Audi is the latest automaker to announce its adoption of technology that could improve fuel efficiency of as much as 20%. Like Mazda, Audi is addressing one of the most wasteful areas of gas consumption in cars; idling.
Beginning sometime in the next few months, Audi will begin utilizing the latest stop-start technologies, regenerative braking and implement an onboard diagnostics system meant to either cut gas consumption automatically, or encourage better driving habits. One simple addition will be a gearshift indicator that informs the user when to shift for maximized fuel efficiency. Similar to the systems of other manufacturers, Audi’s start-stop system turns the engine off when the car comes to a full stop and the clutch is lowered. The engine engages again when the clutch is operated. Audi estimates a fuel savings of 0.2 liter per 100km and lowered carbon emission of up to 5g/km with this system alone. Specific recipients of this technology will begin with the A3, 2.0 A4 and A5 models, with other vehicles following later this year. Regenerative braking systems create electrical energy, saving fuel by reducing energy needed to be produced by the alternator. The A3 with manual transmission, A4, A5 and A5 Cabriolet equipped with the 2.0-liter and a manual transmission and the A6, Q5 and Q7, all come with this system as standard equipment already. With both technologies, Audi estimates a 20 percent drop of fuel consumption.