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A multiple stage pressure based device to sense and classify pedestrian impacts and crash events integrated with active-wheel deflector Disclosure Number: IPCOM000239273D
Publication Date: 2014-Oct-24
Document File: 4 page(s) / 612K

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The Prior Art Database

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Page 01 of 4

A multiple stage pressure based device to sense and classify pedestrian impacts and crash events integrated with active-wheel deflector

Sensing Pedestrian impacts, predicting crash events, ability to differentiate and classify events severities within first few milliseconds are, in general, challenges and critical for vehicle safety performance. Also, there are sometimes difficulties in packaging and mounting pedestrian protection sensors on front fascia that might reduce the ability of utilizing some of the available sensing technology.

Small Offset Rigid Barrier (SORB) crash test is one of the latest stringent impact modes that IIHS required. Achieving good rates on this mode requires additional structures, restraint devices or design changes for most of the current programs. Also, data showed that wheel rotation during offset tests, especially SORB, and its engagement with the vehicle body might have effect on the test results.

Description of the Invention

This concept is a combination of mechanical and electrical systems. It utilizes the fluid dynamics to predict the frontal impact early in the crash event and exploits the solid mechanics of the system to deflect the impacted vehicle laterally and rotate the wheel during frontal offset impacts.

The mechanical and electrical parts of the design can be summarized as follow:

Mechanical Part: It consists of a device with a defined shape, as shown in the attached illustrations, or other shapes that can lead to similar functionality. This devise or chamber has, stage1, upstream pocket (tip-ball, tube, or any cavity shape) attached to the back surface of the front fascia. It can be used to sense pedestrian and abuse impacts and provides early information to support collision predictions.

Material of this section should be soft to discriminate leg impacts and other pedestrian events from abuse impact
stage2, mid-chamber, that is extended and mounted outside the front rail. It will be used to generate a second pressure wave that can predict the crash severities.

Page 02 of 4

The tapered shape is proposed to create lateral forces on the rail and assure axial folding of the stack, which will be used, in addition to stage3, as a mechanical mechanism to push the wheel outboard.

Material of this section could be steel with crash initiators, so it can be deformed without affecting other existing designed rails; however, for more effectiveness, it can be...