Range extenders can extend the driving range for an electric vehicle ...

innovation
Emitec and its associates have developed SCRi - a compact
exhaust gas treatment system to cut emissions below particulate
matter and nitrogen oxide limits in direct-injection diesel and petrol
engines. The application of SCR technology and selective catalytic
reduction cuts NOx levels by over 90% and particulate emissions
by over 80%. These figures can be substantially increased through
the use of larger components. Emitec’s modular concept also
makes SCRi suitable for retrofitting.
Emitec says its pre-turbocharger catalysts for all types of
engines provide higher temperature levels than other catalysts
Reducing space
and emissions
By: Lenny Case
German company, Emitec Gesellschaft für Emissionstechnologie is a global leader in the metal substrate market for vehicle
exhaust gas catalysts and diesel particulate filters. Its turbulent catalysts and particulate filters are highly efficient,
require little space and are ideally suited to meet future emission limits.
“
Driven by an ever increasing
demand for lower emissions,
we see the Selective
Catalytic Reaction (SCR)
systems for diesel engines
as one of the most
challenging developments in
Europe and the U.S.
”
Claus Bruestle, president of North
American operations at Emitec Inc.
SCR with integrated particulate reduction and
hydrolysis functionality.
and improve the HC/CO light-off behavior of the overall system.
Despite their small size, they are able to reduce carbon monoxide
emissions by up to 50%. Cost savings are considerable as these
catalysts cut the amount of precious metals in the downstream
oxidation catalyst.
For diesel engines and future petrol engines, the PM-METALIT
soot filter has huge potential. In contrast to wall-flow filters, a PM-
METALIT filters particulates using partial-flow deep-bed technology
and does not block if properly installed. It therefore ensures
efficient and unrestricted engine operation under any operating
conditions.
Automotive Industries spoke to Claus
Bruestle, president of North American
operations at Emitec, and asked him
about the latest developments in
emission control solutions.
Bruestle: Driven by an ever
increasing demand for lower emissions,
we see the Selective Catalytic Reaction
(SCR) systems for diesel engines as one
of the most challenging developments
in Europe and the U.S. EPA regulations
for 2010 require NOx levels of 0.2 g/hp/h,
thus forcing the engine and aftertreatment
industry into the adoption of complex
aqueous urea storage and injection systems,
electronic controls and reliable NOx conversion
within the catalytic converters.
At the same time, high exhaust gas recirculation (EGR)
systems are developed as complimentary solutions or, in some
cases, sole solutions in order to maximize fuel economy and
minimize engine emissions. On the engine side, huge efforts are
being undertaken to increase injection pressures to 3000 bar
and above to reduce raw emissions and offer the best starting
conditions for fuel economy and the NOx and PM trade off.
Particulate count regulation in Europe, which is expected to take
place in 2013, will create even more challenges for aftertreatment
technologies.
AI: What are some of Emitec’s catalytic solutions for OEM
gasoline and diesel applications?
Bruestle: Our perforated foil technology (PE) is very suitable
for gasoline engines. This design allows cross flow inside the
catalytic converter from one channel to the other.
With the spread of downsized direct injection turbocharged
gasoline engines, the diesel and gasoline exhaust gas aftertreatment
requirements will become very similar. The particulate emissions
28 to read full version of AI stories go to www.ai-online.com