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PRESSURIZED SEALING SYSTEM FOR SIDE DOORS OF PASSENGER VEHICLES

IP.com Disclosure Number: IPCOM000243595D
Publication Date: 2015-Oct-05
Document File: 1 page(s) / 191K

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The IP.com Prior Art Database

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PRESSURIZED SEALING SYSTEM FOR SIDE DOORS OF PASSENGER VEHICLES

Dynamic sealing performance is a trade-off between NVH (Noise, Vibration and Harshness) and DCE (Door Closing Effort) requirements. Nominal seal load is defined to achieve a balance between these attributes. When considering process variations at seal production (seal load) and vehicle body construction (seal gap, which affects seal load), the upper limits of load range will negatively affect DCE, as the lower limits will affect NVH.

A new design concept is proposed to address the trade-off between NVH and DCE, by adding air pressure inside the seal bulbs when the doors are closed, so to avoid the negative impact of the load variations.

Typical cross section at rocker area Air System

A typical sealing system is composed by a primary seal door mounted (1) and a secondary seal body mounted (2). These seals perform their function at the environment called seal gap, defined by the interface between door inner panel (3) and body side outer (4). The solution proposed is to add pressure inside the seal bulbs (+), provided by an air system composed by compressor (5), air tank (6), valves (7) and connectors (8).

To reduce DCE, the seal can be designed with very low nominal load. Once the doors are closed, the air system takes action and inflates the seals, applying pressure against the door and body side panels, thus improving NVH performance. Sealing performance against water and dust are other improvements...