An Update on the IIHS Small Overlap Research Program

Transcription

1 An Update on the IIHS Small Overlap Research Program 2012 Government/Industry Meeting Washington, DC January 25, 2012 Chris Sherwood Senior Research Engineer

2 116 real world frontal crashes with serious injuries in IIHS good-rated vehicles Full Width override 2% low severity 11% center 19% Moderate Overlap Small Overlap Center Impact underride 14% full width 6% moderate overlap 24% small overlap 24% Brumbelow and Zuby, 2009

3 Definition of small overlap Majority of loading outside longitudinal structures Longitudinal largely undamaged

4 Real world small overlap crashes (ESV 2009) Crash configuration tree/post/pole passenger vehicle head-on oblique head-on Pole/Fixed Object crashes Vehicle-to-Vehicle Oblique crashes Vehicle-to-Vehicle Collinear crashes

5 Crash tests of three small overlap crash configurations

6 Wheel engagement differences Pole Collinear Oblique

7 Additional barrier designs flat barrier with 50 mm radius, 20% overlap flat barrier with 150 mm radius, 25% overlap 250 mm radius pole, 25% overlap Offset deformable barrier, 20% overlap Flat 50 Flat 150 Pole 250 ODB

8 Barrier performance

9 45 small overlap crash tests performed Focus on results from 16 test matrix Vehicle Collinear ODB Pole 250 Flat 150 Flat 50 Oblique Fusion X X X X X X Galant X X X X X X S60 X X X X

10 Vehicle Dynamics

11 Pole 250 Collinear Flat 150 Flat 50 ODB Results representative of all vehicles

12 Relationship between vehicle dynamics and occupant kinematics Fusion ODB Vehicle lateral motion low Fusion Collinear Vehicle lateral motion - high

13 Relationship between vehicle dynamics and occupant kinematics Fusion ODB Vehicle lateral motion low Fusion Collinear Vehicle lateral motion - high Head remains engaged with airbag More outboard head contact, slides off of airbag

14 Injury measures

15 Pole 250 ODB Collinear Flat 50 Flat 150 Oblique Head Neck Fusion Galant S60 Fusion Galant S60 Fusion Galant S60 Fusion Galant S60 Fusion Galant S60 Fusion Galant S60 G G na G G G G G G G G G G G G G G na Chest G G na G G G G G G G G G G G G G G na Left Leg Right Leg G G na G G G G A G M G G P A G P P na G G na G G G G A G G G G G G G M P na High injury measures limited to lower extremities Highest measures in Oblique, followed by Flat 150 Fusion and Galant similar values S60 only Good ratings

16 Restraints & Kinematics

17 Head remains fully engaged with airbag Head slides off airbag and has additional forward excursion No contact between head and airbag

18 Fusion Flat 150 Complete miss of airbag

19 Fusion Galant S60 ODB Fully Engaged Fully Engaged Fully Engaged Collinear Slide off early Slide off late Fully Engaged Flat 50 Slide off early Fully Engaged Fully Engaged Pole 250 Complete Miss Slide off Early na Flat 150 Complete Miss Slide off early Fully Engaged

20 Structure

21 Intrusion measurement locations Upper Dash Hinge Pillar Upper Hinge Pillar Lower Rocker Lateral 1 Footrest Left Instrument Panel Rocker Lateral 2

22 Hinge Pillar Upper Hinge Pillar Lower

23 Lateral intrusion of rocker Overhead view of hinge pillar and rocker panel

24 Intrusion of upper dash Overhead view of vehicle Upper Dash

25 Average intrusion by crash configuration Hinge pillar (2), upper dash, rocker panel (2), instrument panel, footrest Trends of intrusion consistent for all configurations Fusion > Galant > S60

26 Vehicle deformation and load path Load paths similar across all crash configurations Miss rail, wheel loads hinge pillar and rocker, shock tower loading

27 Summary

28 Research questions What are differences/similarities among crash configurations? Will countermeasures benefit each crash type? Are there different levels of performance in fleet?

29 Research questions What are differences/similarities among crash configurations? Load paths and deformation patterns similar across all configurations Magnitude related to Delta V

30 Research questions Will countermeasures benefit each crash type? Are there different levels of performance in the fleet? Same trend (Fusion Galant S60) for Injury measures and Restraints & Kinematics

31 Most Severe Least Severe Vehicle Lateral Motion Injury Severity Restraints & Kinematics Structure Oblique Oblique Oblique Flat 50 Pole 250 Flat 150 Flat 150 Oblique Collinear Pole 250 Flat 150 Flat 150 Flat 50 Flat 50 Collinear Collinear ODB Flat 50 Pole 250 ODB Pole 250 ODB Collinear ODB

32 Most Severe Least Severe Vehicle Lateral Motion Injury Severity Restraints & Kinematics Structure Oblique Oblique Oblique Flat 50 Pole 250 Flat 150 Flat 150 Oblique Collinear Pole 250 Flat 150 Flat 150 Flat 50 Flat 50 Collinear Collinear ODB Flat 50 Pole 250 ODB Pole 250 ODB Collinear ODB

33 Small overlap crashworthiness evaluation test Rigid barrier, flat face, 150mm corner radius 25% overlap 64 km/h test speed Hybrid III midsize male driver THOR could be adopted in the future

34 Small overlap crashworthiness evaluation test First test program begins in February Mid-size luxury vehicles Protocol and ratings criteria finalized after first vehicle tests

35 Dedicated to reducing deaths, injuries, and property damage on the highway