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NHTSANHTSA’’ss
Initial Evaluation Initial Evaluation of Child Side Impact of
Child Side Impact Protection Protection ––
Update Update
Allison E. Louden, NHTSAAllison E. Louden, NHTSA
February 6, 2009February 6, 2009
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Government Industry Meeting – February 20092
TakataTakata
Side Impact SledSide Impact SledSled pulse Sled pulse –– ½½ sine
with sine with pk~28gpk~28g
Reach pk. velocity in 250 mmReach pk. velocity in 250 mm
Sled velocity Sled velocity –– 20 mph, based 20 mph, based on
small vehicle FMVSS 214 on small vehicle FMVSS 214 tests (door
accelerometers)tests (door accelerometers)
Honeycomb stiffnessHoneycomb stiffness
Door padding stiffnessDoor padding stiffnessTakataTakata’’ss
foam (stiffer)foam (stiffer)EthafoamEthafoam type (softer)type
(softer)
Lateral (0Lateral (0oo) impact angle; ) impact angle; option to
change impact option to change impact angle angle
150mm
300mm
“ –‚è– Ê400mm �~150mm
100mm
300mm
Slide seat mass 100kg
Aluminum honeycomb250mm
ImpactorSlide seat
Contact surface
Takata setup
NHTSA setup
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Government Industry Meeting – February 20093
Previously presented at 2008 Government Previously presented at
2008 Government Industry meeting Industry meeting
Two series of tests with Q3s dummyTwo series of tests with Q3s
dummySled at two impact angles Sled at two impact angles –– 00oo
and 10and 10oo
Five different CRS modelsFive different CRS models
TakataTakata sled exhibited good repeatabilitysled exhibited
good repeatability
Able to distinguish between Able to distinguish between
carseatcarseatmodels using injury levelsmodels using injury
levels
Initial CRS SI Sled TestingInitial CRS SI Sled Testing
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Government Industry Meeting – February 20094
Sled Tests at Varying Impact AnglesSled Tests at Varying Impact
Angles
Test at 0Test at 0oo, 10, 10oo, 15, 15oo and 20and 20oo Impact
AngleImpact AngleRotated Rotated TakataTakata sled buck relative to
HYGE sled buck relative to HYGE impactorimpactor
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Government Industry Meeting – February 20095
Sled Tests at Various Impact AnglesSled Tests at Various Impact
Angles
Selected 3 of previous 5 CRS models testedSelected 3 of previous
5 CRS models testedGracoGraco SafeSeatSafeSeat Step2Step2
EvenfloEvenflo TriumphTriumph
MaxiMaxi--CosiCosi PrioriPrioriDid not select Did not select
GracoGraco LogicoLogico M (lack of availability) nor M (lack of
availability) nor Safety 1Safety 1stst AllAll--inin--One CRS (due
to head contact at 10One CRS (due to head contact at 10oo
impact angle)impact angle)
Selection primarily based on side wing designSelection primarily
based on side wing designSafeSeatSafeSeat Step2 and MaxiStep2 and
Maxi--CosiCosi Priori Priori –– wings wings essentially
perpendicular to the CRS seatbackessentially perpendicular to the
CRS seatback
EvenfloEvenflo Triumph Triumph –– wings slightly more angled
wings slightly more angled outward from seat back outward from seat
back
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Government Industry Meeting – February 20096
CRS Side Wing DesignsCRS Side Wing Designs
GracoGraco
SafeSeatSafeSeat
Step2Step2 EvenfloEvenflo
TriumphTriumph
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Government Industry Meeting – February 20097
1515oo Impact AngleImpact Angle
GracoGraco
SafeSeatSafeSeat
Step2Step2 MaxiMaxi--CosiCosi
PrioriPriori
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Government Industry Meeting – February 20098
2020oo
Impact AngleImpact Angle
GracoGraco
SafeSeatSafeSeat
Step2 Step2 EvenfloEvenflo
TriumphTriumph
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Government Industry Meeting – February 20099
HICHIC 1515 Values for Angled Sled TestsValues for Angled Sled
Tests
HIC15 Values Q3s Dummy
0
200
400
600
800
1000
1
HIC
15
Buck 0 deg
Buck 10 deg
Buck 15 deg
Buck 20 deg
Graco SafeSeat Step2 Evenflo Triumph Maxi-Cosi Priori
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Government Industry Meeting – February 200910
Neck Tension for Angled Sled TestsNeck Tension for Angled Sled
TestsNeck Tension Q3s Dummy
0
500
1000
1500
2000
2500
3000
3500
1
Forc
e (N
)
Buck 0 deg
Buck 10 deg
Buck 15 degBuck 20 deg
Graco SafeSeat Step2 Evenflo Triumph Maxi-Cosi Priori
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Government Industry Meeting – February 200911
Spine ySpine y--axis Acceleration for Angled axis Acceleration
for Angled Sled TestsSled Tests
Spine Y Acceleration Q3s Dummy
0
20
40
60
80
100
120
140
1
Acc
eler
atio
n (G
)
Buck 0 deg
Buck 10 deg
Buck 15 deg
Buck 20 deg
Evenflo TriumphGraco SafeSeat Step2 Maxi-Cosi Priori
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Government Industry Meeting – February 200912
Pelvis yPelvis y--axis Acceleration for Angled axis Acceleration
for Angled Sled TestsSled Tests
Pelvis Y Acceleration Q3s dummy
0
20
40
60
80
100
120
140
160
1
Acc
eler
atio
n (G
)
Buck 0 deg
Buck 10 deg
Buck 15 deg
Buck 20 deg
Graco SafeSeat Step2 Evenflo Triumph Maxi-Cosi Priori
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Government Industry Meeting – February 200913
Chest Displacement for Angled Sled Chest Displacement for Angled
Sled TestsTestsChest Displacement
Q3s Dummy
0
5
10
15
20
25
30
35
40
1
Disp
lace
men
t (m
m)
Buck 0 deg
Buck 10 deg
Buck 15 deg
Buck 20 deg
Graco SafeSeat Step2 Evenflo Triumph Maxi-Cosi Priori
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Government Industry Meeting – February 200914
Angled Sled Test SummaryAngled Sled Test Summary
Upper torso and head increasingly rotated forward Upper torso
and head increasingly rotated forward in CRS as impact angle
increasedin CRS as impact angle increasedIncreased neck tension
appeared to be due to Increased neck tension appeared to be due
to
increased impact angleincreased impact angleCRSsCRSs’’ wing
designwing design
Spine and pelvis ySpine and pelvis y--axis accelerations axis
accelerations highest at 0highest at 0oo impact angle for the
impact angle for the SafeSeatSafeSeat Step2 and Step2 and
TriumphTriumphvirtually identical across the impact angle range for
Maxivirtually identical across the impact angle range for
Maxi--CosiCosi PrioriPriori
Impact angle appeared to have minimal effect on Impact angle
appeared to have minimal effect on lateral chest displacement for
the 3 CRS modelslateral chest displacement for the 3 CRS models
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Government Industry Meeting – February 200915
CRS SI Crash Test ObjectivesCRS SI Crash Test Objectives
Conduct CRS nearConduct CRS near--side fullside full--scale
FMVSS No. scale FMVSS No. 214 side impacts to obtain more accurate
info:214 side impacts to obtain more accurate info:
Amount of door intrusionAmount of door intrusionDoor velocity at
time of CRS/dummy contactDoor velocity at time of CRS/dummy
contactAmount of vehicle rotation at CRS/dummy Amount of vehicle
rotation at CRS/dummy locationlocationDummy responses to evaluate
sled test severity Dummy responses to evaluate sled test severity
and parametersand parameters
Determine similarities between crash tests Determine
similarities between crash tests and sled testsand sled tests
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Government Industry Meeting – February 200916
CRS SI Crash TestsCRS SI Crash Tests’’08 Nissan 08 Nissan
SentraSentra & & ’’08 Nissan Versa08 Nissan Versa
One Sentra test FMVSS No. 214D test conditions
One Sentra and two Versa tests impact point 228.6 mm (9 inches)
rearward of that specified in FMVSS No. 214D in effort to more
directly load door at occupant location
Graco SafeSeat Step2 and Maxi-Cosi Priori seats
Q3s (near-side) and Hybrid III 3Cs (far-side)
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Government Industry Meeting – February 200917
Crash Tests Compared to Sled Tests
Sliding Seat Pulse Parameter
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Government Industry Meeting – February 200918
Sliding Seat Pulse Parameter
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Government Industry Meeting – February 200919
CRS Locations Relative to CRS Locations Relative to Door Panel /
ArmrestDoor Panel / Armrest
4
32
SentraSentra
Struck Side Door Panel Struck Side Door Panel Versa Struck Side
Door Panel
23
4
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Government Industry Meeting – February 200920
SummarySummary
Sled and crashed vehicle responses Sled and crashed vehicle
responses comparable comparable
Dummy and CRS kinematics in crash tests Dummy and CRS kinematics
in crash tests similar to those in sled testssimilar to those in
sled tests
Armrest issue needs further investigationArmrest issue needs
further investigation
Some dummy responses similar, while others Some dummy responses
similar, while others differed, between sled and crash
testsdiffered, between sled and crash tests
Additional evaluation of results required to Additional
evaluation of results required to refine side impact sled test
parameters refine side impact sled test parameters
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For additional inquiries, contact
Allison E. Louden [email protected]
(937) 666-4511
Lisa K. [email protected]
(937) 666-4511
mailto:[email protected]:[email protected]
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Thank YouThank You
Slide Number 1Takata Side Impact SledInitial CRS SI Sled
TestingSled Tests at Varying Impact AnglesSled Tests at Various
Impact AnglesCRS Side Wing Designs15o Impact Angle20o Impact Angle
HIC15 Values for Angled Sled TestsNeck Tension for Angled Sled
TestsSpine y-axis Acceleration for Angled Sled TestsPelvis y-axis
Acceleration for Angled Sled TestsChest Displacement for Angled
Sled TestsAngled Sled Test SummaryCRS SI Crash Test ObjectivesCRS
SI Crash TestsCrash Tests Compared to Sled TestsSlide Number 18CRS
Locations Relative to Door Panel / ArmrestSummaryFor additional
inquiries, contactThank You
