What is the function of the aftertreatment system on my towable generator?

As emissions regulations become more stringent and continue to drive towards a cleaner burning engine; towable generators have been impacted significantly regarding engine aftertreatment systems. These systems are required to achieve the appropriate levels of emissions, particularly on larger units.

The weak point in larger generators has historically been the risk of the catalyst clogging with particulate, wet stacking, when the generators are not run under significant load. While other manufacturers have resorted to incorporating costly external load banks to increase the load on the generator, Allmand Maxi-Power generators utilize several strategies to manage exhaust temperatures to ensure that the unit runs without issue even in lightly loaded conditions. 

In the Allmand Maxi-Power lineup, the MP65 and MP150, the level of technology incorporated into the product ensures that emissions levels are met while product reliability stays high. The strategy used on these models leverages a Diesel Oxidation Catalyst (DOC) and Selective Catalytic Reduction (SCR) with Diesel Exhaust Fluid (DEF) which has been largely accepted in the industry.

Allmand uses an exhaust throttle, active metering of the intake throttle body, timing of fuel injection events and dynamic engine timing modifications produce higher exhaust temperatures when needed to run the DOC through it’s regeneration cycle and keep the generator running efficiently and reliably.