Hydraulic retarding control system

A hydraulic control system of a work machine, the hydraulic control system comprising:

• a pump, the pump configured to supply pressurized fluid to the hydraulic control system via a supply line;
• a control valve fluidly coupled to the pump via the supply line, the control valve including a pressure relief valve;
• and
• a retarding control valve fluidly connected to the pump and the control valve via the supply line, the retarding control valve including a solenoid valve coupled to a machine controller, an orifice restricting a flow of the pressurized fluid through the supply line, and a check valve coupled to a discharge line, the discharge line configured to branch from a point along the supply line between the solenoid valve and the orifice.

A retarding control valve of a work machine, the retarding control valve comprising:

• a proportional solenoid valve coupled to a machine controller, the machine controller configured to determine a retarding requirement and to actuate the solenoid valve based on the determined retarding requirement, the solenoid valve being fluidly coupled to a hydraulic pump via a supply line;
• an orifice positioned downstream from the proportional solenoid valve and fluidly connected to the solenoid valve, the orifice restricting a flow of a pressurized fluid through the supply line when the solenoid valve is actuated;
• and
• a spring-loaded check valve coupled to a discharge line, the discharge line configured to branch from a point along the supply line between the solenoid valve and the orifice, the check valve configured to selectively allow a unidirectional flow of the pressurized fluid from the branch point along the supply line to a load sense line.