Ford Global Technolgoies, LLC

Link Engineering Company

Ted Duane Snyder

Yuji Fujii

Gregory Michael Pietron

William Emil Tobler

Seung-Hoon Lee

James William Loch McCallum

Jau-Wen Tseng

Mohamed Redissi

David Popejoy

Marvin Paul Kraska

Robert Orley Burkhart

Anthony J Grzesiak

Christopher Charles Denault

A load sensor assembly for measuring an amount of torque transmitted through a torque establishing element includes a core mounted on a transmission housing and a load sensor mounted on the core. The load sensor is positioned against a portion of the torque establishing element whereby a portion of the amount of torque transmitted through the torque establishing element travels through the load sensor and is measured. A cable is connected to the load sensor for transmitting a signal representative of the amount of torque to a transmission controller.

Friction element load sensing in an automatic transmission

An actuator system includes a piezoelectric pump; an accumulator including a cylinder, a piston located in the cylinder, a port located at a first side of the piston and hydraulically connected to the pump outlet and a switching circuit, a relief port hydraulically connected to the reservoir and located at a second side of the piston, and a spring biasing the piston toward the port; and a hydraulically actuated servo including a front port hydraulically connected to the switching circuit, a back port hydraulically connected to the reservoir, and the servo causing the friction element alternately to engage and to disengage in response to a magnitude of hydraulic pressure in the servo.

Hydraulic actuator for a vehicular power train

A method of testing a friction component for a transmission that has first and second parts. The first part of the friction component is attached to a drive shaft and the second part is attached to a grounding element. The first part of the friction component is rotated until the drive shaft and the first part of the friction component rotate at a target sliding speed V. An actuation force is applied to the friction component at a time t. Operation of the motor drive is continued to maintain the speed of rotation of the drive shaft at Vuntil a predetermined level of engagement torque Tis obtained. The motor torque is then reduced to a predetermined level T. The sliding speed of the drive shaft is then decreased and the test is terminated when the sliding speed falls to zero.

Method of testing friction components for automatic transmissions

A band brake drum assembly ( ) is provided and includes a brake band member ( ), a generally round and/or cylindrical and brake drum ( ) which is disposed concentric to band ( ), and an input or hub shaft ( which is fixedly coupled to and rotatably drives drum ( ). Drum includes an interior surface having a recessed portion ( ) which is effective to retain a certain amount of lubricant or oil within the drum, and several relatively large drainage holes ( ) which are effective to quickly drain excess lubricant from drum ( ), thereby providing a consistent amount of lubricant wit in drum ( ) and improving the overall performance of the brake band assembly.

Band brake assembly

A method for controlling ratio changes in a swap-shift transmission having a first simple planetary gear unit and a second compound planetary gear unit, the two gear units being arranged in series disposition, pressure-operated friction elements for separately braking the reaction member at each of the gear units to establish a change in ratio. The change in ratio consists of a downshift by releasing a reaction friction element for the first gear unit and upshifting the second gear unit by applying a second friction element to anchor a reaction member of the second gear unit in a non-synchronous fashion to achieve a consistent shift quality without precise matching of friction element application and release whereby inertia torque disturbances in the torque output elements of the transmission are avoided.

Strategy for controlling ratio changes in a swap-shift automatic transmission

Growing community of inventors

Brighton, MI, United States of America

Ted Duane Snyder