The design of the spray nozzle on the EcoFit UL2 Liquid-Only Urea Dosing System offers improved atomization of urea, and is just one feature that sets this Cummins Emission Solutions system apart from all other liquid-only solutions in the market today, according to the company.

This system's freeze-robust components allow for optimal pump- priming and the prevention of crystallization throughout the unit, according to Cummins. Following the acquisition of Hilite International's Selective Catalytic Reduction (SCR) division in July 2012, Cummins Emission Solutions, a subsidiary of Cummins Inc., added the UL2 system to its engineered- components portfolio, and the system will be on display at the upcoming Mid-America Trucking Show (MATS).

The EcoFit UL2 Liquid-Only Urea Dosing System has been specifically designed and tested for leading emissions markets and allows customization in flow rates and spray cone angles. The intelligent doser, with temperature and pressure sensors at the point of injection, allows for flexible vehicle integration by accommodating varying dosing line lengths without affecting controls.

The challenges to urea dosing are surpassed by the system's unique dosing nozzle strategy, according to Cummins. The dosing nozzle provides improved oxides of nitrogen (NOx) conversion efficiency rates through urea droplet sizes unrivaled by those of competitive airless systems. With droplet sizes comparable to those of air-assisted systems, the likelihood of urea droplets in the Decomposition Reactor is significantly reduced. Keeping urea in the system prevents crystallization and clogging, eliminates the need for power at key-off for purging, allows quicker dosing at key-on and prevents damage to the system during intentional or unintentional power interruption of the vehicle.