X5 BMW X5 Vision EfficientDynamics Concept @ Geneva

BMW X5 Twin Turbo Diesel Hybrid Concept

We finally managed to discover BMW's mystery concept car for the Geneva Show (see here): it's the “Vision EfficientDynamics”, or as we prefer to name it, the X5 2.0-liter Twin Turbo Diesel Hybrid Concept. The prototype model offers an insight into BMW’s EfficientDynamics technologies that are set to find their way into production models in the near future.

The X5 Concept combines BMW’s all-new, twin-turbocharged 2.0-liter 4-cylinder diesel engine with a compact generator that, for the first time, is flange mounted directly onto a new eight-speed automatic gearbox. The 2.0-litre diesel engine delivers 204hp and 400Nm of torque between 2,000 and 2,250rpm while the mild hybrid concept generates a further 20hp and 210Nm of torque under acceleration.

According to BMW, while the Vision EfficientDynamics concept completes the sprint from zero to 62mph in just 8.9 sec it boasts an avg. fuel consumption of 36.5 MPG (US) or a mere, 6.5-liters per 100 km and just 172g/km of CO2 emissions.

Apart from the hybrid system, the prototype also features a Brake Energy Regeneration system which utilizes highly efficient lithium-ion batteries in the boot area to store the power generated which can be used to power the air conditioning, electric coolant pump and the electric power steering system.

Additionally, the prototype X5 is fitted with roof mounted photovoltaic solar panels, measuring 1.0 square meter. The energy generated can either be used immediately or stored for later use. Importantly, the power created in this zero- CO2 way can be used to pre-heat the diesel fuel. The less efficient warm-up phase is thus shortened considerably.

The chassis and ride-height of the X5 have also been adapted for the BMW Vision EfficientDynamics. This includes the aerodynamically-efficient but gargoyled 19-inch light alloy wheels with reduced ventilation.

[Source: CarScoop]

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Nice!

4 cylinder diesel + mild-hybrid drive = too bad Lexus... We are fuel-efficient affected by CO2 nanism, you are a marketing-efficient gas-guzzler...

A downsized diesel and mild-hybrid motor is the best of both world, for combustion engines, imo.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Nice!

So combined, this car has more newtonmeters than the new 4.4 biturbo V8....

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Yup, I always wondered why there were no diesel hybrids - would be the best combination for an economical engine. But I wonder why put it in a X5 first, why not something lighter like 1er or even X3 - may be it will debut with X1. But what I really hope is this engine makes it to Mini. With that weight, would be fantastic performance and fuel economy.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

a 2 ton SAV that gets 36.5mpg, not bad huh. That sun roof thing is pretty cool.

So a few years ago, I went to an event sponsored by Ford, GM, Cummins etc at Virginia Tech. In one of the sessions, the engineers from Ford asked us what kind of technology would be available in 5 to 10 years. I said a diesel hybrid and they just kinda laughed at me... bunch of morons, haha. Way to go BMW

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Wow, I hope this makes it into production soon with other BMW models and engine variations, like the 35d.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

warot said:

a 2 ton SAV that gets 36.5mpg, not bad huh. That sun roof thing is pretty cool.

So a few years ago, I went to an event sponsored by Ford, GM, Cummins etc at Virginia Tech. In one of the sessions, the engineers from Ford asked us what kind of technology would be available in 5 to 10 years. I said a diesel hybrid and they just kinda laughed at me... bunch of morons, haha. Way to go BMW

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And now they are very surprised to loose money and marketshare faster than the Mustang or Corvette can accelerate from 0 to 100km/h...

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva



Press Release
BMW Vision EfficientDynamics Concept Revealed

Offering an insight into the future of BMW’s innovative EfficientDynamics technologies

The Geneva Motor Show (4 – 16 March) will mark the world premiere of the BMW Vision EfficientDynamics, a concept car designed to showcase the future direction of BMW’s performance enhancing and emissions lowering innovations. Mild ActiveHybrid technology is combined with a twin-turbocharged four-cylinder diesel engine, a new eight-speed automatic gearbox and even roof-mounted solar panels, and all shrouded in a BMW X5 body.

All of these technologies combine to deliver the best fuel economy and lowest emissions of any large 4x4 currently on sale. The BMW Vision EfficientDynamics delivers 43.5mpg on the combined cycle and just 172g/km of CO2 emissions. However, these frugal figures do not translate into low performance figures. With its twin-turbocharged two-litre diesel engine delivering more than 100hp per litre, the BMW Vision EfficientDynamics concept completes the sprint from zero to 62mph in just 8.9 seconds, a time faster than most current production competitors.

The 2.0-litre four-cylinder diesel engine in the BMW Vision EfficientDynamics uses BMW’s Variable Twin Turbo concept, third-generation common-rail injection and an all aluminium crankcase to deliver 204hp and 400Nm of torque between 2,000 and 2,250rpm. The engine is supplemented by a mild hybrid concept that delivers a further 20hp and 210Nm of torque under acceleration. As a consequence, even though the BMW Vision EfficientDynamics features a relatively small capacity engine, it delivers nearly the same levels of horsepower as the conventional X5, but offers improvements in its already class-leading consumption and emissions figures.
The mild hybrid solution in the BMW Vision EfficientDynamics uses a compact generator that, for the first time, is flange mounted directly onto the gearbox. This motor produces up to 20hp of on-demand power. In addition, BMW’s now familiar Brake Energy Regeneration is used to efficiently capture energy that would previously have been lost when the engine is on overrun. Innovatively, the alternator is also integrated into the crankcase rather than conventionally driven from the front of the engine.

BMW’s concept uses highly efficient lithium-ion batteries in the boot area to store the power generated. These high-storage-capacity batteries enable optimum use of Brake Energy Regeneration. In addition, they create possibilities to power the air conditioning, electric coolant pump and the electric power steering system. For these functions, a 120 volt vehicle power system was designed and runs in parallel with the conventional 12 volt system.

The power harnessed by the batteries is also supplemented by roof mounted photovoltaic solar panels, measuring 1.0 metre square. The energy generated can either be used immediately or stored for later use. Importantly, the power created in this zero- CO2 way can be used to pre-heat the diesel fuel. The less efficient warm-up phase is thus shortened considerably.

This innovative and technologically advanced engine is directly mated to a new eight- speed automatic transmission. Developed jointly between BMW and ZF, the new gearbox delivers fast and efficient gear changes. With such a spread of gears, the car will always be in exactly the right ratio for the prevailing driving conditions. It also improves fuel consumption and minimises emissions.

The chassis and ride-height of the X5 have been adapted for the BMW Vision EfficientDynamics. This includes aerodynamically-efficient 19-inch light alloy wheels with reduced ventilation. The design of the spokes reduces wind resistance to the extent that, at 100mph, the car has to produce one horsepower less than a conventionally-wheeled car. This benefit has not been included in the fuel consumption calculations but, on the road, the impact is noticeable.

[Source: BMW vvia WCF]

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

An X5 usually cracks 5k pounds on the scale. you would think this application in a 3,800 pd car would yield 42mpg + and 0-60 in less than 8 sec.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Sunny said:

Yup, I always wondered why there were no diesel hybrids - would be the best combination for an economical engine. But I wonder why put it in a X5 first, why not something lighter like 1er or even X3 - may be it will debut with X1. But what I really hope is this engine makes it to Mini. With that weight, would be fantastic performance and fuel economy.

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Because the large vehicles are where the most fuel saving is needed. In a small car like the 1er the technology is expensive and the reduction in consumption is relatively small.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

This innovative and technologically advanced engine is directly mated to a new eight- speed automatic transmission. Developed jointly between BMW and ZF, the new gearbox delivers fast and efficient gear changes. With such a spread of gears, the car will always be in exactly the right ratio for the prevailing driving conditions. It also improves fuel consumption and minimises emissions.

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This must be the new ZF 8 speeder expected for the new 7 Series.

This car has some amazing technology. BMW engineers are on fire at the moment.

400Nm of torque between 2,000 and 2,250rpm

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Plenty of low down power which is very handy for a big, heavy car like the X5. I wonder what the torque curve is like higher up in the power band?

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Nice move BMW, but a 4 cylinder to a 2100kg SAV? this one must weight something like 2300kg? poor 23d...

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

CorpusCallosum said:

This must be the new ZF 8 speeder expected for the new 7 Series.

This car has some amazing technology. BMW engineers are on fire at the moment.

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Exactly. F01 7er will the first production vehicle with that gearbox.

Regarding mild hybrid system: it's a system developed in cooperation with Mb (not to be mixed with two-mode full hybrid system feat. CVT - co-developed with DC & GM). And the most interesting characteristic of this system is its a modular solution - so BMW are able to install it in any BMW model with no significant re-engineering. Meaning: expect several mild-hybrid models within almost every series. While full hybrids will be more rare, and mostly seen in big high-end & SAV/SAC models (eg. X5, X6, X3, 7er, F5).

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva





What is it?

BMW X5 Vision

What's special about it?

Downsizing? Forget it!

This is BMW's message as it whips the wraps off its latest concept, the BMW X5 Vision Efficient Dynamics. This is a seven-passenger SUV that boasts the performance, fuel consumption and emissions rating of your average compact car.

The BMW X5 Vision is the latest in a growing number of vehicles produced under BMW's banner of Efficient Dynamics, and if comments from high-ranking corporate execs are to be believed, there is every chance the new concept will reach production in the next two to three years.

Featuring a combination of technology already found in selected BMW production models as well as developments the German carmaker is preparing for the future, the X5 Vision provides a look at how BMW sees the market for luxury SUVs evolving as ever-tighter emissions regulations compromise the appeal of such vehicles, especially in Europe. For example, the city of London has announced it will slap a surcharge on downtown visits by vehicles that exceed a standard of CO2 emissions.

At the heart of the new concept is a hybrid drivetrain that our source at BMW indicates will begin appearing in selected BMW models within the next three years, including the German carmaker's upcoming PAS (progressive activity sedan) and second-generation X3 — both due out next year.

Not to be confused with the full hybrid system revealed on the X6 ActiveHybrid at the 2007 Frankfurt Auto Show, the X5 Vision's new technology is a mild hybrid drivetrain. A small-displacement diesel is supplemented by an electric motor to make stop/start operation in traffic a practical enterprise.

Sitting up front underneath the reworked X5's expansive hood is BMW's new twin-turbocharged common-rail injection, 2.0-liter inline-4 diesel engine. Equipped with the latest Bosch piezo injectors, the diesel produces 204 horsepower along with an impressive 295 pound-feet of torque at 2,000 rpm. The small electric motor provides 20 hp and 155 pound-feet of torque and is powered by electricity stored in two separate lithium-ion batteries sited in the space usually reserved for the spare wheel underneath the floor of the cargo bay.

As in the usual mild hybrid, the X5 Vision's electric motor is only used to start the engine from a stop and provide a small amount of supplemental power. When stopped at a junction or when sitting idle in a traffic jam, the diesel engine automatically switches off to conserve fuel and reduce emissions. As soon as the driver releases the brake pedal and depresses the accelerator, the engine springs back to life. The existence of the lithium-ion battery pack means the operation of the air-conditioning and other systems reliant on electricity is maintained during short periods.

Drive is transferred via BMW's xDrive four-wheel-drive system to each wheel by a newly developed eight-speed automatic gearbox. Produced by German transmission specialist ZF, it is planned to replace the existing six-speed automatic across the BMW lineup from the end of 2008, starting with the fifth-generation 7 Series due out at the Paris auto show this coming September. For the X5 Vision, the new gearbox has been modified slightly to house the electric motor and its associated electronics package.

BMW claims the new package will achieve 36.2 mpg for its latest concept. This is dramatically better than the 29 mpg expected from an X5 with BMW's 225-hp 3.0-liter inline-6 diesel. The trade-off is in straight-line performance, although the difference is not as marked as one might expect, given that the emphasis here is very much on fuel-efficiency. While the X5 3.0d will crack 100 km/h (62 mph) in 8.3 seconds, the X5 Vision runs close, at 8.9 seconds to the same speed.

Other developments include the incorporation of a solar panel within the roof that acts as an additional electrical source. It enables pre-heating of the oil while providing a source of power for the air-conditioning, entertainment and other systems when the car is stationary.

The standard U.S.-built SUV's wheels have also been swapped for futuristic-looking alloys developed in BMW's wind tunnel. Their aerodynamic shape is claimed to play an important part in reducing fuel consumption by requiring one kilowatt less propulsion power at a speed of 100 mph. Further measures taken to reduce drag include a lower ride height, unique door mirrors, roof bars partly integrated into the body shell and an extended spoiler element over the split tailgate at the rear.

What's Edmunds' take?

Though the European car manufacturers have long disdained hybrid power, they've finally changed their tune. Suddenly affordable, GM-style mild hybrids seem like a practical solution, don't they?
— Andreas Stahl, Contributor

BMW X5 Vision - 2008 Geneva Auto Show


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Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

The engine bay looks amazing... Rims?

But this car ain't about the looks, but engineering...

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

Can someone enlighten me and tell me the diff between this and MB's diesotto system?

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

atuv said:

Can someone enlighten me and tell me the diff between this and MB's diesotto system?

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Diesotto is one engine that is a mix of Diesel and regular 4-stroke petrol technologies (i.e. it incorporates the best features of both types of engine)

Like any hydrid system (combustion engine + electric motor), this is a two engine system (main Diesel + small electric motor).

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

^ Notice how far back the engine sits. Amazing. This is definitely the type of S.U.V people should be driving; all the torque and power is there but with the added bonus of small-car fuel efficiency. Only rub is that this is going to be pricey.

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

siko said:

Diesotto is one engine that is a mix of Diesel and regular 4-stroke petrol technologies (i.e. it incorporates the best features of both types of engine)

Like any hydrid system (combustion engine + electric motor), this is a two engine system (main Diesel + small electric motor).

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Thanx Siko

Re: BMW X5 Twin Turbo Diesel Hybrid Concept @ Geneva

0-100 in 8.9 secs thats fantastic for an SAV with a 2.0 liter hybrid diesel.
Put that same engine in a 1 or 3 series and it'll do wonders beyond any doubt.

I'm sure BMW are busy trying to eliminate that horrible sound that diesel engines make hehehe....