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- - New Mazda RX Vision concept (https://www.ft86club.com/forums/showthread.php?t=97304)

Mazda files patents for a sequential twin-turbo setup

https://o.aolcdn.com/images/dims3/GL...2.21.25+PM.jpg

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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.

https://o.aolcdn.com/images/dims?cro...13e68681627027

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. And of course, the system could still have the throttle response and power benefits of a more conventional sequential turbocharger setup, depending on how it's optimized.

We do have several unanswered questions. For instance, why would Mazda look into a twin-turbo system when variable-geometry and twin-scroll turbochargers can provide similar results? They also each only use a single turbocharger, which could hypothetically be lighter and cheaper than two. Perhaps the two turbos can provide more effective boost over a greater rpm range. Also, what would this engine go in? We would love to see it power a new high-performance Mazda3, but maybe it would be used for a largr luxury sedan based on the Vision Coupe. Only time will tell. We'll be watching this development closely.

https://www.autoblog.com/2017/12/08/...n-turbo-setup/

MAZDA RX-VISION GT3 CONCEPT

https://www.youtube.com/watch?time_c...ture=emb_title

:slap: Damn it Mazda, please put out an actual product.

It's the race version of their vision concept car.

https://www.autocar.co.uk/sites/auto...?itok=_HjiYt-9

Perfect modern sports car for me would be a de-caricaturized RX-Vision with a ~300hp 2.5 liter n.a. V4...

Mine's longer...

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Originally Posted by chaoskaze (Post 3333639)

:slap: Damn it Mazda, please put out an actual product.

Looks pretty sweet, but what is it with the freaking Grand Turismo video? I miss that Furai so much... give us something a bit more palpable.

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Originally Posted by sato (Post 3334168)

Looks pretty sweet, but what is it with the freaking Grand Turismo video? I miss that Furai so much... give us something a bit more palpable.

Gran Turismo has a tie-in program (since GT6) in which they task auto manufacturers that are in their game to create GT concept cars. GT-Vision. This is one of them.

Scroll on to see other's GT concepts. https://www.gran-turismo.com/us/vgt/

Hasn't Mazda been teasing this concept for years now and hasn't the reaction always been positive? What's the point of releasing this GT3 version if they're not serious about building this thing.

Forget the RX-Vision concept, I'd be happy if they just produced a Miata coupe for once.

The GT3 of the RX-Vision was first shown in concept last November. The main issue with the concept is sadly how to incorporate the rotary. Mazda has tried to re-engineer the engine and even has received patents for them. The first concept was an inverted engine design with the exhaust coming out the top. The 2nd form was a hybrid design using the rotary mostly as a range extender, though in the RX-vision it could also be used for performance experience.

Keep in mind Mazda has not been doing well for a while now, even before Covid19.

The redesigned Mazda 3, while receiving a strong, positive reception has not sold well at all. Despite a slick redesign, premium interior and offering AWD punching well above it's class it has flopped. This might have caused Mazda to pull out on some of their development/risks, even before 2020 went to shit.

Mazda was starting to unmask the details on it's Skyactive-X, an inline 6 that was going to debut starting in the redesigned Mazda 6. Most feel this is big for the brand as the inline 4 na Skyactiv and turbo Skyactiv just isn't very appealing against the competition in today's market. Mazda was also said to be returning to offering more FR layout in more cars.

Mazda currently also doesn't have an electric or hybrid model to offer. The 2021 CX-5 is/was supposed to debut that as an option but, it has also went dark.

With most auto manufacturers cutting down on their small car lineup and doubling down on cross-overs, things aren't looking up for the Mazda 3/6 in general.

Personally, I'd jump at an AWD Mazda 3 hatchback for a daily if they gave it a stronger engine. Tack on a 6-speed, decent brakes and and the old MazdaSpeed branding and it might even grab some of the WRX crowd.:cheers:

Am I reading this right? Win RX-Vision GT3...

Mazda has launched its newest rotary sports car, but don’t go rushing to your nearest dealership with a cash deposit just yet.

https://carsguide-res.cloudinary.com...%20%281%29.jpg

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Two special events – a time trail challenge and livery design contest – will also be held in-game to coincide with the release of the RX-Vision GT3 Concept and Mazda’s 100th birthday this year, with winners to receive a limited-edition sketch and miniature car.

Just noticed the word MINIATURE... sigh. Oh well it's still kind of cool to win something in real life for playing a game anyway.

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this is the GT3 version of the same concept that was shown back in 2015

https://insidemazda.mazdausa.com/maz...s-car-concept/

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Originally Posted by mav1178 (Post 3334811)

this is the GT3 version of the same concept that was shown back in 2015

https://insidemazda.mazdausa.com/maz...s-car-concept/

Sure looks similar!

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Mazda Patents RWD, Rotary with Hybrid Tech

Tri rotor hybrid? Neat!

Not sure they needed a patent on this ;)

Seriously though, looks intriguing!