Cooley On Cars
Car Tech 101: What is Skyactiv technology?CNET's Brian Cooley explains Mazda's Skyactiv gas engine technology and how it works.
So what -- sky active technology. Basically it compresses the air fuel mixture to a much higher degree than you normally see in a production gas engine car. Up to fourteen to one ratio which gas engines don't normally approach that's actually working on -- levels of compression. What's the big deal when you get a lot more out of that -- and when you do that actually make better use the fuel to get more power. On the other hand is against downside high compression engines wanna -- decade or spark knock in other words -- -- before the spark plug even those off. That causes all kinds of problems -- power durability and efficiency of Julius so what you do. First of all they've created a very interesting exhaust architects. Where these long exhaust blunders -- the hot -- away. And blend -- -- there on the engine. That's good because once -- -- firing up hot gas doesn't perfectly into an adjacent cylinder which a lot of other designs we'll get. Secondly they're using a -- and it's not enhancing our video what heavy and they're all about -- -- -- -- built in the head. And a hemisphere will instantly -- up there that don't really compress everything. They're doing that but they also have a little well aren't that in the top with a bit of which allows the victims' names of the -- they -- before it takes over the whole still. And I -- using direct injection was a lot of carmakers feeling but that has a lot of benefit here it gives you very precisely meters of gas -- it there until it really needs to be. If you blow up early and because it's injected like the facility -- the gasoline is -- Because it didn't have to run down a hot and take water and hot intake port on its way to the cylinder that also help prevent that -- -- mark wants that to happen. Bottom line must tickling them. 15% improvement in both fuel efficiency and -- using sky active. But remember the typical gas engine only -- about 30% efficiency from a gallon of fuel wasting the remainder has dissipated heat. So 15% better than that isn't exactly game changing but it helps. Also the sky active -- that are sold in west we'll have their compression ratio dropped to a still lofty thirteen to one. The concession being made so we can beat them regular gas.