Can a SCR filter be cleaned?
In these cases, diesel engines will start producing more harmful, smelly emissions and will also decline in terms of fuel economy. A clogged SCR, in other words, is a pretty big problem. In other words, we can usually clean your filters and return them to effective service, meaning that no replacement is necessary.
What is SCR filter?
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. It is called “selective” because it reduces levels of NOx using ammonia as a reductant within a catalyst system.
How does a SCR catalyst work?
Selective Catalytic Reduction (SCR) is a proven and advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream.
How would you know if the SCR is open?
If the multimeter indicates continuity through the SCR before the gate is touched to the anode, it indicates that the SCR is shorted. If the multimeter will not indicate continuity through the SCR after the gate has been touched to the anode, it indicates that the SCR is open.
How is SCR used in the exhaust stream?
The chemical reaction is known as “reduction” where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream. SCR technology alone can achieve NOx reductions up to 90 percent.
How does SCR work in a diesel engine?
The Diesel Exhaust Fluid sets off a chemical reaction which converts the NOx into Nitrogen, water and very small amounts of CO2. SCR technology can achieve up to 90% NOx reduction.
How does Selective Catalytic Reduction ( SCR ) work?
What Is SCR? Selective Catalytic Reduction (SCR) is a proven and advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF).
Why does the SCR filter need to be maintained?
This fluid contributes to the further break down of nitrogen oxides that pass through to the SCR filter. Typically the SCR filter doesn’t need maintenance except in rare events where a component related to the DEF fluid fails. At the heart of these components is an ultra-fine filter in which to capture microscopic particulates.