Real-time control of reductant droplet spray momentum and in-exhaust spray distribution

A method comprising:

• accessing a current vehicle condition parameter, wherein the current vehicle condition parameter comprises at least one of a vehicle speed, a vehicle tire pressure, a vehicle inclination angle, a vehicle drive gear selection, a vehicle mass, a vehicle weight, a vehicle trailer weight, or a vehicle air line pressure;
• determining one or more control parameters based on a control model and as a function of the accessed current vehicle condition parameter;
• modifying a value of an injection parameter or a supply parameter based on the one or more control parameters to control a reductant spray momentum, a reductant droplet momentum, or a reductant momentum vector from a reductant injection system so as to provide a target spray droplet distribution or a target spray distribution;
• and
• commanding the reductant injection system to inject reductant into an exhaust gas based on the injection parameter or a reductant supply system to supply reductant to the reductant injection system based on the supply parameter.