Transcript of Objective seating comfort scores for auto seat design
- 1. Objective seating comfort scores forauto seat design.ERL
LLCFebruary 15, 2012
- 2. Objective Auto Seat DesignOptimize seat for driver at start
of production Body Size & Back Posture Vision of Road Reach to
Controls Seat Size, Shape and Deflection Objective Seat Comfort
Score
- 3. Body Size & Back Posture:Japan, Italy, Germany &
USAFemale Male5th5thStanding Height5th95th 95th1st
1st1st95th99th99th S N ES N ES NE99th 1400 1500 16001700 1800 1900
Standing ERLERLERL Large Stature SmallMediumMale (mm) Female
MaleANSUR (U.S. ARMY) }GermanyUS Patents: #6,840,125, #7,047,831,
#7,347,114, #7,797,138 PeopleSizeItaly 2000 v2.06JapanE = Erect ERL
OccupantN = Neutral ERL OccupantS = Slumped ERL Occupant
- 4. Vision: Depends upon eye positionfor driving without visual
obstructions Upward Vision Target (X, Z) Rearview MirrorUpward
VisionAngleDownwardVision Angle Downward Vision Target (X, Z)
Instrument PanelUS Patents: #6,840,125, #7,047,831, #7,347,114,
#7,797,138
- 5. SMALL FEMALE HAND REACHSeat tilt lever outside reach
boundaries. US Patents: #6,840,125, #7,047,831, #7,347,114,
#7,797,138
- 6. LARGE MALE HAND REACHAll hand controls within reach
boundaries.US Patents: #6,840,125, #7,047,831, #7,347,114,
#7,797,138
- 7. Seat Deflection: Meat-to-Metal is distanceof deflected body
surface to frame Problem: Identify Bodyall locations of
body-to-frame distances that are less than allowable for seat
stiffness and ride comfort FrameUS Patents: #6,840,125, #7,047,831,
#7,347,114, #7,797,138
- 8. Seat Deflection: Pressure is bodypenetration of Sitting
Surface Body Problem: Find the maximum penetrations of body into
seat STO bolster Bolster surfacesUS Patents: #6,840,125,
#7,047,831, #7,347,114, #7,797,138
- 9. Seat Deflection: Penetration of the thighinto the seat wing
(Pressure) Measure using tools in CAD. If maximum penetration
exceeds criteria forBody comfortable pressure, adjust seat design
parameters and find new solution. Bolster US Patents: #6,840,125,
#7,047,831, #7,347,114, #7,797,138
- 10. Lumbar Support Analysis Example Lumbar in seat provides no
supportfull support no support Required Actual LumbarOccupant Erect
Lumbar % Support Support Force Posture Support Force Provided by
Seat(N) (N)Small Female 40.87.919.3% Medium Male 123.242.434.4%
Large Male168.225.815.3%Bite line too far forward US Patents:
#6,840,125, #7,047,831, #7,347,114, #7,797,138
- 11. Objective Seat Comfort:Evaluate for the Global Population
Drivers Preferred Position Seat support and contact of Drivers Body
Vision meets needs of all drivers Reach to controls & switches
All drivers equally fit in seat & car
- 12. All drivers prefer a neutral posture, but eachhas different
needs to be accommodated.Erect VisionNeutral Controls
ReachHeadroomSlumped LegroomSmall Female (5th %) Medium Male (50th
%) Large Male (95th %) US Patents: #6,840,125, #7,047,831,
#7,347,114, #7,797,138
- 13. Objective Comfort Scores on 5 pt scaleJapanese
SubcompactGerman SedanAmerican SUV
- 14. Japanese SubcompactERL Population Comfort Scores
- 15. Japanese Subcompact Seat 4.2
- 16. Japanese Subcompact DriverSMALL FEMALE ERL Score: 3.25
Cushion: 3.1; Back: 3.4; Package: 5.0 Cushion is too longtoo long
too short Cushion is wide at Thigh & Ischium too narrowtoo wide
Head Restraint is too closetoo close too farUS Patents: #6,840,125,
#7,047,831, #7,347,114, #7,797,138
- 17. Japanese Subcompact Driver MEDIUM MALEERL Score:
4.57Cushion: 4.19; Back: 4.51: Package: 5.0Cushion length is just
right too longtoo shortCushion doesnt provide enough thigh support
too much no supportShoulder patch wing shape is closetoo closetoo
farUS Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
- 18. Japanese Subcompact DriverLARGE MALE ERL Score: 3.3
Cushion: 2.0; Back: 4.2; Package: 4.3 Cushion length is shorttoo
longtoo short Cushion doesnt provide enough thigh support too much
not enough Seat requires additional rearward travelforward rearward
Shoulder patch wing shape is closetoo close too farUS Patents:
#6,840,125, #7,047,831, #7,347,114, #7,797,138
- 19. German SedanERL Population Comfort Scores
- 20. German Sedan Seat 4.12
- 21. German Sedan Driver SMALL FEMALE ERL Score: 3.61 Cushion:
2.16; Back: 4.33; Package: 4.33 Cushion too long too longtoo short
Cushion provides thigh pressuretoo much pressure no support Cushion
is too wide at Ischium too narrowtoo wide Shoulder is close too
close too far Can not comfortably reach pedalscan notcanUS Patents:
#6,840,125, #7,047,831, #7,347,114, #7,797,138
- 22. German Sedan DriverMEDIUM MALEERL Score: 4.17 Cushion:
3.83; Back: 3.78; Package: 4.90Cushion length is just righttoo long
too shortCushion provides thigh pressure too much pressureno
supportCushion is wide at ischiumtoo narrowtoo wideHead restraint
is far too closetoo far US Patents: #6,840,125, #7,047,831,
#7,347,114, #7,797,138
- 23. German Sedan DriverLARGE MALEERL Score: 4.22Cushion: 4.50;
Back: 3.22; Package: 5.00Cushion length is just right too longtoo
shortCushion is wide at thigh too narrowtoo wideShoulder wing shape
provides too much penetration extreme penetrationno contactHead
restraint is too far too closetoo far US Patents: #6,840,125,
#7,047,831, #7,347,114, #7,797,138
- 24. American SUVERL Population Comfort Scores Seat PackageTotal
Cushion Back Package Penalty % Penalty %Total (1.00 - 5.00) 4.48
4.53 4.194.94 0.401.40Small Female3.03 3.30 2.774.34 3.759.55Medium
Male 4.69 4.63 4.445.00 0.000.00Large Male4.39 5.00 3.645.00
0.304.40
- 25. American SUV Seat4.53
- 26. American SUV DriverSMALL FEMALEERL Score: 3.05 Cushion:
3.3; Back: 2.75; Package: 4.34 Cannot comfortably reach
acceleratorcannot reachcan reach Cushion length is too longtoo
longtoo short Head restraint is too closetoo close too far Seatback
stiffness is too soft too firm too soft Bite line contact is
closeextreme penetration no contact 25mm (Heel off floor) US
Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
- 27. American SUV DriverMEDIUM MALE ERL Score: 4.7 Cushion:
4.65; Back: 4.45; Package: 5.0Cushion length is just right too long
too shortSeatback insert stiffness is too soft too firm too
softOverall bolster shape provides good supportextreme penetration
no contactUS Patents: #6,840,125, #7,047,831, #7,347,114,
#7,797,138
- 28. American SUV DriverLARGE MALE ERL Score: 8.8 Cushion: 5.0;
Back: 3.65; Package: 5.0Cushion length is just righttoo longtoo
shortOverall bolster shape provides good supportextreme penetration
no contactSeatback insert stiffness is too softtoo firmtoo softBite
line contact is close too fartoo closeUS Patents: #6,840,125,
#7,047,831, #7,347,114, #7,797,138
- 29. Comfort scores and body dimensions define population
affectedby seated comfort in Automobile.
- 30. Seat Cushion Dimensionsfor Global Market Evaluation US
Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
- 31. US Female Population:Cushion Length & Contact Length
Analysis86% of CushionLength FemalesCushionToo LongLengthToo Short
Cushion section behind calf Females: Cushion Length is TOO
LONG:14%} Cushion Length is LONG:5% Small FemaleContact Length Is
JUST RIGHT: Contact Length Is SHORT:81%0%86% Contact Length Is TOO
SHORT:0% Cushion Supports 86% of US Females** Based on Buttock-Knee
lengthusing ANSUR data base. US Patents: #6,840,125, #7,047,831,
#7,347,114, #7,797,138
- 32. US Male Population:Cushion Length & Contact Length
Analysis97% of MalesCushion Length Cushion Too Long LengthToo
ShortCushion section behind calfLarge Male Males: Cushion Length is
TOO LONG: 2%} Cushion Length is LONG: 1% Contact Length Is JUST
RIGHT: 94%97% Contact Length Is SHORT:2% Contact Length Is TOO
SHORT: 1% Cushion Supports 97% of US Males* Cushion section behind
calf Medium Male * Based on Buttock-Knee length using ANSUR data
base. US Patents: #6,840,125, #7,047,831, #7,347,114,
#7,797,138
- 33. % of US Market affected by Sources ofDiscomfort in Seating
% PopulationVehicle Small FemaleAverage Male Large Male