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Mazda is already discussing Skyactiv 3 as well

Mazda only recently started introducing its Skyactiv engines to its different vehicle models, but the automaker is already talking about the upcoming Skyactiv 2 -- and even Skyactiv 3 -- engines for the next decade and beyond. 
According to a new report from Automotive News, Mazda plans to gain 30 percent better fuel economy with its Skyactiv 2 engines, which are expected to have a 2020 release date. A 30 percent improvement in fuel economy would make the already impressive Mazda3 rise from 29/41 mpg (city/highway) in its more efficient trim to 38/53 on regular unleased gasoline.

2014 Mazda3

Mazda plans to achieve this 30 percent increase in fuel economy by improving the internal combustion of the Skyactiv 2 engines. More specifically, the Skyactiv 2 engine's compression ratio would be bumped up to 18:1 from a current level of 14:1. 
This higher compression is able to reach the same combustion temperature as the current engines, but with a leaner mix of fuel -- meaning improved fuel economy. 
The Skyactiv 2 engines will utilize homogeneous charge compression ignition (HCCI), which compresses the fuel-air mixture to a high enough pressure and temperature that it ignites by itself without needing a spark. This allows for more complete fuel combustion and lower nitrogen oxide emissions.
However, the Automotive News report indicates that HCCI won't come easy. Engineers must first expand the range of engine speeds for HCCI specifically, because the engine revving too quickly can result in a misfire due to the high number of revolutions, and if revved too slowly, it can misfire due to low temperatures.

2.0-liter Skyactiv four-cylinder engine
Aside from that, engine cooling and the engine's tendency to behave differently based on the use of different fuels need to be figured out.
The main goal with Skyactiv 2 is to meet European carbon dioxide emissions standards of 95 grams per kilometer in 2020, but Mazda is looking even further ahead at meeting Europe's standards of 65 grams per kilometer in 2025 with Skyactiv 3. 
Mazda didn't go into great detail about Skyactiv 3, but the automaker plans to make more energy available for powering the wheels by limiting the fluctuation of heat in the combustion chamber and reduce losses from exhaust and cooling. Mazda hopes to reach well-to-wheel carbon dioxide emissions with Skyactiv 3 that rival electric vehicles.
Mazda first introduced Skyactiv engines to the U.S. market in 2011, starting with the Mazda3 sedan. Since then, they've been added to the Mazda6 sedan and CX-5 crossover.
Mazda has been trying to bring the Skyactiv-D diesel engine to the U.S. via the Mazda6, and was supposed to have achieved this by the second half of 2013. However, in September of last year, it was announced that delays in emissions testing has pushed that timetable to late spring of 2014.

Source: Automotive News

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RE: Hmmm
By Concillian on 1/7/2014 2:04:53 PM , Rating: 2
Tax dollars? Where do you live that tax dollars go for driver's ed? I had to pay for my own driver's training classes (California). Did something happen since 1991 when I learned to drive that tax dollars are being used to educate drivers?

I guess you could say tax dollars are used to test drivers, but by and large that funding comes from DMV fees, which are optional "taxes."

I parallel park less than 5% of the time I park, but I had to do that on my driving test. less then 5% of my turns are 3 point turns, but a driving test needs to make sure you know how to handle that situation. Why is it a bad thing to require people have basic knowledge of how to operate a transmission belonging to 10-20% of cars on the road? It obviously can't be required for the driving test, but there should be material in the written portion so there's at least a basic understanding.


People hate manuals in traffic because they feel that a quarter car length gap between them and the car in front of them must be filled immediately or it's like the end of the world or something.

Check how truckers drive in traffic... they pick a gear that's about the average speed and idle forwards in that gear. This causes gaps to get created and then shrink in front of them, but the truck still goes at roughly the same speed it otherwise would have. Not only is that the easiest way to drive in traffic, it's the most fuel efficient way AND it smooths traffic in that lane for less of the annoying stop and go BS.

So you end up with a gap in front of you. Don't worry, those brake lights will come again soon enough.

"It's okay. The scenarios aren't that clear. But it's good looking. [Steve Jobs] does good design, and [the iPad] is absolutely a good example of that." -- Bill Gates on the Apple iPad

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