Toyota continues to extend its passive safety technologies with the addition of new features. For instance, the Active Headrest was developed as an extension to the WIL concept seat with a goal of achieving a further 10-20% reduction in the severity of whiplash injuries.
How does it work?
Toyota engineers learned that moving the headrest diagonally upwards in rear-end collisions simultaneously helps restrain the head and lower back while reducing the impact on the neck.
In a rear-end collision, an occupant’s back pressing against the seatback causes a lower unit to signal a trigger at the top of the seat instantaneously, which then moves the head restraint upwards and diagonally between twenty-five to thirty millimeters in roughly .03 seconds. If adjusted properly, the head restraint swiftly couples with the back of the occupant’s head, helping to reduce the impact to the neck and lessen the severity of whiplash injury.