Exhaust Aftertreatment, Function; New Diesel Engine Generation; The Emissions Standard Euro V, Eev - Mercedes-Benz OM 471 Introduction Into Service Manual

Functions
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ENGINES 471.9 in MODEL 963 with CODE (M5Y) Engine version Euro V
ENGINES 471.9 in MODEL 963 with CODE (M5R) Engine version EEV
General information
The EATS to comply with the emissions standards Euro V or EEV
based on new engine technology in combination with a range of
measures to reduce the emissions in exhaust.

The emissions standard Euro V, EEV

Emissions standard are legal guidelines which serve to subdivide
vehicles into certain emissions classes. These emissions classes are
assigned to certain emission>code>numbers
which serve, amongst other things, to compute the vehicle tax
and classification in emission groups for environmental zones.
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EATS for Euro V, EEV

New diesel engine generation

The new engine generation is fitted with a common rail diesel
injection system, EGR and boost pressure control. The engines
themselves are set to maximum efficiency and low particulate
emissions.
Networking of control units
A3 Drive control (CPC) control unit
A4 Engine management control unit
(MCM)
A57 NOx sensor control unit outlet of
EATU
A58 SCR control unit (in pump module)
A60 Exhaust aftertreatment (ACM)
control unit
A70 NOx sensor control unit inlet of EATU
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Exhaust aftertreatment, function

– This printout will not be recorded by the update service. Status: 09 / 2011 –
The emissions standards Euro V and EEV for commercial vehicles
establish very strict limits for output of carbon monoxide (CO),
nitrogen oxide (NOx), hydrocarbons (HC) and particles (PM).
As a vehicle manufacturer Mercedes>Benz must guarantee
compliance with these limits for an established time period and
mileage. Therefore the EATS is a component of engine/vehicle
homologation subject to compulsory certification.
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Exhaust aftertreatment by means of:
f Selective Catalytic Reduction (SCR) with an ammonia locking
CAT
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