Gm Global Technolgoy Operations, Inc.

Robert Boschgmbh

Daniel Sigfus Maitlen

Trevor P Hunt

Hualin Tan

Jeremy P Gray

Grant A Soremekun

Jeffrey M Roder

Travis D Hunt

Jeff Roder

Trevor Hunt

Travis Hunt

Examples described herein provide a computer-implemented method that includes defining, by a processing device, a plurality of parameters so that any orthogonal intersection can be described. The method further includes building, by the processing device, an orthogonal parameterized model that can represent any orthogonal intersection based at least in part on the plurality of parameters that can describe any intersection of interest. The method further includes expanding, by the processing device, the orthogonal parameterized model to generate a fully parameterized intersection model that accounts for intersection complexities. The method further includes building, by the processing device, a low-fidelity analytical that computes various metrics based on the fully parameterized intersection model.

Sensor coverage analysis for automated driving scenarios involving intersections

A system and method for monitoring wheel hub temperatures and odometry in trailer axles. The system includes a spindle (), an inner bearing (), an outer bearing (), a wheel hub () engaging the spindle () via the inner and outer bearings (), a thermocouple () positioned within the spindle (), and an electronic control unit (). The electronic control unit () is electrically coupled to the thermocouple () and configured to receive from the thermocouple (), a temperature signal. The electronic control unit () is configured to determine, from the temperature signal, a temperature. The electronic control unit () is configured to compare the temperature to a predetermined threshold. The electronic control unit () is configured to, when the temperature exceeds the predetermined threshold, indicate a fault.

Systems and methods for monitoring wheel hub temperatures and odometry in trailer axles

Techniques of braking a trailer with a trailer braking system. In one example, a controller receives a brake request from a vehicle to apply the trailer braking system, receives a plurality of wheel speed signals from a plurality of wheel speed sensors, and determines a velocity of the trailer based on the plurality of wheel speed signals. The controller determines a wheel speed of one of a plurality of wheels based on one of the plurality of wheel speed signals, compares the velocity of the trailer to the wheel speed to obtain a difference value, and determines that one of the plurality of wheels is unstable when the difference value exceeds a threshold. A braking signal to reduce a braking force on one of the plurality of wheels is generated when one of the plurality of wheels is unstable and when the brake request is received.

Trailer antilock braking system

A trailer brake control method that includes determining, based on information from a vehicle speed sensor, a current vehicle speed of a vehicle; and regardless of the current vehicle speed, determining, using a processing unit, a minimum trailer brake control value (MTBCV) based on the equation MTBCV=R1&#x2212;Cth root(the current vehicle speed)/R2, wherein the minimum trailer brake control value corresponds to a minimum braking force at the current vehicle speed, R1 is a real number less than 1.0, C is an integer greater than 2, and R2 is a real number greater than 1.0. The method also includes determining, using the processing unit, a trailer brake command signal based on the minimum trailer brake control value; and operating brakes of a trailer connected to the vehicle at or above the minimum braking force by transmitting the trailer brake command signal from the vehicle to a trailer.

Integrated trailer brake control system and method for controlling a brake force

A trailer brake control method for a vehicle towing a trailer. The method may include determining a number (N) of vehicle operating points during a first braking event when the vehicle is not towing the trailer by determining N brake operating points; determining an acceleration operating point for each of the N brake operating points; and determining a first relationship between brake pressure and vehicle acceleration based on the N vehicle operating points. The method also includes determining a number (M) of vehicle operating points during a second braking event when the vehicle is towing the trailer; determining a current brake operating point; and determining a trailer brake command signal based on at least the first relationship, the M vehicle operating points, and the current brake operating point.

Integrated trailer brake control system and method using a learned relationship

A system, method and computer program product is provided for detecting if a vehicle has spun. A normal force and a lateral force of each of a front and rear axle of a vehicle is estimated. A coefficient of friction representative of a surface is estimated. Lateral momenta of the front and rear axles based on the coefficient of friction and the normal and lateral forces is calculated. Whether a surplus momentum is present, is determined. If the surplus momentum is present, a yaw rate of the vehicle is integrated respect to time to obtain a vehicle rotation estimation.

System and method for detection of spun vehicle

A method of estimating a speed of a vehicle is provided. The vehicle has a wheel and the method comprises receiving a first wheel speed signal indicating a rotation rate of the wheel, determining a first calculated forward speed of the vehicle based on the first wheel speed signal, receiving a first steering signal, determining the first steering signal contains information indicating large steering activity, receiving a second wheel speed signal at a later time than the first wheel speed signal, and determining, in response to receiving the first steering signal, a second calculated forward speed of the vehicle that is based on the second wheel speed signal and the first calculated forward speed.

Multi-factor speed estimation system and method for use

A system, method and computer program product is provided for detecting if a vehicle is stopped. A wheel speed, transmission output speed, and a vehicle state, representative of a plurality of vehicle dynamic parameters, is determined. The vehicle is determined to be stopped if, after a predetermined period of time, the wheel speed and transmission output speed remain zero and the vehicle state remains stable.

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Farmington Hills, MI, United States of America

Daniel Sigfus Maitlen