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Dual-recliner ABTS Seats in Severe Rear Sled Tests with the 5th, 50th and 95th Hybrid III
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 06, 2021 by SAE International in United States
Event: SAE WCX Digital Summit
The strength of seats has increased over the past four decades, which includes a transition to dual recliners. There are performance issues with stiff ABTS (All Belts to Seat) and very strong seats in rear impacts with different occupant sizes and physical conditions. In this study, eight rear sled tests were conducted in four series: 1) ABTS in a 56 km/h (35 mph) test with a 50th Hybrid III ATD (Anthropometric Test Device) at MGA, 2) dual-recliner ABTS and F-150 in a 56 km/h (35 mph) test with a 5th female Hybrid III ATD at Ford, 3) dual-recliner ABTS in a 48 km/h (30 mph) test with a 95th Hybrid III ATD leaning inboard at CAPE and 4) dual-recliner ABTS and Escape in 40 km/h (25 mph) in-position and out-of-position tests with a 50th Hybrid III ATD at Ford. The sled tests showed that single-recliner ABTS seats twist in severe rear impacts with the pivot side deformed more rearward than the stanchion side. The use of dual recliners on ABTS seats prevented twist but increased the stiffness causing serious injury risks, particularly to small stature occupants. Dynamic testing of yielding seats has found they provide a balance in strength and compliance for front-seat occupant protection of various sizes and physical conditions.