Honda Motor Co., Ltd.

Thyssenkrupp Presta Ag

Thyssen Krupp Ag

Levente Pásztor

Yoshinobu Watanabe

Péter Kakas

Munetsugu Hanji

Krisztián Dömötör

Hayato Miyakawa

Imre Szepessy

Adam Szabo

Zoltán Szander

Daniel György

Yoschinobu Watanabe

Provided is a steer-by-wire steering system for a vehicle that can reduce or eliminate the impact noise generated by the rack at the rack end. A control unit of the steering system is configured to determine a target steered angle (αt) according to the steering angle and drive the steering actuator so as to cause the steered angle to coincide with the target steered angle, and to determine a target reaction force (Tt) according to a steered state of the wheels and drive the reaction force actuator so as to cause the reaction force to coincide with the target reaction force. The control unit is further configured to set a maximum limit (αmC) on the target steered angle, the maximum limit being a value smaller than a physical maximum steered angle (αmP) of the wheels imposed by the steering mechanism.

Steering system for vehicle

The vehicle steering control system includes a control unit configured to control the steering actuator to achieve the steered angle based on at least one of the steering angle and the steering torque. The control unit executes an output restriction control to restrict an output of the steering actuator when a steering torque is equal to or greater than a prescribed threshold value, and cancels the output restriction control when the detection unit has detected a prescribed mode of operation by the operator while the output restriction control is being executed.

Vehicle steering system

A method to control a steer-by-wire steering system of a road vehicle including a steering wheel coupled to a steering shaft, a road wheel actuator to turn steerable road wheels, a shaft sensor to detect a rotation of the steering shaft and a controller configured or programmed to generate an operation signal for the road wheel actuator from a signal detected by the shaft sensor, includes determining a real steering wheel angle by the shaft sensor, modifying the real steering wheel angle by applying an artificial hysteresis to create an offset between the real steering wheel angle and a modified steering wheel angle to mimic a behavior of an electromechanical power steering mechanism, and generating the motor torque request for the road wheel actuator based on the modified steering wheel angle.

Steer-by-wire steering system with artificial position hysteresis for steering wheel angle modification

A method to control a steer-by-wire steering system for a road vehicle including a steering device, a road wheel actuator to actuate road wheels, and a controller configured or programmed to generate a motor torque request for the road wheel actuator based on an actual or an estimated position and a position request, which is based on the position of the steering device, includes detecting a road wheel actuator power limit situation, modifying the position request so that it can be followed by the road wheel actuator within power limits, and using the modified position request to generate the motor torque request for the road wheel actuator.

Steer-by-wire steering system with road wheel actuator power limit handling

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Budapest, Hungary

Levente Pásztor