12 Mazda 5 Automatic Bluetooth Sirius Auxiliary Input 17 on 2040-cars

Auto blog

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.

Leaked images show digital gauge cluster for Mazda3

Most everything divulged about the 2019 Mazda3 so far has focused on the trick Spark Controlled Compression Ignition (SPCCI) Skyactiv-X engine. If a series of photos posted on a Chinese website are accurate, it looks like Mazda has novel plans for the cockpit as well. The three images show a three-color, all-digital gauge cluster in two different configurations. The first configuration places a three-digit speedo in the center of a blue-ringed tachometer, with gear indicator and water temp displays on the left, fuel range calculator and what appears to be a funky clock on the right. The second configuration splits the tachometer to the left and the speedo to the right. In between them is what looks like a road surface display for automatic cruise control. Trip info lies just under the blue-banded road, while water temp, fuel gauge, gear indicator and range info line up across the bottom. A swath of empty space on the left could be where Mazda's relocated the current car's passel of warning signals. Of note: Everything around the digital gauges appears to come straight from the current Mazda3. The instrument panel surround, the steering wheel and buttons, the stalks, all of it is lifted from today's car. If the photos are what's headed our way on some trim of the 2019 Mazda3, though, they show a clean, handsome evolution of the no-nonsense cluster in the current compact hatch. Mazda's worked up a head of good press on the run-up to the Mazda3 launch for both the engine and the dynamics. We're told we'll get between 10 and 30 percent more torque from the 2.0-liter SPCCI Skyactiv-X, and about 25 percent better fuel economy compared to today's 2.0-liter Skyactiv-G. Handling-wise, the jinba ittai philosophy — horse and rider as one — has led to engineers reworking everything from tire sidewall stiffness to multi-contoured torsion elements and the mounting and shape of the seats. The hatchback's torsional stiffness climbs by 30 percent, any excess rigidity countered by 7.5 meters of "matrix resin material" applied in 16 places on the body "to absorb vibration and dissipate it as heat." The point has been to eliminate dynamic static between the driver and the road, and then to give the driver the best natural seating position to take advantage of the body's reflexes to dynamic input. At the same time, this digital gauge cluster might also give that driver something tasty to look at. Related Video:

100k Mazda6 sedans recalled over tire-monitoring systems

A tire pressure monitoring system (TPMS) is, as you might have guessed, designed to monitor the air pressure in the tires, and alert the driver if pressure drops. But a problem found in the Mazda6 could keep the system from doing its job. According to the recall notice issued by the National Highway Traffic Safety Administration, the TPMS in the Mazda6 might not recognize a loss in tire pressure if all the tires slowly deflate at the same time. Under-inflated tires, it goes without saying, could increase the risk of a crash. As a result, Mazda is recalling 99,711 examples of the 2014-2015 Mazda6 to have the system's software updated. RECALL Subject : Tire Pressure Monitoring System/FMVSS 138 Report Receipt Date: OCT 27, 2014 NHTSA Campaign Number: 14V675000 Component(s): TIRES Potential Number of Units Affected: 99,711 Manufacturer: Mazda North American Operations SUMMARY: Mazda North American Operations (Mazda) is recalling certain model year 2014-2015 Mazda6 vehicles manufactured October 25, 2012, to October 10, 2014. If the pressures of four of the tires on an affected vehicle gradually drop at the same time, the tire pressure monitoring system (TPMS) may not warn the driver of the drop in pressure. As such, these vehicles fail to comply with the requirements of the Federal Motor Vehicle Safety Standard (FMVSS) No. 138, "Tire Pressure Monitoring System." CONSEQUENCE: A vehicle that is driven with under inflated tires may experience a sudden tire failure, increasing the risk of a crash. REMEDY: Mazda will notify owners, and dealers will update the TPMS software, free of charge. The recall is expected to begin on December 10, 2014. Owners may contact Mazda customer service at 1-800-222-5500. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.