Whiplash is a common neck injury in rear-end collisions. Studies in Japan have found these types of collisions to cause more than 50% of the injuries from car accidents, and approximately 90% of these involve neck injuries. To help reduce the danger from these types of accidents, Toyota has developed seats incorporating its WIL, or Whiplash Injury Lessening, concept.
How does it work?
Whiplash injuries occur when the forces of a rear-end collision cause the head and torso to move relative to one another. Testing has shown that it is important for the seatback and headrest to simultaneously restrain the occupant’s head and torso during an impact, and so Toyota reassessed the position of the setback frame and headrest in designing the WIL concept seats.