A method for steering a vehicle, having a front axle with steerable wheels, a rear axle with steerable wheels, having a steering system including as its components a steering wheel operable by the driver and at least one automatic steering module, wherein a manual primary steering intervention is undertaken by the driver of the vehicle for the steering wheel, on the basis of which a manual primary steering reaction occurs for the wheels of the front axle, wherein on the basis of the manual primary steering reaction at least one automatic secondary steering intervention is undertaken with the at least one automatic steering module for the wheels of at least one axle.

A method for controlling a steer-by-wire steering system in a motor vehicle, wherein, by means of an operator element to be actuated by an operator, a control command for actuating a steering actuator acting on at least one wheel to be steered is output, and wherein, by means of a force application element acting on the operator element and in operative connection with the steering actuator, an actuation force for the operator element is set. In the case of a disturbance of the force application element, the steering actuator is actuated so that the control command applied by the operator element is transmitted only in a damped manner to the steering actuator.

In a steering assistance apparatus mounted in a vehicle, a steering input device and a turning device differentiate at a transmission ratio that is a ratio of an amount of change in the turning angle to an amount of change in the steering angle. A turning device actuator actuates the turning device. A controller executes an automatic steering mode, in which the controller determines the turning angle based on at least one of a travel condition and travel path information of the vehicle and controls the turning device actuator so as to achieve the determined turning angle. If detecting an input variation from the steering input device during execution of the automatic steering mode, the controller changes the transmission ratio to a value less than the transmission ratio in the automatic steering mode and prioritizes a manual steering mode over the automatic steering mode.

A method and a system for vehicle steering control by controlling a feedback torque actuator (130) in series with an angle overlay actuator (140) in a vehicle steering system (100) to provide a target feedback torque and a target overlay angle. The feedback torque actuator (130) is arranged above the angle overlay actuator (140). The angle overlay actuator (140) is controlled so that a variable steering ratio and an additional overlay angle are provided, and the feedback torque actuator (130) is controlled using a reference generator so that the torque is controlled to provide a target steering feel, resulting in the angle overlay being controlled at the same time as the steering-wheel torque being controlled whereby a target overlay angle and a good steering feel are achieved.

A steering column assembly includes a steering column shaft having a first end and a second end. The steering column assembly also includes an intermediate shaft coupled to the steering column shaft first end. The steering column assembly further includes a steering input pinion coupled to the intermediate shaft. The steering column assembly yet further includes a counter rotation mechanism causing a non-rotational condition of at least a portion of the steering shaft via counter rotational movement of the steering column assembly during rotation of the steering input pinion.

A driver torque estimation device includes: a transfer ratio variation device and a torsion bar; an electric motor; a torque sensor; an input shaft rotation acquisition unit configured to acquire the rotational angle of an input shaft of the transfer ratio variation device; and an electronic control unit configured to acquire the rotational angle of an output shaft of the transfer ratio variation device. The electronic control unit is configured to compute an estimated value of first disturbance. The electronic control unit is configured to compute an estimated value of second disturbance. The electronic control unit is configured to compute an estimated value of driver torque based on the torsion bar torque, the estimated value of the first disturbance, and the estimated value of the second disturbance.

A motor controller of a steering control apparatus is configured to drive, based on an assist command and a tracking command, a motor to thereby generate assist torque and automatic steering torque. A state determiner of the steering control apparatus is configured to determine at least whether a driver's steering state is a biased steering state or a return steering state in accordance with a first parameter associated with steering torque based on the driver's steering, and a second parameter associated with an angular velocity of the motor. A ratio changer of the steering control apparatus is configured to change a ratio of the assist torque to the automatic steering torque in accordance with a determination result of the state determiner.

A steering column assembly configured to couple to a steering wheel is provided. The assembly includes a steering column shaft having a first end and a second end, the second end configured to couple to the steering wheel. The assembly also includes an intermediate shaft coupled to the steering column shaft first end. The assembly further includes a steering input pinion coupled to the intermediate shaft. The assembly yet further includes a counter rotation mechanism configured to counter rotate rotational movement of the steering column assembly such that the steering wheel does not rotate.

A vehicle is provided. The vehicle may include an engine that is configured to auto-stop and auto-start. The system may also include a controller programmed to power an electrical actuator coupled to a steering mechanism to synchronize a drive angle of the vehicle and a steering wheel angle of the vehicle, in response to a parameter indicative of a likelihood of a wheel slip event exceeding a threshold and the steering-wheel angle being greater than a predetermined threshold.

A controller includes a control circuit configured to calculate a target corresponding steered angle that is a target value of a corresponding steered angle based on the transmission ratio associated with the vehicle speed. The corresponding steered angle is a rotation angle of a rotation shaft, which is convertible to the steered angle whose magnitude is changed relative to a value indicating the steering angle. The control circuit is configured to control the actuation of the motor so that an actual corresponding steered angle is a final target corresponding steered angle that is based on the target corresponding steered angle. The control circuit is configured to calculate the target corresponding steered angle by adjusting the transmission ratio based on a value indicating acceleration or deceleration of a vehicle.