A column assist steering device includes: a steering member (101) steered by an operator; a drive unit (102) rotating for imparting an auxiliary force to the steering member (101); a first control unit (123) calculating a load torque that corresponds to a reaction force from a road surface and is estimated based on a value measured in parameters obtained from the steering member (101) and the drive unit (102), the first control unit (123) also calculating a target steering torque for the steering member (101) based on the calculated load torque; and a second control unit (122) calculating the auxiliary force of the drive unit (102) to achieve the target steering torque calculated by the first control unit (123). The first control unit (123) calculates a steering torque that corresponds to the reaction force based on the load torque and a vehicle speed, calculates a restoring torque that returns the steering member (101) to its neutral position and a damping torque that controls abrupt steering of the steering member (101) based on the vehicle speed, and calculates the target steering torque based on the calculated torques.
STEERING DEVICE AND STEERING UNIT DEVICE
LENKVORRICHTUNG UND LENKEINHEITSVORRICHTUNG
DISPOSITIF DE DIRECTION ET DISPOSITIF D'UNITÉ DE DIRECTION
2022-10-26
Patent
Electronic Resource
English
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
POWER STEERING DEVICE AND POWER STEERING DEVICE CONTROL UNIT
European Patent Office | 2017
|European Patent Office | 2017
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