Eaton Corporation

Eaton Intelligent Power Limited

Michael J Hornbrook

Yeidei Wang

John A Schenkel

Mark Charles Barnholt

Steven E McCutcheon

Brian William Franke

Mark L Beakas

John A Schenkel, Iii

Michael J Warwick

A dual clutch assembly comprises a rotatable second input shaft that surrounds and is concentric with a rotatable first input shaft. A rotatable hub surrounds the first input shaft. A first and a second clutch rotor are connected to the rotatable hub. The first clutch rotor comprises a pulley coupling and a clutch surface. The second clutch rotor comprises a clutch surface. A stationary electromagnetic assembly is mounted between the first clutch rotor and the second clutch rotor. A first armature assembly is coupled to the first input shaft and is configured to couple to the first clutch surface of the first clutch rotor in response to a first electromagnetic signal. A second armature assembly is coupled to the second input shaft and is configured to couple to the clutch surface of the second clutch rotor in response to a second electromagnetic signal.

Dual clutch assembly with neutral function and transmission assembly

An electromagnetic clutch assembly includes a rotor assembly operable to rotate about an axis. The electromagnetic clutch assembly also includes an armature assembly operable to rotate about the axis. The electromagnetic clutch assembly also includes an electromagnetic coupling system operable to generate a magnetic field. The magnetic field induces the rotor assembly and the armature assembly against one another along the axis for frictional engagement such that the rotor assembly and the armature assembly rotate together. The electromagnetic clutch assembly also includes an air gap defined between the rotor assembly and the armature assembly when the rotor assembly and the armature assembly are in frictional engagement. In another implementation, at least one plate is positioned between the rotor assembly and the armature assembly such that magnetic flux passes through the at least one plate. The plate is formed from a mixture of powdered metal and solid lubricant.

Electromagnetic clutch assembly

An electromagnetic inertia brake for a vehicle transmission in a vehicle powertrain has a non-rotatable armature and a brake reaction plate in which a friction brake retarding force is developed on both sides of the brake reaction plate, the brake reaction plate being secured to a transmission torque input shaft, whereby rotary elements of transmission gearing are braked during a transmission shift interval to improve shift quality.

Electromagnetic inertia brake for a multiple-ratio power transmission

A control system and method for an electromagnetic clutch brake, including an electromagnetic clutch brake actuator coil surrounding a power input shaft for a multiple-ratio transmission in a vehicle powertrain. A protective circuit of the control system normally monitors data inputs from a databus that may indicate conditions that are not favorable for clutch brake actuation. The protective circuit prevents actuation of the clutch brake under such conditions. In the event the data inputs are not available from the databus, the protective circuit permits operation in a fall-back mode in which a brake ON timer is checked prior to clutch brake actuation. A primary counter is incremented with each normal clutch brake actuation and a secondary counter is incremented with each fall-back clutch brake actuation.

Control for an electromagnetic brake for a multiple-ratio power transmission that has a brake actuation counter

A control system and method is disclosed for an electromagnetic clutch brake, including an electromagnetic clutch brake actuator coil surrounding a power input shaft for a multiple-ratio transmission in a vehicle powertrain. A protective circuit of the control system normally monitors data inputs that indicate conditions that are not favorable for clutch brake actuation. The protective circuit prevents actuation of the clutch brake under such conditions. The protective circuit may monitor a plurality of signals including a vehicle speed signal which prevents engagement of the clutch brake unless the vehicle speed is below a predetermined level. The system may further include a transmission neutral switch that permits bypassing monitoring the vehicle speed signal when the transmission neutral switch is actuated.

Control for an electromagnetic brake for a multiple-ratio power transmission that has a neutral switch for power take-off engagement

An electromagnetic brake for an input shaft of a vehicle transmission is disclosed. The brake includes an armature separated from an electromagnetic coil pole face by a controlled air gap. A spring release feature ensures precise armature disengagement when the brake is deactivated. A wear compensation feature maintains uniformity of the air gap.

Electromagnetic inertia brake for a power input shaft of a power transmission mechanism

A control system for an electromagnetic brake, including an electromagnetic brake actuator coil surrounding a power input shaft for a multiple-ratio transmission in a vehicle powertrain. An electromagnetic flux flow path for the actuator coil is electromagnetically isolated from the power input shaft and other elements of the powertrain thereby avoiding residual magnetization. A thermally responsive circuit protector is provided in the coil circuit that senses the temperature of the stator coil to avoid overheating of the stator coil. An overcurrent protector is provided for opening the stator coil circuit when current in the stator coil exceeds a predetermined value.

Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain

An electromagnetic brake, including an electromagnetic brake actuator coil surrounding a power input shaft for a multiple-ratio transmission in a vehicle powertrain, is disclosed. An electromagnetic flux flow path for the actuator coil is electromagnetically isolated from the power input shaft and other elements of the powertrain thereby avoiding residual magnetization.

Electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain

A clutch assembly having a master cylinder that includes non-contacting position switches is disclosed. The master cylinder controls a slave cylinder that shifts the release bearing of the clutch system. A cruise control interrupt switch and an ignition system interlock switch are disclosed. The switches may be Hall effect or other non-contacting switches.

Master cylinder position switch

A clutch brake is provided that includes a brake housing adapted to be non-movably secured relative to a driveline master clutch. The brake housing includes a through-hole sized to allow passage of a shaft and at least one source of magnetic flux. The clutch brake also includes an armature secured for rotation with the shaft and positioned axially adjacent the brake housing in a disengaged state. At least a portion of the armature is adapted to move axially on the shaft in the presence of magnetic flux to contact the brake housing in an engaged state and inhibit rotation of the armature and the shaft.

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Orland, IN, United States of America

Michael J Hornbrook