Nov 19, 2009

World’s Fastest Diesel Car – JCB DieselMax

 JCB's DieselMax Fastest Diesel Car

This is JCB’s Dieselmax owns the record of world’s fastest diesel car with 350.092 mph / 563.41 kph. The previous diesel land speed record is 236mph (380km/h), set in August 1973. The Dieselmax car is powered by two turbo-charged JCB engines built at the company's plant at Rocester. JCB's Dieselmax World's Fastest Diesel Engine

JCB's Dieselmax Cutaway

Dieselmax is also the first car designed entirely by computer. To facilitate visualization of the overall car, Piper's team generated a highly detailed 2D electronic computer model of the car, revealing all of its components to help to identify the fit and practicality of each in relation to the others. A full-size mock-up was then built for final verification of all aspects of the concept before work started on the real car.

 JCB's Dieselmax CFD Analysis

The Dieselmax's bodywork was designed by Ron Ayers, who shaped both the Bloodhound missile and Thrust SSC. The body is of carbon fibre, covering a square-tube space frame chassis.'The shape is long and low,' Leverton explains, 'but not as thin as we'd like because it's driven by the integration of the chassis and the engine. The under floor shape is critical because we want neutral lift and no down force. There are no radiators because they generate drag.' (Hence the ice-cooling.) 'The ride height is critical, as is the shape of the inner wheel arches at the front,' adds Leverton, pointing out that there will be salt spray at Bonneville, making clever wheel arch aerodynamics vital to divert the front wheels' spray away from the rear wheels to maximize traction on the powdery surface.

Engine Details

JCB 444 common rail injection diesel, bored and stroked to 5000 cc, dry sumped and inclined at 10 degrees. Twin compound turbochargers with twin compound intercoolers. Ice tank cooling (capacity 180 liters) with power of 750 bhp (560 KW) at 3800 rpm and torque 1105 lb.ft (1500 Nm) at 2000 rpm.

Gearbox Details

Forward transmission and final drive connected to forward engine; rear transmission and final drive unit connected to rear engine. Six-speed barrel-shift transmissions driven through torsional dampers and oil-immersed multi-plate clutches.

Two six-speed bespoke gearboxes are employed, one for each engine. The gearbox is mated to the engine using a JCB designed stepper gearbox arrangement utilizing oil-immersed multi-plate clutch packs from JCB's flagship 3CX Backhoe Loader. A torque tube encloses the gearbox and connects the final drive to the rest of the driveline. Gear shifting in both boxes is synchronized and controlled electronically with shift actuation via steering wheel-mounted paddle switches. Traction control will not be used, not just because it is outlawed by SCTA-BNI regulations but also because the aim all along has been to keep the car as simple as possible and the low Mu factor (coefficient of grip) of the salt will preclude very hard acceleration, which might induce wheel spin.

Other Specs of Dieselmax

Fuel Tank Capacity:- 9 liters

Steering:- Rack and pinion, to front wheels

Brakes:- Split circuit; unique design carbon rotors and twin stators.Exhaust brakes for front and rear engines, manually operated twin parachutes.

Suspension:- Independent all round via twin wishbones, coil springs and hydraulic dampers

Chassis:- Hybrid square steel tube space frame with bonded carbon composite panels

Body:- Aerodynamically designed - cdA <0.15m2; carbon composite materials

Wheels and tyres:- 23 x 15, Goodyear

Length:- 9091mm

Width:- 1145mm

Height:- 979mm(to top of canopy, at run speed) 1337mm (to top of fin)

Front Track:- 800mm

Rear Track:- 600mm

Wheel Base:- 5878mm

Weight:- 2700kg including fuel, oil, ice and water coolant and driver

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