Is the NOX deficiency light coming on?
Or maybe your big rig continuously goes into limp mode.
It is critical that we keep trucks on the road rolling. There are many reasons your engine might be needing attention.
The SCR catalyst is designed to take in NOx (nitrogen oxides) with the use of DEF and convert it to water vapor and nitrogen gas. When the SCR gets plugged up with crystalized DEF or other contaminates it will cause warning signs and it is time for cleaning.
To keep your SCR running smoothly, it needs to have a sufficient supply of Diesel Exhaust Fluid (DEF). The catalyst must have enough DEF, or it is at risk of being ruined.
Diesel exhaust fluid is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is not a fuel additive and does not come in contact with diesel. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water.
The DEF fluid is sprayed through the SCR to react with the particulate matter in the filter. It needs to be mixed thoroughly with the exhaust gasses to achieve high NOx to nitrogen conversion. Ammonia in the catalyst is a reactant that allows cleaner exhaust to come out of the tailpipe. This is known as reduction, so the DEF reacts with the NOx to convert the pollutants into water, nitrogen and small particles of CO2. SCR systems can reduce the NOx emissions from 50-90%, depending on the filter.
First, your filter is blown out to remove any loose debris. The flush and kiln process thoroughly cleans out any crystalized DEF or other detritus.
The EGR or Exhaust Gas Recirculation is within diesel engines to reduce the release of nitrogen oxides. It works with a cooling double walled cooling chamber and a EGR valve to pump exhaust gas with high NOx levels back into the engine to combust and lower the flame temperature in the cylinder. If it is clogged, the exhaust won’t be able to travel back into the engine causing back pressure. The valve can either get stuck open or closed as well. If the valve gets stuck open, it can allow a continuous flow of gasses into the engine which will interrupt the combustion process. If the valve gets stuck closed, the fuel ignites before combustion.
The test & clean process involves high pressure air as well as soaking the filter. In addition, you get a kilning process as well. You can get all types of EGR systems cleaned.
And you can choose the length of your guarantee for any filter you clean at Lynx Emissions.
Getting DEF into the fuel tank can be thousands of dollars to repair and getting diesel into the DEF tank will also be an expensive fix but not as much as DEF into the fuel tank.
Ever run into the issue of coolant that has leaked into the DPF which has caused cracking and fouling of the DOC (diesel oxidation catalyst)? This will eventually lead to an engine failure.
One of the more common problems a fleet may encounter is face plugging of the diesel oxidation catalyst (DOC). Black deposits form when unburnt fuel is collected on the front end of the catalyst. This increases backpressure on the engine and requires exhaust gases to funnel through a smaller area than intended. As a result, the exhaust gas travels through the oxidation catalyst too quickly for processing and travels through to the particulate filter, which can become plugged prematurely. This has a domino effect which eventually lead to the failure of other components.
If the filter isn’t properly cleaned, leftover ash can compete with soot for space, causing the DPF to overheat and potentially causing the substrate to crack. This will allow unfiltered exhaust gas to pass through to the SCR catalyst.
The results can include a poisoned catalyst and cracked DPF, both expensive problems to repair.
One Boxes can be successfully cleaned at Lynx Emissions. Disassembly and reassembly is also available for you – contact your nearest branch today and ask about a complimentary pick up.
Transporting goods across the country isn’t cheap, and at Lynx Emissions you can get complimentary preventative maintenance schedules to keep your diesel engine in working order. Investing in preventative maintenance is the best way to keep a minor issue from becoming a major problem.
You only pay when it passes at Lynx Emissions. Call or chat with us today to ask about your complimentary pickup.
