
The Advanced Configuration Group Automotives Division All-Terrain Roving Vehicle Fourth Generation (A-TRV G4) is a large size luxurious survivable high-performance off-road vehicle. It has a length of 6.00 m (19 ft 8 in), a body width of 2.20 m (7 ft 3 in), a standard unladen height of 2.70 m (8 ft 10 in) with the main spoiler-airbrake fully extended. The vehicle has a long wheelbase of 3.70 m (12 ft 2 in), a front and rear overhang of 0.92 m (3 ft 0 in) and 1.38 m (4 ft 6 in) respectively and a front and rear wheel track of 1.865 m (6 ft 1 in). Minimum ground clearance of the vehicle is 0.30 m (11.8 in) and its operational weight is 2 150 kg (4 740 lb).
The propulsion system of the vehicle consists of two sections. The main engine employs a spatially efficient 45° X-16 diesel engine, mounted longitudinally along the front-rear axis of the vehicle. The engine displaces 10.179 liter (621 cu in) on a bore of 9.00 cm (3.54 in) and a stroke of 10.00 cm (3.93 in). The engine features a compression ratio of 22.7:1 for optimum combustion. The valvetrain of the engine is of fully electric, rotary intake valve with fractal injection system for fine atomization and distribution of combustion mixture. The exhaust gas was ducted away from the engine through full-bore rotary-type valves. Maximum power and torque of the engine are 2 177 kW (2 920 hp) at 335 rad s-1 (3 200 rpm) and 6 125 Nm (4 516 lb·ft) from 110 rad s-1 (1 050 rpm) to 335 rad s-1 (3 200 rpm). The auxiliary power unit (APU) is used to drive vehicle accessories such as cabin climate-control system and electric generator. It is a conventional inline four cylinder engine with a rating of 185 kW (248 hp) and is mounted transversely.
Various power augmentation systems are used in the propulsion system. The main engine and APU have turbo-supercharger which operate at a maximum boost of 30 lb and 15 lb respectively. The thermo-supercharger effectively removes heat from the engine and used it to do work by means of fluid. The thermo-supercharger drives the vacuum chamber. Vacuum chamber builts up vacuum and is linked to the exhaust system during exhaust stroke, creating a strong suction effect such that the engine is performing work on exhaust stroke. Spool accelerator, which consists of turbines of which combustion mixture are sprayed into and combusted, creating extra force to accelerate the engine to a higher rev range quicker and providing more torque when swift acceleration is needed.
The driveline mainly consists of the transmission, transfer case and differential gear. The transmission is of Chain Drive Continuously Variable Transmission (CVT) type with hydraulically-driven retarder. The transmission has four sets of chain-linked infinitely-variable-radius gear to provide a range of ratio from 16.00:1 to 0.125:1. The transfer case further provides two selectable gear ratio of 0.870:1 and 3.269:1 reduction. The center, front and rear differentials feature gearsets similar to those of Chain Drive CVT and each has a fully integrated differential lock. An AC Electronics MP-800 CPU controls the entire propulsion and driveline system through embedded circuits while another similar processor is on constant readiness for takeover in cases of failure while performing quadplex data parity check and backup.
There are three subsystems within the braking system. The contactual braking subsystem consists of advanced carbon ceramics 483-mm (19 in) ventilated disc brakes with liquid nitrogen cryogenic cooling system. These brakes work only during abrupt and high-speed braking. The main brake force is provided by four Electromagnetic Contra-Rotating (EMCR) brakes. The brake are sealed off from the surroundings and share the same cooling system as that of disc brakes. The brakes incorporated a proprietary antilock braking system where the brake can be released up to 600 times per second, greatly reduces the possibility of brake lock-up and overheating during heavy braking. At very high speed, the aerodynamical braking subsystem complements the former subsystems through air drag generated by the airbrake prominently mounted on the top of the roof. The airbrake works doubly as aerofoil to provide optimum downforce or lift so as to stabilize the vehicle cruising at very high velocity.
The vehicle is built from a single-piece carbon-fiber chassis, with no welding or bolt-on of any kind, which greatly increases its strength. The chassis is reinforced by a zirconium-titanium alloy framing that is highly corrosion resistant and is capable of withstanding a 1-megaton nuclear attack 200 m from ground zero. External replaceable kevlar airbags further enhance collision safety as well as protects the vehicle from projectile attack. In addition, there are 128 airbags found within the interior of the main cabin and compartments to ensure the survivability of passengers and components located within the volume. Survivability are further enhanced by the self-containing air filtration, regeneration and pressurizing system. All passengers are seated on Martin-Baker reinforced seat with crash protection system that is fully power adjustable and featuring such comfort features as heating, ventilating and massaging.
The performance of the vehicle is spectacular. The 0-100 kph acceleration can be accomplished within a modest 2.3 seconds so as to prevent the passengers from feeling too uncomfortable. Straight line acceleration of 0-1 000 m from and to rest takes 12.87 seconds. The vehicle can travel up to 1 600 km on a single tank of diesel.