what the heck is SkyActive? (HCCI/hyper/EV updates) - Page 2 - Ford Inside News Community
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post #11 of 44 (permalink) Old 01-18-2017, 02:21 AM Thread Starter
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Re: we don't need no stinkin' sparkplugs

saw a post by a rocket scientist elsewhere about HCCI
that sounded like it'd mainly be for hyper-mpg on the highway
it also speculated about being turbo'ed for when Not in HCCI
imho
if HCCI needs help with city driving and accelerating, combining with hybrid-electric could be more likely
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post #12 of 44 (permalink) Old 01-18-2017, 04:06 AM
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Re: what the heck is SkyActive?

I wonder how many of these advanced technologies are more about achieving "wonderful" numbers that can't be fully
replicated in real world driving. The Mazdas with SkyActiv try hard but their compression is limited in Nth America
so their full worth is not realized. Also, if mazda doesn't advance beyond a fast lock up 6-speed auto, they'll get passed.
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post #13 of 44 (permalink) Old 07-11-2017, 11:47 PM Thread Starter
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Re: we don't need no stinkin' SkyActive! (whatev it was)

Mazda's new engine boosts fuel efficiency by 30%
Nikkei
- January 9, 2017 2:00 am JST

Automaker plans to offer cars with the new technology next year

TOKYO -- Japanese automaker Mazda Motor will introduce a new engine at the end of 2018 that offers 30% better fuel efficiency by using pressure, not spark plugs, to ignite fuel.

This will be the first practical application of the technology, called homogeneous charge compression ignition ( HCCI ). Though the automaker is developing environmentally friendly electric vehicles, Mazda thinks the internal combustion engine will continue to account for the majority of new-vehicle sales for the foreseeable future and that the company's technology will give it a leg up on the competition.

Mazda plans to incorporate the new engine in 2018 in the new Mazda3, dubbed Axela in Japan, which will undergo its first overhaul in five years. The engine then will be adopted gradually by other models. The automaker positions the engine as the second generation of its Skyactiv suite of environmentally friendly technologies, which were introduced in 2011.

The new engine ignites the mix of fuel and air by subjecting them to pressure, making combustion more efficient than conventional engines using spark plugs. This method also reduces exhaust emissions.

Varied configurations among models make simple comparisons difficult, but the new engine would give the current Mazda3 mileage approaching 30km per liter, according to estimates. ( just over 70MPG )

Mazda will start mass-producing electric vehicles by 2019 and plans to have a plug-in hybrid as of 2021. The automaker is targeting the U.S. and European markets, where environmental regulations are becoming stronger, but the company plans to incorporate the engine in autos built for the global market, including developing nations, by at least 2030.
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post #14 of 44 (permalink) Old 08-09-2017, 03:55 AM Thread Starter
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Re: what the heck is SkyActive? (HCCI update)

via MotorAuthority Sept.2016 article
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post #15 of 44 (permalink) Old 08-09-2017, 04:54 PM Thread Starter
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Re: what the heck is SkyActive? (HCCI update)

Mazda could have the tech to save the internal combustion engine
Compression ignition boosts efficiency up to 30 percent...claimed

TheVerge.com
- Zac Estrada - Aug 8, 2017


...Mazda announced on Tuesday that it would introduce a gasoline engine that doesn’t always need spark plugs to ignite the fuel and air mixture and promises greater efficiency along the lines of a diesel engine. Instead, it finds the most efficient way to operate depending on driver demands, various settings in the car, and external conditions. Spark Controlled Compression Ignition**, as Mazda calls its proprietary system, works because it behaves more like a traditional gasoline engine despite the diesel-like technology and having a supercharger to boost power, the company said...
( ** guess it could be pronounced "SKY" )

...The setup is basically what’s known as homogenous charge compression ignition, and it’s based off of lots of existing technology that other companies have long looked into. Ford and General Motors are just two companies that have been experimenting with it in the last decade or so, but haven’t been able to put it into production yet.

Mazda released few other details about the engine other than it would be released in 2019, likely in the new Mazda 3. It’s expected the compression ignition engines will replace most, if not all, of the company’s internal combustion engines around the start of the next decade...
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post #16 of 44 (permalink) Old 08-09-2017, 11:31 PM
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Re: what the heck is SkyActive? (HCCI update)

Ford, PSA Developing HCCI Diesel
Oct 11, 2006 William Diem | WardsAuto
PARIS – Ford Motor Co. engineers in Europe are developing a V-6 diesel aimed at meeting rigid nitrogen oxide emissions rules in Europe and North America without expensive exhaust aftertreatment.
http://wardsauto.com/news-analysis/f...ng-hcci-diesel

The experimental diesel, based on the 2.7L V-6 engine Ford manufactures with PSA Peugeot Citroen in Dagenham, U.K., uses a combination of Homogeneous Charge Combustion Ignition (HCCI) cold combustion as well as ordinary diesel combustion.

But its real innovation is a new strategy for controlling combustion. Instead of adjusting the oxygen intake to match the demand for fuel, Ford has developed an engine controller that adapts the fuel injection to the oxygen available.

Changing the amount of air that reaches the combustion chamber is a slower process than altering the amount and timing of the fuel injection, says Christian Vigild, engineer at Ford’s diesel powertrain research center in Aachen, Germany.

Vigild presented research on the diesel engine, which is being developed by Ford and PSA under their Gemini project, at a 2-day academic conference here.

More than 100 international engineers and scientists attended presentations on how to better design electronic controls, mainly for HCCI engines and hybrids.

HCCI is a system that works at lower temperatures – 3,452° F (1,900° C) – than either gasoline or diesel combustion. Lower temperatures mean less NOx emissions.

By “putting the rabbit on the back of the turtle,” Vigild says low-temperature combustion is more complete even when accelerating in the HCCI mode.

One approach to getting better combustion is to measure the pressure inside an engine cylinder so the engine control unit knows what is happening. However, such sensors are expensive.

Vigild says Gemini's approach of adjusting the fuel injection to match the oxygen available provides better control during transitions.

“We tried to keep it simple from the start,” he says. “We wanted a design that did not require a pressure sensor in each cylinder.”

Without giving numbers, Vigild indicates the experimental engine had "very low" NOx output in a midsize car such as the Ford Mondeo.

But the project is unlikely to see production before 2012, when Euro VI rules are expected to be in place.

And if a cheaper system of aftertreatment for diesel NOx production is invented, it could prove to be a better economic alternative, Ford engineer Charles Tumelaire concedes.
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post #17 of 44 (permalink) Old 08-09-2017, 11:38 PM
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Re: what the heck is SkyActive? (HCCI update)

Now with diesel being banned in many European cities, my guess is that the HCCI diesel plan has been canned.
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post #18 of 44 (permalink) Old 08-09-2017, 11:47 PM Thread Starter
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Re: what the heck is SkyActive? (HCCI update)

^ I was thinking earlier today
"too bad Yurpland already decided on legislation outlawing diesels...
...and even petrol"

Quote:
Originally Posted by WardsAuto
...The experimental diesel, based on the 2.7L V-6 engine Ford manufactures with PSA Peugeot Citroen in Dagenham, U.K., uses a combination of Homogeneous Charge Combustion Ignition (HCCI) cold combustion as well as ordinary diesel combustion...

...Without giving numbers, Vigild indicates the experimental engine had "very low" NOx output in a midsize car such as the Ford Mondeo...
unless it's an extremely SHRUNK variant of the 2.7
this HCCI process must really kill the power
cuz
there's No Way they'd put a 2.7 DIESEL in a Mondeo ... except for a superHPO

...afaik

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post #19 of 44 (permalink) Old 08-15-2017, 04:16 AM Thread Starter
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Re: what the heck is SkyActive? (HCCI update)

a bit too late for me to watch (& comprehend) just now...


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post #20 of 44 (permalink) Old 08-15-2017, 08:02 AM
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Re: what the heck is SkyActive? (HCCI update)

This certainly has Ford’s attention, who has been working toward HCCI for decades now. Very curious what it will look like, and their claims are 20-30% btw. But again, that’s all relative. A 20% gain, for example, relative to their NA engine is of course impressive, but a bit less so relative to a GTDI engine, that is already seeing it’s own substantial gains over NA.

Like Trump likes to say, we shall see what we see.

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