ENDRESS Power generator aggregates catalogue Page 14
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Soot particulate filter Function description In an SMF® AR System the exhaust gas is filtered until the optimum amount of soot has been gathered on the filter for regeneration. The system uses the positive active properties of a fuel additive so that on the one hand, it lowers the soot ignition temperature and, on the other hand, it increases the soot combustion speed. The stored soot can then be burnt off by itself at an exhaust gas temperature of about 400°C during a regeneration. If the required temperature is not reached, which is often the case in the low load range, then active regeneration support will be provided by the system's thermo-electric heating. Generator speed signal Optional: Display module Indicator with a diagnostics light connection Differential pressure sensor Sintered metal filter (SMF®) Ground Optional: Air flow meter Diesel engine Diagnosis Warning buzzer Temperature sensor Pressure measuring point upstream of the filter Fuel tank fuel level sensor Sintered metal filter (SMF®) Fuses Dosing pump Additive filter Oxidation catalytic convertor module Heating elements Pressure measuring point downstream of the filter Measuring and control lines Additive tank Differential pressure lines Electronic Control Unit (ECU) Additive line Power supply SMF® - module 4 Inlet module Active thermo-electric regeneration The control unit initiates (active) regeneration through the heating elements that are arranged in a circle. The gathered soot is ignited by the radiation energy of the heating elements. The regeneration process proceeds automatically after initial ignition of the soot layer. The soot burning takes place at regular intervals. With the aid of the control unit, not only ignition of the soot is initiated but also the additive is added in an optimal manner, the required filter loading is determined and the most favourable point in time for regeneration is determined. Furthermore, self-learning running cycle recognition ensures that the regeneration is triggered for optimum operating conditions. Due to the high soot storage capacity of the SMF® AR system, the regeneration does not occur just at one “unique", ideal point in time, but rather within a long time window. Therefore a one-time abort of regeneration due to switching off of the engine is not a problem with regard to safe working of the SMF® AR system. Another SMF® plus point is its high ash storage capacity, which allows long maintenance or cleaning intervals. 14 Outlet module SMF® AR – An overview of the advantages • For OE and retrofitting applications • Reduction of soot and fine particles by more than 99% (based on the number of particles) • Particularly suitable for low temperature applications • Fully automatic, active regeneration • Robust design due to the use of sintered metal (SMF®) => suitable for construction machines • Operationally safe function • Low maintenance • Long service life • NO2 - neutral regeneration • Easy cleaning of the filter with a high pressure cleaner
76 Pages | Valid until 12/2023 | Previous page | Next page
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