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Influence of the engine oil on gas consumption. The measurement
was taken on the engine test stand in Darmstadt, and a
standardized reference oil (RL 191) was used for comparison.
Compared to PAMA, oils with comb polymers can reduce
gas consumption by another 0.9 percent
Comb PAMA
Advantage vs. RL191 [%]
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4.4
3.5
20 grams by the year 2015—and the new comb polymers
can eliminate up to 2.5 of those grams.
This shows how the chemists at the Oil Addi tives
Business Line are translating the ideas and wishes of
engine developers and lubricant manufacturers into
a chem ical structure of the required additives. They
act as mediator between the growing technical challenges
of engines and drive trains, and the practical
experience of lubricant manufacturers. This requires
close cooperation with formulators in setting the very
specific properties of the lubricant and a continuous
exchange with customers and suppliers.
Every engine in the world is the same in this way:
They all have to run, and run as long and as troublefree
as possible. But this alone is not enough anymore.
Traffic is increasing dramatically worldwide, and is
considered the problem child of climate policy because,
thus far, it has been unable to noticeably curb
traffic-related greenhouse gas emissions.
This is why future vehicles will also be assessed
based on whether engineers and suppliers have
exhausted all potential for the lowest possible fuel
consumption and low emissions. Against this backdrop,
chemically custom-designed additives can help
ensure that advanced engines not only function
optimally but also consume as little fuel as possible.
Doing so is not only in the interest of the driver but
also car manufacturers, engine developers, and the
oil industry—all of whom must ensure that, in the
future, vehicles offer substantially lower emission
levels and greater environmental compatibility. Only
then will traditional drive technologies continue to
be relevant. 777
Influence of the gear oil on gas consumption, measured as torque
loss on the drive shaft. Here, too, comb polymers can help reduce
gas consumption by another 0.5 percent compared to PAMA
PAMA: 20 °C; 44 °C; efficiency = 95.2%
Comb: 20 °C; 44 °C; efficiency = 95.7%
Torque loss [Nm]
5
4
3
2
●
●
●
●
DesIGnInG WItH PoLYMeRs 13
1
0 25 50
75 100 125 150
Applied torque [Nm]
Boris eisenberg joined Evonik‘s Oil Additives
Business Line in 1995, and currently works in product
development in the Innovation Management unit.
Since 2008, he has been responsible for product development
with a focus on defined polymer architecture.
Eisenberg holds a degree in chemical engineering from
the University of Darmstadt (Germany) and is author
of more than 20 patents and scientific publications.
+49 6151 18-3028, boris.eisenberg@evonik.com
Dr. torsten stöhr studied chemistry with a focus on
polymer science at Johannes-Gutenberg University
Mainz (Germany) and the University of Massachusetts
at Amherst (United States). He earned his PhD at the
Max Planck Institute for Polymer Research in Mainz, at
IBM Almaden Research Center in San Jose (California,
USA), and at Stanford University in Palo Alto (California).
He joined Evonik Industries in 2000, and came to
the Oil Additives Business Line in 2002, where he
worked on defined polymer architectures. Since 2008,
he has been in charge of global product devel opment
of all viscosity index improvers and pour point depressants
of the business line.
+49 6151 18-4743, torsten.stoehr@evonik.com
Dr. Michael Müller is responsible for strategic marketing
in the Oil Additives Business Line. After studying
chemistry at the University of Freiburg and earning
his doctorate there at the Institute for Macro molecular
Chemistry in the working group of Prof. Gerhard
Wegner, Müller started his career in 1984 at Evonik
Röhm GmbH. He held different positions in research,
application engineering and technical service in the
Acrylic Polymers and Oil Additives Busi ness Lines, including
most recently Global Business Man ager Engine
Oil and Driveline for Oil Additives, before moving to
his current position.
+49 6151 18-4573, michael.mueller.mm@evonik.com
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elements35 Issue 2|2011