Patent attributes
A steer-by-wire steering system includes a steering wheel. Also included is a steering shaft operatively coupled to the steering wheel and rotatable therewith. Further included is a steering gear input shaft operatively coupled to an electric power assist steering gear. Yet further included is an electric actuator operatively coupled to the electric power assist steering gear. Also included is a controller in operative communication with the steering shaft and the electric actuator for steering in a primary mode. Further included is an intermediate shaft assembly mechanically coupling the steering shaft to a rack and pinion assembly to steer in a redundant mode when communication between the steering shaft and the steering gear input shaft is not available.