US 11,485,372 B2Granted

Standalone-type rear wheel steering control apparatus and method thereof

AssigneeHyundai Mobis Co., Ltd.

InventorMoon Cheon Choi

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Abstract

Disclosed herein is an apparatus for controlling standalone-type rear wheel steering (RWS), which includes a vehicle speed detection unit for detecting a vehicle speed by communicating with a sensor installed in a vehicle or an Electronic Control Unit (ECU); a steering angle and steering angular velocity detection unit for detecting steering angles and steering angular velocities of front and rear wheels by communicating with a sensor installed in the vehicle or the ECU; a master cylinder pressure detection unit for detecting a master cylinder pressure by communicating with a sensor installed in the vehicle or the ECU; and a controller for determining braking or turning of the vehicle using the information detected using the sensors or received from the ECU, calculating the amount of toe-in when the vehicle is braking or calculating a rear wheel steering angle when the vehicle is turning, and controlling the RWS based thereon.

Claims12

Dependent claims

An apparatus for controlling a standalone-type rear wheel steering, comprising:

a vehicle speed detection unit configured to detect a vehicle speed by communicating with a sensor installed in a vehicle or with an Electronic Control Unit (ECU);
a steering angle and steering angular velocity detection unit configured to detect steering angles and steering angular velocities of a front wheel and a rear wheel of the vehicle by communicating with a sensor installed in the vehicle or with the ECU;
a master cylinder pressure detection unit configured to detect a master cylinder pressure by communicating with a sensor installed in the vehicle or with the ECU;
and
a controller configured to:
determine braking or turning of the vehicle using pieces of information detected by itself using at least one of the sensors or received from the ECU,
calculate an amount of toe-in based on the master cylinder pressure and the vehicle speed detected respectively by communicating with at least one of the sensors or with the ECU when the vehicle is braking,
calculate a rear wheel steering angle when the vehicle is turning, and to
control rear wheel steering depending on the calculated amount of toe-in or the calculated rear wheel steering angle.

6 more elements

A control method of an apparatus for controlling a standalone-type rear wheel steering, the method comprising:

detecting, by a controller of the apparatus for controlling the standalone-type rear wheel steering, data that is necessary in order to estimate a vehicle state, to compensate for a yaw rate, and to determine whether a vehicle is driving straight ahead or turning;
estimating, by the controller, the vehicle state using the detected data;
determining, by the controller, a current driving state of the vehicle based on the estimated vehicle state;
calculating, by the controller, a rear wheel steering angle to be controlled in response to turning when it is determined that the vehicle is turning as a result of determination of the current driving state of the vehicle;
performing, by the controller, same phase control or reverse phase control in order to determine a direction of rear wheels after the rear wheel steering angle is determined;
determining, by the controller, whether the vehicle is braking while driving straight ahead when it is determined that the current driving state of the vehicle does not correspond to turning;
calculating, by the controller, an amount of toe-in based on a master cylinder pressure and a vehicle speed detected respectively by communicating with one or more sensors installed in the vehicle or with an Electronic Control Unit (ECU) when it is determined that the current driving state of the vehicle corresponds to braking while driving straight ahead;
and
controlling, by the controller, rear wheel steering depending on the calculated amount of toe-in or the calculated rear wheel steering angle.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/381,652Filed 11 Apr 2019
Priority: KR 10-2018-004255112 Apr 2018
Published: US 2019/0315371 A117 Oct 2019
Granted: 1 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B60T 7/12
Brake-action initiating means: for automatic initiation; for initiation not subject to will of driver or passenger
B60W 50/00
Details of control systems for road vehicle drive control not related to
B60T 8/1755
Using electrical or electronic regulation means to control braking: brake regulation specially adapted to control the stability of the vehicle,…
B62D 6/002
Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits: computing…