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Inside Mazda’s New Two-Turbo, Four-Cylinder Diesel Engine

40-mpg Daily Driver Coming For 2014

Text By Jason Thompson, Photography by Jason Thompson, Mazda

When we first discovered Mazda was bringing its two-stage turbocharged diesel to North America, we celebrated. We think you’re going to, too. According to Mazda, sometime in 2014 you’ll be able to buy a Mazda6 (family sedan), which gets more than 40 mpg on the highway. Furthermore, it’ll require no expensive NOx aftertreatment and no urea—as it breezes past strict Tier 2 Bin5 emissions tests. Mazda is so confident in the engine’s ability to meet these strict emissions requirements, it’s even going to offer the Mazda6 with a manual transmission.

Skyactiv-D: Philosophy and Technology
Some in the auto industry would like you to think the internal combustion engines we have today are about the best we can do in terms of efficiency, emissions, and fuel economy. Some want to throw all these engines away in favor of expensive, non-renewable battery systems that still lack an infrastructure. Mazda’s Skyactiv-D (the D stands for diesel) philosophy bucks this trend and takes the opposite approach by finding improvements in all areas of the modern automobile.

The Mazda suite of Skyactiv-D technologies includes a lighter and stronger body construction, suspension geometry improvements, efficient transmissions, and, of course, cleaner and stronger diesel power. By putting all this together in one vehicle, the consumer benefits. We get a reasonably priced vehicle that’s a blast to drive, our pocketbook doesn’t get too skinny, and our cars help keep the sky clear and healthy for future generations.

Vehicle Specifications
Model: ’14 Mazda6
Engine: 2.0L Skyactiv-D
Type: All-aluminum inline four-cylinder with chaindriven camshafts and an internal balance shaft
Bore: 3.38 inches
Stroke: 3.7 inches
Compression ratio: 14:1
Weight: 308 pounds (with accessories)
Fuel injection: Common-rail with piezo injectors
Fuel requirement: Diesel, B5
Valvetrain: 16-valve dual overhead cam
Horsepower: 170 hp
Torque: 310 lb-ft
Aftertreatment: Engine-mounted diesel oxidation catalyst (DOC) and diesel particulate filter (DPF)
Transmission: Skyactiv-MT six-speed manual and Skyactiv-Drive six-speed automatic
Fuel economy: 20 percent improvement as compared to Mazda’s current 2.2L diesel
Steering: Electric power assist steering (EPAS)

How Lighter Parts Improve Power and Save Fuel

SOURCES
Mazda North American
www.mazda.com
By Jason Thompson
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