US Patent 10479413 Vehicle floor and subassemblies thereof

A sill assembly for a vehicle includes an energy-absorbing region and a force-spreading region. The energy-absorbing region is elongated in a fore-aft direction and includes an inboard subregion and an outboard subregion. The outboard subregion is arranged outboard of and proximate to the inboard subregion. The force-spreading region is elongated in the fore-aft direction and is arranged outboard of and proximate to the energy-absorbing region and spreads force from outboard loading to the energy-absorbing region. Along the fore-aft direction, the force-spreading region has greater inboard compressive strength than the outboard subregion, and the outboard subregion has greater compressive strength than the inboard subregion.