & Co. KG
InventorsNicholas HRUSCH, Larry HAINES
Life of this patent
Estimating the term…
Abstract
A transmission control unit for a wedge clutch, comprising a controller configured to send one or more signals to a switch connected to the wedge clutch, the switch being configured to demagnetize the wedge clutch by sending current in a first direction to a coil of the wedge clutch.
Claims20
An electric circuit for a wedge clutch, comprising:
- a clutch coil configured to magnetize or demagnetize based on a direction of current received at the clutch coil;
- a power relay configured to transfer current to the clutch coil;
- a controller;
- and
- a H-bridge connected to the controller and the wedge clutch coil, wherein the controller is configured to:
- send a first signal configured to send current through the power relay and the H-bridge to the clutch coil in a first direction to magnetize the clutch coil;
- and
- send a second signal configured to send current through the power relay and the H-bridge to the clutch coil in a second direction to demagnetize the clutch coil.
5 more elements
A wedge clutch comprising:
- an inner race;
- an outer race;
- a disk configured to radially expand and contract to selectively lock and unlock the inner race to the outer race, wherein the disk has a first end and a second end that cooperate to define a gap therebetween;
- and
- electromagnetic coils integrated into the disk that, when activated, pull the first end toward the second end to constrict the disk and alter the wedge clutch between locked and unlocked, wherein the electromagnetic coils are configured to activate and deactivate in response to a microcontroller configured to generate current to the wedge clutch in a first direction and a second direction.
2 more elements
A transmission control unit for a wedge clutch, comprising:
- a controller configured to send one or more signals to a switch connected to the wedge clutch, the switch being configured to demagnetize the wedge clutch by sending current in a first direction to a coil of the wedge clutch.
Dependencies are inferred from the claim text.