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4.3.3.2 SCR catalytic converter – Overview
1 Jacketed SCR system
2 RA dosing units
3 Exhaust outlet from SCR
system
All the housing components of the SCR system which might come into contact with reducing agent or ammo-
nia are made of stainless steel. The SCR systems are jacketed and include insulation to minimize heat loss
and moderate the surface temperature to approx. 200 °C.
The DCMs, supply and dosing units (SU/DU), RA lines, exhaust sensors and electrical wiring harness are pre-
installed on delivery of the SCR system.
As the exhaust gas aftertreatment system fulfills the function of an exhaust silencer, no additional mounting
space is required in many cases.
Technology
• SCR catalytic converter
• Ammonia slip catalyst (ASC)
• Dosing system
• Integrated mixing channel
• Jacketed SCR systems with insulation
4 DCM exhaust gas aftertreat-
ment system
5 Externally mounted compo-
nents
6 Wiring harness
MS15065/01E 2019-01 | SCR System | 77
7 Exhaust inlet to SCR system
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