ASDS™ retrofit – complete solution for clean air in cities

Superior NOx reduction technology for commercial vehicles

ASDS™ is a NOx-reducing technology tailored for tackling emissions from commercial vehicle fleets. It is a proven commercial solution for upgrading fleets to Euro VI levels, thereby cost-efficiently securing access to Low Emission Zones..

By choosing ASDS over conventional AdBlue® solutions, you will get up to 99 % NOx reduction under the most challenging driving conditions, including

  • Slow urban driving
  • Stop ’n’ go driving 
  • After cold start
  • In cold climates.

ASDS is particularly well-suited for retrofitting city buses and refuse collection vehicles.

Two types of retrofit

Amminex offers two types of ASDS retrofit, NOx upgrade and Full upgrade.

In the NOx upgrade retrofit, we swap an existing AdBlue solution for ASDS while keeping the remaining exhaust aftertreatment system. By changing the reductant from AdBlue to ammonia gas, the overall NOx reduction will increase dramatically, and in some cases this approach will be enough for the vehicle to reach Euro VI compliant levels. Test data from a Euro V Volvo B9 bus operating at Metroline show that the OEM AdBlue solution on average removed 32 % of NOx emissions. After installing the ASDS system, the NOx conversion improved to 85 % under real driving conditions without changing or optimizing catalyst and engine.

In the Full upgrade, we retrofit the entire exhaust aftertreatment system to Euro VI standards, including a particle filter and an SCRT-type catalyst. This combination offers the ultimate emissions reduction with NOx reduction levels up to 99 % and particle reduction of 95 %.

Regardless of upgrade type, the installation process typically takes a day. As of January 2019, Amminex has retrofitted more than 600 buses, trucks and RCVs from Volvo, Scania, Mercedes, Alexander Dennis and Solaris. 

Benefits for fleet operators

Fleet operators enjoy several benefits when switching to ASDS. ASDS doses gaseous ammonia directly into the diesel exhaust line replacing conventional urea injection systems, thus eliminating reliability issues with deposits and clogging of pump or injector, leading to higher fleet uptime and lower maintenance costs.

The use of gaseous ammonia also unlocks the full potential of the SCR catalyst enabling ultra-low NOx emissions in all temperatures and real-driving conditions. This eliminates the need for thermal management, often resulting in a 3-5 % fuel penalty.

Using special tamper-proof cartridges that safely store the ammonia gas in solid state, there is no risk of spilling liquid, corrosive reductant on the vehicle, just as misfuelling AdBlue and Diesel will be a thing of the past.

The refilling ecosystem

Depending on vehicle type and usage pattern, a cartridge will typically last 2-5 days. Exchanging empty cartridges takes no special skills and can be done in less than a minute.

Each cartridge can be refilled up to 100 times. Empty cartridges are either sent to a local refill partner (UK) or to the Amminex production plant in Nyborg, Denmark. After refilling, pallets with cartridges are shipped back to the operator, ready to once again clean the air.

Online monitoring provides fully transparent performance

The ASDS system comes with a built-in online monitoring solution. The NOxTracker™ Dashboard provides historical and real-time insight into fleet operations. Main advantages for fleet operators

  • Analyze vehicle and fleet emissions performance
  • Schedule maintenance in advance
  • Easy and transparent reporting to authorities.



Fast payback on health cost savings

Every year, 75 000 Europeans die prematurely due to NOx pollution, and the associated health costs of NOx emissions are huge. According to calculations from the UK government, 1 kg NOx emitted in a city environmnet will cost 30 Euros in health expenses. Retrofitting with ASDS will remove 1 kg NOx for an approximate cost of 6 Euros, which essentially means a factor 5 return on investment due to fewer sick days and hospital bills.