i-Eloop Mazda: Brake Energy Regeneration System

Basically the i-Eloop by Mazda is a braking system which continuously recovers kinetic energy as the vehicle decelerates and reuses it as electricity. This electricity is stored to be used later.

The electricity can be used to power the headlights, climate control, audio system, or other electrical equipment. This is a way to reduce the need for the engine to burn extra fuel in order to generate electricity and thus improving fuel economy.


There are three stages to i-Eloop: regeneration, storage and use. What makes the Mazda system stand out is that is utilizes variable voltage alternator and low-resistance, high-capacity electric double layer capacitor (EDLC). Conventional alternators charge at around 12 volts (V), however i-Eloop's variable voltage alternator can vary its output voltage from 12 V to 25V in response to the voltage level of the capacitor and making it possible to continually supply electricity to the capacitor.

Mazda is leading the industry when it comes to regenerative braking systems. The balance between the accelerator being on and off to create an engine which is relieved from the task of producing electricity. This means better fuel economy all around.

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