US 12,441,398 B2
Work vehicle steering control apparatus
Osamu Muto, Konosu (JP); and Kunihiro Mori, Ageo (JP)
Assigned to KABUSHIKI KAISHA AICHI CORPORATION, Saitama (JP)
Filed by KABUSHIKI KAISHA AICHI CORPORATION, Saitama (JP)
Filed on Sep. 22, 2022, as Appl. No. 17/934,529.
Claims priority of application No. 2021-160393 (JP), filed on Sep. 30, 2021.
Prior Publication US 2023/0101102 A1, Mar. 30, 2023
Int. Cl. B62D 7/15 (2006.01)
CPC B62D 7/159 (2013.01) [B62D 7/1581 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A work vehicle steering control apparatus comprising:
a vehicle body;
front wheels rotatably provided at left and right sides of front part of the vehicle body and rear wheels rotatably provided at left and right sides of rear part of the vehicle body, the front wheels and the rear wheels being able to be steered respectively;
a steering actuator which steers the front wheels and/or the rear wheels respectively and independently to turn the work vehicle;
a steering operation device which is operated by an operator to turn the work vehicle;
a steering actuation control device which controls for controlling actuation of the steering actuator based on operations of the steering operation device; and
a steering angle detector which detects steering angles of the front wheels and the rear wheels, wherein
when the steering operation device is operated, on the basis of a detection by the steering angle detector,
when a detected steering angle of one set of wheels of either the front wheels or the rear wheels is less than a predetermined angle and a detected steering angle of the other set of wheels is substantially zero, the steering actuation control device controls the steering actuator to steer only the one set of wheels to turn the work vehicle in response to operation of the steering operation device and to keep the other set of wheels being substantially zero, and
when the steering angles of the one set of wheels are equal to or more than the predetermined angle, the steering actuation control device controls the steering actuator to steer the other set of wheels in a direction opposite to steering direction of the one set of wheels in response to operation of the steering operation device without steering the one set of wheels.