Chrysler Corporation

Chrysler Group LLC

Mark Thompson

Steven T Houtman

Joseph Roy

Michael W Gapski

Michael A Dazy

Frank C Thompson, Iv

Jeffrey D Foor

Louis Moncion

A method to prevent chain jump in a drivetrain of a four-wheel drive vehicle including receiving sensed vehicle parameters from sensors in the four-wheel drive vehicle, generating transfer case chain-jump parameters based on the sensed vehicle parameters and sending a command signal to initiate disengagement of a clutch pack in a transfer case of the drivetrain responsive to the generated transfer case chain-jump parameters.

Method to prevent chain jump in a drivetrain

An on-demand four wheel drive system for a vehicle having a front drive train, a rear drive train, and a transfer case. The system includes a sensor system operable to detect the speed of the front drive train and the speed of the rear drive train. The system also includes a controller operable to cause the transfer case to supply input torque to the front drive train and the rear drive train when the sensor system detects that the speed of the rear drive train exceeds the speed of the front drive train by a predetermined amount. The controller is further operable to cause the transfer case to limit the amount of input torque supplied to the front drive train when the sensor system detects that the speed of the front drive train exceeds the speed of the rear drive train.

On-demand four wheel drive system

A method to reduce backlash in a drive train of a four-wheel drive vehicle, the method including receiving rotational parameters from sensors in the four-wheel drive vehicle, determining a torque reversal in the drive train based on the received rotational parameters and sending a command signal to initiate engagement of a clutch pack in a transfer case of the drive train responsive to the determination.

Method to reduce backlash in a drive train

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Windsor, CA, United States of America

Mark Thompson