Based on the severity of the impact, a
sensor in the bumper activates the
pop-up control-unit which in turn will
trigger a small explosive actuator that
raises the hood.
14 November 2007.
With the launch of its new Skyline
coupe in Japan last month, Nissan has inaugurated its
“pop-up engine hood” design to help reduce head
impact injuries in the event of a pedestrian collision.
To help minimize serious head injury,
the pop-up movement increases the space between the hood
(bonnet) and the engine, to avoid collision with hard
So, in the case of a car-pedestrian
collision, the engine hood is designed to pop-up
instantly to help create a protective buffer space
between the hood and the engine components underneath.
Skyline Coupe gets Nissan's pop-up
engine hood design.
Based on the severity of the impact
with the pedestrian, a sensor incorporated in the bumper
activates the pop-up control-unit which in turn will
trigger a small explosive actuator that raises the hood.
Nissan says that another positive
effect comes from the pop-up hood as it allows car
designers greater freedom in having to balance the
aesthetic of a streamlined hood design with the safety
benefits of adding more protective space over the engine
In other words, designers can now
make the bonnet much lower and closer to the engine, as
the safety buffer between engine and hood is now
guaranteed by the pop-up design, so that buffer space is
not needed on a permanent basis, but rather when
needed... if needed.
The pop-up engine hood design
is part of Nissan's declared commitment to build safer
vehicles. In Japan, the company’s safety objective is
to halve the number of traffic fatalities or serious
injuries involving Nissan vehicles by 2015 compared with
the level in 1995.