BMW Efficient Dynamics Animation - IAA Frankfurt 2007

[mcdemba]

1 thing disturb me with hybrid cars

80% of the wear occurs when shutting on and off an engine

Hybrid technology is all about turning on and off the engine to increase the efficiency

[ELBrisco]

Diese Erfindung ist nicht neu. VW hatte das mal vor über 10 jahren für den Golf 3 im Programm "den Ecomatic".

[ChrisLuxembourg]

...und bei Citroen gabs das vor 30Jahren, es wurde aber abgeschaft weil der Motor beim starten mehr verbrauchte wie wenn er normal durchläuft. Besser wäre da schon ein Elektroauto, aber das möchte die (Öl)Industrie noch nicht so richtig.....

[expert1221]

Whew! - Brake electrical Regeneration, No Load Alternator, Electric Motor between engine and Transmission, electronic Steering, A/C compressor disconnect, aerodynamically controlled brake flaps, Etc.... Need to do some more reading on this one..

[sundog47]

Just imagine the stories that mechanics will come up with to cover their total confusion. Just sharpen the fan blades, rotate the flywheel, flow test the radiator hoses, and re-alternate the alternator. Why the hell did I ever sell that 66 GT-350 ?????

[expert1221]

A Better invention would be to have the engine idling on half the cylinders all the time and charging the batteries for your electric car until you get above, like 30mph and then have the engine take over. It would take me a long time to get used to the stalled engine restart concept.

[usageee]

I wonder if start-up would be as instantaneous after a few years of ownership. Also, is this feature optional for the driver; id est, "on/off" switch?

[cuddlyable3]

strawgate is right, the video shows the tachometer falling to 0 rpm when a car waits at a red light. However stalled idle is not a new idea, and the little fuel saved is offset by much more wear on the starter motor and gear. This would not be good for a cold engine on a cold morning. BTW the cutaway engine simulation could be even nicer if it showed the transmission internals.

[sundog47]

Old science: 1 restart= 30seconds of unloaded idle.

Fuel mapping for stoichiometric engine balance requires enrichment for restart, and stable idle,

thereby consuming a larger volume of fuel than continued idle for the same period of time.

[MushroomKingdoom]

Is not just luxury, its eficient.

[cuddlyable3]

The BMW simulation needs explanation: what is going on with the battery?

[Strawgate]

It looks like the BMW charges the battery when the gas engine is running, but the battery runs the wheels when the car stops, so you aren't idling when you stop, instead the entire engine stops and you save a LOT of fuel.

[GNStudios]

bmw rules! the same can´t be said about american cars...

[001FJ]

BMWs never cease to amaze me whether regarding their design (looks) or their engineering (technology)!

[sundog47]

You do of course realize that the "no-load idle shut down" design was patented by Ford in the 80's and that BMW shares patents too numerous to name from Mercedes Benz, Volvo(Ford), General Motors(USA) and Saab(GM). I hope this clears things up a little for you, like the window wipers designed by Duesenberg in the 20's.

[001FJ]

What does the "no-load idle shut down", and window wipers have to do with Efficient Dynamics?

[sundog47]

001FJ Who said anything about efficient dynamics?

I'm just pointing out that a great deal of the tech involved in the BMW product is industry standard and was not developed at BMW. Now I am not bad mouthing the company or Germans or anyone, but it is interesting that accomplishment kudos are often a matter of National pride and not reality.

[babyaiko]

cool