Pressurized tank vehicular fluid delivery system

A method of controlling delivery of a vehicular fluid, comprising:

• pressurizing, using a control module, a tank containing the vehicular fluid using compressed air from a compressed air source, the tank including an outlet at a bottom of a lower portion of the tank;
• and
• selectively releasing, using the control module, the vehicular fluid to a component of a vehicle via a dosing module, the dosing module fluidly coupled to the tank via the outlet,
• wherein no vehicular fluid pump is in fluid communication with either the tank or the dosing module such that the compressed air from the compressed air source pressurizes the dosing module with the vehicular fluid.

A reductant delivery system for supplying a fluid for a selective catalytic reduction system of a vehicle having an engine that produces an exhaust gas containing nitrogen oxide, the reductant delivery system consisting essentially of:

• a compressed air source;
• a tank in fluid communication with the compressed air source, the tank configured to contain a diesel exhaust fluid, the tank including an outlet at a bottom of a lower portion of the tank;
• a dosing module in fluid communication with the tank via the outlet, the dosing module in fluid communication with a component of a vehicle that receives the diesel exhaust fluid;
• a relief valve in fluid communication with the tank and the dosing module, the relief valve configured to purge compressed air from the tank in response to a deactivation of the vehicle;
• and
• a controller mechanism coupled to the compressed air source, the controller mechanism configured to regulate an amount of air pressure in the tank.