Gm Global Technolgoy Operations, Inc.

Steven T Schweitzer

Nikolai K Moshchuk

Qingrong Zhao

Qi Zhang

Yadollah Sabri

James R Walter

Yingmei Si

Simon E Zimmerman

Jason Matthew Kolk

Satish Sundaram

A system and method for electronically controlling a limited slip differential is disclosed. The method includes determining, by an electronic controller of a vehicle, a request for a limited-slip-differential coupling torque to be applied. The request is based upon an estimation of the vehicle's mass. The method also includes transmitting the request to an electronic limited slip differential of the vehicle. The electronic limited slip differential is configured to apply the requested limited-slip-differential coupling torque.

Method and system for controlling a limited slip differential

Methods and systems are provided for determining a road surface friction coefficient and controlling a feature of the vehicle based thereon. In one embodiment, a method includes: receiving signals from an electronic power steering system and an inertial measurement unit; estimating parameters associated with an electronic power steering system model using an iterative optimization method; calculating an electronic power steering system variable using the electronic power steering system model, the estimated parameters and one or more of the received signals; determining whether the calculated electronic power steering system variable satisfies a fitness criterion; and when the calculated electronic power steering system variable does satisfy the fitness criterion, determining a road surface friction coefficient based on at least one of the estimated parameters.

Methods and systems for estimating road surface friction

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Sterling Heights, MI, United States of America

Steven T Schweitzer