Abstract
Door glass position errors that occur when an automobile door glass goes up and down not only reduce the basic performance of the door glass in terms of sound- and water-proofing, but also decrease the life span of the glass run and belt. Thus, there is a need for understanding the dynamic behavior of a door glass in order to reduce these errors. In this research, we analyzed the door glass behavior by developing a dynamic numerical analysis model for a single rail regulator type of door glass lifting system. We modeled the glass run and belt lip load as a non-linear spring-damper system to reflect changes in the lip load caused by door glass position errors in the analysis. We also introduced local coordinate systems to find door glass position errors during the lifting process. By using our model, the time spent on the up and down motions, the current, and the lifting resistance could be predicted with 4 %, 11 %, 3 % and 4 % of error, respectively, comparing with the test data. We confirmed the effects of imbalances and boundary conditions in the load and moment which occur during the door glass lifting process. We also found that the lip reaction force, coefficient of friction, overlap length and position of the lift line cause door glass position errors.
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Lee, CR., Jeong, HY. Numerical modeling and dynamic simulation of automotive power window system with a single regulator. Int.J Automot. Technol. 18, 833–849 (2017). https://doi.org/10.1007/s12239-017-0082-9
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DOI: https://doi.org/10.1007/s12239-017-0082-9