what the heck is SkyActive? (HCCI/hyper/EV updates) - Ford Inside News Community
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post #1 of 44 (permalink) Old 10-13-2015, 08:48 PM Thread Starter
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what the heck is SkyActive? (HCCI/hyper/EV updates)

having major resistance to research in general...




...and Mazda in particular since their beltlines+swooshes started making me seasick
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post #2 of 44 (permalink) Old 10-23-2015, 05:05 PM
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Re: what the heck is SkyActive?

Quote:
Originally Posted by 2b2 View Post
having major resistance to research in general...


Interesting.


Quote:
Originally Posted by 2b2 View Post
...and Mazda in particular since their beltlines+swooshes started making me seasick
Mazda's KODO design might not look good on small cars like the 3, but it works so well on the longer 6.
I think the 6 is one of the best looking mainstream mid-size sedans available today. It's up there with Ford's Fusion/Mondeo.
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post #3 of 44 (permalink) Old 10-23-2015, 10:12 PM
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Re: what the heck is SkyActive?

I agree on the 6, wonderful design!

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post #4 of 44 (permalink) Old 01-07-2016, 04:46 PM Thread Starter
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Re: what the heck is SkyActive?

starting at 4:45

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post #5 of 44 (permalink) Old 01-08-2016, 10:18 AM
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Re: what the heck is SkyActive?

Sky Active is like EcoBoost, a simple methodology of applying specific technologies in a direction toward fuel economy improvement.
IOW, it is marketing.

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post #6 of 44 (permalink) Old 06-01-2016, 12:17 AM Thread Starter
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Re: what the heck is SkyActive?

just gonna leave this here...

Turbo Tech of the 2016 Mazda CX-9: Taking A Closer Look
Why the CX-9 Doesn’t Offer Engine Stop-Start, and More
MotorTrend

Frank Markus - May 23, 2016


Much of the magic in the 2016 Mazda CX-9’s 2.5-liter turbo-four engine happens in the exhaust manifold. Its first trick is to plumb two paths into the turbo, a big one with a flow-control shutoff valve, and a smaller one. Mazda tech guru and former Sport Compact Car colleague Dave Coleman explains that at low engine speeds the valve shuts so that the smaller amount of exhaust gets forced through the little opening and onto the turbine a whole lot faster. He likens it to holding your thumb over the garden hose to spin that paint roller you’re cleaning way faster than the open hose would.

Coleman describes the engine’s next trick with another paint metaphor. You know how compressed air is used to suck paint out of a reservoir when airbrushing that rainbow and unicorn onto your custom van? That same trick leverages the initial burst of high-velocity flow exiting a cylinder whose exhaust valve has just opened, to help suck the residual exhaust out of an adjacent intake runner serving the cylinder that fired immediately before it. It’s called the “ejector effect,” and a unique, ultra-short four-into-three-into-one “pulse converter” manifold makes it happen.

All of this helps boost efficiency and broaden the torque curve, but Mazda wanted to ensure the 2016 CX-9 would deliver on the fuel economy promised by the EPA’s gentle testing, something most downsized turbo engines have trouble doing. To do this, Mazda needed a better way of keeping the cylinders cool during hard use than spraying in extra fuel that can’t contribute to propulsion (most hard-working turbos do this). The answer? Route some exhaust up to an intercooler in front and pump this cooled EGR back into the intake. This greatly increases the load point where fuel enrichment is required for cooling. Mazda expects the 2016 CX-9 to earn 21-22/27-28 mpg city/highway.

Oh, and after spending all that money to add an EGR cooler that doesn’t help on the EPA cycle, why didn’t Mazda invest in engine stop-start tech? Not enough payoff. This 2.5-liter doesn’t burn enough fuel at idle, and because most Americans don’t idle their cars for very long, the tech doesn’t warrant the couple hundred dollar expense of doing auto stop-start right. Coleman’s list of what’s needed to do it right: an extra 12-volt battery and a fancy crankshaft-position sensor that knows precisely where the engine is, even when it’s not spinning. This allows the starter to get the crankshaft into precisely the ideal position so that a cylinder is ready to fire, assisting a faster, less noticeable restart.
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post #7 of 44 (permalink) Old 07-26-2016, 09:50 PM Thread Starter
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Re: what the heck is SkyActive?

Mazda faces fight to maintain mpg lead
AutomotiveNews

Sharon Silke Carty - July 18, 2016


Mazda may be leading the race toward the U.S. government’s more stringent fuel economy targets, but it’s about to hit a hard ceiling.

The Japanese automaker has no plans to fully electrify any of its models and is angling to sell more crossovers rather than the small models that now make up the bulk of its sales...

Mazda's Masahiro Moro during a roundtable with Automotive News.
“For 2021, we are very confident that we will meet the CAFE standards,”
he said. “2025 is another story.”
...This year, Mazda became the first non-electric vehicle maker to hit 100 percent compliance with the 2016 CAFE standards, which called for a fleet average of 34.1 mpg. Before that, Tesla was the only automaker to meet the regulations, but its fleet is all-electric. Mazda’s entire lineup in the U.S. is powered by gasoline engines and includes no hybrids.

Mazda credits its Skyactiv system, a bundle of platform technologies and engineering tweaks, for propelling it to the front of the fuel-economy pack. Skyactiv-tuned engines squeeze greater efficiency out of the standard internal combustion engine.

Moro said the second generation of Skyactiv, which should be unveiled in 2017, will be the main driver toward meeting 2021 standards. Skyactiv 2 will use homogenous-charge compression ignition combustion engines, a technology that mimics the compression in diesel engines, which should further improve efficiency in gasoline engines.

But HCCI engines are a “very difficult and delicate technology,” Moro said, so Mazda is working to ensure the engines are durable...

...Since it has had such success maximizing internal combustion engines, Mazda is under less pressure to pursue hybrids and electric cars, Moro said. The automaker has one hybrid, the Mazda3, for sale in Japan. That car uses Toyota hybrid technology, and Moro said Mazda has no plans to bring it to the U.S.

But he admitted Mazda will probably have to embrace some kind of electrification plan to reach the 2025 CAFE goal of 54.5 mpg. Those hybrid systems will likely be small, used primarily to enhance the efficiency of gasoline engines, he said...

...The bigger looming issue is the zero-emission vehicles mandate that is baked into the 2025 regulations, Moro said. Nine states have adopted California’s mandate that 15 percent of new-vehicle sales be zero-emission vehicles.

“To me, the biggest regulatory headache right now is ZEV,” he said.
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post #8 of 44 (permalink) Old 07-26-2016, 10:48 PM
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Re: what the heck is SkyActive?

...This year, Mazda became the first non-electric vehicle maker to hit 100 percent compliance with the 2016 CAFE standards, which called for a fleet average of 34.1 mpg

They forgot to mention that Mazda is also NOT a full line manufacturer. No high volume full size pick-ups, SUVs or commercial trucks and vans. If Mazda could not meet a 34.1 mpg average with sub-compact, compact and midsize sedans and CUVs, they would be in serious trouble.
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post #9 of 44 (permalink) Old 07-26-2016, 10:55 PM
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Re: what the heck is SkyActive?

This 2.5-liter doesn’t burn enough fuel at idle, and because most Americans don’t idle their cars for very long, the tech doesn’t warrant the couple hundred dollar expense of doing auto stop-start right.

That just sounds like an excuse for not funding research and development. Same with why Mazda has no plug-in or electric vehicle in 2016.

...don't idle their cars for very long??? On my short commute, I have three lights that if missed, are all about 3 to 5 minutes long. Just going and coming, if lights are missed both ways, that's over 20 minutes of idling on a 11 mile round trip per day.
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post #10 of 44 (permalink) Old 01-17-2017, 06:54 PM Thread Starter
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Re: what the heck is SkyActive?

süpertitle: we don't need no stinkin' sparkplugs
Spark-free SkyActiv: Mazda Seems Well Prepared for the Future, Without Electricity’s Help

TTAC

By Matt Posky on January 16, 2017


...Mazda’s SkyActiv technology is well suited for squeezing out an engine’s true potential, but it doesn’t feel particularly quirky or unique.
That could change with the company’s second generation of SkyActiv engines. Mazda is one of only two automakers planning to introduce a motor with homogenous charge compression ignition (HCCI) sometime next year. If you’re unfamiliar, that’s a direct-injection gasoline-powered motor that uses compression, not spark, to ignite fuel — something typically reserved for diesel powerplants.

Mazda expects the HCCI engine to yield a 30 percent improvement in fuel economy...

...According to the Nikkei Asian Review, the second generation SkyActiv engines should give the Mazda3
{mce in 2018} fuel economy “approaching 30 km per liter.” While only a rough estimate, that equates to over 70 miles to the gallon — enough to put hyper-mile hybrids to shame and meet stringent CAFE standards...
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