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Volvo XC Coupe Concept
Volvo's next generation XC90 T8 will produce 400hp and 472 lb-ft of torque

Volvo isn’t leaving anything on the table when it comes to its next generation XC90 crossover. The first generation XC90 was launched in the United States way back in 2002 and has soldiered on as largely the same vehicle (with some minor updates thrown in for good measure) ever since.
 
Given that the current XC90 is so old (albeit with an exemplary safety record), Volvo is looking to make a big bang with the second generation model. The 2015 XC90 will be available with a number of gasoline and turbodiesel engine options, but the most impressive model will feature a complex array of tech to boost power and fuel efficiency.
 
If you were expecting the top-of-the-line engine to sport eight-cylinders or at least six cylinders, you’ll be greatly disappointed. The all-new “Twin Engine,” which will be badged as T8, is a 2.0-liter four-cylinder that is both supercharged and turbocharged. This engine powers the front wheels, while an 80hp (60 kw) electric motor is strapped to the rear axle.


Volvo XC90 T8 chassis
 
When combined, the powertrain in the plug-in hybrid generates 400hp and 472 lb-ft of torque compared to 311 hp and 325 lb-ft of torque for the discontinued V8 engine that was optional in the XC90 from 2005 through 2010. Thanks to the generous capacity of its onboard battery, the XC90 T8 can travel up to 25 miles on battery power alone.
 
The lesser XC90 T6 will feature a 2.0-liter turbocharged engine generating 316hp and 295 lb-ft of torque.


Volvo XC Coupe Concept
 
When it comes to exterior styling, we have to look to the Concept XC Coupe, which made its debut at the Detroit Auto Show. Just add two more doors for the rear passengers and you have a general idea of what the production vehicle will look like.


 2015 Volvo XC90 interior
 
As for its interior, Volvo has already shown us a fully-dressed production interior complete with a massive, central touch display which Volvo says “forms the heart of an all-new in-car control system.”

The all-new XC90 is set to begin production in the fourth quarter.

Sources: Volvo Cars [1], [2]



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Impressive specs...
By vortmax2 on 7/8/2014 11:33:29 AM , Rating: 3
The concept looks great so if they can keep the production model looking similar, it'll be a win-win imho.




RE: Impressive specs...
By Brandon Hill (blog) on 7/8/2014 11:37:58 AM , Rating: 3
While that concept looks great, I hope they put this one into production:

http://www.volvocars.com/intl/all-cars/concept-car...


RE: Impressive specs...
By vortmax2 on 7/8/2014 12:29:16 PM , Rating: 2
That's really nice. Some of these vehicles are now starting to resemble 'futuristic' ones seen in sci-fi movies...cool stuff.


RE: Impressive specs...
By bah12 on 7/8/2014 1:00:38 PM , Rating: 2
Agreed. Although I'm left scratching my head a bit on the turbo+supercharger. Seems like complication for complication sake. The only reason to do both would be lag I suppose, but given the electric motor, lag wouldn't be much of an issue anyway. Seems like it would be much less cumbersome to just spin up one option to higher boost levels, rather than add both. Very odd.


RE: Impressive specs...
By amanojaku on 7/8/2014 1:17:14 PM , Rating: 2
Probably because the electric engine only supplies 80HP compared to the ICE's 320, and it only drives one axle. It can't compensate for the ICE's low-RPM performance at low speeds; only the supercharger can. The electric engine probably works wonders at highway cruising speeds, though.


RE: Impressive specs...
By M'n'M on 7/8/2014 3:49:30 PM , Rating: 3
quote:
The only reason to do both would be lag I suppose

Your intuition is correct. From ...
http://www.greencarreports.com/news/1093157_volvo-...

"Volvo also announced at the engine's launch that a turbocharged and supercharged variant would be produced--and that's the engine used in the 'Twin Engine' Volvo XC90.

The supercharger is used to boost power at the bottom end of the rev range, where a traditional turbocharged setup takes time to build up boost. A turbocharger then kicks in to increase mid-range and top-end power.

But in the T8-badged XC90, a 60 kW (80 horsepower) electric motor is also present. Driving the rear wheels, it can supply the sort of immediate surge of power electric vehicle drivers are already well used to.

The T8 'Twin Engine' setup is good for a total output of 400 horsepower, and 472 pounds-feet of torque--yet produces CO2 emissions of just 60 grams per kilometer.
"

I wonder if the SC is clutched (or on a CVT pulley), so that when turbo boost is available it can be removed from the system to reduce it's load ?


RE: Impressive specs...
By Samus on 7/8/2014 4:06:06 PM , Rating: 2
I'd expect a LOT of lag on the 2.0 Turbo if it really delivers over 300WHP. Even with antilag, smart wastegate, direct injection and trick cams/timing, I don't see how they're going to pull off a smooth powerband. I4's just don't produce enough low-end torque to start a big turbo (like the one that will be required to produce an additional 100+HP)

I'm an engineer, but not a Volvo engineer. If I were going to roll out a vehicle like this, I'd repackage their concept. The 2.0L Turbo should have the electric motor on the rear wheels to help with low-end, low speed acceleration, and the Dual-boost engine wouldn't need any assistance from electric motors since the supercharger essentially negates the turbo downside by producing torque at the low end.

But I suspect they're desperately adding an electric powertrain to the Dual-boost model simply to improve fuel economy. Dual-boost engine applications are gas guzzlers. Hell, superchargers alone are gas guzzlers. They require a 30% drag on the engine just to give back 70% more power. So in realist a "100HP" supercharger only gives you around 50HP. This applies to all applications, wether they be roots style or screw type. Centrifugal is the most efficient and what I suspect they are going with.


RE: Impressive specs...
By chmilz on 7/8/2014 10:50:05 PM , Rating: 2
What ever happened to electric turbochargers that used a motor to remove the lag? Wouldn't that make a lot more sense than throwing a supercharger on the pile?


RE: Impressive specs...
By M'n'M on 7/9/2014 12:22:37 AM , Rating: 2
Do you mean electric superchargers or electrically assisted turbos ? The former require some non-trivial HP to run and each HP equates to about 746 watts of electrical power. At 15v that means 1 HP requires about 50 amps from ... somewhere. That's a non-trivial amount of current and correspondingly fatter wire gauge and alternator and/or battery output. That's both $$ and heavy, which goes against the goal of fuel savings.

As for assisted TCs, you've now got the challenge of working at 100k+ RPM and high temps. That isn't going to happen at low $$s.

So you're fighting that triad posted on every engineer's wall ... You can have it faster ... or cheaper ... or well done.

Choose any 2.


RE: Impressive specs...
By FITCamaro on 7/9/2014 7:51:41 AM , Rating: 2
HAHAHAHAHAHAHA!!!!

Please tell me you're not referring to that $30 crap on ebay that claimed actual horsepower and torque gains when in reality it was more likely to turn into scrap metal and plastic in your engine when it fell apart.


RE: Impressive specs...
By BZDTemp on 7/9/2014 6:28:59 PM , Rating: 2
He could be referring to how the 2014 F1 cars power unit work, they do a lot of clever stuff including at times using electric power to run the turbo.

Of course with the F1 cars cost is virtually a irrelevant consideration and while fuel efficiency is required to be much better than just last year then power is still very high on the list of priorities.


RE: Impressive specs...
By FITCamaro on 7/9/2014 7:50:09 AM , Rating: 2
GM has been getting 260-290hp out of a 2.0L for years. With little lag.


RE: Impressive specs...
By Samus on 7/10/2014 12:42:32 AM , Rating: 2
Impressive. If only they could make their ignition cylinders and door latches as equally advanced...

I drove the Focus ST, a 2.0l I4 rated at 263HP (FWHP, NOT BHP) and it felt quite laggy with the AC on. To the point it was relatively easy to stall with such a heavy clutch.

If GM is getting even more power, even with a twin scroll turbo, I doubt even with an automatic and no AC it'll be a competitive with a NA 2.0L I4 off the line up to about 30MPH.

The whole powerband argument always brings me back to college when my Ford Taurus was always faster off the line than any Honda Civic or Mazda Miata. Same HP, but 3.8L vs 1.8L.

There's no replacement for displacement. We have the technology to get over 30 MPG from simple 4.0L+ engines (even the Mustang with 300HP from an N/A 3.7L get's 30MPG.)

So you shouldn't have to sacrifice cost, complexity and torque for no reason. The only place a turbo belongs is on a diesel or high performance sports car, for opposite reasons.


RE: Impressive specs...
By Reclaimer77 on 7/10/2014 2:21:16 PM , Rating: 2
quote:
I drove the Focus ST, a 2.0l I4 rated at 263HP (FWHP, NOT BHP) and it felt quite laggy with the AC on. To the point it was relatively easy to stall with such a heavy clutch.


Are you sure you know how to drive a stick?


RE: Impressive specs...
By Reclaimer77 on 7/9/2014 4:34:19 PM , Rating: 2
Why do people still talk about turbocharger lag like it's still the 1990's?

That's been solved years ago...

quote:
I4's just don't produce enough low-end torque to start a big turbo (like the one that will be required to produce an additional 100+HP)


That's why there's twin scroll turbos, variable vane turbos, or any combination of either.

The only limit is budget. And since this Mercedes is probably a small fortune anyway....

I agree that this entire setup is absurdly over-engineered though. Turbo's, supercharger, AND electric motors? I mean come on, that's ridiculous.


RE: Impressive specs...
By Reclaimer77 on 7/9/2014 4:35:51 PM , Rating: 2
Argh edit, not Mercedes, but Volvo.

Is it just me or does that look like a Mercedes tho?


RE: Impressive specs...
By BZDTemp on 7/9/2014 6:38:12 PM , Rating: 2
VW have been using such a solution for a few years now. At first I was thinking the same as you, but there seem to be no reports of issues so things should be okay.

Neither ways of force feeding an engine are exactly new tech, so while a combination brings more moving parts it is not that scary when you think about it.


RE: Impressive specs...
By Jeffk464 on 7/8/2014 4:27:47 PM , Rating: 2
quote:
The concept looks great


Yup, I like it a lot. I'm always looking for a vehicle that can haul bikes and RC planes that doesn't look to nerdy. Not sure I trust volvo's reliability but I like it a lot.


RE: Impressive specs...
By Jeffk464 on 7/8/2014 4:31:35 PM , Rating: 2
Drop a Toyota power plant in one and I would be running to the dealership.


RE: Impressive specs...
By Samus on 7/8/2014 10:49:53 PM , Rating: 3
LOL. You mean a reliable, low maintenance Volvo. That'd be voodoo. My friend's C30 was so incredibly unreliable, I was scratching my head at how Volvo made what is essentially a Focus such a lemon. A beautiful lemon, though!


RE: Impressive specs...
By Jeffk464 on 7/9/2014 12:37:53 AM , Rating: 2
yeah, thats my fear


RE: Impressive specs...
By Jeffk464 on 7/9/2014 12:38:19 AM , Rating: 2
no doubt they cost more to fix to.


RE: Impressive specs...
By Reclaimer77 on 7/9/2014 4:42:28 PM , Rating: 2
quote:
I'm always looking for a vehicle that can haul bikes and RC planes that doesn't look to nerdy.


Then I guess the Model X isn't for you, since Tesla made the roof unusable in order to put silly impracticable doors on it.

I know not EVERY crossover owner uses the roof, but that should always be at least an option.

quote:
Not sure I trust volvo's reliability but I like it a lot.


I don't know if I would trust anyone to impliment this wonky of a drivetrain. A turbo and a supercharger AND an electric powertrain all in one vehicle? LOL No, just...no thank you. No way! They've just increased the chances of something going wrong exponentially.


Not bad...
By SublimeSimplicity on 7/8/2014 1:41:03 PM , Rating: 2
The supercharger/turbocharger system seems half-assed to me in a vehicle that has a high voltage battery in it. At the very least replace both with an electrically driven turbo (faster spool and smoother power delivery).

Ultimately, they should ditch all the forced induction and beef up the electric drivetrain. If they could hit 40 miles EV of range, and gotten 120-150hp out of the electric motor the overall product would be better and simpler. The extra battery capacity would be a couple grand, with some of that offset by the simpler ICE.




RE: Not bad...
By Jeffk464 on 7/8/2014 4:35:19 PM , Rating: 2
Yeah, more like the BMW i8 power concept. Sounds good to me.


RE: Not bad...
By Spuke on 7/8/2014 10:06:17 PM , Rating: 2
quote:
Ultimately, they should ditch all the forced induction and beef up the electric drivetrain. If they could hit 40 miles EV of range, and gotten 120-150hp out of the electric motor the overall product would be better and simpler.
Then you wouldn't have 400hp which is the point of the higher end XC90. Remember they're replacing a V8. I don't know how much weight the supercharger adds but it seems a larger battery pack would be a better choice. But maybe they thought of that (duh) and decided a larger battery that gets them to their power target would add too much weight than a supercharger.


RE: Not bad...
By Reclaimer77 on 7/9/2014 4:46:51 PM , Rating: 2
Why replace the V8 at all though?

Oh right..nvm


RE: Not bad...
By Spuke on 7/14/2014 3:15:15 PM , Rating: 2
quote:
Why replace the V8 at all though?
IMO, I would've done a small displacement DI (maybe 2.5L), single turbo V6 with a larger battery pack. Put a little larger turbo on it to hit the hp target and use the battery to make up for the hit in boost response down low.


Bigger on the inside than on the outside?
By HoosierEngineer5 on 7/8/2014 1:40:10 PM , Rating: 2
I doubt you will have a 6/7 seat interior in a 2-door.




RE: Bigger on the inside than on the outside?
By amanojaku on 7/8/2014 1:51:54 PM , Rating: 2
There are two cars, the Concept XC Coupe and the XC90. The Coupe is a two-door, four-seat concept car, while the XC90 production vehicle is a four-door, seven-seat crossover.


By Jeffk464 on 7/8/2014 9:36:53 PM , Rating: 2
Yeah, they should come like boeing makes different models of planes. Short coupe, medium length 5 seater, and then the extendo model 7 seater.


Propriety
By coburn_c on 7/9/2014 1:24:50 AM , Rating: 2
Now this is how electric motors should be used. The 2.0 super-turbo-high strung 4 banger is terrible tho. Think of all the things to go wrong in that engine, think of the cost when they do. Nice efficient V6 could manage the same power in the same space and you'd only lose a couple MPG, which the electric could make up for around town.




RE: Propriety
By FITCamaro on 7/9/2014 7:55:34 AM , Rating: 2
They could have gotten nearly the same power out of the 2.0L with just the turbo. GM manages nearly that power range just fine with the 2.0L Ecotec and a Stage 1 kit. Wouldn't take much to get more. Sure you might have a little lag but who cares.


How about
By FITCamaro on 7/9/2014 8:18:14 AM , Rating: 2
The option for just the ICE drivetrain with none of the hybrid crap.




RE: How about
By Nutzo on 7/9/2014 11:24:41 AM , Rating: 2
quote:
The option for just the ICE drivetrain with none of the hybrid crap.


I really hate that my Hybrid has more HP and gets double the mileage around town than the ice only model of my car gets. Especially since my driving is 95% city.

I also dislike that my brake pads will last over 150K miles, and that I'll never have to take it in to be smog checked (How do you smog check a car when the ICE shuts off at idle/low speeds).


By Mint on 7/8/2014 12:13:17 PM , Rating: 2
This is where PHEV tech will shine the brightest, and also add the least cost premium (since pure gasoline cars need a lot of parts to achieve the same goals). An independent rear electric motor gives you superior torque vectoring, too.

China's BYD is committing to the same philosophy (I guess Volvo is also Chinese now), as is Tesla with the Model X and future AWD Model S. Audi and the rest of VW Group will soon follow.




Hope US gets a diesel
By Lord 666 on 7/8/2014 8:32:01 PM , Rating: 2
Puerto Rico got a diesel in the current gen, but not for the continental US.




By Dr K on 7/10/2014 11:52:47 AM , Rating: 2
Just looking at the car, both inside and out, and looking at the HP and torque specs, I'm impressed. When I look at the view of the frame with the ICE on the front, batteries in the middle and eletric engine on the back... my engineering sensibilities kick in, and I think, "that's insanely complicated." It's what I despise about all of the hybrid cars, but that picture really drives the point home (so to speak.)




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