As part of its ongoing efforts to find a practical alternative
to liquid urea based SCR, Navistar has entered a long term
agreement with Danish technology firm, Amminex. By acquiring a
stake in the firm, Navistar hopes to employ a system that fits the
company's favoured advanced EGR platform. Amminex has developed an
ammonia storage and delivery system (ASDS) for passenger cars as
well as heavier vehicle use, which utilises non-pressurised ammonia
and saturated inorganic salt, compacted into a hand-sized cartridge
- known as AdAmmine.
Navistar's view that emission control responsibility lies with
the manufacturer is reflected in this new product, which is
replaced as a spare part during oil services. Navistar's EPA
2010 compliant vehicles currently rely on the use of emission
credits to offset the extra 0.2g/bhp-hr of NOx that the EGR
MaxxForce engines account for. Navistar is hoping that the ASDS
technology will bring its engines up to EPA standards.