Nissan introduces engine with 50% thermal efficiency

Gokhan

Gokhan

Joined
Dec 29, 2010
Messages
5,889
Location
Paramount, California
This is great! I need to watch the whole YouTube video when I get a chance. I love the way the Japanese nod when they are introduced. It's funny though they are dubbed with female voiceovers. 50% thermal efficiency is great, and they have certainly put a lot of effort into this, and it is exciting. The current Prius engine is at 41%, and I think the Camry Hybrid engine is at 42% thermal efficiency. Hyundai's TGDI hybrid engine is also about the same. The next-generation Prius engine could see 45%.

https://www.cnet.com/roadshow/news/nissan-e-power-gasoline-engine-50-percent-thermally-efficient/

 
Makes sense. Tune it for one set RPM and load and you can do all sorts of crazy things you can't do with something driving the wheels. And that would probably be without all kinds of what we would consider 'normal' these days. (Adjustable cam timing, lift, etc.)

Maybe it will make more of a mark than their variable compression engine did. By all accounts, it is a neat technology, that doesn't really deliver.
 
This website is too predictable and we all know the Nissans are junk comments will follow. Like it or not, it opens up the door for others to follow and potentially improve upon. I stated a few years ago there are engines in skunk works the auto makers are working on. There might be teething pains but it’s oftentimes part of evolution.
 
Fixed RPM generator engine.... and only 50%? Should consider running the exhaust to a boiler for a steam engine generator too
 
skyactiv said:
This website is too predictable and we all know the Nissans are junk comments will follow. Like it or not, it opens up the door for others to follow and potentially improve upon. I stated a few years ago there are engines in skunk works the auto makers are working on. There might be teething pains but it’s oftentimes part of evolution.
Click to expand...
You should ask yourself why there are so many Nissan is junk comments. It might open some doors into truth for you.
 
FowVay said:
That one "catch" is that it's attached to a Nissan product. After my 2017 Frontier purchase I won't set foot on a Nissan dealer's lot.
Click to expand...
Only Nissans me and the boys touch are 370zs or the GTRs. Everything else is a no go until they get their act together. Sad. They use to be good at one point.
 
I for one don't get the Nissan bashing. I have had unreliable Honda, expensive to maintain VW, Dodge that leaked, Fords that were problematic & Rusty Mazda. I think because Nissan makes some entry level product that might get a disproportionate amount of owners that prefer to get a new iPhone versus spending car maintenance money...their poor Nissan somehow became unreliable?

I Got into Nissan with the looks & impressive power of my old 2013 Maxima and haven't looked back since, Now we have a '17 Rogue and my '19 Infinity QX60 and both have been good and solid.

All brands can make a dud. If you maintain per owners manual, wash and wax, clean out the salt underneath, the average car will give you good service.
 
What was the thermal efficiency that Smokey Yunik achieved with the GM 3 cylinder years ago? I know it was the main driver of his modifications/design, but never heard the outcome.
 
That really IS impressive work, I like some of Nissan's products and if you go back to the 1990s and earlier Nissan was right up there with Toyota, and Honda as an equal for design and quality.
 
I think this is a great idea to add an engine like this to an electric vehicle to extend range, or enable "off grid" operation for when charging isn't practical or possible.
I'm surprised Honda/Mercedes/Renault hasn't come out with this as F1 engines currently get around 50% thermal efficiency with a 6-8k rpm usable range, at varying loads, so I'd think they'd be able to do better for a single rpm and load engine.
 
Gokhan said:
50% thermal efficiency is great
Click to expand...
It's a lie, marketing. That's not thermal efficiency, that e-Power is a thermal motor driving a generator.
...allowed Nissan to hit 46% thermal efficiency in its testing. It made up the last 4% by using "waste heat recovery technologies," though it's unclear what those are exactly. We reached out for clarification, but didn't hear back in time for publication.
Click to expand...
No real life thermal cycle can be more efficient than Carnot theoretical cycle.
https://en.wikipedia.org/wiki/Carnot_cycle
 
SoNic67 said:
No real life thermal cycle can be more efficient than Carnot theoretical cycle.
https://en.wikipedia.org/wiki/Carnot_cycle
Click to expand...

Considering very large motors are near 60%

765FA357-4852-4C9D-B789-043377C1AF26.webp


Meh to you,

Nissan has found a way to build a very cheap, very efficient, single speed motor and indeed that is the only way you can partially overcome the extreme inefficiency of a series drivetrain


Too bad e-power will never touch North American shores, anyone willing to import for a drivetrain swap?

(There are cheaper ones straight from Japan)

http://www.j-spec.com.au/featured/2017-Nissan-Note-e-Power_X-18093.html
 
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