Mazda SkyActiv Diesel Engine

mysql

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I have limited experience from owning a 1986 Mazda RX-7.
You do know that you are supposed to remove or gut the catalytic converter and just mix 2-stroke oil into the gas, right? That eliminates all possibility of seal failure from any oil injection pump failures.
No, you are not "supposed to" do that, as removing the emissions is illegal.

But yes, I have run the Sohn adapter, using 2 stroke oil instead of engine oil, as well as premixing. Idemitsu oil being designed for this purpose.
 

bhtooefr

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First off, any rules that applied back in 2001, when your ALH was made, don't apply today. (Laws of physics, OTOH...)

VCDS a 2009+, and see where your main injection event is. (It may well be around TDC, but I suspect the timing is very much retarded in a desperate attempt to keep NOx down.)
 

rhinotalon

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Wonder how long it will take to get all the bugs out? The complex something is...the more opprotunity for something to go wrong.
 

vdubdezl

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"It features one small and one large turbocharger, which are selectively operated according to driving conditions. The small, quick-responding turbo feeds air to the combustion chambers at low engine speeds to provide low-speed torque and eliminate “turbo lag”. Turbo lag is characterised by abnormally low torque and poor throttle response."

THis is what would worry me the "selected" turbocharger. Usually when you have two turbos, one is low pressure and the other is high pressure. The low pressure one gets it turning and feeds the high pressure. This setup is just teed together. Very weird! Just don't see how that could be very efficient!
 

bhtooefr

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The 335d uses a similar system - it's sequential, rather than compound.

In a compound, you spin a big, low-pressure turbo designed to spool quickly, and then once that turbo's spooled, you start to spin a small, high-pressure turbo, feeding the high-pressure turbo's inlet with the low-pressure turbo's output.

In a sequential, you spin a small turbo designed to spool quickly, as well as a big turbo after the small turbo, then once a conventional big turbo is spooled, flow into the intake is diverted from the small turbo to the big one.
 

kjclow

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BeetleGo

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LRTDI

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RIP 16 GSW... Just the LR diesel now
The only way for diesels to really take off in the USA is for companies to start sharing the engine cost and development.

So if Mazda does certify this engine for the USA, can diesel Focus' be far behind?
 

German_1er_diesel

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Ford does not share anything but the 1.6 diesel with Mazda. I don't think there's a reason for Ford to adopt this engine instead of their current collaboration with PSA. Volvo uses the 1.6 PSA diesel too, and the Ford/PSA 2.2L diesel is available in the Jaguar XF, the Range Rover Evoque, the Ford Mondeo, the Citroën C5 and the Peugeot 507... isn't that enough sharing, and more likely to have good economies of scale than a Mazda-only engine?
 

kjclow

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However, the Ford/PSA motor is not EPA certified. The Mazda will probably never be either, but at least their still talking about it.
 

bhtooefr

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And, Ford has used Mazda diesels in the US, while having a diesel of their own design in the European version of the same car, before - the 3rd-gen Euro/1st-gen US Escort.
 

Oberkanone

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BeetleGo

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If Mazda's Skyactiv-D is all that it's cracked up to be, I will definitely be recommending it to people as an alternative to the Golf, which I personally really (really) like. Why? Competition baby. I think that's always good, and Mazda is the most closely matched car company with VW in terms of sport, size, packaging, and increasingly interior/exterior quality.
 

Smaug

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I'll be in the market for a new car shortly and was waiting for the Mazda diesel in the 2012 model. Dissapointing they postponed it.
 

wxman

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Another perspective of the Mazda SKYACTIV presentation...

http://www.greencarcongress.com/2011/08/skyactiv-20110804.html

...The 2.2L SKYACTIV-D engine reduces fuel consumption compared to the current 2.2L MZR-CD diesel by 20% due to a low 14:1 compression ratio and subsequently greater expansion phase after combustion. SKYACTIV-D is also one of the first diesels to comply with Tier II Bin 5 North American emission regulations without requiring expensive selective catalytic reduction (SCR) aftertreatments or a lean NOx trap catalytic converter (LNT)....
(Emphasis added)
 

manual_tranny

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Mazda needs to take this fancy anti-knock technology and apply it to their rotary engine. Anything to avoid detonation!
 

Mike_04GolfTDI

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I'll be in the market for a new car shortly and was waiting for the Mazda diesel in the 2012 model. Dissapointing they postponed it.
Are you sure postponed is the correct term?

My impression is that Mazda never intended to bring it to the US market, and are not planning to in the future.

(Yes, I know there were rumors about it, but that's all they were. Did a representative from Mazda ever actually say they were going to sell a diesel in North America? I don't think they did.)
 

wxman

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...Did a representative from Mazda ever actually say they were going to sell a diesel in North America?...
Actually, yes, or at least it was a press release on the Mazda web site...


http://www.mazdausamedia.com/conten...nd-diesel-powertrains-us-market-2011-and-2012

...As a follow-up to SKY-G and SKY-Drive, Yamanouchi added, "We plan to launch the SKY-D engine mated to Sky-Drive in the U.S. in 2012." Mazda plans to incorporate the extremely fuel-efficient SKY-D engine into its next-generation mid-sized diesel car, allowing highway fuel economy of up to 43 miles per gallon - which is better than today's mid-sized hybrids - and a 20-percent improvement in fuel efficiency over Mazda's current 2.2-liter diesel. When launched in the U.S., SKY-D will meet Tier 2 BIN 5 regulations, one of the toughest emissions standards in the world. Because of Mazda's proprietary catalyst technology, SKY-D does not require urea after-treatment to meet the strict North American emissions standards....
 

JSWTDI09

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Interesting indeed, but I'll believe it when I see it. Promises are easy, delivering on them is not always so easy. I hope it happens as stated, but I'm not holding my breath.

Have Fun!

Don
 

MrBigTruck

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The first thing I thought was "that thing will never warm up with a 14:1 compression ratio." Then I read further down that they had addressed it with variable valving. Interesting.

I guess my heart still belongs to VW because I've been around them since the late 70's (dad's Rabbit). It's interesting to see other companies getting on board. It still feels like they're piggybacking on the market that VW actually created though. But at the end of the day competition is a good thing.
 
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