2004 Mazda 3 S Hatchback 4-door 2.3l on 2040-cars

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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.

Trump declaration they're a security threat stuns Japanese automakers

TOKYO — Japan's automakers' lobby said on Tuesday it was dismayed by President Donald Trump's declaration that some imported vehicles and parts posed a threat to U.S. national security, as the industry braces for a possible rise in U.S. tariffs. Trump made the unprecedented designation of foreign vehicles on Friday but delayed for up to six months a decision on whether to impose tariffs to allow for more time for trade talks with Japan and the European Union. "We are dismayed to hear a message suggesting that our long-time contributions of investment and employment in the United States are not welcomed," said Akio Toyoda, chairman of the Japan Automobile Manufacturers Association. "As chairman, I am deeply saddened by this decision," Toyoda, president of Toyota, said in a statement. Trump has threatened to impose tariffs of up to 25% on imported cars made by foreign automakers, a move which automakers have argued would ramp up car prices, curb the global competitiveness of U.S.-made vehicles and limit investment in the country, the world's No. 2 auto market. The United States is a vital market for Toyota, Nissan, Honda and other Japanese car makers. Autos and components are among the Asian country's biggest export products. Most of Japan's major automakers operate plants in the United States. The Japan Automobile Manufacturers Association notes that its automakers build about 4 million vehicles a year in North America, or 75 percent of what it sells here. Many are built for export, helping lessen the U.S. trade deficit Trump is concerned about. Major automakers have announced a slew of investments in the United States since Trump took office in January 2017 and put pressure on the industry to create more U.S. jobs. For its part, Toyota has pledged to invest almost $13 billion in the United States between 2017 and 2021 to boost manufacturing capacity and jobs. This includes $1.6 billion for a vehicle assembly plant in Alabama jointly run with Mazda. Government/Legal Honda Mazda Mitsubishi Nissan Toyota Trump

2016 Mazda CX-9 First Drive

Automotive enthusiasts tend to obsess over spec sheets. How else could we know which cars and trucks are the quickest in a straight line, hold the road with the greatest tenacity, or tow the biggest trailers? More succinctly, what ammunition would we have in the seemingly endless back-and-forth of Internet forums if it weren't for specifications? Mazda's engineers think they've found a better way. The 2016 CX-9 has less horsepower than its primary competitors. The only engine available is a turbocharged four-cylinder, hooked to a six-speed automatic. Drivers won't miss the 23 horsepower (or more, as we'll soon explain) lost in the changeover from 2015 to 2016, because Mazda applied its holistic Skyactiv approach to the largest vehicle it offers. That means less weight and, ultimately, more fun. Or so they say. Are they right? Yes. And no. Most of the time, in normal on-road driving conditions, the 2016 CX-9 is the most fun you can have with three rows. But the real-world tradeoff didn't go off completely without a hitch. Reasoning that real-world performance is more important than ultimate horsepower, Mazda specified a four-cylinder for its big, three-row SUV instead of a more traditional V6. Let's get those all-important specifications out of the way: All 2016 Mazda CX-9s are fitted with a 2.5-liter turbocharged four-cylinder with 250 horsepower and, impressively, 310 pound-feet of torque at just 2,000 rpm. Unless you decide to use 87 octane, in which case you'll be limited to 227 horsepower. Mazda doesn't think owners will actually notice the difference in power levels, so there's no Premium Fuel Recommended sticker on the back of the fuel door. Mazda utilized some clever turbo trickery to deliver a diesel-like torque curve from its gasoline-fueled engine, which makes the small-displacement powerplant feel lively at low engine speeds. The flipside is that the CX-9 runs out of breath as the needle swings across the upper reaches of the tach. While that simply wouldn't do for a sportscar like the MX-5, in the CX-9 it's not necessarily a deal breaker. One benefit to the downsized engine is that it doesn't guzzle fuel. The EPA rates the CX-9 at 22 miles per gallon in the city and 28 on the highway. Drop one mpg all around for the all-wheel-drive model. Those figures beat out all the CX-9's most natural competitors, including the Honda Pilot and Toyota Highlander. The turbo-four Ford Explorer matches the 28-mpg highway figure, but loses by three in the city.