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The Pub For General Automotive Related Talk |
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#1 | ||
FF.Com.Au Hardcore
Join Date: Sep 2014
Location: Catland
Posts: 3,660
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Interesting development, 30% claimed economy increase, diesel-like compression, will run on petrol, and not use spark plugs.
Some time ago I read an article detailing how an engine would be best developed purely for ethanol, this comes close on the compression at least. Are we seeing a time where petrol and diesel engines will converge? http://www.motoring.com.au/mazda-pio...engine-105514/ http://www.autoblog.com/2017/01/16/m...nes-hcci-2018/ https://en.wikipedia.org/wiki/Homoge...ssion_ignition http://thenewswheel.com/mazda-to-int...-tech-in-2018/ With their 6 speed auto, interiors and handling nous, should be quite a good car.
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I6 + AWD |
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#2 | ||
Regular Member
Join Date: Jul 2015
Location: Sydney NSW
Posts: 70
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Sounds interesting.
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Cogito ergo sum |
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#3 | ||
FF.Com.Au Hardcore
Join Date: Oct 2008
Location: Victoria
Posts: 7,854
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Interesting Mentions a couple of things other companies struggled with pre ignition and lack of revs.
I'm thinking they will use a high pressure fuel system like the do on Common rail Diesels to solve the pre ignition lack of revs might be a bonus for emissions, no mention of power figures But I would expect more torque than diesels..
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______________________________ 2015 Territory Titanium RWD Diesel - SOLD 2016 BMW X5 xdrive 30D Msport Seadoo Challenger 210SE 310HP |
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#4 | ||
Falcon RTV - FG G6ET
![]() Join Date: Mar 2007
Location: In Da Bush, QLD
Posts: 31,387
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No mention of how 18:1 compression would work with say 98octane fuel.
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BAII RTV - with Raptor V S/C. RTV Power FG G6ET 50th Anniversary in Sensation. While the basic Ford Six was code named Barra, the Turbo version clearly deserved its very own moniker – again enter Gordon Barfield.
We asked him if the engine had actually been called “Seagull” and how that came about. “Actually it was just call “Gull”, because I named it that. Because we knew it was going to poo on everything”. |
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#5 | ||
FF.Com.Au Hardcore
Join Date: Feb 2006
Posts: 713
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Ethanol or methanol seems to work well with high comp
Is it leading to high juice fuels like that? It will smell like a speedway soon There is a petrol model plane engine that runs on glow plug and that seems good , and throttles OK Its getting blurred
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#6 | ||
FF.Com.Au Hardcore
Join Date: Apr 2012
Location: Taromeo
Posts: 10,487
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We used to run a high compression 366 Chev race engine on diesel, just because we could.
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#7 | ||
Kicking back
Join Date: Dec 2013
Location: Western sydney
Posts: 8,584
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I find this an interesting creation. I'm guessing it's direct injection as it to me appears to manage to time the detonation via injector timing not valve timing. I'm interested in the start up procedure because unless there is a glow plug of sorts, wouldn't the cold motor detract from the heat of the compression?
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#8 | ||
FF.Com.Au Hardcore
Join Date: Oct 2008
Location: Victoria
Posts: 7,854
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mmm glow plugs & Petrol, would that make a big bang?.
It may need to use decompressed cylinders with spark plugs to start
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______________________________ 2015 Territory Titanium RWD Diesel - SOLD 2016 BMW X5 xdrive 30D Msport Seadoo Challenger 210SE 310HP |
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#9 | ||
Kicking back
Join Date: Dec 2013
Location: Western sydney
Posts: 8,584
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Maybe variable valve lift is used to help regulate air in the combustion chamber, but I don't know. It's probably got a rediculous amount of systems to make it function.
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#10 | ||
FF.Com.Au Hardcore
Join Date: May 2005
Posts: 1,138
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I read it is HCCI at low revs then the spark plug kicks in after a certain RPM.
Also won't low octane fuel mean the CR won't need to be as high? or do i have that mixed up? Also read in Wheels recently now that the downsizing trend is over (now more about rightsizing) they are working on a naturally-aspirated V6- probably with this tech. God I hope so, seems like this and Koenigsegg's Freevalve could be the final salvo of naturally aspirated big engines. |
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#11 | ||
Boss 335
Join Date: Jan 2006
Posts: 4,330
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But would the engine go clackety-clack like a diseasal ?
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#12 | ||
FF.Com.Au Hardcore
Join Date: Feb 2005
Posts: 5,052
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A variant of this is now being used in F1 ... https://www.motorsport.com/f1/news/a...battle-690156/
F1 engines are now delivering close to 50% thermal efficiency, which makes them greener than EV's. |
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#13 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 4,941
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So when is a diesel not a diesel?
Remember that despite common usage, diesel refers to the engine, not the fuel. I remember when some servo chains used to label it (correctly) as "Distillate" but that just seemed to confuse people. |
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