Ford Global Technolgoies, LLC

Steven Craig Meisner

Bradley Dean Riedle

David Karl Bidner

Hong Jiang

Matthew John Shelton

Richard Reynolds Hathaway

Jeffrey James Tumavitch

Pramod Kumar Jain

Joseph Scott Slayton

Ralph S Walker

Shawn Adam Holland

Edward Katynski

George Herr

Balaram G Sankpal

Steven Laile Pearce

Armand Giannamore

A system and method for controlling a vehicle include a manual transmission operated by a controller in communication with shift actuators and programmed to, in response to each controller reset less than a threshold number of resets, control each shift actuator that was not moving at the time of the reset based on respective shift actuator positions stored prior to the reset, and to control the shift actuators to limit available gear ratios in response to the reset exceeding the threshold number of resets.

Vehicle transmission control module reset detection and mitigation

A method for controlling a power-off downshift in a powershift transmission includes disengaging the current gear, synchronizing engine speed and a speed of the target gear layshaft by increasing a torque capacity of the target gear clutch, disengaging the clutch, engaging the target gear, and reengaging the clutch.

Power-off downshift engagement dampening

An automatic transmission ratio shift control system and method for a powertrain having an engine and multiple-ratio gearing controlled by friction elements actuated by hydraulic pressure, an electronic controller for establishing torque transitions among the friction elements as the gear ratio changes, the engine speed being controlled by an electronic throttle control. The strategy employs an electronic throttle and closed loop engine speed control and uses fuel and air as an energy source to increase engine speed during a power-off downshift. The engine speed is boosted to a level close to the synchronous speed in conjunction with release of the off-going friction element. The on-coming friction element is then applied as the engine speed approaches a desired speed. The engine speed increase is timed to lead an increase in torque converter speed.

Coasting downshift control for automatic transmissions

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Dexter, MI, United States of America

Steven Craig Meisner