Variable compression engine. The future is here!

you say these things like HCCI does not accomplish that and more

>Because this thing will pass future nazi emissions
How? How does 14:1 beat Mazda's 15:1 lean burn? Did you know that the Mazda has effective compression ratio control via altering the combustion pressure as part of the ignition?
>have great mpg and deliver good power when you want it
Still doing that, but now with less rotating mass.

>longer lasting
>Renault parts
mutually exclusive

>2018
>still innovating on an outdated technology

ICEs are the past. The future is electric.

This crankshaft setup allows instant changes in compression ratio by changing the physical properties of the stroke. Idk if hcci can do that

HCCI can't switch compression ratios instantly like this engine can

until more efficient electricity storage has been developed you can keep dreaming
if that doesn't happen soon enough cars will start being electrics with small generators on board
and suddenly all these developments in ICEs will become very useful again

Not an argument. All modern engines are unreliable, high strung turds

What the fuck is your definition of unreliable?

200mile battery (for a Tesla) is $12k

200mile is more than enough range for most of th world (honestly US and Australia are the exceptions).

The only reason they have not make an entry level EV yet is because they are trying to load them up with bullshit and sell them to hipters.

If they got one of those barebones Yuro hatchbacks and put an EV drive train, they could get it down to $25k or cheaper and it would absolutely dominate the EU market consider gas prices there. Won't be long till is spreads elsewhere too.

what the fuck are you on about, cars in general are reliable as shit
not to mention, see Lexus/Toyota/any other car known for being more reliable than the rest

For one, why would it matter? The engine is not a turbo engine, so it wouldn't benefit from lower CR. At the same time, its standard CR (15:1) is higher than even the Renault engine. For another, the ratio is adjustable up to 18:1, from what I can tell. Because it's not true HCCI, but spark assisted, the addition of a compressing wave front before TDC adjusts the effective compression ratio. They inject some fuel on the compression stroke into a small area around the spark plug, which then is ignited to create a high pressure wave between the top of the cylinder and the piston, to sandwich the lean air fuel mixture (advertised to reach numbers as crazy as 36:1).

Someone has seen the latest engineered explained video

and it will break every 30k miles just like their garbage cvts

>dorito
>3 moving parts
>one of the most unreliable engine ever made

dude just go for his channel

>ICEs with 95% efficiency in this lifetime
>electric meme dies out

>not a fusion reactor
dropped

No engine is unreliable, only people makes the so by neglecting them.
Either you run 50k miles on one oil change and the complain that your engine is smashed potatos, or you bought once a car from someone that did it.

Any development on ICE makes me very happy. So now I love infinity.
Fuck electric

For what reason would you make this when the same effect could be achieved with VVT?

Since you're smarter that all those engineers explain to us how

Vvt just allows a higher rpm range and the best timing throughout the rpm range. Compression ratios are different

>is on Veeky Forums
>has failed middleschool thermodynamics

It's a boring subject but fucking ICE is all about thermodynamics. I'm disappointed in you, son.

...

Yeah cunt you need a V8 for straya

not really

lithium batteries are expensive and so is the rest of the EV drivetrain

there's no way with current tech to make a 25k ev shitbox that meets all the euro safety regs

I love seeing amerisharts complaining about electric cars having "muh autonomy" and then fiery justify that the Lincoln Navigator with its whopping 12MPG and 200 miles ranges is ok because they aren't yuropoors anyway.

They are joke people

The variable compression engine isn't interesting for its ability to change compression. Its interesting because it reduces friction with the cylinder wall by having a more direct link to the crank. Reducing friction there will increase the thermal efficiency and extrapolate more power with each stroke.
As for the compression ratio itself, for their efficient mode they're hitting 14:1, same as Mazda with current Skyactiv engines. That isn't anything new. Going to 8:1 to make more power on the fly is kind of neat, but not really that important over all.

not the guy you responded to, but maybe by leaving the intake open part way into the compression stroke to reduce the volume of air in the cylinder , then using direct injection to add the fuel after the valves have closed? It would be closer to variable displacement if anything, but since increasing displacement increases compression ratio (with the same size combustion chamber) it would have a similar effect. the engines "static" compression ratio would have to be quite high though, and valve float could lead to a piston hitting the valves. you could also close the intake earlier to achieve the same effect, but it would cause the engine to work against vacuum when the valve is closed part way into the cycle, wasting energy

>For one, why would it matter?

brainlet

I need to see an animation of this

90% of americans drive foreign cars

The eternal advantage of ICEs is the ubiquity of fuel and the ability to transport additional fuel with a fucking plastic jug.

Out of gas? Pour some more gas in. You can replenish your auxillary gas supply in about 30 seconds at the next gas station. EV ran out of charge? Alright guys, this will only take 45 minutes. Maybe, one day, we'll have 500lb emergency batteries!

>200 mile range navigator
>if i run out of gas i can stop at any gas station and fill up 5 mins

>200 mile ev
>if it dies i have to wait hours for it to recharge

yeah dude same thing

fucking retarded europoors

but europoors never drive 200 miles and are always within 10 minutes of an outlet

most europoors...some actually drive across the continent for business and sightseeing, in which case they don't have time to stop and charge their electric car and will stick with their diesel golf.

>hp
Do plebs even care about this anymore

they do but its called passingpower instead of horsepower

if you think this sounds dumb, it's because normies pass multiple cars at a time on arrow straight two lanes.

People just want pull above 60-70mph.
It doesn't take a lot of power to do that, just gearing.

>he ACTUALLY believes rotaries are unreliable

You've outed yourself as a normie

You still need the power to overcome drag

Gears are not magic. Give me a very long lever and I still won't be able to lift a house by hand.

lol depends on how long the lever is

In practical reality it reaches a point where the lever is so long that traditional materials are no longer sufficient or the lever itself requires extra force to move because reinforcement has made it so heavy.

In the case of cars, you can only fit so big of a gear in there. There's a reason why we add power instead of another gear ratio.

If you run it like a piston engine, maybe.

looks like it will break after 10k km for next to no gain.

Rotards git out

I've seen patents involving getting water out of exhaust gas to use it for water injection in tarbo engines. Frankly that sounds more reliable than this renault variable compression. Atleast a water tank can be hand-filled with distilled water if whatever retrieves the water from exhaust gas fails
>french
>french in charge of electronics
You gotta be shitting me bruh

The effect can not be archived with VVT.
The point of variable compression is to run a 8:1 compression ratio at high boost to make power and a 14:1 without boost in atkinson cycle to get MPG.

IdgaFUCK about whatever yall nerds are talking about. What does this do for performance? Can this make muh V8 twice as efficient at low compression and still have the torque at high comp?

Nigga dis sheet works with a turbo for better MPGees

>Dorito
>Entirely different design from bouncy piston box
>Treats it like bouncy piston box
>Kills dorito
>Muh unreliability

Let me just treat a piston engine like a rotary and see how unreliable it becomes. Half of them will eat themselves before even breaking 8,000 rpm, which is just daily maintenance for a rotary. I'll cruise at 3000-4000 rpm too, that'll put some real wear on the excessive number of bearings.

You mean there's nothing coming out of the exhaust but pure CO2?

O M G ECONAZI

There's nothing wrong with Renault desu

t. le batong

>All modern engines are unreliable

LOL top kek. The only unreliable engine in this era run average 250°F or/and have a plastic radiator.

Another one of those AMAZING inventions that end up changing nothing.

>implying Renault isn't one of the best engine builders

honhonhonhon

you are so fucking stupid
which one of these is more reliable?

>compression ratio between 14:1 and 8:1.
there are other ways to do that

Holy shit saved.
>How 'come when I rev my i4 to 10k it explodes! It's unreliable!

>no trigger guard
Stop posting Cletus's shitty pistols

Considering it's a 1911, probably the viet cong

>2 strokes and rotaries
>More reliable than a straight six diesel

Yes remind me about how ships and trucks have single cylinder NA 2 strokes with carburetors

I have an old 1950s engine. It is far from being more reliable and needs oil changes almost all the time

>Run it "like a rotary" at only 6k or more rpms
>Run out of money from buying fuel and 2 stroke oil all the time rather than run out of money from buying apex seals and doing rebuilds

Assuming they're machined to the same level of precision, the one with less moving parts.

What are you on about bruh? My i4 does 10k all day every day :^)

We've been doing variable compression engines for years OP, it's called "Forced Induction."
>off boost 8:1
>on boost 13.5:1

wow it's fucking nothing

You don't understand what power is.

Off boost absolutely nothing happens in a small French engine, with this newfangled design it may be capable of keeping the car moving without tarbo boost

t. renault/nissan fangirl

You could move the house but by a few micrometers

>doesn’t know what compression ratio is
Look at this fucking retard

isn't >50% literally impossible

Where's the proof?

Have fun trying to make enough compression without also burning off a large chunk of your fuel's potential energy as heat.

Mercedes F1 Engines have reached more than 50% efficiency.

fuck off john

The question is what's going to be more reliable in the open market: Renault's extra spinny bits, or Mazda's sensor dependent miracle motor.

Safe to say it'll find its way into certified light aircraft in about a trillion years. Cessna etc are still eyeballing those newfangled inventions like mechanical timing advance with great suspicion

Mazda's will definitely be more forgiving for retards who don't change their oil often enough.

In that Thermodynamics class you didn't take. 50% is the limit for current production materials. Anything beyond that and you're doing crazy shit with more exotic materials. You could theoretically do close to 70% with current ceramics tech, but engine life would be measured in minutes. The highest efficiency production vehicle ICE are some of the GDI engines, which push 35%.

Mazda's.
It's cheaper to implement and has more solid-state parts that don't need more lubrication and don't wear.

Mercedes does it in F1 with those ultra low tolerances, plasma spray igniters, etc.
Now imagine using the S500 hybrid system (derived from the F1 cars), cruise HCCI from mazda, open source freevalve, water injection from water in exhaust gasses, perhaps other tech like the prius' exhaust gas used to heat engine oil during warmup, perhaps use of multiple fuels and 50%+ becomes achievable for the 2030 shitbox. Even volvo trucks is starting to produce truccs that run on both diesel and cng, using 100% diesel during heavy loads and up to 80% cng + 20% diesel during cruising for favorable fuel consumption

For gasoline engines 40% efficiency would extremely high, reaching higher than that would be quite a feat.
The issue is that heat is being wasted, and you're never going to make it burn cold. We could try to recapture that heat energy and use it for something, maybe store it as electricity, but there'd still be high losses involved. I'm not sure that hitting over 50% would actually be impossible, it'd just be a matter of meaningfully harvesting that wasted heat.

Some industrial scale turbines can reach efficiency in this range, diesel and natural gas generator turbines reach a bit higher. Though these are totally different beasts from car engines.

>The highest efficiency production vehicle ICE are some of the GDI engines, which push 35%.
you're fucking retarded. you can literally get 4500hp diesel from MTU or wartsila which has >45% efficiency

some gas turbine from GE has supposedly hit 60% efficiency

>calling me retarded for stating the exact same thing I just said

Hows the autism, pal?

>diesel golf.
I have some terrible news for those