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Infiniti will turn to turbocharged 4- and 6-cylinder engines, hybrids, full electrics

"And another one gone, and another one gone / Another one bites the dust"
 
Well, it looks as though the recently approved CAFE standards that aim to increase automobile fuel economy to 54.5mpg by 2025 have claimed another victim. Infiniti currently has V8 engine options available in its M luxury sedan, FX crossover, and QX sport utility vehicles, but that likely won't be the case in future iterations of those vehicles.
 
According to a report by AutoGuide, increasingly stringent fuel economy and emissions regulations mean that V8 engines are no longer on the table for Infiniti vehicles. V8 engines have traditionally been available in luxury vehicles as a symbol of prestige and power, but Infiniti will look to new ways to bring powerful engines to its lineup while still keeping fuel economy in check.
 
“I don’t think any car that is on Infiniti drawing boards from here onwards we should expect a V8 to be included in that plan,” Johan de Nysschen, Infiniti's global president.
 
Infiniti's 5.0-liter V8 produces 385hp, its 5.5-liter V8 produces 420hp, and its 5.6-liter V8 (truck-based) produces 400hp.


Infiniti to say good-bye to V8 engines
 
There are numerous directions that Infiniti can take with the absence of a V8 engine. Automakers like Ford already have twin-turbocharged V6 engines that develop 365hp while still delivering respectable fuel economy. Even Hyundai is rumored to be getting in on the action with a twin-turbocharged 3.3-liter V6 which generates 395hp.
 
For entry-level and mid-range models will also see a shift in available engines as well. Infiniti's current workhorse engine is the 3.7-liter “VQ” V6, but Nissan is also working on a turbocharged four-cylinder engine to deliver comparable power and vastly improved fuel economy.
 
Other options for Infiniti include fully electric vehicles (like the LE Concept) and additional hybrid models (we’re hoping that Infiniti delivers a production version of the Emerg-E).
 
Infiniti isn't the only luxury maker to drop a V8 engine from its lineup. When Lexus redesigned its mid-range GS sedan, it dropped the 4.6-liter V8 engine option and instead launched the vehicle with a 3.5-liter V6 and a 3.5-liter V6/performance hybrid model for those that want the power of a V8.

Source: AutoGuide



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By FITCamaro on 9/3/2012 11:46:20 PM , Rating: 1
A 2.0L inline 6 would be pointless. Its too small an engine for that many cylinders.


By morgan12x on 9/3/2012 11:57:35 PM , Rating: 3
Agreed. Having a larger number of cylinders with a smaller displacement just takes the efficiency in the wrong direction due to internal friction and such. Either you would need more revs (short stroke/small bore) or more torque (long stroke/small bore) but both result in crappy power bands. On the other hand, large displacement 4 cylinders can be efficient but I agree they aren't very smooth.


By Philippine Mango on 9/4/2012 12:10:25 AM , Rating: 3
But that is the case with any engine of a smaller displacement, regardless of the number of cylinders.


By BZDTemp on 9/4/2012 4:03:33 AM , Rating: 1
More cylinders = more moving parts = more friction


By alpha754293 on 9/4/2012 3:43:04 PM , Rating: 2
You'd be amazed in some of the advances of lubrication systems; especially when it comes to synthetic lubrications.

There ARE "liquid engineers" (typically ChemEng or material science grads with either a master's or a Ph.D.) where pretty much all they do is manipulate materials and refinement/production processes in order to get the desired qualities/properties.

Think of the development of Mobil1 and then multiply that by like...a thousand!

If they can prepreg a soldier armor with a CWA detector; I'm pretty sure that they do wonders for friction - especially once the engine gets upto temp. (Low temp is still a pain.)

You also have to remember that the other advances in the engine where it's nearly variable EVERYTHING; any excess parasitic friction losses could probably be compensated for just by fine adjustments of the engine running/operating parameters, especially when onboard computers become more and more powerful, so rather than storing large lookup tables, it can actually do all the calculations and adjustments on the fly.

And the "smoothness" of an engine also has a fair bit to do with HOW you drive (since engine controls are mostly REactive rather than PROactive).


By fsd on 9/5/2012 1:12:02 AM , Rating: 2
They are typically called tribologists.
http://www.stle.org/

One thing to note is the smaller engines reduce part count and can reduce vehicle size. Take Mercedes C series, it is still big enough to fit a large V8 as in the AMG series, but interior space is less than a Honda Civic. Of course the Civic engine bay will not fit anything bigger than a typical 4 cylinder engine, definitely no V8.


By michael67 on 9/4/2012 5:32:43 AM , Rating: 2
quote:
On the other hand, large displacement 4 cylinders can be efficient but I agree they aren't very smooth.

I drive a GS450h and i can say its a lot smoother then a GS350, next to that its got 10% extra HP and is 20% more efficient.

You can even have a smooth and quick ride in 2 cylinder car, just make it a hybrid.

I have a R33 and a 6L V12 XJS, and love those cars, and would like to drive them all the time.

But reality is, those days are over, so i drive Think City EV or motor +95% of the time and save about +80% of my petrol cost.
Properly more more if i would drive the Jag all the time, as it only dose 10/18 mpg city/highway, even less if i drive real sporty!^_^


By Alexvrb on 9/4/2012 11:46:58 PM , Rating: 2
Think City EV? Sir, I'll be needing your man card, also turn in the keys to your real cars. You need a man card to drive them - it's the law. Since you're so worried about the cost of petrol, you probably won't even miss them.


By michael67 on 9/5/2012 4:20:10 AM , Rating: 1
You can have my "Man Card", i enjoy part of the money we save on the 2 months of holidays we take a year, like our 2 week dive vacation i just had to the Red sea.

Or that i will retire in 10y age 50, because i did not waste money on stupid things like petrol.

Don't have to prove the size of my dick with a big car, i am man enough on my own.

And with prizes here of $10 a gallon, people don't look down on you, if you driving a car like the Think City.

But if needed to drive the Jag to be a man, i would spend $8500, ware with the Think City EV and Honda CB500 i don't even spend 10% of that on my transportation!

Na... I rather be smart, then a dumb (cave)man!


By NellyFromMA on 9/4/2012 10:47:46 AM , Rating: 3
Inline 6 is also a space hog, isn't it? And hence, an engineering nuisance as well as a barrier for profitablity.


By Manch on 9/4/2012 12:09:18 PM , Rating: 2
Not so much big it is as is it is how tall it is. This can limit the applications in smaller cars. You will see them in more so in trucks, SUV's, though for a while BMW had one and they were quite profitable.


By Spuke on 9/4/2012 1:19:59 PM , Rating: 1
All BMW 6 cyl's are inline.


By Manch on 9/4/2012 2:16:34 PM , Rating: 2
Did not know that, only BMW I like is the M3 which is what I was referencing. One day Ill have one.


By RockyM20 on 9/4/2012 2:38:17 PM , Rating: 2
That's right. My 2001 320i has a 2.2L inline 6.

For its day, this engine was just amazing. Very smooth, puts out around 170 HP, and gets me 35+ MPG on the highway.

And as an added benefit this is one of the most easily maintained engines I have worked on. Changing sparkplugs takes maybe 20-30 minutes as everything is accessible on the top of the engine block (unlike the V8's in my trucks). Too bad that parts are so overpriced...


By ilkhan on 9/4/2012 2:52:02 PM , Rating: 2
I'm pretty sure this isn't true any more. It used to be that way.


By Spuke on 9/4/2012 5:58:30 PM , Rating: 2
quote:
I'm pretty sure this isn't true any more. It used to be that way.
Nope! Still is that way.


By Manch on 9/4/2012 7:08:42 PM , Rating: 2
They replaced it with a v8 and some of the 3 series have turbo 4's instead. M3 is going back to an inline 6 right?


By Jeffk464 on 9/4/2012 3:06:11 PM , Rating: 2
Actually V or boxer engines are more expensive to manufacture, inline engines are far simpler. The main difficulty with inline 6 cylinders is mounting them transversely for front wheel drive. In rear wheel drive vehicles like jeeps, beemers, the old cressida they are pretty kick ass.


By sorry dog on 9/4/2012 7:04:08 PM , Rating: 2
This IS the reason you don't see them more. It would be more of an engineering challenge to fit one in a transverse layout, hence more expensive...unless you shrink it, but then it's smaller displacement than the equivalent four banger. That was the point of the VW narrow angle V6 was to have the compromise the advantages of the inline with a package that could fit into a FWD platform like the Corrado or Passat.

Part of the problem with larger bores is it becomes more difficult to control the combustion and prevent pre-ignition, however with more and better sensors that issue is being improved as well as advances NVH (Noise, Vibration, and Harshness) that accompany the 4 banger imbalance.


By Dr. Kenneth Noisewater on 9/4/2012 2:45:47 PM , Rating: 2
BMW has a 1.6l inline 6, would _love_ to see that turbo'd..


By alpha754293 on 9/4/2012 3:34:25 PM , Rating: 2
Uh....that's NOT necessarily true. If you ever looked at a bsfc vs. torque vs. engine speed graph, most gas engines are actually most efficient near the middle of the engine speed range.

Saleen was actually working on a 3.2L V8 just before it effectively died when Billy Tally and Steve Saleen were forced out by the spoiled kids management grads.


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