Stefan Zima studied mechanical engineering at the
Technical University of Berlin (majoring in engines and machines).
He came into contact with high-speed, heavy-duty engines for
special applications when, after obtaining his intermediate diploma
with Deutsche Bundesbahn [German Federal Railways], he underwent
training to become an engine driver on diesel locomotives of the V
60, V 1002, V 160, and V 2001 series. After his examination in
humanistic, in 1967 he gained his full diploma with a thesis on
experimental investigations into a heat-transfer problem.
Subsequently, Zima worked as assistant engineer on merchant-navy
ships, where he acquired a thorough knowledge of the operation,
maintenance, and repair of marine propulsion systems, including
those powered by high-speed engines. From 1968 to 1977, DiplIng.
Stefan Zima worked in the R&D division of Maybach-Mercedes-Benz
Motorenbau (now: MTU Friedrichshafen GmbH), and was last employed
as deputy head of a design department. In 1977 he joined the
Giessen-Friedberg University for Applied Sciences as a lecturer in
piston engines and head of the IC laboratory. He was appointed
professor in 1979. Also during his service as a university
lecturer, Zima maintained contact with the everyday world of engine
technology in a variety of ways, e.g., by trips on motor ships or
by driver training and testing on tracked vehicles (Leopard 1 A 4
combat tank). In 1985 he was awarded his doctorate in engineering
from the Technical University of Berlin with a thesis on “The
Development of High-Speed Heavy-Duty Engines in Friedrichshafen”
(VDI-Verlag, Düsseldorf, 1987). He published a number of books on
internal combustion engines, e. g., Hochleistungsmotoren. Karl
Maybach und sein Werk, [Heavy-Duty Engines. Karl Maybach and His
Work], VDI-Verlag, Düsseldorf, 1992 and 1995 (co-author);
Kurbeltriebe, [Development of the Crank Assembly], Vieweg-Verlag,
Wiesbaden, 1999; and Ungewöhnliche Motorkonstruktionen [Unusual
Engine Designs], Vogel-Verlag, Würzburg, 2003. Dr. Zima
unexpectedly passed away in April 2004.
After graduation from high school, Ernst Greuter
completed training as a motor vehicle mechanic. After passing his
journeyman and master’s exams, he attended engineering school. In
1950, he joined his father’s business, “Motoren-Greuter,” an engine
overhaul shop located in Saarbrücken, Germany. In that same year,
he set up a small subsidiary in Algiers, Algeria, specialising in
cylinder boring and crankshaft grinding, with a small sales office.
In 1951 he established additional engine overhaul branches in
Idar-Oberstein and Mainz, Germany. In 1952 and 1953, Greuter served
as an engineer trainee with several vehicle and engine component
manufacturers in Germany and abroad. In 1955, he was given overall
technical responsibility for all of the family firm’s engine
overhaul facilities. Also beginning in 1955, Greuter worked as a
combustion engines consultant (gasoline and diesel). He
participated in research, development, and material testing
activities with various engine component manufacturers in Germany
and abroad. Greuter conducted tests of new designs and materials on
diesel and gasoline engine test stands. In 1964, he established
additional subsidiaries in Central and South America, and began
license manufacture of ocean-going diesel engines and manufacture
of exchange engines. In addition to his work as technical director
and managing director of “Motoren-Greuter” GmbH, beginning in 1975
Greuter operated an engineering and consulting office which
specialised in planning and establishing engine repair facilities,
exchange engine manufacturing, and production of engine components
in Germany and overseas. Additional specialities included personnel
training, and combustion engine seminars for the motor vehicle
repair trade and for engine specialists. Periodically Greuter
served as a visiting instructor at various educational facilities
overseas. From 1987 to 1997, he had an independent consulting
service, specialising in combustion engines, engine overhaul, and
the outfitting of engine and motor vehicle repair facilities.
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