Mazda will use brake capacitors to increase fuel efficiency by 10% image

Mazda Motor Corp., on Friday said it has developed i-ELOOP — the world’s first capacitor-based regenerative braking system for a passenger vehicle. The system will debut in its vehicle range in 2012.

According to the Japanese automaker, i-ELOOP will help Mazda vehicles to achieve a better fuel economy – as much as 10 percent more compared to battery based system.
The idea is that capacitors can be charged and discharged rapidly and are resistant to deterioration through prolonged use.

The capacitor, which has been specially developed for use in a vehicle, can be fully charged in seconds.

The system features a new 12-25V variable voltage alternator, a low-resistance electric double layer capacitor and a DC/DC converter.

Mazda said the new breaking system would boost fuel efficiency by 5 percent under Japan’s official standards, but double that number in real-world driving situations with frequent breaking, when air-conditioning and other electronic devices such as audio systems, or seat heaters are used, a spokesman said.

Mazda’s i-ELOOP is designed to work alongside i-stop idle-stop technology, allowing the engine to remain switched off for longer periods.