Mazda 40:1 compression engines?

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Jmoney7269

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Watched an awesome video the other day on how Mazda is supposedly fixing to revolutionize the combustion engine technology. They are even going to use this technology in a new rotary engine also......
Essentially they run a super lean mixture that is so lean that it will not self ignite (detonate) and at the event of combustion the injector sprays a tiny amount right in the area of the spark plug only so that the immediate area near the spark plug has a normal stoich fuel mixture which then ignites the super compressed ultra lean mixture. They accomplish this with multiple injector timing events. Mazda is basically putting their skyactiv technology on steroids.....
Supposedly these engines will get upwards of 60mpg.....
I'll believe it when I see it, but it was cool!
 
Originally Posted by PimTac
It's already out. Available in Europe. Should be available in the US in 2021.


https://youtu.be/Jgsug4KkAqM

Good googly moogly........ that engine looks like nightmare to ever have to troubleshoot. I bet with all the wiring in place, that thing will look like a transformer and a bowl of spaghetti has a baby!
 
This reminds me of why I was sorry that Ford had to sell it's stake in Mazda.....their engineering dept. is awesome.
 
Very interesting... Thanks for posting.
thumbsup2.gif
 
This is simply another version of stratified charge. Been out for many years. Used on a rotary it amounts to lipstick on a pig. It will still be a gas hog. Rotary suffers from huge combustion surface area, short engine life and oil consumption. There are people that like them they are smooth, they have a certain feel.
 
I think this conversation is about the SkyActiv X engine. Mazda has pretty much limited the rotary future to being a battery extender Using a very small rotary with a generator.
 
Interesting. Will withhold judgement until I see some good data from real world use and some UOAs.

Oddly, their new SkyActive Diesel; lower compression at 14:1 to reduce ni-oxide issues. A diesel with 14:1? that's low!

They are certainly willing to push the envelope!
 
Originally Posted by ragtoplvr
This is simply another version of stratified charge. Been out for many years. Used on a rotary it amounts to lipstick on a pig. It will still be a gas hog. Rotary suffers from huge combustion surface area, short engine life and oil consumption. There are people that like them they are smooth, they have a certain feel.
Millenials like them because of the RX-7, Gran Turismo effect. Everyone who remembers their problems are old now, and their power density and exotic nature will always be attractive to people.

What was the engine lifespan on the RX-8? Wasn't it like 50k miles?

Mazda is pretty impressive though, they seem to be coming out with new technology all the time. I wish they would engineer some corrosion resistance into their vehicles.
27.gif
 
This is the Homogeneous charge compression ignition engine, the gasoline diesel with low NOx emissions and hopefully lower particulates and gasoline dilution. If it works and stays working, (combustion chamber and intake deposits have been and issue on some engines)it will be a good thing. Beware the early adopters.

Rod
 
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Originally Posted by maxdustington
Originally Posted by ragtoplvr
This is simply another version of stratified charge. Been out for many years. Used on a rotary it amounts to lipstick on a pig. It will still be a gas hog. Rotary suffers from huge combustion surface area, short engine life and oil consumption. There are people that like them they are smooth, they have a certain feel.
Millenials like them because of the RX-7, Gran Turismo effect. Everyone who remembers their problems are old now, and their power density and exotic nature will always be attractive to people.

What was the engine lifespan on the RX-8? Wasn't it like 50k miles?

Mazda is pretty impressive though, they seem to be coming out with new technology all the time. I wish they would engineer some corrosion resistance into their vehicles.
27.gif






Old myth. Mazda uses the same corrosion protection applications as the rest of the industry. The chassis are all dipped.
 
Originally Posted by maxdustington
Millenials like them because of the RX-7, Gran Turismo effect. Everyone who remembers their problems are old now, and their power density and exotic nature will always be attractive to people.

An old Mazda is rare sight around here. Even 10 years ago there weren't many around (I liked the 929). But they nailed it with their CUVs, they are everywhere now, quite a few Mazda3's too.
 
There are a ton of older Mazda 3's running around in my parts. Not so many CUV's although I can see the attraction after sitting in my friends CX-5. It's really nice.
 
Originally Posted by StevieC
There are a ton of older Mazda 3's running around in my parts. Not so many CUV's although I can see the attraction after sitting in my friends CX-5. It's really nice.

I should clarify, Mazda3 doesn't qualify as old for me. But I understand your point of view, when I drove to Alberta, I didn't see another 4th gen Maxima North of Las Vegas.
I drove 2 of my friends's CX-5s, I don't understand what the fuss is about.
 
Originally Posted by zorobabel
Originally Posted by StevieC
There are a ton of older Mazda 3's running around in my parts. Not so many CUV's although I can see the attraction after sitting in my friends CX-5. It's really nice.

I should clarify, Mazda3 doesn't qualify as old for me. But I understand your point of view, when I drove to Alberta, I didn't see another 4th gen Maxima North of Las Vegas.
I drove 2 of my friends CX-5s, I don't understand what the fuss is about.

I think rust takes care of most older Mazda models where they aren't sprayed annually. At least here anyway.

It wasn't until recently that they started to fix that problem so at least without rust proofing they would actually last a decent amount of time in the rust belted areas like where I am. There was even a video on this from Mazda about their improved rust resistance that was posted here a little while ago I think. Although I don't think rust is a problem where you are so maybe something else?

Our friends 2018 Mazda CX-5 is really smooth and refined.
 
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