A Look at Efficient Dynamics - BMW 4-Series Forums
 
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post #1 of 9 Old 11-04-2013, 03:28 PM Thread Starter
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A Look at Efficient Dynamics

What is Efficient Dynamics, what are Efficient Dynamics? I can understand your confusion. Efficient Dynamics is not simply a feature or a single component, but a cohesion of several technologies and ideals to create a product arguably better than the sum f its parts. 2+2=5.

It all started with the BMW 303:



The 303 was BMWs first vehicle to feature a chassis made up of innovative (at the time) tubular side members and box section cross members in an attempt to lower weight that would use less fuel. This was back in 1933.

The lessons learned from the 303 were carried over to the BMW 502 which went a step further than the 303 and began using light alloys for engine construction.



BMW produced its first electric car in 1972 for the Munich Olympic games. Based on a BMW 1602, complete with 771 lbs of lead batteries and a range of 37 miles, just enough to trek from BMW HQ to the stadium.



Further forays into electrocution occured in 1975, 1987, 1991 and 2010...

Which brings us to current day Efficient Dynamics. As mentioned above, Efficient Dynamics is not just one component, but cohesion of components, materials and mindsets to lower emissions and streamline aerodynamics.

Some components of Efficient Dynamics are standard across the BMW lineup. Slits on the front fenders decrease drag coefficient, air curtains, variable valve timing and variable valve lifting (VANOS and VALVETRONIC) and stop start.



At high speeds the air breathers open to A) cool the engine better and B) increase airflow through the front of the vehicle.

BMW is rapidly approaching elimination of N/A engines from its lineup, opting for what BMW calls TwinPower Turbo. TPT is a combination of direct injection, control of air delivery and VANOS/VALVETRONIC.



Through research BMW has discovered that 500cc is the optimal displacement for a cylinder to offer the best balance between noise, vibration, efficiency and friction. Under efficient dynamics all future BMW cylinders will be 500cc's.

The crown jewel of Efficient Dynamics is the development of Carbon Fiber Reinforced Polymer (CFRP). CFRP has the same torsional resistance as conventional steel yet weighs over 50% less. BMW is making use of other leight weight materials as well, magnesium, light plastic, light bolts and gorilla glass can all be found peppered through out the BMW lineup.

One quite fascinating feature is the Coasting Function embedded into BMW ECO PRO mode. Coasting Function unhooks the gearbox from the engine at speed between 30-100 mph, when you take your foot off the accelerator the car will coast for maximum distance with minimal amount of friction.



Whats next Hydrogen, Water powered, Solar powered? The future is farther off than we think, but for now, all this coming to a 4 series near you.


Last edited by bird; 11-04-2013 at 03:30 PM.
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post #2 of 9 Old 11-05-2013, 10:31 AM
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efficiency is the new trend.

the entire industry is moving toward efficiency.



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post #3 of 9 Old 11-05-2013, 12:35 PM Thread Starter
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Originally Posted by cfrp View Post
efficiency is the new trend.

the entire industry is moving toward efficiency.
agreed, but the entire industry hasn't been conducting research since the 1930's... I'll give it to BMW their entire existence has been dedicated to innovations in materials and construction. a fully electric car in the 70's with a similar range to modern EV's... Impressive yes?
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post #4 of 9 Old 11-05-2013, 03:18 PM
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I think even the E34 BMW M5 had specially designed wheels that did a lot for guiding air to it's brakes and more. Crazy. Go BMW!



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post #5 of 9 Old 11-05-2013, 04:58 PM
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I'd agree with the efficiency thing. Its not about the engine or aerodynamics or electric power. It is about making the most efficient vehicle possible using whatever technology you need to. This must be balanced with comfort, performance, etc... but that is basically the goal at this point.

Its cool to watch the videos of cars in the wind chamber with the smoke or water vapor to shows how the air is moving.
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post #6 of 9 Old 11-06-2013, 01:42 PM
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Quote:
Originally Posted by mr.smith View Post
I'd agree with the efficiency thing. Its not about the engine or aerodynamics or electric power. It is about making the most efficient vehicle possible using whatever technology you need to. This must be balanced with comfort, performance, etc... but that is basically the goal at this point.

Its cool to watch the videos of cars in the wind chamber with the smoke or water vapor to shows how the air is moving.
it's why people dislike american cars for a while. they were just big heavy and ugly cars with big engines, meanwhile BMW's were always finely tuned and perfected and efficient.



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post #7 of 9 Old 11-06-2013, 04:26 PM
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It made sense that people were not liking American cars right before 2008. Hummers, Escalades, etc... These vehicles are just far too much vehicle for people.
@mr.smith do you have a video of this wind tunnel thing for us to see?
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post #8 of 9 Old 11-07-2013, 01:18 PM Thread Starter
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Originally Posted by Sweet Tooth View Post
It made sense that people were not liking American cars right before 2008. Hummers, Escalades, etc... These vehicles are just far too much vehicle for people.
@mr.smith do you have a video of this wind tunnel thing for us to see?
people would still be buying hummers if the government didnt force GM to shutter them. People bought hummers, alot of people bought hummers. Even more bought escalades and still continue to buy escalades.

the top selling vehicles in america are pickup trucks... people didnt care about efficiency until they realized gas was never going back to $2/gallon...
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post #9 of 9 Old 11-07-2013, 02:42 PM
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Quote:
Originally Posted by Sweet Tooth View Post
It made sense that people were not liking American cars right before 2008. Hummers, Escalades, etc... These vehicles are just far too much vehicle for people.
@mr.smith do you have a video of this wind tunnel thing for us to see?
it wasn't just those niche cars but even mainstream cars like the Impala, Malibu, Buck Regal, etc. They could have been much more refined and better in so many ways.



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