Information was shared on ISO Task Force 4 activity which was dedicated on compatibility between CRS and vehicles (belt compatibility, Isofix compatibility for support leg & top tether.
Isofix & belt anchors position). The group is focussing now on booster compatibility only.
Initial CAD reconstructions were conducted. They were useful to define improvements areas on the current fixture. A physical fixture confirms these modifications needs during a Workshop held last August in Renault Lardy technical centre. A new version of the CRF will be proposed soon.
TF4 is also investigating lateral protection responsibility. The position of the 5th percentile female dummy was chosen as a reference. It was observed that P10 head position in current booster is always higher than the HIII 5th percentile female dummy. The Q6 head is located lower to the 5th percentile head but not so much (4 to 10 cm). Q6 head’s position is highly dependant from the booster used.
5th percentile female head‘s position was determined when seated on the i-Size bench. TF4 propose to test lateral protection when child’s head is below an horizontal plane located [750 mm] above the Cr point. Above [750 mm] the car needs to protect the head.
This proposal was debated widely. The possibility or the requirement to propose side impact protection above [750 mm] or outside the fixture was discussed. Will this imply a compatibility list? What about the responsibility in case of bad side curtain deployment?
(The diagram presented in document CRS-40-04 from the chairman summarizes the situation.)
The IG is interested by ISO/TF4 proposals but suggests integrating a belt routing in the fixture.