Geometry and Kinematics of a Convertible's Rear Side Window

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The design of rear side windows of convertibles (cabriolets) and their
motion while being retracted contains interesting geometric and kinematic issues.
On the one hand, the space between the door and the rear wheel arch is limited.
On the other hand, the window pane has to move through the sealing slit with
as little friction as possible. These turn out to be two severe constraints for the
window surface and its motion.
In order to allow for the crammed conditions we rst compute a spatial motion
that assumes prescribed positions and obeys certain side conditions. Having obtained
this spatial motion we can replace the given window surface by a kinematic
surface which perfectly moves through the sealing slit. Eventually, we construct
a set of possible window surfaces. This way the engineer gets a variety of options
to choose from.
Translated title of the contributionGeometrie und Kinematik der hinteren Seitenscheiben eines Cabrios
Original languageEnglish
Pages (from-to)101-114
Number of pages14
JournalJournal for geometry and graphics
Volume20
Issue number1
Publication statusPublished - Aug 2016

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Keywords

  • motion interpolation; motion design; kinematic surface; car window design

Cite this

Geometry and Kinematics of a Convertible's Rear Side Window. / Gfrerrer, Anton; Lang, Johann.

In: Journal for geometry and graphics, Vol. 20, No. 1, 08.2016, p. 101-114.

Research output: Contribution to journalArticleResearchpeer-review

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AB - The design of rear side windows of convertibles (cabriolets) and theirmotion while being retracted contains interesting geometric and kinematic issues.On the one hand, the space between the door and the rear wheel arch is limited.On the other hand, the window pane has to move through the sealing slit withas little friction as possible. These turn out to be two severe constraints for thewindow surface and its motion.In order to allow for the crammed conditions we rst compute a spatial motionthat assumes prescribed positions and obeys certain side conditions. Having obtainedthis spatial motion we can replace the given window surface by a kinematicsurface which perfectly moves through the sealing slit. Eventually, we constructa set of possible window surfaces. This way the engineer gets a variety of optionsto choose from.

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