JTEKT

A steer-by-wire type steering system includes an operation unit including an operation member and a reaction force applying device, a steering unit configured to steer at least one wheel, and a controller. The controller includes a plurality of control modes each having a different steering characteristic. The controller is configured to change the steering characteristic by executing a plurality of characteristic change controls each configured to change a predetermined control parameter related to a control of the reaction force applying device and/or the steering unit. In response to switching of the control mode, the controller is configured to execute, when it is determined that a vehicle state satisfies a predetermined condition, one or more of the plurality of characteristic change controls, and execute, regardless of whether the vehicle state satisfies the predetermined condition, another one or more of the plurality of characteristic change controls.

A power transmission resin gear 1 includes an annular resin part 3 having, on an outer peripheral surface thereof, teeth 10 of a gear. The annular resin part 3 includes an annular inner resin member 4 that covers an outer periphery of a core metal 2 and an annular outer resin member 5 that covers an outer periphery of the annular inner resin member 4. The annular inner resin member 4 has a plurality of axially downgauged portions 6 arranged at intervals in a circumferential direction. The annular outer resin member 5 has filling portions 8 respectively filling the axially downgauged portions 6 and an axial surface covering portion 9 that is located radially inward RI of a tooth side 10C of the teeth 10 and covers the filling portions 8.According to the power transmission resin gear 1, deformation of a molded product due to forcible removal can be reduced without preparing a special tooth shape.

A steer-by-wire steering system including: an operation member (10) to be operated by a driver; a reaction force applying device (12) configured to apply an operation reaction force to the operation member (10); a steering device(16) including a steering motor (38) that is an electric motor as a drive source and configured to steer a wheel (14); and a controller (40, 42) configured to control the reaction force applying device (12) and the steering device (16), wherein the controller (40, 42) determines the operation reaction force including a steering-current-dependent component which is a component based on a current supplied to the steering motor (38) and a steering-speed-dependent correction component to reduce the steering-current-dependent component based on a steering speed; and wherein the controller (40, 42) determines the steering-speed-dependent correction component such that when the steering speed exceeds a set speed, the steering-speed-dependent correction component is not larger than a value at the set speed.

A steering system of a steer-by-wire type, provided in a vehicle, includes a turning device (12) configured to turn wheels (FW1,FW2) of the vehicle, a reaction force device (10) configured to apply a reaction force to a steering operation member (20) operable by a driver, and a controller (39,40) configured to control the reaction force. The controller (39,40) is configured to control the reaction force based on a phase-adjusted deviation (Ds), the phase-adjusted deviation being a deviation between an actual steering angle (δm) and a target steering angle (δt), a phase in the phase-adjusted deviation having been adjusted, and the actual steering angle being an actual steering angle of the wheels (FW1,FW2) , the target steering angle being a target value of the steering angle of the wheels (FW1,FW2).

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Zusammenfassung wird geladen …

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