PURItech - Model PURImax - Diesel Particulate Filter
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PURItech has an effective emission control solution for virtually every diesel engine. For the most demanding situations, PURItech has developed the PURImax system. PURImax reduces emissions of gaseous pollutants (CO: -96%, HC -92%, NOx; -30%) purely by using a catalytic coating without the addition of a reducing agent or substance. Particulate filtration of >99% is delivered by a ceramic wall-flow filter.
PURImax gives outstanding performance.
PURImax gives outstanding performance.
PURImax ensures high NOx (NO and NO2) reduction from diesel engines during idling, hence high nitrogen oxide reduction during ‘stop-go / city driving’ (SCR systems on EURO V & EURO VI vehicles are unableto deliver this). In particular, high NO2 reduction (TUV test for the ETC cycle resulted in a reduction of 67% NO2), which is independent of low exhaust gas temperature, has been proven. All regulated exhaust pollutants are reduced to such an extent that is possible to reach the next level of the EURO standards (EURO III to EURO IV). By injecting hydro-carbon over a catalyst, automatic filter regeneration is achieved with low exhaust gas temperatures (stop-and-go / city driving), in diesel engines with high exhaust gas opacity levels or in older diesel engines with high raw emissions.
PURImax – DPF systems with NO2 / NOx reduction
The graph shows the changing of the NO2 emissions of particulate reduction systems (PMS) providers, which have an ABE obtained according to the „Appendix XXVII“. This clearly shows that other providers of DPF, increased the harmful NO2 between 100% and 1000%! The PURImax system from PURItech reduced NO2 by a considerable amount. From 2015 we all must adhered to, in cities within the EU, NO2 annual mean of 40μg / m³. This will affect vehicles with an increased rate of NO2 emissions in important European city centres (environmental zones).
Functional Schematic:
- Buzzer + LED display (functional monitoring)
- Central processing unit: ECU, injection pump, system monitoring, datalogger, CAN-port
- Backpressure measuring line
- Temperature sensor 1 +2
- Injection nozzle
- Diesel particle filter
- Pre-filter
- Fuel line
Technical Data
- Applicable for : Severe duty cycle (low load) / Stop-and-go operation
- Regeneration Type : Combined Regeneration: Active + Passive
- Regeneration Temp : from 230°C exhaust temp. > 15% of operation time
- Regeneration Time : Permanent self-cleaning during operation
- Emission Reduction : Particle mass -95% / Carbonmonoxide (CO) Nanoparticles -99% / Hydrocarbons (HC) -99%
- Installation : Filter installation in place of silencer
PURItech optimises the design of its emission cont...
PURItech optimises the design of its emission control systems in every way. Thus a PURItech filter typically has a larger filter volume and a better aspect ratio (diameter to length) and a greater cell density than the filter models of much of the competition. This results in several advantages: there will be a better catalytic effect and thus it is more likely passive soot burning will take place. As a direct result of this, money can be saved because a lower average exhaust back pressure is achieved, which results in reduced fuel consumption. In addition, due to longer maintenance intervals – a PURItech filter need only be cleaned every 150,000 km, – therefore, the vehicle / machine will be able to stay longer in continuous use.
If the vehicle is operated at sufficient load (250...
If the vehicle is operated at sufficient load (250-350°C), the filter system regenerates solely passively (catalytic filter coating). The injection of fuel is not necessary at that point. The filter will be charged with soot particles at lower load operation and the backpressure increases. At a specific backpressure level {e.g. 80mbars/free-adjustable), the ECU automatically activates the fuel injection and starts the filter regeneration. The pre-filter oxidizes the injected fuel catalytically and this reaction heat raises the exhaust gas temperature up to 500°C.
Advantage:
- Permanent regeneration from 230°C exhaust gas temperature
- Low backpressure / no increase in fuel consumption
- Perfect system for all low duty cycle operations
- Automatic controlled regeneration during operation
Cost benefits of optimally filter design
Cost benefits of optimally filter design
Maintaining the cleaning interval (service interval) clearly decreases the total cleaning cost. Negative consequences can include an increase in fuel consumption due to increase in backpressure. Total savings with PURItech DPF and PURIclean filter cleaning: up to £6700 (8000 Euro) per 250,000 km compared to the competition.
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