Symmetrically redundant solenoid valve for brake actuator and system thereof

An electrohydraulic valve system for controlling a braking system of a work machine, comprising:

• a valve body forming a bore and a port, the port being fluidly coupled to the bore;
• a valve spool disposed within the bore and in fluid communication with the port, 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;
• and
• a magnet positioned within the valve body, the magnet configured to exert an axial force to the valve spool or armature;
• wherein the magnet is coupled to the second land in the first position and to the first land in the second position.

A braking control system for a work machine, comprising:

• a controller;
• a brake actuator for engaging or disengaging a brake;
• and
• an electrohydraulic valve system comprising:
• a valve body including a port disposed in fluid communication with the brake actuator;
• a valve spool disposed within the valve body and in fluid communication with the port, 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 valve body between a first position and a second position;
• a spring disposed within the valve body 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;
• and
• a detent system positioned within the valve body, the detent system configured to exert an axial force to the valve spool or armature;
• wherein, the first electromagnetic coil is in electrical communication with the controller via a first communication link, and the second electromagnetic coil is in electrical communication with the controller via a second communication link;
• further wherein, the first communication link and the second communication link are independent from one another.