Print 55 comment(s) - last by EricMartello.. on May 15 at 1:55 AM

First time eDrive and xDrive tech has been combined in one vehicle

BMW has unveiled the Concept X5 eDrive, which will be showcased at the New York International Auto Show. Although the vehicle is labeled as a concept, it’s a dead ringer for the production plug-in hybrid version of BMW’s popular crossover that it plans to bring to market sometime within the next year or two.
The hybrid drive system gets its primary motivation from a 245hp turbocharged 4-cylinder engine. That gas engine is combined with a 95hp/184 lb-ft electric motor developed by the BMW Group. Power for the electric motor comes from a lithium-ion battery pack (which is mounted under the cargo area) that can charge from any wall outlet.
The Concept X5 eDrive can drive on electricity alone for up to 20 miles at speeds up to 75 mph. BMW says that the car will have an average fuel consumption of over 74.3 mpg in the EU testing cycle (which means we’ll likely see less than half of that quoted figure under EPA guidelines). BMW says that the X5 concept can reach 62mph in under 7-seconds.

The Concept X5 eDrive is the first from BMW that uses its xDrive all-wheel-drive system paired with eDrive hybrid technology.
The concept also has a ConnectedDrive system that helps plan routes and lists the location of charging stations on the GPS map. This allows the driver to find a charging station when they are around town in electric mode.

Source: BMW

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RE: Tesla!
By EricMartello on 4/15/2014 9:04:00 PM , Rating: 2
Of course it is. For engines with the same peak power, constant power with declining torque is far more useful than flattish torque and rising power.

You can only have constant power with declining torque, since power is calculated from engine speed times torque. This is true for all engines.

WTF is "typical"? Some POS from Home Depot? That's not where automakers get their engines, genius. Once again, you're using a 15% efficient engine for no reason.

Yes, I listed a typical generator. The one you linked to in desperation to prove me wrong only highlights the fact that you brain is the size of a grain of rice.

The minimum fuel consumption does not equate to actual 'full load' fuel consumption. Fuel consumption for a given load increases as the generator capacity increases. You linked to a generator whose peak sustainable output is 7 kW, and running it at its peak output for the 11 hours you'd need to charge an 85 kW/h battery will require.

Even if we use your unrealistic 11 oz / kWh consumption at full 7 kW load figure, that's 77 oz per hour or 6.6 gallons.

Congratulations, instead of 1 MPG you are not talking 4.5 MPG (unless you drive < 55 MPH and never have to stop-n-go). This doesn't even factor in weather, where extreme hot or cold can have a drastic effect on range.

What on earth makes you think a car needs 85kWh to travel 30 miles? The Tesla does well over 200 with that much energy, even under bad conditions.

What on earth makes you keep citing the 200 mile range that even tesla's own website indicates is below 55 MPH. Any car driven conservatively on a highway at a constant speed can achieve longer ranges. Mixed use is not going to be anywhere near 200 miles...but hey, you probably believe in global warming and income inequality so why not believe that your electric car can go 200 miles on a charge in real-world driving conditions.

Once again, no PHEV charges up the battery with the generator. The electricity drives the wheels, and only a trickle goes in to balance the occasional battery draw.

Just shut up; seriously, you have no idea about how these things work and you have terrible reading comprehension. Maybe wipe the jizz off of your douchey thick-framed glasses.

WTF are you talking about? Round trip efficiency for lithium ion is 90% efficient.

Why are you asking me what I'm talking about when it's quite obvious to anyone who graduated high school?

Efficiency is the difference between input energy vs how much of it is converted to usable work.

Let's just say that that 90% of the electricity a charger draws is stored in the battery...that means charging your 85 kW/h batteries would require (85 * 1.1) 94 kW of electricity.

Now, when you drive, your batteries' effective capacity fluctuates based on how much current is being drawn from them. Drawing a high current, i.e. hard acceleration, will cause your batteries to lose more of their stored charge than applying moderate current draws.

This means that if you ran the engine at its full power to utilize that power you paid for, the engine will use up to 310 kW of power, drawing nearly 800 amps from the batteries. The higher discharge rate lowers the available capacity, even if you fully charged them, meaning that you would expect fully charged 85 kW/h batteries to last about 15 minutes under full load, but in reality, they would probably be spent in about 6-7 minutes - meaning you lose about half of your rated capacity.

Not really going to spend more time to explain how discharge rates affect battery life...suffice it to say that if you're dumb enough to buy into the hype then you deserve to suffer the limitations that come along with driving an electric car.

Seriously, where on earth are you getting all this nonsense from? Is there some website polluting your mind?

If you were smart enough to understand what I'm saying you probably would have realized that electric cars, as they are today, are at best a toy for some rich kid.

"Young lady, in this house we obey the laws of thermodynamics!" -- Homer Simpson

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