GM Holden designers race into future

This post was written by AME

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GM HOLDEN DESIGNERS RACE INTO THE FUTURE WITH BATHURST TIME ATTACK CONCEPT CAR

Coinciding with the 50th anniversary of Holden’s first win at Bathurst in 1968, GM Holden’s Design Team has explored the technological potential of the future through the stunning virtual ‘Time Attack Concept’ racer – conceived and executed entirely in-house at GM Holden. 

Unlike the conventional format of the current endurance race cars, the Holden Time Attack Concept racer is envisioned as a single-lap tearaway, pitted against the clock. This type of racing is commonly known as Time Attack in motorsport circles. 

The Holden Time Attack Concept racer was developed entirely virtually, using sophisticated simulation technology and driven by the world-class expertise within GM Holden’s Melbourne Design Studio. 

GM Holden’s Design Director, Richard Ferlazzo explains: “The technology we employ today has transformed the way we design cars. We have the ability to simulate a car’s appearance, technology and dynamics in convincing animations, which enables us to deliver better designs in a shorter time. A large part of our work is Advanced Design and we use this technology to develop concept designs for our parent company, General Motors. This concept is a digital advertisement for the advanced skills, capability and technology of the GM Holden team”. 

Holden has a long and storied history of creating crowd-pleasing concept vehicles dating back to the iconic Holden Hurricane concept of 1969, with traditional motor shows the typical platform for debuting them to Australia. As times have changed, so has Holden’s approach to developing concept vehicles. 

Weight:

900 kilograms (without driver)

Technical Highlights

Performance:

Simulated Mount Panorama Lap Time: 1:29.30

0-100km/h: 1.25 sec

Top Speed: 480km/h

Maximum Lateral G-Force: 6.5G

Maximum Braking G-Force: 6G

Powertrain:

Motors:

250kW Axial Flux Permanent Magnet Electric Motor Drives x 4 (Inboard mounted)

Total output – 1000kW (1Megawatt) / 1340HP

3240Nm Total Motor Torque

5000RPM Maximum Revolutions

Enables full programmable Torque Vectoring Traction Control at each corner

Gearboxes:

3-Speed Planetary Automatic Shift Gearboxes x 4

Ratios 1st 2.97:1, 2nd 1.7:1, 3rd 1:1

First gear ratio enables 9620Nm total axle torque at launch

Gearbox casing integrated into Chassis structure

Power Source:

Reconfigurable Graphene Hybrid Power Pack

1MW power output, 90MJ Usable Charge Capacity

Fast Recharge: Fully recharged in 90 seconds (1000kW, 800V, 1250A)

Motor Cooling:

Longitudinal Heat Exchangers x 2

Liquid-to-Gas Phase Change Cooling, low drag, full pass-through

Brakes:

Carbon/Carbon Hydraulic Discs x 4

Electrical Heating of pad and rotor in pits and on out-lap to conserve energy

Full Regenerative capability on all axles, can provide up to 2.0G braking force

Structure:

Chassis:

Carbon Fibre composite with cellulose Honeycomb Core

Full Integrated safety cell and crash structure, utilising stressed powertrain components

Suspension:

Carbon Fibre Double Wishbone all-round, aerodynamically engineered profiles

Titanium CNC’d Uprights with bushed underbody mounts

Pushrod / bellcrank activated Hydraulic Active Suspension Actuators. Computer controlled programmable ride height adjustment, anti-dive, anti-squat, anti-roll

Electric Power Steering

Body:

Carbon-Fibre/Kevlar Composite panels with Polycarbonate Graphene Coated Upper

Underbody:

Full Carbon Fibre / Kevlar Composite quad-venturi underbody, with flexible co-moulded membranes at Body and Chassis junctions

Underbody is structurally mounted to Suspension uprights at all 4 corners, enabling full aero load to be applied directly to each wheel

Torsional twist capability enables underbody to maintain consistent relationship to ground even with extreme road camber change

Wheels:

310/700 R18 Slick tires all round

Carbon Fibre Composite Rims

Active Wheel Fairings support low drag or brake cooling positions

Wheel Fairing supported by a Kevlar/Elastane woven skin enabling consistent low drag performance whilst supporting full wheel steering and suspension movement

Aerodynamics:

Low Frontal Area with all powertrain components on centre-line in Driver’s frontal area ‘shadow’

Full Active Downforce Generation via Ground Effects technology

Ultra-high Downforce levels achieved via electrically powered Cyclo-gyro fans

Rubber Skirts control air-bleed and enhance Ground Effect

4 Individually controllable Fans accelerate airflow through 4 venturi tunnels to enhance downforce at lower speeds

Fans enable programmable and constantly tuneable centre-of-pressure

Cyclo-gyro fans with actuated blades enabling variable thrust direction and force

Fans powered by 4 Switch Reluctance Motors (SRM), each up to 50kW, 50,000rpm, 92% efficient

Hydraulically actuated variable-position rear wing with air-braking capability

Lift-drag Ratio of underbody aero components in excess of 90:1

Miscellaneous:

Front Lighting:

Active Matrix Laser Units with yellow ‘Endurance’ Tint

Rear Lighting:

LED Matrix display – programmable pixels

Driver Assistance:

Augmented Reality Helmet: 3D graphics projected onto helmet visor to enable graphics overlay in real-time. Essential technical information provided in addition to racing line and braking zone benchmarks.

Integrated full steering wheel inputs to control all mechanical and aerodynamic systems via presets.

Six Point safety harness.

Telemetry and Camera mast to enable constant uplink and data transmission and in-car filming

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