GTR 7 -01 -07 KOREA GTR No 7

GTR 7 -01 -07 KOREA GTR No. 7 2 nd Phase Research Results Dec. 8, 2009 Ministry of Land, Transport and Maritime Affairs, Korea Automobile Testing and Research Institute 1

Backgrounds - regulatory 1998협정 (GTR) KOREA Europ l Headrest. KMVSS upgrade plan ü During GTR 7 discussion, KOREA considered harmonization with lead time, etc. ECE EEC Regulations Directives Asia KOREA Safety Standards ü All possible GTR options will be considered on KMVSS. Adopting in KNCAP & Lead Good H/R Performance Offer the advantage of design preceding, etc. America Standards 2005년 make the program (gov) USA North FMVSS JAPAN Safety Standards 호주 Safety ü Phase I GTR will be adopted as KMVSS in 2010. Before GTR introduce in KMVSS, CANADA CMVSS Global Technical Regulations // 2006년-2007년 // 2006년 -2007년 2008년 // 2009년 + KNCAP Static Dynamic KMVSS GTR No. 7 Publish (2008. 3) GTR Discuss with MLTM 2 nd Phase start Actively research & Coop. 2

Objective of KOREA Research Ø Objective ü Harmonization of GTR No. 7 in KMVSS ü Global cooperation for Head restraints GTR Phase II GTR Ø GTR 2 nd Phase Terms of reference ü Head restraint Height ü Whiplash Injury (MAIS 1 or MAIS 2 more) ü Define Test procedures Ø Work Scop ü GTR No. 7 Phase II - Head restraints height : Effective height - Test condition - Clarify the mechanism of whiplash injury - Evaluation of Bio. RIDII in KOREA - Evaluation of Indicator - Dynamic Test - Feasibility studies etc. • Evaluation of Bio. RIDII : Repeatability, Reproducibility • Evaluation injury indicator in Bio. RIDII • Check the Bio. RIDII calibration procedures 3

Over all Research Schedule Stage 1(2008) Harmonization GTR No. 7 Stage 2(2009) GTR No. 7 Review Discuss with MLTM Statistic review & Test Additional Test Repeatability Test 2010 will be published. Reproducibility Test GTR No. 7 Phase II Head Restraints Height Bio. RID II New Cal. system Test GTR No. 7 2 nd Amendment Bio. RID II propriety review 4

Evaluation of Bio. RIDII performance u Test Condition Ø Dummy & Number of tests - Denton 3 different Bio. RIDII-g (S 1, S 3, S 4)[ Dummy was calibrated before the test. ] - 3 times Test in KATRI(engineer also KATRI persons) Ø Pulse : KNCAP (Same as the E-NCAP Medium pulse 16 km/h) Ø Seat & Head restraints setting : KNAP(Same as the E-NCAP ) Ø Neck injury indicator : - Head X acc, Nkm, NIC, HRC, T 1 X acc, Upper-Fx –Fz -My, Lower-Fx, -Fz, - My Location Tolerance H-point (X-axis) +20 mm Forward ± 10 mm H-point (Z-axis) 0 mm ± 10 mm Pelvis angle 26. 5° ± 2. 5° Head plane angle 0° ± 1° Backset [ Seld Pulse ] Target measure 15 mm Forward ± 5 mm [ Bio. RID Setup Summary ] 5

Evaluation of Bio. RIDII u Method of Evaluation Ø Repeatability C. V = Sd X 100 (%) X　　=　Mean value of each dummy S d ＝ Standard deviation of each dummy Ø Reproducibility MSB-MSW SB　=　　　 n C. V = 1/2 SB XG 100 (%) XG　= Mean value of 3 dummies MSB : Mean square between groups (dummies) MSW : Mean square in a group (each dummy) n : Number of repetitions of test 6

Evaluation of Bio. RIDII u Seat condition & Dummy setting S 4 S 3 S 1 HRMD Measurement S 3 S 1 S 4 ⓐ ⓔ S 4 S 3 S 1 ⓓ ⓑ ⓒ Measurement C. V 7

Evaluation of Bio. RIDII C. V. u Results of Repeatability Evaluation v Head X repeatability in all dummy is good. v Among 3 dummies, each C. V. does not show consistency but graphs are pretty similar. Ø Even though Bio. RID calibrated, repeatable variation has been depend on dummy. 8

Evaluation of Bio. RIDII u Results of Reproducibility Evaluation v Upper Fx & My, Lower Fz, Nkm_Nfa are not acceptable indicators during the test. Nkm_fa ESV paper (09 -0492) ESV paper by Japan(09 -0302) 9

Evaluation of Bio. RIDII – Test site variation u Test Condition Ø Dummy : Bio. RIDII-g 1 test each site. Ø Test Site : 2 different site (Hyundai, Dymos) Ø Pulse : KNCAP (Same as the E-NCAP Medium pulse 16 km/h) Ø Seat : same seat, other conditions same repeatability test 10

Evaluation of Bio. RIDII – Test site variation Head X HRC T 1 Acc Upper My : about 7 Nm Upper Fx Upper Fz: about 100 N 11

Head Restraint Height – Non Active Seat v Review of KOREA Anthropometry statistics, the reasonable height of Head Restraint is 800 mm Ø Purpose - Neck Injury indicators analysis comparing 800 & 850 mm H/R height Ø Test condition - Pulse : K-NCAP (E-NCAP medium pulse) - Seat setting : K-NCAP Headrest. height 800 mm Headrest. height 850 mm T 1 Acc av - Dummy : Denon Bio. RID Iig (KATRI) - Head restraint height : 800, 850 mm Upper Fz NIC v Indicators on 800 mm height H/R are slightly higher than 850 mm height H/R v But not a big different. 12

Evaluation of Bio. RIDII Calibration procedures Current Version New Version : Changed part Ø Changed Parts : Head Rest Jig, Foam block, Probe, Sliding guild. u Evaluation Ø Repeatability Test : Graphs review Ø Dummy : 4 ea Denton Bio. RIDII-g Ø Test condition : Each dummy passed the current cal procedures and then 3 or 4 tests of each dummy were conducted on the new cal. system with H/R & not. 13

New sled without H/R Jig Cal. Result Graphs New Sled Old Sled Each dummy shows repeatable but there are some discrepancy with dummies. 14

New sled wit H/R Jig Cal. Result Graphs Each dummy shows repeatable but there are some discrepancy with dummies. (Upper Neck Fx, My, Lower Neck Fx, Fz, My) 15

Other Issue Ø Pendulum force on new sled system is much higher then old version, so head & neck movement is too strong and too much. It’s cause of neck bumper separation during the calibration test. Ø During the cal. test setup, sled keep moving, need fixing jig. 16

Evaluation of Bio. RIDII – Denton & FTSS u Test Condition Ø Dummy : Bio. RIDII-g Denton & Bio. RIDII FTSS. Ø Test Site : KATRI, Test setup : same condition (repeatability test condition) Ø Test number : 3 times After Before 17

Evaluation of Bio. RIDII – Denton & FTSS T 1 Acc C. V. Head X Upper Fz Upper Fx v Head X repeatability in two dummies are good. v Upper Fx is not acceptable with two dummies v Upper Fz & My & Lower My in Denton Bio. RID and Upper My Lower My Upper Fz in FTSS Bio. RID is not acceptable for repeatability analysis. 18

Summary v Result data for neck injury indicators on Bio. RIDII - Repeatability : S 1 & S 3 dummy is marginable but S 4 dummy is not acceptable. - Reproducibility : Not acceptable for Upper Fx, Upper My, Lower Fz, & Nkm. Similar results submitted last ESV. (Japan & Europe) - Results of different site test are similar except upper Fz & My. v With repeatability & reproducibility issues, we may suggest some robust indicator after full consideration for neck injury mechanism in stead of neck injury indicator. → In terms of the regulation, small variation of seat condition must be acceptable. (Seat is not rigid structure) v Neck injury indicators on 800 mm HR were slightly higher than 850 m HR but not a big different each other. v New cal. system shows good repeatable but the results between dummies are different. (Need further study) v Neck injury indicators on Denton & FTSS Bio. RIDII are similar with each other. 19