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Exhaust Gas Aftertreatment for Lean Gasoline Direct Injection Engines - Potential for Future Applications
Technical Paper
2013-01-1299
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Future emission standards will require further reduction of
harmful gaseous emissions such as HC, CO and NOx as well as
consideration for greenhouse gas emissions such as CO₂. Gasoline
engines with lean combustion spray-guided direct fuel injection in
conjunction with turbocharging have a very high potential for fuel
savings. The main challenge for stratified lean GDI aftertreatment
systems is the development of a catalyst system to fulfill the
emission legislation requirements under low exhaust temperature
operating conditions with efficient use of precious metals. In
addition to the very stringent emission legislation another
challenge for the introduction of lean gasoline engines in North
America is the higher sulfur content of the fuel compared to
Europe.
In this paper exhaust gas aftertreatment requirements for
stratified gasoline direct injection engines will be discussed and
the latest advances in catalyst and system development will be
shown. With a newly developed three-way nitrogen oxide storage
catalyst (TWNSC) mounted close-coupled to the engine and an
improved NOx storage catalyst in the underfloor of the vehicle, the
operating range for lean combustion can be significantly increased
and further potential for minimizing CO₂ emissions can be realized.
This new concept provides the basis for exhaust gas aftertreatment
with substantially improved efficiency in vehicles with gasoline
engines operated with a lean fuel mixture.
Recommended Content
Authors
- Susanne Philipp - Umicore AG & Co. KG, Hanau, Germany
- Ruediger Hoyer - Umicore AG & Co. KG, Hanau, Germany
- Frank Adam - Umicore AG & Co. KG, Hanau, Germany
- Stephan Eckhoff - Umicore AG & Co. KG, Hanau, Germany
- Rolf Wunsch - Daimler AG, Sindelfingen, Germany
- Christof Schoen - Daimler AG, Sindelfingen, Germany
- Guido Vent - Daimler AG, Sindelfingen, Germany
Topic
Citation
Philipp, S., Hoyer, R., Adam, F., Eckhoff, S. et al., "Exhaust Gas Aftertreatment for Lean Gasoline Direct Injection Engines - Potential for Future Applications," SAE Technical Paper 2013-01-1299, 2013, https://doi.org/10.4271/2013-01-1299.Also In
References
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