Gm Global Technolgoy Operations, Inc.

Henry R Wright

Crystal Nassouri

Brandon M Fell

Andrew M Zettel

Mateusz M Nowak

Martin Gentile

Gurhari Singh

Julian Heinz

Rainer Kloesel

Rakesh Mohanty

Falko Hendrischke

Marcel Wachtel

A method for controlling a transmission of a vehicle includes: determining, via an electronic controller, a predicted lateral G-force that will act on the vehicle while the vehicle moves along a road curve using image data from a front camera of the vehicle before the vehicle moves along the road curve; communicating, via the electronic controller, the predicted lateral G-force to a transmission controller; and and controlling, via the transmission controller, the transmission of the vehicle based on the predicted lateral G-force.

Method and vehicle utilizing predictive road curvature in the transmission control module

A method of adjusting deceleration dependent shift points to maintain a target minimum turbine speed includes calculating a vehicle speed offset based on vehicle acceleration rate a predicted downshift delay for the target minimum turbine speed and converting the target minimum turbine speed to a target vehicle speed based on the deceleration condition. Thereafter, the method continues with determining a target gear based on the vehicle speed offset and the target vehicle speed, and downshifting to the target gear having vehicle speed less than or equal to a vehicle speed corresponding to the current turbine speed. The method ends with maintaining the target gear until a shift delay period is greater than a predetermined delay threshold.

Method of adjusting deceleration dependent shift points

A method of controlling a ground vehicle includes providing the vehicle with a first sensor configured to detect a vehicle position, a second sensor configured to detect a driven path of the vehicle, and a controller. The method also includes obtaining, via the first sensor, a plurality of vehicle position coordinates during a time interval of a drive cycle, and calculating, via the controller, a first path curvature parameter based on the plurality of vehicle position coordinates. The method additionally includes obtaining, via the second sensor, a second path curvature parameter based on the driven path during the time interval. The method further includes comparing, via the controller, the first path curvature parameter to the second path curvature parameter, and in response to a difference between the second path curvature and the first path curvature exceeding a threshold, automatically operating the controller according to a diagnostic mode.

System and method for sensor diagnostics

A method for transmission upshift sequencing includes detecting a lift foot gear hold condition is met and that a current engine speed is greater than a pattern gear engine speed for the current gear. If these conditions exists then the current gear is held until a first sequence timer expires and then an upshift event occurs to a first gear having an engine speed less than the current engine speed. The first gear is then held until a at least one other sequence timer expires and, thereafter, at least one other gear is selected and held until the engine speed is less than or equal to a pattern gear engine speed.

Method for controlling upshift sequencing

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Huntington Woods, MI, United States of America

Henry R Wright