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Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.

Mazda announces Takata expansion in US to 472k vehicles [UPDATE]

Update: Mazda is revising the total number of vehicles affected by its Takata airbag inflator recall downward to 464,684 units, compared to the original NHTSA documents showing 472,056. According to Mazda Public Affairs Manager Tamara Mlynarczyk to Autoblog, "It is my understanding that Mazda Japan will be submitting a revised Part 573 on Monday that reflects our numbers." The company's official statement on the recall is now included below. Mazda is the latest automaker in the US to officially announce the details of its expanded Takata airbag inflator recall. The company is broadening its campaign to cover a total of 472,056 vehicles. Mazda's airbag inflator recall covers now the front driver's side for the 2003-2008 Mazda6 produced between May 29, 2002, and May 5, 2008, the 2004-2008 Mazda RX-8 from between April 10, 2003, and February 18, 2008, and the 2006-2007 Mazdaspeed6 made between August 4, 2005, and June 29, 2007. Among these three models there are 444,907 units affected. This is an expansion from of the previous total of about 330,000 examples from 2004-2008. The passenger-side airbag of the 2004-2006 B-Series pickup is also being recalled for those with build dates between April 17, 2003, and May 2, 2006. There are 27,149 of these vehicles in need of replacement parts. Takata's airbag inflator recalls have affected 34 million vehicles nationwide from 11 automakers. In a recent hearing before Congress, Takata said it was producing 740,000 replacement kits a month and hoped to grow that to a million. Other suppliers have also started making the parts. Related Video: RECALL Subject : Driver's Frontal Air Bag May Rupture Report Receipt Date: JUN 04, 2015 NHTSA Campaign Number: 15V345000 Component(s): AIR BAGS Potential Number of Units Affected: 444,907 All Products Associated with this Recall Vehicle Make Model Model Year(s) MAZDA MAZDA6 2003-2008 MAZDA MAZDASPEED6 2006-2007 MAZDA RX-8 2004-2008 Details Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 2003-2008 Mazda6 vehicles manufactured May 29, 2002, to May 5, 2008, 2004-2008 RX-8 vehicles manufactured April 10, 2003, to February 18, 2008, and 2006-2007 Mazdaspeed6 vehicles manufactured August 4, 2005, to June 29, 2007.

2023 Honda Pilot and the promise and pitfalls of PHEVs | Autoblog Podcast #766

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Byron Hurd for a chat about the new 2023 Honda Pilot and its beefed-up TrailSport model. After that, we get a winter-weather long-term update on the BMW 330e care of Greg. Then, it's on to news. The big headlines this week were the brand-new Mazda CX-90 crossover and word that Genesis plans to build its outrageous (and expensive) X convertible concept. Is the world ready for a Bentley fighter from Korea? Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #766 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving 2023 Honda Pilot 2022 BMW 330e xDrive  News 2024 Mazda CX-90 three-row SUV revealed, with your choice of inline-6 or PHEV The ravishing Genesis X Convertible Concept is going into production Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.