The AHED8x8 advanced hybrid electric drive technology demonstrator introducing
several enabling technologies expected to become the foundation of future
vehicle design. The vehicle will be equipped with a 536hp engine, augmented
by electrical power burst delivering up to 850 hp for 30 – 60 second
bursts. The application of in-hub electric motor drive and hybrid power
enables high flexibility of design, especially with low profile vehicles.
AHED uses air suspension to enable adjustable height and attitude control
changing the ground clearance from 13 to 58 cm (5-23 inches), depending
on operational requirement and terrain. This feature and the use of all
wheel 8x8 drive are contributing to the impressive cross-country mobility
of the vehicle. Mobility is further enhanced with the use of wheel and
track hybrid steering offering different steering modes for fast-road
and slow and off-road travel. With differential (track) steer, AHED could
take a tight turn at 33% tighter than a LAV III. Since all wheels are
controlled independently, the vehicle could also use pivot turning, when
stationary (turn like a tank).
AHED will use an efficient, quiet in-hub permanent magnet motor. By dynamically
managing the torque at each wheel, the vehicle could be configured for
full 8x8, 4x4+2 or 6x6 for maximum traction without shifting between "low"
and "high" gears. It will also have high redundancy in case
of failure or battle damage to some of the wheels. The use of run-flat
tires further improves mobility
under combat conditions. The Hybrid
Electric Drive (HED) uses a diesel engine which drives an electrical
generator that feeds the in-hub electrical motors and maintains the full
state of charge of li-ion batteries located below the floor. This system
can be used in three different modes of operation. The diesel electric
transmission drive mode is used with batteries disconnected, damaged or
removed. When driving in hybrid mode, battery power will be used to supplement
the diesel engine power, absorb deceleration energy and soften engine
transients. The vehicle will be able to move very quietly on electrical
power only, at speeds of up to 20 mph.
benefit is the increased fighting compartment volume, improved accessibility
via low load deck and large rear door. Further benefit of the new design
is the side-by-side front crew seating. The driver and commander will
be able to comfortably operate the vehicle and its remotely controlled
weapons and sensors from large "virtual windows" displaying
a panoramic view of the forward arc, enhanced with target acquisition
cues, situational picture and driving aids, including navigation aids,
obstacle alerts etc.
AHED family of vehicles will be designed for C-130 mobility and include
vehicles weighing from 16 to 20 US tons (14.5 – 18 metric tons),
be designed with a common chassis and common components to optimize supportability.
Three basic types are planned, derived from the base chassis - a medium
profile vehicle, a vehicle with increased head room for command and control,
MEDEVAC etc. and a cab-forward base vehicle with maximum payload volume.
The base vehicle will be designed of an aluminum and composite structure,
utilizing titanium and ballistic armor and appliqué armor protection.
The vehicle is designed to reduce visual and thermal signature, with low
a profile chassis, sub-floor exhaust and forward fuel tank, masking the
engine. The vehicle can be structured with a new mine resistant capsule
providing protection to the crew and systems while saving up to 1 ton
compared to equivalent LAV III design.
AHED has advanced through several test phases in recent years, accumulating
over 4,200 km of road and cross-country testing. By the end of the FRES
evaluation phase, AHED is expected to log over 12,000 km.