Pressure controlled multi-mode multi-way valve for water spray distribution on radiator for fuel cell electric vehicle

A thermal management system for a vehicle having a fuel cell stack, the thermal management system comprising:

• a radiator thermally coupled to the fuel cell stack;
• a storage reservoir that stores liquid product water from the fuel cell stack;
• a pump that pumps the liquid product water;
• a main valve assembly that receives the liquid product water from the pump, the main valve assembly having a valve housing that selectively delivers the liquid product water to a drain and to a first spray manifold that sprays the liquid product water at the radiator, the valve assembly including:
• a first valve assembly disposed in a drain valve chamber of the valve housing and having a first biasing member that biases a first pin against a first inlet, the first valve assembly selectively communicating the liquid product water to the drain;
• and
• a second valve assembly disposed in a second valve chamber of the valve housing and having a second biasing member that biases a second pin against a second inlet, the second valve assembly selectively communicating the liquid product water to the first spray manifold, the first biasing member having a distinct spring rate from the second biasing member wherein a first water pressure opens the first inlet of the first valve assembly without the second valve assembly opening the second inlet;
• and
• a controller that commands the pump to operate at a predetermined revolutions per minute (RPM) based on operating conditions to achieve the first water pressure.