is the name given to an EDP-aided
literature data base for
valve timing systems.
other measures exert such an influence on future engine
design ratings as the ability to vary the valve timing while
the engine is in operation. Such is the volume and variety
of variable valve timing systems that a comprehensive central
data base is needed to make an overview possible and for
consultation in the course of research work.
The development engineer or patent agent is
often faced with the question as to whether a new idea is
in fact already known, or wishes to confirm the potential
for protecting a new invention. In order to provide a more
satisfactory answer to such questions, some 4,000 patents
and about 1,000 other publications on the subject of variable
valve timing have been collected together in a central EDP-aided
data base. All the entries are classified according to the
nature of the variable valve timing principle. This material
provides potential for a range of services aimed at answering
questions and solving problems in the field of variable
Suggestions for the effective management of this internet
homepage are most welcome.