What is the SCR system on a Volvo truck?
What is the SCR system on a Volvo truck?
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. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF).
What does SCR system failure mean?
SCR means Selective Cataylst Reduction. This is the system that injects DEF fluid in the exhaust to reduce emissions. If there is a problem with this system, it will derate the engine if the problem does not get taken care of soon. Make sure your DEF tank has plenty of DEF in it.
What is a SCR Regen?
The SCR technology allows for passive regeneration. This occurs when the EGT at the DPF inlet and the NOx Ratio to soot ratio are high enough to oxidize the particulate matter. The process is slow and does not change the engine operation.
Can you clean an SCR?
Have an SCR that is plugged with Urea (DEF)? We’ve had several agriculture industry personnel ask if we can clean an SCR that has been plugged up with DEF (Urea). Yes, we can!
What is a SCR delete?
Mercedes SCR Delete (UREA Delete) means that you no longer will need to purchase DEF liquid agent to inject into the exhaust stream. So that is the best way for truck owners and operators to eliminate additional costs from diesel exhaust fluid.
Where is the def quality sensor located?
DEF tank
A DEF quality sensor is mounted on the side of the DEF tank. This sensor detects the Urea concentration in the DEF to confirm it is acceptable for effective dosing (approximately 32.5% Urea).
How many SCR engines does Cummins have?
Cummins has built and shipped over 50,000 SCR engines to date. Cummins Emission Solutions has built and shipped over 250,000 SCR systems. SCR Catalyst •Very high efficiency •Thermal stability Objective 1: Become familiar with DEF and SCR systems Cummins Filtration has offered DEF for stationary applications for over 5 years. SCR Catalyst
Can a SCR system be used on a diesel truck?
SCR systems can also be combined with a diesel particulate filter to achieve even greater emission reductions for PM. In the commercial trucking industry, some SCR-equipped truck operators are reporting fuel economy gains of 3-5 percent.
What are the emissions standards for Cummins engines?
Cummins has committed to providing a complete lineup of certified and compliant on-highway engine products that will meet the 2010 emissions standards. Objective 1: Become familiar with DEF and SCR systems For 2010, Cummins is enhancing the technology that it currently has in the marketplace.
When did Cummins start using selective catalytic reduction?
SCR technology is not new to Cummins or Cummins Filtration. In 2006, Cummins launched its midrange engines certified to the Euro 4 standard using SCR for commercial vehicle applications in Europe. SCR Catalyst •Very high efficiency •Thermal stability Objective 1: Become familiar with DEF and SCR systems
Cummins has built and shipped over 50,000 SCR engines to date. Cummins Emission Solutions has built and shipped over 250,000 SCR systems. SCR Catalyst •Very high efficiency •Thermal stability Objective 1: Become familiar with DEF and SCR systems Cummins Filtration has offered DEF for stationary applications for over 5 years. SCR Catalyst
SCR technology is not new to Cummins or Cummins Filtration. In 2006, Cummins launched its midrange engines certified to the Euro 4 standard using SCR for commercial vehicle applications in Europe. SCR Catalyst •Very high efficiency •Thermal stability Objective 1: Become familiar with DEF and SCR systems
Cummins has committed to providing a complete lineup of certified and compliant on-highway engine products that will meet the 2010 emissions standards. Objective 1: Become familiar with DEF and SCR systems For 2010, Cummins is enhancing the technology that it currently has in the marketplace.
What causes DTC on a Cummins ISX SCR?
For the SCR, it could be catalyst conversion efficiency… that DTC can be caused by a faulty nox sensor (and there should be such a code corresponding to it) or poor air intake. If you get a code of “SCR Mechanical Calibration Out of Adjustment” (or something like that..
