What is the difference between EGR and SCR?
EGR also increases ash and soot in the oil. With SCR or Selective Catalytic Reduction, the nitrogen oxide (NOx) reduction process takes place after combustion – so as to not diminish engine performance. The bottom line with EGR is it adds cost, complexity, hotter running performance and increased engine noise.
Which is better SCR or EGR?
SCR is more effective for long wheel base applications. EGR is more effective in low power engine application & not recommended to heavy duty application engines due to its contamination effects. EGR technique alone cannot meet the Bharat Stage-VI level NOx emissions due to limitation on % of EGR.
When did international start using SCR?
By Brand. SCR technology was first adopted in an automotive application in 2004 by Nissan Diesel. Since that time SCR technology has been implemented worldwide. Diesel exhaust fluid (DEF) is the principal catalyst utilized in SCR systems.
What is SCR valve?
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.
Why is EGR required?
Abstract: Exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines. The EGR reduces NOx through lowering the oxygen concentration in the combustion chamber, as well as through heat absorption.
How is Navistar solved its EGR problems-truck news?
Navistar is so confident with the fix, it offers a one-year, 100,000-mile warranty on used trucks that have been reconditioned through its Diamond Renewed program. by James Menzies@JamesMenzies James Menzies is editor of Today’s Trucking. He has been covering the Canadian trucking industry for more than 18 years and holds a CDL.
What kind of engine does a Navistar 11L have?
Actually, the 11L and 13L maxxforce engines were Mann Diesels with Navistar emissions technology killing them (advanced egr over scr). The 15L at this same time was a C15 with the same Navistar bull on it.
How does the ECM work on a Navistar truck?
The ECM, very importantly, would dictate via that connection how much fresh air should be supplied to the engine and for how long, as well as how much hot exhaust should be supplied and for how long, to effectively reduce emissions. However, constant vibration and wind underneath the hood would cause the connection to become loose.
Can you change EGR valve on Cummins ISX cm 2350?
That was only a few of the many failures on these engines. The main failure on the Maxxforce 13 was and still is “Serviceabilty”. You can change a EGR valve on a Cummins ISX CM 2350 in the same amount of time it takes to remove and install the seats when changing a EGR valve on a Maxxforce 13.