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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.

2016 April Fools' Day: Morgan digs at Tesla, Mini's scissor doors, more

Every year automakers go out of their way to come up with gags for April Fools' Day. Sometimes the jokes fall flat, but occasionally a company really nails it with an idea that we'd actually love to see. Rather than scouring the Web for all of these stunts, you can find some of our favorites right here. Morgan MOGrod The Morgan Motor Company's MOGrod is one of our favorite April Fools' jokes so far this year because it's a car we wish could be real. The company says on Twitter that the retro hot rod uses a 3.7-liter Ford V6, and there are already 250,000 preorders, which is a play on the huge number of reservations for the Tesla Model 3. Morgan took the joke even further by sketching a landspeed record version for the Bonneville Salt Flats. Mini Scissor Doors The people at Mini apparently have a lot of free time because the company has two gags this year. The first is the scissor door option. The idea cleverly plays on the myriad ways customers can customize their Mini, but this solution doesn't look like anyone could easily enter the car due to the way these doors open. Mini Hipster Hatch There's also the Hipster Mini, which is a much funnier idea. This fictional hatchback would be perfect for fashionable Millennials thanks to features like Instagram-filter windows and a fixed-gear drivetrain, which limits the top speed to 25 miles per hour. The interior uses stonewash denim upholstery and packs a twin-deck cassette player. Skoda Dog Umbrella People love dogs, and owners know that a wet canine can be a mess. Skoda is ready to tackle this problem with an umbrella for your mutt. Made from unobtainium, the gadget hides in the door when not in use, but when raindrops start falling, people can keep their pup dry. Skoda Snowman Skoda's Facebook page also teases us with a very cool vehicle. The Snowman is a 396-horsepower plug-in hybrid snow machine. With its tracks, the company's newest model would never have to worry about getting stuck in the winter. Opel Adam C Sure, electricity and hydrogen are cleaner forms of fuel than gasoline or diesel, but Opel has a way to make your car even more environmentally friendly – muscle power. Wind up the crank at the rear for 15 minutes, and the Opel Adam C is good for 125 miles. GM's European division also claims that owners get a great workout because a full winding session burns 400 calories. You wouldn't feel guilty about picking up that pizza after cranking up this hatchback.

2015 Mazda2 revealed ahead of Paris debut [w/videos]

Small cars may be big business, but the world's automakers don't seem to be in any particular rush to keep them fresh. The new Smart Fortwo unveiled yesterday replaces a model that's already been around for seven years, and based on a structure dating back to the late '90s. The new Opel Corsa revealed just last week replaces a model that had been around for eight years. And the Mazda2 has been on the market in its current form for seven years now, but not for much longer because Mazda has finally revealed its successor.
Set to be unveiled at the Paris Motor Show this October, the new Mazda2 follows the stylistic lead of the Hazumi concept remarkably close, from the sharply creased front end right down to the wheel design - bringing the supermini hatchback in line with the KODO design language that characterizes its bigger siblings: the Mazda3, Mazda6 and CX-5.
Although details released thus far are rather limited, and power will vary from one market to another, engine options center around a 1.5-liter four in both gasoline and diesel versions, joining the manual and automatic transmissions and the chassis itself under Mazda's Skyactiv technology umbrella. We wouldn't expect the diesel version to make it across the Pacific (or across the border from the plant that will build it alongside a new Toyota hatch in Mexico), but rumors have surfaced of a potential rotary hybrid. The new 2 will also include the company's MZD connectivity suite and i-Activsense safety technology.