Patent ID: 8239098
Filing Date: 2012-08-07
Classification: B62D,B66F

Abstract:
1. An industrial truck, in particular, a lift truck, with a drive axle ( 1 ) with drive wheels ( 66 ) and a drive motor ( 60 ), a steering axle ( 2 ) with two steerable wheels ( 46 ), a target value sensor ( 10 ), which is connected to a steering wheel ( 11 ), a steering motor ( 30 ), a steering device ( 40 ) that is in effective connection with a steering tie rod ( 42 ), a position transducer magnet ( 44 ) whose position is recorded by two magnetic resonance sensors ( 50 , 52 ), where the position transducer magnet ( 44 ) and the resonance sensors ( 50 , 52 ) are moved relative to each other during a steering movement of the steering device ( 40 ), and where the magnetic resonance sensors ( 50 , 52 ) generate counter directional analog signals for the actual value of the steering angle of the steerable wheels, a steering control ( 20 ), connected to the target value sensor ( 10 ), the steering motor ( 30 ), and the magnetic resonance sensors ( 50 , 52 ), which controls and evaluates the signals received from the target value sensor ( 10 ) and the magnetic resonance sensors ( 50 , 52 ), and controls the vehicle steering angle dependent upon the signals of one of the magnetic resonance sensors ( 50 , 52 ), to be the target steering angle, while both signals of the magnetic resonance sensors ( 50 , 52 ) are evaluated by the steering control ( 20 ) to recognize a malfunction of one of the magnetic resonance sensors ( 50 , 52 ).