Crown Equipment Corporation

Navistar International Transportation Corporation

International Truck and Engine Corporation

Brent A Barnhart

Stephen Mangette

Stephen T Mangette

Joe K Hammer

Brian P Marshall

Nathan L Schuler

Michael P Lasecki

Theodore L Badgley

A steering application executing on a vehicle control module receives a steering control input to control a steered wheel of a vehicle and, based on the steering control input, determines a setpoint value for the steered wheel. A diagnostic supervisor receives a measured value of the control attribute and the setpoint value; wherein the first diagnostic supervisor comprises a first model of a steering system of the vehicle. Based on the setpoint value and the first model, the diagnostic supervisor calculates a virtual value of the control attribute and, based on the virtual value and the measured value of the control attribute the first diagnostic supervisor determines an operating condition of the steering system of the vehicle.

Model based diagnostics based on steering model

A traction application executing on a vehicle control module receives a traction speed control input to control a traction wheel of the vehicle. Based on the traction speed control input, the traction application determines a first setpoint value of a control attribute related to the traction wheel. A first diagnostic supervisor receives a measured value of the control attribute related to the traction wheel, and the first setpoint value from the traction application. The first diagnostic supervisor comprises a first model of a traction system of the vehicle. Based on the first setpoint value and the first model, the first diagnostic supervisor calculates a first virtual value of the control attribute related to the traction wheel. Based on the first virtual value and the measured value of the control attribute, the first diagnostic supervisor determines a first operating condition of the traction system of the vehicle.

Model based diagnostics based on traction model

Based on a steering control input, a measured value of the steering control attribute and a measured value of the traction control attribute received by a steering application, determining: a first setpoint value of the steering control attribute; a target steering angle of the steered wheel of the vehicle. Based on receiving, by a traction application executing on the vehicle control module of the vehicle: a traction speed control input to control the traction wheel of the vehicle, and the target steering angle, from the steering application, determining, by the traction application: a second setpoint value of the traction control attribute.

Steering and traction applications for determining a steering control attribute and a traction control attribute

A steering application executing on a vehicle control module receives a steering control input to control a steered wheel of a vehicle. Based on the steering control input, the steering application determines a traction threshold value associated with a traction control attribute related to a traction wheel of the vehicle. A first diagnostic supervisor executing on the vehicle control module receives a measured value of the traction control attribute and the traction threshold value. When the measured value of the traction control attribute exceeds the traction threshold value, the first diagnostic supervisor repeatedly calculates a respective difference between the traction threshold value and the measured value of the traction control attribute to generate a set comprising a plurality of the respective differences. Based on the plurality of respective differences, the first diagnostic supervisor determines a first operating condition of a traction system of the vehicle.

Diagnostic supervisor to determine if a traction system is in a fault condition

The invention provides a cranking inhibition control system for an electric starter to an internal combustion engine. Engine rotational speed is developed from the signal produced by a cam shaft position sensor, which drives the logic of the system. Responsive to changes in engine rotation speed which result in engine speed falling below idle speed, the control logic generates a temporary cranking inhibit signal. Once engine speed falls low enough to clearly indicate cranking has ceased, a timer is triggered which resets the inhibit signal to permit cranking after a suitable delay.

System and method for preventing start pinion/gear ring engagement during selected engine start conditions

An interface for interfacing an accelerator control input, a service brake control input, and a parking brake control input with a hybrid electric vehicle's electric control system that controls propulsion of the vehicle by controlling the motor torque output of an electric traction drive motor that drives driven wheels of the vehicle. The application of either the service brakes or the parking brake concurrent with the accelerator pedal being at non-idle causes the interface to override the motor torque being requested by the accelerator control input in favor of a zero motor torque request to the control system.

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Van Wert, OH, United States of America

Brent A Barnhart