ASH8

SKYACTIV-X next-generation engine

SKYACTIV-X in 2019.
SKYACTIV-X will be the world's first commercial gasoline engine to use compression ignition.*1

Technological innovations.

SKYACTIV-X is the world's first commercial gasoline engine to use compression ignition, in which the fuel-air mixture ignites spontaneously when compressed by the piston
A proprietary combustion method called Spark Controlled Compression Ignition overcomes two issues that had impeded commercialization of compression ignition gasoline engines: maximizing the zone in which compression ignition is possible and achieving a seamless transition between compression ignition and spark ignition.

Features

This new proprietary combustion engine combines the advantages of gasoline and diesel engines to achieve outstanding environmental performance, power and acceleration performance.
Compression ignition and a supercharger fitted to improve fuel economy together deliver unprecedented engine response and increase torque 10-30 percent over the current SKYACTIV-G gasoline engine.*3
Compression ignition makes possible a super lean burn*4 that improves engine efficiency up to 20-30 percent over the current SKYACTIV-G, and from 35-45 percent over Mazda's 2008 gasoline engine of the same displacement. SKYACTIV-X even equals or exceeds the latest SKYACTIV-D diesel engine in fuel efficiency.
With high efficiency across a wide range of rpms and engine loads, the engine allows much more latitude in the selection of gear ratios, providing both superior fuel economy and driving performance.


Moving forward Mazda hopes to help create a future in which people, the earth and society can coexist with cars, to enrich people's lives through a car ownership experience that celebrates driving, and to become a brand with which customers feel a strong emotional connection.



*1 As of August 2017. According to in-house investigations.
*2 Mazda's human-centered self-driving technology development concept. People enjoy driving while being revitalized mentally and physically. Meanwhile the car is driving "virtually" with a firm grasp of the movements of the driver and the car. In unexpected situations, such as a sudden loss of consciousness, the car will override the driver, automatically contact emergency services and drive safely to the most appropriate location. (me WTF!!)
*3 Engine is still under development and figures are subject to change.
*4 A condition in which the ratio of gasoline to air is reduced to a level that would not ignite in a spark-ignition engine.

ASH8

Above is an extract press release today.

I was under the impression this new HCCI engine was and is scheduled for the all new Mazda 3 (uses existing platform*).

More details @ the Tokyo MS in October this year.

Also we could see something 'RE' maybe @TMS, as Australian Motoring Press are still saying Mazda will release a RE RX-? (not hybrid or semi-electric, blah blah) by the end of this decade. IF this is the case then something will be shown (real prototype) this year or at TMS in 2019, might be 2019 for a 2020 release?

* Mazda has said that every model Gen will use the same platform for TWO model gen cycles, so we have the KE and KF current CX-5, the next gen in about 4 years will be all new including platform.

New Mazda 3 next year will still use current underbelly until next generation...etc, etc.

MattMPS

Based on the schedule of the RX-evolv and RX-8 concept (1999 and 2001 TMS) and the fact that in 2020 Tokyo will host Olympic (like 1964 --launch of Mazda Cosmo) i think that your hypothesis are correct, Ash8.

japanese are generally "predictable".

N.B for "that mx-5 thing" ,i confirm that is only available for JDM market (confirmed by a Mazda Japan source)

very interesting the HCCI engine...

I'm also very interested to next-gen products (after 2020) the "post-skyactiv era", i will hope for more RWD platforms into lineup.

zoom44

The SkyActivX will debut next month, September14 at Frankfurt. The first car with SkyActiv X is the Next Gen Mazda 3 which will debut at TMS in October.

Press are (predictably) already doing the 'Real Year' vs 'Model Year' mixup. The SkyActiv X Mazda 3 which go on sale in 2018 RY as a 2019 MY(US) vehicle.

zoom44

Images courtesy of Motor1.com https://www.motor1.com/news/176151/m...h-coming-2019/

fmzambon

Is there any technical description somewhere about how they actually control the exact ignition timing on a cycle-by-cycle and cylinder-by-cylinder basis?

From what I can guess, it may be that the air supply is used to alter the air fuel ratio in each cylinder and/or to increase the effective pressure in each cylinder to precisely control the ignition timing.
But I'm not sure about the spark plug role, as the "Spark Controlled Compression Ignition" name seems to imply that the spark plug is still used somehow...

comebackqid

iTrader: (13)

Ah, finally some good news! Maybe we will hear something about an RE with the same HCCI technology. Could an efficient rotary engine come from this? Is the laser ignition out of the window and being replaced by this? I guess it's irrelevant at this point.

This is great looks like I may be buying a new 3 with skyactiv-X some time within the next 2-5 yrs. I sure hope performance is boosted like the claims say, Really hope they can deliver on this it would really boost the brand.

Sure hope we get a new RE out this if possible, won't be holding my breath but would be very welcomed.

Jedi54

iTrader: (7)

comebackqid: http://jalopnik.com/the-next-generat...-ha-1797571665
saw that a few days ago and there's a mention to RE towards the end of the article.

zoom44

It definitely has something to do with the dynamic air supply. there is a supercharger involved as well. there will be more info at Frankfurt in a few weeks

they're using the spark for situations where they haven't been able to control/optimize the compression ignition. basically under any condition where they havent been able to iron out pre-ignition. the Reuters article mentioned "low temp" situations but the Mazda images suggest high rpm/load situations. But it looks like the whole system from the air supply to switching from HCCI to SI is Dynamic allowing for which ever mix is necessary.

fmzambon

Well, of course they can't run the engine on compression ignition 100% of the time. Still, that "spark controlled" part of the name seems to imply (to me) that the spark plug may be used even in the compression ignition mode.

gwilliams6

If you recall, there had long been rumors that the next RE car from Mazda would have sparkplug-less compression ignition. Maybe that will happen now, as mentioned in above linked article from Jedi54

SayNoToPistons

iTrader: (8)

This + Kodo 2 + Mazda Connect 2 + SkyA Chassis Gen 2 = Potential to sway me away from upmarket as a replacement for my CX-5.

MattMPS

More or less is the same for me with my GJ mazda6.

I will be happy and remain loyal to the brand if Mazda will return to an RWD platform for a midsize sedan (and correlated models), this is the way to go upmarket in my opinion.

In alternative, return to RE in more than one model (aka make a RE sports sedan).


my 2 cent for a real return of Mazda in premium segments.

gwilliams6

Mazda Will Build a Gas Engine that Doesn't Need Spark Plugs

R&T reports says it will use sparkplugs at low temps .

gwilliams6

Dissecting the Tech Behind Mazda's Revolutionary Gas Engine

Road & Track's analysis and "Engineering Explained" video ,with Jason Fenske ,dissecting Mazda's new engine technology.

zoom44

konradj

I'm sure the direct injection were starting to see more common with gas engines helps make this possible and improves with knock but I'm still wondering how well these engines will deal with knock

its also going to be interesting to see the battle between variable compression (crank based) by nissan and the variable compression talked about in the video (air injection based)

I enjoyed his parallel between mazda now and honda in the 90's because they're likely going to have to refer to the technology/theory behind the honda insight for lean burn (the double stoich ratios he discussed in the video)to avoid knock and preignition as the honda insight was capable of operation at 27:1 afr

fmzambon

I'm not sure whether this has been posted: https://www.scribd.com/document/3558...een&from_embed

Take a look at pages 19, 20 and 21

gwilliams6

R&T explains how an ozonator is key to making new Mazda engine design work.

The Secret Device That Could Be the Key to Mazda's Revolutionary Gas Engine

ASH8

here X is...

gwilliams6

Maybe shot in Germany ? Nice drone camerawork too.

sinkas

Geez thanks for sharing, pretty darned interesting stuff

zoom44

yes shot in Germany at the end of last week. Many of the Auto news outlets got to drive them. There were a total of 6 protos available to drive in auto and manual configs. the chassis underneath is also the all new chassis but the body is tacked on current body work. One report said that at speeds of 100 mph the auto was getting 40mpg

Mazmart

iTrader: (12)

I'm proud to be the first nerd to notice that the timing chain is in the rear, as are the two variable valve timing control units,

Paul.

zoom44

the video in the Jalopnik article http://jalopnik.com/mazda-s-holy-gra...ely-1801820285 has an engine-side talk with Mazda engineer Hidetoshi Kudo