powertrain engineering
3 0
2 0 1 9
TACKLING
EMISSIONS TARGETS
WITH COMBINED
KNOW-HOW
The automotive industry is evolving, driven by increasingly stringent
regulations for pollutant emissions and CO2 reduction. Especially in Europe,
the enforcement of RDE methods to reduce pollutant emissions and
the switch from NEDC (New European Driving Cycle) to WLTP (Worldwide
harmonized Light vehicles Test Procedures) for CO2 reduction are
posing new challenges for OEMs.
Furthermore, since the ‘Dieselgate’ emissions scandal, public awareness
has been increasingly focused on this area. The result is that – particularly
in Europe – the discussion has gone from being technical and fact-based
to become a predominantly political and overarchingly emotional debate.
As a consequence, for carmakers it is not enough to simply fulfil emission regulations
and regulative norms. Public expectations demand ultra-low pollutant
emissions and low environmental impact over the complete vehicle lifetime,
and so OEMs are forced to react and
take massive action to prove stable
cleanliness. Therefore, maximizing
emission robustness in-field is more
important than ever before.
In order to develop appropriate
emission compliance in a cost-efficient
and focused way, methods are
required that secure and ensure robustness
of the fleet, starting in the
development phase. The goal is to
combine real vehicle usage profiles
within varying environmental conditions,
include component tolerances
and component aging, and to consider
all of these factors in the development
process. “Normally with new
components it’s comparably easy to
meet targets, but with aged components
their behavior becomes much
harder to predict,” explain Bernhard
Enzi, Senior Product Manager, Passenger
Cars / LCV and Christian
Martin, Product Manager, Passenger
Cars / LCV.
Legal requirements have to be defined
at the very start of the process.
This occurs within the documentation
of the overall emission
concept – e.g. AES (Auxiliary Emission
Strategies)/BES (Base Emission
Strategies) documentation in Europe
or AECD (Auxiliary Emission Control
Device) documentation in U.S.
A unified approach to in-field emission compliance
and robustness.