US 11,912,253 B2
Symmetrically redundant solenoid valve for brake actuator and system thereof
Marcus L. Kuhl, Cedar Falls, IA (US)
Assigned to DEERE & COMPANY, Moline, IL (US)
Filed by DEERE & COMPANY, Moline, IL (US)
Filed on Dec. 3, 2020, as Appl. No. 17/110,776.
Claims priority of provisional application 62/987,620, filed on Mar. 10, 2020.
Prior Publication US 2021/0284118 A1, Sep. 16, 2021
Int. Cl. B60T 13/68 (2006.01); F16K 31/06 (2006.01); B60T 15/02 (2006.01); B60T 17/22 (2006.01)
CPC B60T 15/028 (2013.01) [B60T 13/686 (2013.01); F16K 31/0613 (2013.01); F16K 31/0679 (2013.01); B60T 17/221 (2013.01); B60T 2270/88 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrohydraulic valve system for controlling a braking system of a work machine, comprising:
a valve body forming a bore and a fluid channel;
a valve spool disposed within the bore and in fluid communication with the fluid channel, the valve spool including at least a first land and a second land;
an armature positioned with respect to the valve spool to move the valve spool axially within the bore between a first position and a second position;
a spring disposed within the bore and biasing the valve spool to its first position;
a first electromagnetic coil and a second electromagnetic coil arranged relative to one another and the armature for forming a magnetic field when energized;
a detent system positioned within the valve body, the detent system configured to exert a force to the valve spool or armature; and
a controller in electrical communication with the first electromagnetic coil via a first communication link and in electrical communication with the second electromagnetic coil via a second communication link, the first communication link and the second communication link independent from one another.