HX CONCEPT PROVIDES VISION OF A
RUGGED, OPEN-AIR HUMMER
- Youthful, open-air
entry-level-size HUMMER
- Designed by a trio of young
designers
- Convertible body with removable
roof panels and modular rear roof assembly
- Easily removable fender flares
and doors
- Full-time 4WD with front and
rear locking differentials
- Aeronautically inspired interior
with functional, lightweight design elements
- Reconfigurable instruments for
highway and off-road driving
- 3.6L SIDI V-6 E85 FlexFuel
engine with six-speed automatic transmission
DETROIT – With its unmistakable HUMMER design
and a compact, go-anywhere driving ethic, the HUMMER HX concept challenges the
hierarchy of the trail. HUMMER displayed the nimble, reconfigurable off-roader
at the 2008 North American International Auto Show.
More compact than a HUMMER H3 – 81 inches (2,057 mm) wide,
with a 103-inch wheelbase (2,616-mm) – the HX concept is an open-air, two-door
off-road vehicle that packs the off-road acumen for which HUMMER has become
legendary, along with an easily convertible body that acclimates to varied trail
conditions, cargo needs or passenger whims. Its design is based on the ideas
developed by a trio of young designers who are new to the HUMMER studio.
"The HX is HUMMER's vision an agile, trail-ready, open-air
vehicle that fits the lifestyles of everyone who needs or wants to drive off
road," said Martin Walsh, HUMMER general manager. "Of course, it carries
exceptional off-road capability and the distinctive styling for which all
HUMMERs are known."
The HX offers an open-air driving experience via a pair of
removable roof panels above the driver and front passenger, and a modular,
removable rear roof assembly. With the roof panels and roof assembly removed,
the HX is transformed into a true convertible.
Easy removal of the roof panels and rear-roof assembly enables
quick conversion from a closed vehicle to an open one. The HX also was designed
with several roof assemblies, allowing this versatile vehicle to be configured
as an SUT (with the roof assembly removed), a stylish slant-back or a
traditional, wagon-like design that offers a bit more cargo space.
The HX was shown with a slant-back configuration, wearing a
desert-inspired matte olive paint scheme, at the North American International
Auto Show. Additional convertible features include:
-
Removable doors – easily removable pins in the exposed hinges allow
the doors to be removed quickly – an appreciated feature of many serious
off-roaders
- Removable fender flares
– attached with quarter-turn quick-release fasteners, the composite
fender flares can be quickly removed for additional trail/rock clearance, or
if the flare is damaged during off-road driving
"The modular design of the roof and removable body panels mark
an evolution of HUMMER's design aesthetic," said Carl Zipfel, director of
design. "These features demonstrate a deeper understanding of enthusiast desires
when it comes to off-road driving – and the slant-back design gives the HX a
look all its own."
Purposeful exterior
The design of the HX was driven by input from three young
designers who were new to GM and the HUMMER design studio. As part of their
"initiation," they were charged with developing concept drawings for a smaller,
youthful HUMMER and the HX is a direct result of their creativity. The HX
concept is based on one of the designers' original illustrations, but
incorporates the best ideas and elements from the other designs.
"HUMMER appeals to young people globally and served as a
perfect first assignment for our newest talent," said Ed Welburn, vice
president, Global Design. "Today's graduates from top design schools are ready
to hit the ground running. The HUMMER design challenge gave our newest designers
an opportunity to sprint."
Inside and out, the HX carries a purposeful aesthetic that,
from initial sketches to finalized clay models, was refined in only six months.
"This is the HUMMER design language stripped down to its
essence," said David Rojas, creative designer. "The HX has an aggressive
appearance and great proportions, with beauty lying in its functional
austerity."
On the exterior, the lightweight theme is evidenced in the
appearance of exposed, billet aluminum suspension components that feature
CNC-machined lightening relieves, as well as clean, unadorned bodywork and
minimal trim. The lightweight theme is taken to its extreme when the roof
panels, roof assembly, fender flares and doors are removed.
CClassic HUMMER design cues make the HX instantly recognizable,
including the round headlamps located in square housings, an upright windshield
profile, minimal overhangs, hood vents and prominent air intakes. The air
intakes are functional and feed a V-6 engine beneath the hood, while the hood
vents are active – they articulate to allow hot underhood air to escape.
And while the headlamps and grille are clearly HUMMER cues,
they've evolved on the HX with a "chopped circle" motif. The grille slots and
headlamps, as well as elements on the interior, have the appearance of circles
or ovals that have been clipped at the top and bottom, creating a unique
appearance that speaks to the vehicle's purposeful aesthetic. /p>
&"The 'cut-off' circles suggest larger, heavy-duty components
that were trimmed to fit the compact HX," said Rojas.
And while it is unadorned by extraneous embellishments, the
HX's exterior is nonetheless outfitted with features that speak to HUMMER's
legacy of technology and innovation, including HID headlamps with focusing rings
that adjust automatically when they're turned on – much like the lens of an
auto-focus SLR-type camera. LED technology is used for the front turn signal
lamps and taillamps.
Aeronautically inspired interior /strong>
From aircraft-inspired seats to integrated, off-road-ready
tools, the HUMMER HX's interior has a beauty that lies in its purposeful intent.
It was inspired by the functional and lightweight elements found in aircraft.
"Aeronautical parts are designed to be both lightweight and
strong, and that is the feeling exuded by the HX's cabin," said Stuart Norris,
interior design manager. "There isn't superfluous trim or decoration – it is a
purposeful design that conveys beauty through strength."
Reinforcing the stripped-to-the-essence feel, the exterior's
matte olive color carries over onto the interior's largely sheet metal-covered
panels. The color is accented with pressed or extruded aluminum components, such
as the handles, switches and other necessary parts.
Furthering the aeronautical influence is the instrument panel,
which uses an exposed, extruded aluminum cross-vehicle beam as its foundation.
On the beam, the instrument cluster and other vital controls are mounted; and it
also features a unique, removal top cover that provides significant storage
capability.
"The instrument panel is a styling element of the HX, and the
removal of the top cover reveals a secondary design that enhances the vehicle's
core design ethic," said Norris. "With the top cover removed, the interior
conveys even more of a basic essence – and the structure beneath the cover is
beautiful to those who appreciate finely crafted metal."
AA rubberized floor and ballistic nylon-material covering on
the instrument panel and other interior components reinforces the functional
aesthetic.
Seating and console details
Like aircraft seats, the HX's seats are constructed on a
lightweight framework with minimal components that feature lightening holes and
strength-enhancing cross braces or triangulations. They are mounted on exposed,
aircraft-style tracks and trimmed with a weather-resistant neoprene material.
The HX seats four, with a pair of bucket-type seats in the
second row. The rear seats mimic the front seats' design and can be removed to
generate more cargo room. All the seats feature a four-point, racing-style
safety harness. /p>
The inner seat track on both front seats is located beneath
the outer edges of a prominent center console. The console offers exceptional
storage capability and houses a unique shifter that mounts low and out of the
way when the vehicle is parked – also hiding from sight the engine starter
button. It has a spring-loaded cover that pops up when the driver is ready to
select a gear.
TThe console also houses a resting place for phones, MP3 player
and iPods or iPhones. In fact, there is no conventional radio in the HX, only
integrated speakers. Passengers plug in an iPod, or similar device, to a USB
connector to play music in the HX.
"From the console to the cargo area behind the seats, there
are simply untold storage possibilities within the HX," said Norris. "It's like
a four-wheel backpack that's already fitted with the necessities."
Gauges and tools
The "cut-off circles" motif of the exterior is seen even more
so on the HX's interior, as the gauge cluster, instrument panel vents and even
the steering wheel carry the design element.
A three-element gauge cluster – each of the three instrument
"pods" carries the cut-off circle design – delivers crucial driver information
in either a highway or off-road mode. This conceptual reconfigurable gauge
layout uses LCD screens with multiple layouts, including a navigation system.
The nav system features GPS and compass information; and is designed to upload
trail information before setting off on an excursion.
The center gauge pod houses a speedometer and tachometer, but
changes to a wheel angle indicator when the transmission is in the low position.
This off-road mode changeover from the highway mode gives the driver information
that is more pertinent to the driver conditions. The trail view of a camera
mounted in the rear-view mirror can be displayed on the instrument panel, too.
TThe off-road mode features of the instrument panel comprise
the virtual tools of the HX, while others are mounted for physical use,
including a folding shovel, flashlight and first-aid kit. They all carry the
"clipped circle" design motif found throughout the vehicle.
Ready for rocks, trails and more
With its compact dimensions, almost no overhangs and grippy
35-inch tires, the HX is ready for all terrains. Like all HUMMER production
models, the HX has sturdy, body-on-frame construction, onto which is mounted
front and rear independent suspensions.
The front suspension features an electronic-disconnecting
stabilizer bar for enhanced maneuverability when driving off road, and the rear
suspension is located with CNC-machined, billet trailing arms. Heavy-duty shocks
with piggyback reservoirs were custom-made for the HX by renowned racing shock
manufacturer Fox; one is mounted at each wheel position. /p>
A full-time 4WD system pulls the HX over, through and around
off-road obstacles. It transfers torque to the front and rear axles, each of
which is equipped with a locking differential. The torque meets the trail via
custom 35-inch-tall off-road tires that are mounted on a set of custom,
bead-lock-style wheels that have a two-tone appearance; dark-painted wheel
centers complemented by silver-anodized outer rims.
AA complete underbody armor kit, including a front skid plate,
powetrain protection and more, protects the HX from wayward rocks and other
potentially damaging objects. A power-operated winch is located in the front
bumper, and the HX has recovery hooks mounted on the front and rear bumpers,
just in case its help is required for wrangling others out of unfortunate
off-road situations.
Motivation for the HX comes from an E85 FlexFuel 3.6L SIDI V-6
that is backed by a six-speed automatic transmission. The transmission is teamed
with the 4WD system to offer exceptional low-speed traction and crawling
capability. Four-wheel-disc brakes provide confident stopping power.
SPECIFICATIONS/strong>
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Model:
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HUMMER HX Concept
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Body style / driveline:
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two-door, four-seat open-top, four wheel-drive
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Construction:
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welded steel frame, electro galvanized steel
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Engine type:
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3.6L V-6 VVT (variable valve timing) with
spark-ignition, direct injection
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Displacement (cu in / cc):
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217 / 3564
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Bore & stroke (in / mm):
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3.70 x 3.37 / 94 x 85.6
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Block material:
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sand-cast aluminum with cast-in bore liners
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Cylinder head material:
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ccast aluminum
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Valvetrain:
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DOHC, 4 valves per cylinder, variable valve timing
(VVT) /p>
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Fuel delivery:
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direct high-pressure fuel injection
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Compression ratio:
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11.3:1
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HHorsepower (hp / kW @ rpm):
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304 / 227 @ 6300 rpm (est)
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Torque (lb.-ft. / Nm @ rpm):
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273 / 370 @ 5200 rpm (est)
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Fuel Type:
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unleaded regular or E85 ethanol
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Transmission:
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Hydra-Matic 6L50 six-speed electronically control
automatic transmission
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Suspension: /p>
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front: independent SLA, custom Fox Racing coil-over
shocks; 2-in shocks, 2.5-in springs
rear: semi-trailing link, custom Fox Racing coil-over
shocks; 2-in shocks, 2.5-in springs
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Wheel travel (in / mm):
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front: 9 / 228
rear: 11/ 279
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Brakes
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four-wheel disc; Brembo 6-piston calipers (front);
Brembo 4-piston calipers (rear)
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Rotor diameter x thickness (in / mm):
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15 x 1.25 / 381 x 31.75
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Wheel size & type:
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20-inch x 9-inch
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Tires:
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35-inch custom Bridgestone Dueler
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Wheelbase (in / mm):
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103 / 2616
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Overall length:
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171 / 4343
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Overall width (in / mm):
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81 / 2057
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Overall height (in / mm):
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72 / 1829
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Track (in / mm):
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67 / 1702 (front); 68 / 1727 (rear)
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Minimum ground clearance front (in / mm):
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13 / 320
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Approach angle (degrees):
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56
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Departure angle (degrees):
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51
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Breakover angle (degrees):
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25
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Grade capability (percent):
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60
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Side slope capability (percent):
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40
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Water fording capability (in / mm):
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24 / 610 (at 5 mph)
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Seating capacity:
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4
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