Patent ID: RE41358

Claim:
An automatic steering control system for a vehicle, which comprises: a GPS receiver; a guidance controller connected to the GPS receiver; a vehicle steering system including a steering actuator and a steering power source connected to the steering actuator; a steering input device connected to the steering power source and the steering actuator; the guidance controller being operably connected to the steering input device; a loop for feeding back an operating parameter to the guidance controller, said operating parameter corresponding to a GPS-derived actual turning rate for comparison to a desired turning rate and automatic correction to a desired guide pat initiated automatically by said guidance controller in response to a discrepancy between said desired turning rate and said actual turning rate determined utilizing GPS-derived vehicle position, around speed, steering rate and course information item said GPS receiver and said guidance controller, and said correction to said desired guide path occurring automatically in response to said actual turning rate parameter based on GPS-derived vehicle position, ground speed, steering rate and course information without operator intervention.