Abstract: A front steering gear (18) is connected with steerable front wheels (12 and 14) of a vehicle (10). A rear steering gear (28) is connected with steerable rear wheels (30 and 32) of the vehicle (10). A torque sensor (40) connected with a steering wheel (16) provides an output to a controller (42). The controller (42) effects operation of the rear steering gear (28) in response to an output of the torque sensor (40) corresponding to manual application of at least a predetermined force to the steering wheel (16). Alternatively or in addition, the controller (42) may effect operation of a rear wheel brake (50 or 52) which is disposed on a radially inner side of a turn in response to the output from the torque sensor (40).

Abstract: A vehicle steering apparatus (10) includes a steering gear assembly (20) which is connected with a steerable vehicle wheel (12). A first sensor (26) has an output signal which is a function of steering wheel position. A second sensor (28) has an output signal which is a function of steerable wheel position. A controller (30) is operable to provide an output signal when the steerable vehicle wheel position does not correspond to the steering wheel position. A motor (34) is connected with a differential gear mechanism (36). The motor (34) is operable in response to the output signal from the controller (30) to effect operation of the differential gear mechanism (36) to actuate the steering gear assembly (20) and change the position of the steerable vehicle wheel (12).