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Mazda6 diesel engine delayed over low performance, still coming

Oh Mazda... we had many hopes for the promised diesel four-cylinder in the Mazda6, but those have remained largely unfulfilled, as the oil-burning powerplant has failed to appear on dealer lots following its 2012 LA Auto Show announcement. Despite engineering issues that forced the company to announce that the program was delayed back in September 2013, Mazda remains adamant that the 2.2-liter Skyactiv-D is still coming to our shores. "We're still very much committed to diesel," Mazda's North American CEO, Jim O'Sullivan, told Automotive News. "We are still working on getting the performance aspects up to where we want them, and we do have a plan – an engineering road map – to get it done." According to AN, Mazda's initial plan with the 2.2-liter diesel was to build an engine so clean it could get by without an aftertreatment system, which generally accounts for the price premium of diesel engines versus their gas counterparts. The new system has come with performance issues, though, necessitating the delays. "If [we were] a commodity brand and didn't care about that, it would be on the market right now," O'Sullivan told AN. "But I know the people were expecting something from us, expecting certain drive characteristics and performance, and I didn't want to disappoint them." While O'Sullivan's defense of the diesel Mazda is admirable, the exec stops short of giving us an indication of when the new engine will finally arrive.

Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.

2020 Mazda MX-5 Miata due for price bump, more safety tech

Mazda hasn’t released official information yet on its 2020 MX-5 Miata, but CarsDirect got its hands on an early draft of an order guide, which suggests both the soft- and hard-top versions of the roadster are due for a price bump after receiving more standard safety technology and some suspension upgrades on certain manual models. Starting price on the 2020 Miata Sport Soft-Top will be $26,580, not including destination, which is reportedly not yet listed, according to the report. ThatÂ’s $850 above the non-inclusive 2019 base price. The price hike on the Grand Touring trim is even higher, at $1,090. For the RF Club Hardtop, starting price inches up by $700 to $33,045 — again, excluding destination, which was $895 for 2019. If you want to drive stick, prepare to pay more for the Grand Touring manual versions, which will climb by $890 and $1,090 for the soft- and hard-top versions, respectively. ThatÂ’s down to new Bilstein shocks, a limited-slip differential, front shock tower braces and a sport-tuned suspension, which should make for fun driving for stick enthusiasts. The big news is that the i-Activesense suite of safety technologies, previously offered as a package, will go standard across all trim levels. It features lane departure warning, blind-spot monitoring, rear cross-traffic alert and low-speed automated braking. Apple CarPlay and Android Auto will also reportedly debut on both versions of the roadster as standard on Club trims and above. The Miata is already coming off a 2019 when it got an infusion of 26 more ponies and 3 pound-feet, bringing output to 181 hp and 151 lb-ft from its 2.0-liter Skyactiv-G inline-four engine, plus that limited-edition 30th Anniversary model. Looking ahead, Mazda is reportedly toying with the idea of electrifying its lightweight roadster for its next generation, expected mid-next decade. Related Video: