Alcoguard utilises fuel-cell technology - the very same technology that is used by most police forces in Europe. Before the car can be started, the driver has to blow into the wireless hand-held unit. This unit is the size of a remote control and it is stored and charged in a compartment behind the centre console. The driver's breath is analysed in the hand-held unit which then transmits the results via radio signal to the car's electronic control system. If the blood-alcohol limit of 0.2 g/l is exceeded, the engine will not start. Thanks to advanced sensors, it is not possible to use external air sources such as a pump to cheat the system.
"Fuel-cell technology is more expensive but it also produces far better results. Unlike semi-conductors, for instance, fuel-cells only react to ethanol and nothing else. In the fuel-cell, the ethanol molecules pass through a sensitive membrane and an electrical current is generated. This current is then measured. Higher current means more alcohol in the driver's breath," says Cecilia Svensson, Technical Manager for Alcoguard at Volvo Cars.
Thursday, March 6, 2008
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment