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How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.

Mazda specs new MX-5 Miata with accessories

It's been 26 years since Mazda showcased the original Miata at the Chicago Auto Show, and now it's returned with a conceptual take on the new model, decked out with all the accessories and optional equipment your roadster-loving heart could desire. Or at least some of 'em, anyway. This show car is painted Ceramic Metallic (Zoom Zoom-speak for "white") and spec'd out with a full aero kit (including front air dam, side sills, rear skirt and lip spoiler) all done up in gloss black, 17-inch BBS wheels and Brembo brakes with red calipers. Mazda is also showcasing a carbon-fiber luggage rack for the new MX-5 that weighs less than two pounds and includes and integrated brake light. "The concept parts and accessories we have showcased at the Chicago Auto Show," said Mazda's North American chief Jim O'Sullivan, "were developed to give customers a look at what is possible for the new cars to make them truly one-of-a-kind, adding to that excitement." See them shown off in our high-res gallery of live photos, above. MAZDA UNVEILS 2016 MX-5 MIATA ACCESSORIES CONCEPT DESIGN AT CHICAGO AUTO SHOW CHICAGO, Feb. 12, 2015 -- The only thing better than the all-new 2016 Mazda MX-5 Miata is a personalized 2016 Mazda MX-5 Miata. Today at the Chicago Auto Show, where the first-generation MX-5 Miata was introduced to the world in 1989, Mazda revealed an MX-5 accessories design concept of the next-generation roadster that will hit showrooms this summer. At the Chicago Auto Show, Mazda revealed a 2016 Mazda MX-5 Miata accessories design concept for the next-generation roadster that will hit showrooms this summer. "There is so much MX-5 history at the Chicago Auto Show, and we wanted to continue building on that," said Jim O'Sullivan, president and CEO, Mazda North American Operations. "The MX-5 is the soul of our company, and its enthusiast following both inside and outside of Mazda drives us to keep innovating new ideas for it and the rest of our lineup." Painted Ceramic Metallic, the 2016 MX-5 accessories concept will be on display from Thursday, February 12 through Sunday, February 22 and includes an Aero Kit, BBS Wheels and Brembo Brakes as well as a Luggage Rack shown separately in Mazda's display. MX-5 concept accessories include: - Aero Kit (Front Air Dam, Side Sill Extensions, Rear Bumper Skirt and Rear Lip Spoiler): The gloss-black Aero Kit is the same package found on the 2016 MX-5 Global Cup Car that debuted at SEMA in November.

Chicago Auto Show: The really big reveals from shows past

The 2024 Chicago Auto Show may seem like a shell of its former self, but it still holds the title of the largest consumer auto show in the United States. It didn't get that reputation simply by being efficiently produced or convenient for locals desperate for something to do in February — it earned it over decades of breaking automotive news and powerhouse reveals, eventually earning an informal designation as America's truck show.  2024 may be a down year for Chicago, but let's not forget all of the great things that have come out of it, historically. Here's a look at some of our staff favorites. Bet you didn't know about a few of these cars that were first revealed in the Windy City.    2008 Dodge Challenger SRT-8  I didn't just pick this one as a former Challenger owner, but instead to illustrate just how many cool Chicago debuts we take for granted. Chrysler often chose its home turf to debut new cars, so the few times its unveilings happened elsewhere tend to stick in our minds. The first Challenger SRT-8 was kind of garbage, if we're being honest. I mean, who buys a race-bred, V8-powered muscle car without a limited-slip differential? But the SRT-8 formula evolved over time into something truly special, and what we saw in Chicago was essentially the early version of the Scat Pack, which was ultimately very successful for Dodge. And who would have thought we'd be here, 15 years later, still talking about that debut? And still loving these big Mopars, flaws and all. — Associate Editor Byron Hurd SHO time in Chicago IÂ’ll always have a certain fondness for the return of the Taurus SHO at the 2009 Chicago Auto Show. Chicago has always leaned truck and van heavy for press reveals, but every now and then, as this list illustrates, something spicy would appear. The return of the SHO as a high-powered successor to the original that ran from 1989-1999 gave enthusiasts hope for FordÂ’s performance business, especially for sedans. With a 3.5-liter EcoBoost V6 packing 365 hp, all-wheel drive and five-spoke wheels, the SHO was a nice upgrade from the lower-rung Taurus models. It was a bit more sedate than the original SHOÂ’s Yamaha-sourced V6 that teamed with a five-speed manual transmission, but still a worthy response to the Chrysler 300, Dodge Charger and later the Chevy SS. The SHO — Super High Output — begat things like the Fusion ST and gave Ford solid four-door performance for the rest of the decade.