Gm Global Technolgoy Operations, Inc.

Hasan Alper Hepguvendik

Avesta Goodarzi

Patrick G DiGioacchino

Joseph K Moore

Mansoor Alghooneh

Utkarsh Saini

Patrick Giancarlo Gabriel Digioacchino

Alexander S Barath

Amin Habibnejad Korayem

Angelica Jb Francoeur

Patrick R Derkacz

Aaron W Logan

Mojtaba Kazemi Miraki

Luke A Stack

Gavin Gaw-Wae Lee

Justin C Logan

Daniel W Ahmoye

Methods and systems are provided for estimating weight-related parameter values of a vehicle. The system includes a sensor system, a display device, and a controller configured to, by a processor, receive, from the sensor system, static sensor data sensed while the vehicle is stationary and coupled to a trailer and dynamic sensor data while the vehicle is being driven and not coupled to the trailer, wherein the static sensor data includes a deflection value associated with a suspension system of the vehicle, estimate, while the vehicle is stationary, one or more weight-related parameter values using a suspension model and the static sensor data, determine degradation of the suspension system over time using a suspension sag estimation model and the dynamic sensor data, update the suspension model to accommodate for the degradation of the suspension system, and display the one or more weight-related parameter values on the visual display.

Methods and systems for vehicular weight-related parameter estimation

Methods and systems automatically scale and set trailer brake gain without a need for vehicle driver input and without testing. Scaling a trailer brake gain of a trailer towed by a vehicle includes obtaining sensor data via one or more sensors of the vehicle. A processor computes a trailer weight of the trailer and a trailer resistance force of the trailer. The processor automatically updates the trailer brake gain based on both the trailer weight and the trailer resistance force and may use vehicle data and axle torque.

Methods and systems for automatic trailer brake gain scaling

A method for finding an optimum trailer gain, comprising: applying trailer brake pulses to a trailer while a vehicle is coasting using a trailer brake of a trailer, wherein the trailer is coupled to the vehicle; monitoring an average deceleration of the vehicle and the trailer brake gain of the trailer brake pulses applied to the trailer while the vehicle is coasting; generating a graph of the average deceleration of the vehicle versus the trailer brake gain, wherein the graph includes a curve that illustrates a relationship between the average deceleration of the vehicle and the trailer brake gain of the trailer brake pulses applied to the trailer while the vehicle is coasting; and finding a bend point of the curve in the graph to determine an optimum trailer brake gain.

Vehicle-based algorithm for finding the trailer brake optimum gain

Trailer brake gain in a towing configuration of a tow vehicle and a trailer is determined by providing, to a processor, trailer wheel rotation information. The processor provides trailer brake control signals at a plurality of different evaluation trailer brake gains. The processor determines the trailer brake gain based upon the trailer wheel rotation information corresponding to the plurality of different evaluation trailer brake gains.

Trailer brake gain determination

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Toronto, Canada

Hasan Alper Hepguvendik