Audi Introduces Stop-Start and Energy Recovery Systems for 2009

 Audi Introduces Stop-Start and Energy Recovery Systems for 2009
Audi Stop-Start system instrument cluster display

Audi will introduce an onboard computer system fitted with something called the efficiency program as well as the familiar start-stop system. These technologies are part of the solutions that Audi will use to cut down fuel consumption levels by 20% on 2007 levels by the year 2012.

Additionally the energy recovery system is installed. It is already available as standard specification in a number of Audi models. What it does is to feed energy back into the vehicle's electrical system during deceleration in order to further improve efficiency.

The start-stop system works by shutting down the engine when the car comes to a halt. As the driver pushes the clutch the engine starts again. The system can be switched off manually at any time by pressing a button. Audi estimates that in the regular Euro cycle fuel consumption is lowered by 0.2 litres per 100km. C02 emissions are consequently reduced by 5 g/km. Cars that will receive the system first are the manual versions of the A3 1.4 TFSI, the A4 and A5 with 2.0-litre engines.

The onboard computer with the efficiency programme comes with consumption-related data that is shown on the centre display. Drivers are then given recommendations for more efficient driving, depending on their style and the prevailing road situation. There is even a gearshift indicator to prompt drivers to change gears at the most ideal gear times. Also, systems that require extra energy to operate, like the air conditioning and seat warmers, are identified by the efficiency programme.


Source: Audi
Published May 8, 2009 5:50 am By Thami Masemola
Posted in:

Driving efficiently: new technologies from Audi

* Start-stop system available from the second quarter of 2009
* Energy recovery: Audi models recover electrical energy
* Modular efficiency platform with further innovative technologies

Audi is consistently pressing forward to improve fuel economy and CO2 emissions. Starting in the second quarter of 2009, the modular efficiency platform will benefit from additional new technologies: The on-board computer with the efficiency program and the start-stop system will raise the efficiency and convenience of the Audi models to a new level. By 2012 the fuel consumption of the Audi model range should drop by 20 percent.

Audi's modular efficiency platform combines reduced consumption with great driveability and outstanding sportiness. And now Audi is bringing two additional efficiency technologies up to the starting line: the start-stop system and the on-board computer with efficiency program. These complement the energy recovery system, which already belongs to the standard specification of many Audi models and feeds energy back into the vehicle's electrical system during deceleration phases.

The start-stop system realizes its efficiency potential especially in urban traffic, significantly reducing consumption while relieving the driver: The system shuts down the engine once the car has come to a stop, the gear lever stands at idle and the driver releases the clutch pedal. Operating the clutch then starts up the engine again. The start-stop system is extremely quiet, convenient to operate, and fast: The engine returns to idle speed while the driver is shifting gears.

Audi combines the start-stop system with efficient battery technology and sophisticated energy management, to maintain functioning even at low temperatures. The system is inactive during the warm-up phase of the engine, so that the engine oil becomes warmer and the exhaust gas cleaning systems reach their operating temperature faster. The driver can also switch off the start-stop system at any time by pressing a button.

In the standardized driving cycle the start-stop system lowers fuel consumption by about 0.2 liters per 100 km, and therefore reduces CO2 emissions by around 5 g/km. The new system is being used for the first time in the Audi A3 1.4 TFSI with manual transmission and in the Audi A4 and A5 with two-liter engines and manual gearshift. Numerous other models will follow this year.

The second newcomer in the modular efficiency platform is the on-board computer with the efficiency program, an addition to the Audi Driver Information System. All consumption-related data appear in the center display, with recommendations for efficient driving - after all, up to 30 percent of fuel consumption depends on the individual driving style. The efficiency program continuously analyzes the energy consumption in the vehicle and gives the driver up-to-date tips for saving fuel, depending on the driving situation and driving style.

The newly designed gearshift indicator signals to the driver when to shift, for optimal fuel economy: A large and color-coded display indicates whether the right gear is engaged, or whether shifting would be practical for the sake of efficiency. Comfort features like air conditioning and seat heating also increase fuel consumption. A specially developed display in the efficiency program identifies the systems requiring extra energy and indicates their share in fuel consumption.

The energy recovery system already uses deceleration phases to convert kinetic energy into electrical energy. When the car accelerates again, the battery directs the temporarily stored energy back into the vehicle, to relieve the alternator and thereby save fuel. The energy recovery system is already standard equipment on the Audi A3 1.4 TFSI with manual transmission, the Audi A4, A5 Coupé and A5 Cabriolet with two-liter engine and manual transmission, the A6 and the Audi Q5 and Q7.

From innovative powertrain technologies to highly efficient air conditioning, the goal of the modular efficiency platform is to improve the entire vehicle's energy management. And Audi's efficiency technologies are systematically geared to the driver's needs.

The modular efficiency platform focuses on the further development of powertrain and transmission technologies, and the recovery and storage of mechanical, thermal and electrical energy. Audi also employs a host of measures to minimize driving resistance and optimize aerodynamics. These benefits are made tangible for the driver by a range of innovative assistance systems, with the standard specification of many current Audi models already featuring numerous efficiency technologies such as the Audi valvelift system, high-efficiency transmission and tires with optimized rolling resistance.

By 2012 Audi plans to lower the fuel consumption of its model range by 20 percent compared with the 2007 level. The brand will then have further enhanced its sporty and progressive profile, for efficiency and sportiness are inextricably linked at Audi.


Add comment

Comments (17)

 JamesBlon JamesBlon
June 10, 2009 3:05 pm
 TheKing TheKing
I knew it would just be a matter of time before the Copy King (Audi) copies BMW's inovations, like all other BMW innovations. I can tell you now that the next thing they will copy is BMW's interior design (like the 7 Series) and the night vision. Wait for it guys....
May 10, 2009 12:02 am
VW polo formel e, introduced 1983. Pre BMW! Technology evolves, especially when driven by competition
May 9, 2009 8:00 pm
 miladjuckel miladjuckel
May 9, 2009 3:12 am
 FP23 FP23
it's ridiculous to relate the efficienty efforts only to BMW They introduced these package on all their smaller cars like 1, 3 series, MINI (that sells a lot) which is really honorable, but now adopting similar system for other cars in other brands isn't copying, first because BMW didn't invent any of the system and of course the technology package is still marketing to let the brand shine in a "green light" ... on a BMW and aswell on an Audi An start-stop system won't save the world and an energy recovery system ... that story is as old as the hills (even before BMW came up with the idea to use it) and now outlined as an revolution.
May 9, 2009 12:22 am
 GermanCarsRule GermanCarsRule
a cheap copy of bmw.
May 8, 2009 8:36 pm
 automobile007 automobile007
i can't beleive they're only just adding this to Audi's. I assumed they already had it. I wonder how long it will be until a system is developed for automatics?
May 8, 2009 7:53 pm
 mroctober mroctober
I've seen this on a documentary. A small japanese firm has been pushing this technology for many years. Although the one I saw was a more rudimentary version. You'd need to tap on a small button on steering wheel to start/stop the engine, but same general idea.
May 8, 2009 7:23 pm
 sw1000 sw1000
I've been using this on my BMw 120d M sport for almost 2 years and it's fantastic once you get used to the engine turnign off. I'm surpirsed not all manufacturers have doen this already however it's good to see it becoming more the norm
May 8, 2009 5:07 pm
 mn07 mn07
BMW came up with this system frist
May 8, 2009 4:29 pm
 pscs pscs
well at least they're featuring on more and more brands. it's a good start. I just hope that this gimmick won't add too much cost to the vehicle.
May 8, 2009 1:15 pm
 BDSawicki BDSawicki
Well, I've recently seen similar systems on the new Toyota Auris ;)
May 8, 2009 11:54 am
 orlandocroccia orlandocroccia
Always good when it comes to reduce emissions, but a little late compared with other brands.
May 8, 2009 11:31 am