 |
|
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PAC-Car II vs PAC-Car I
| PAC-Car I | PAC-Car II | |
 |
 |
|
| Architecture | ||
| Wheels arrangement |
2 front steered wheels 1 rear powered wheel |
2 front wheels (tilted) 1 rear steered and powered wheel |
| Body Shell |
Body and chassis separated. Chassis: polyurethane foam and carbon-epoxy sandwich Body: glass fibber-polyester |
Chassis integrated in the body. Carbon-epoxy. |
| Steering interface | Handlebar | Joystick |
| Breaks | Double hydraulic brake system (shoes on the rim) | Double hydraulic disk brake system |
| Dimensions | ||
| Length [m] | 2.50 | 2.78 |
| Width [m] | 0.70 | 0.57 |
| Height [m] | 0.75 | 0.61 |
| Track width [m] | 0.60 | 0.50 |
| Wheelbase [m] | 1.70 | 1.50 |
| Weight (ready to race) [kg] | 73 | 32 (Nogaro), 29 (Rockingham) |
| Frontal area [m²] | 0.45 | 0.254 |
| Cd | 0.16 (real car measured in a wind tunnel) | 0.075 (real car measured in a wind tunnel) |
| Tires |
Michelin radial 45-75R16 Rolling resistance coefficient: 0,001 |
Michelin 35-406 with tube (Nogaro) Rolling resistance coefficient: 0,002 Michelin radial 45-75R16 (Rockingham) Rolling resistance coefficient: 0,001 |
| Fuel cell system | ||
| Stack |
PEM Fuel Cell PSI technology (with embedded humidification area) 18V - 900W - 9.3 kg |
PEM Fuel Cell PSI technology 18V - 900W - 4 kg New membrane generation Custom made endplates |
| Hydrogen tank |
One metal hydride canister (HERA) 16g of hydrogen |
Two pressured tanks (Carbagas from Air Liquide) 2g of hydrogen at 11bars |
| Motor and transmission | ||
| Power electronics | From the Powerpac project | Custom made |
| Motors | Two standard DC motors (Faulhaber, 18V, 150W) | Two customized DC motors (Maxon, 18V, 150W) |
| Transmission |
Belt and freewheel Speed ratio 17 |
Gear pair (can be open) Speed ratio from 16 to 22 (depending on the track) |
| Performances | ||
| Tank to wheel efficiency | 25% (estimated) | 50% (target) |
| Fuel consumption |
2024km/l (5718mpg) Shell Eco Marathon - July 2004 Rockingham motor speedway |
5385km/l Shell Eco Marathon - June 2005 Michelin Technology Centre, Clermont Ferrand |
| Official results | ||
| French Shell Eco-marathon Nogaro motor circuit |
9th overall - May 2004 |
1st overall - May 2005 |
| Shell Eco Marathon Rockingham/Ladoux | 3rd overall - July 2004 | 1st overall - June 2005 |
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!!! Dieses Dokument stammt aus dem ETH Web-Archiv und wird nicht mehr gepflegt !!!
!!! This document is stored in the ETH Web archive and is no longer maintained !!!
!!! This document is stored in the ETH Web archive and is no longer maintained !!!
