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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.

2020 Mazda CX-9 gets more torque and second-row captain's chairs

The 2020 Mazda CX-9 is here, and it’s even more enticing than the 2019 model year SUV. ItÂ’s not a full redesign, but Mazda shook up the features list to make it more competitive with other three-row crossovers. Most notable (arguably) of all changes comes from a small increase in torque — the 2.5-liter turbocharged four-cylinder gets bumped from 310 pound-feet of torque to 320 pound-feet. Horsepower remains the same at 250 horses. Those figures are only applicable when using 93 octane fuel. They go down to 227 horsepower and 310 pound-feet of torque when on 87. Another new feature is an off-road traction assist button, replacing the traction control button. This new feature is meant to help when navigating rougher terrain. HereÂ’s how Mazda describes its function: “When the diagonal wheels lose traction, off-road traction assist will stop reducing the engine torque and increases the brake force on the wheels without traction. This transfers power to the wheels still on the ground to help allow the vehicle to regain traction and continue the drive.” WeÂ’ll be interested to see how this helps the CX-9 on a snowy Michigan winter day soon. The number of standard features on the base Sport trim is up, too. Now all CX-9s get heated front seats, a power driverÂ’s seat, rain-sensing windshield wipers, heated outside mirrors and auto high-beams. Additionally, Mazda made its full suite of i-Activsense safety features standard. This includes adaptive cruise control, lane-keep assist and other driver assistance niceties. Mazda is also adopting the new key fob design of the Mazda3 for the CX-9. Optional on the Touring and Grand Touring are second-row captainÂ’s chairs. Previously, Mazda only offered bench style seating for the CX-9, so this addition could be a huge turn-on for some folks in this segment. The chairs have armrests, and the lack of a center pull-down means Mazda had to redesign its cupholder layout in back. In CX-9s equipped with the chairs, the cup holders and USB ports are now integrated into the backside of the front center console. If you opt for the captainÂ’s chairs in the Grand Touring or Signature trims, the seats are heated.  Pricing does increase a fair amount for the 2020 CX-9. A base front-wheel drive Sport is now priced at $34,835 including destination, a $1,510 increase from last yearÂ’s base price. The top of the range only got $750 more expensive, though, as the Signature starts at $47,160.

Mazda recalls 1.37 million older vehicles for ignition switch short [UPDATE]

UPDATE: Mazda has confirmed to Autoblog that NHTSA's figures and list of effected models are accurate. Mazda is recalling 1,368,500 older vehicles in the US that date as far back as the late '80s because a potential short circuit in the ignition switch could cause a fire. According to the National Highway Traffic Safety Administration, the models include: 1990-1995 323 1993-1998 626 1993-1995 929 1989-1998 MPV 1993-1997 MX-6 1992-1993 MX-3 1990-1998 Protege Mazda reports that over time the grease around the switch's contact points can carbonize and become conductive, which can eventually lead to a short circuit. In some cases this results in smoke, but it could also lead to a fire. According to company spokesperson Tamara Mlynarczyk to Autoblog, there're no accidents, injuries, or fires in the US. Once the vehicle is running, the potential fault also doesn't affect drivability. Documents from NHTSA (as a PDF), indicate there was a fire in one of these vehicles in Japan in 2002 that could have been linked to this issue. The recall should begin in December. In its announcement of the issue below, Mazda reports 1.2 million vehicles affected and includes the 1990-1996 323/Protege. Autoblog has reached out to the company to understand the discrepancy. Related Video: RECALL Subject : Ignition Switch may Overheat Report Receipt Date: OCT 19, 2015 NHTSA Campaign Number: 15V674000 Component(s): ELECTRICAL SYSTEM Potential Number of Units Affected: 1,368,500 All Products Associated with this Recall Vehicle Make Model Model Year(s) MAZDA 323 1990-1995 MAZDA 626 1993-1998 MAZDA 929 1993-1995 MAZDA MPV 1989-1998 MAZDA MX-6 1993-1997 MAZDA MX3 1992-1993 MAZDA PROTEGE 1990-1998 Details Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 1989-1998 MPV, 1990-1995 323, 1990-1998 Protege, 1992-1993 MX-3, 1993-1995 929, 1993-1997 MX-6, and 1993-1998 626 vehicles. In the affected vehicles, grease applied to the contact points inside the ignition switch may become conductive and overheat. CONSEQUENCE: If the ignition switch overheats there would be an increased risk of a fire. REMEDY: Mazda will notify owners, and dealers will replace the ignition switch, free of charge. The recall is expected to begin December 15, 2015. Owners may contact Mazda Customer Experience Center at 1-800-222-5500, option#6. Mazda's number for this recall is 8715J.