Steer-by wire steering system

A steer-by-wire steering system for a vehicle, comprising:

• an operation member operable by a driver of the vehicle;
• an urging device configured to generate an urging force to urge the operation member;
• a steering device configured to steer a wheel that is not mechanically coupled to the operation member;
• and
• a controller configured to control the urging device and the steering device,
• wherein, in a normal operation, the controller enables the wheel to be steered in accordance with an operation of the operation member and causes the urging force to function as an operation reaction force against the operation of the operation member,
• wherein, in an automatic steering operation in which the wheel is steered without depending on the operation of the operation member, the controller enables the operation member to be moved in accordance with steering of the wheel by the urging force and causes at least part of the urging force generated in the normal operation not to be generated, and
• wherein the at least part of the urging force comprises a steering-load-dependent component as a component that is based on an axial force that acts on a steering rod or a rack bar and that includes a force that acts on the wheel from a road surface, the steering-load-dependent component acting in a direction opposite to an operation direction of the operation member.