At the Paris Motor Show next month, Mazda will be showing off its new 2.2L MZR-CD clean diesel engine that will be installed in the Mazda 6. The new engine is rated at 182 hp and yields 42 mpg (U.S.). One of the interesting elements of the new engine is a Mazda-developed diesel particulate filter (DPF). The combination of modern common rail injection systems and particulate filters are the technology that has allowed new diesels to be almost soot free. Typical DPFs contain a porous ceramic core that captures the particles. Periodically, the filter has to be regenerated to clear the particles. This is done by injecting more fuel into the engine and raising the exhaust temperature to a point that will burn off the particles. This process that typically occurs about every 500 miles and increases the fuel consumption somewhat.

The Mazda DPF has a new molecular structure for the core that allows oxygen to pass through more easily, getting it into contact with the particulates. As a result the regeneration process is more effective. They claim that the interval between regenerations is doubled and time for each regeneration is cut by two-thirds. The new diesel will go on sale in Europe in 2009.

[Source: Mazda]

Press release

Mazda announces latest Technology Developments

• New innovations that will realise Mazda's 'Sustainable Zoom-Zoom' strategy
• Lower fuel consumption using the Mazda Smart Idle Stop System (SISS)
• Clean, new-generation 2.2-litre turbo diesel that is quiet and powerful
• Mazda's Lightweight Strategy benefits from new plastic moulding technology

Leverkusen, 9th September 2008. Mazda Motor Corporation recently announced a commitment to reduce the fuel economy of Mazda vehicles sold globally by an average of 30 per cent by 2015 as part of its overall Sustainable Zoom-Zoom strategy. As part of this strategic direction Mazda now presents three all-new technological developments near completion in Japan.

Up to 9 Percent improvement in Fuel Consumption – the Mazda Smart Idle Stop
System (SISS)
The Mazda SISS automatically stops the engine of the car, then automatically starts it again using direct-injection helped by a starter motor action. In order to achieve this, both the compression-stroke and expansion-stroke pistons are stopped at exactly the correct position to ensure the right balance of air volume in each cylinder. Mazda's system is unique, and a global first, as it begins indexing the pistons before the engine starts up again, unlike standard systems that do this after an electric motor starts turning over the engine. Because of this innovation, Mazda's SISS starts about twice as fast as competitor systems, and delivers a smoother restart and fuel savings. The SISS system will be introduced to the EU market in the first half of next year.

Cleaner MZR-CD 2.2-litre Turbo Diesel with more Power and Torque
A central product of the 'Sustainable Zoom-Zoom' strategy will be introduced in Europe early next year. With its new-generation 2.2-litre common-rail turbo diesel, Mazda launches a clean, fuel-efficient and powerful engine. 185 PS of power and 400 Nm of torque make it one of segment's liveliest diesels. To enhance overall fuel efficiency, the engine employs innovative new technologies including ultra high pressure fuel injectors and a lower compression ratio. In addition, the Mazda-developed diesel particulate filter has a catalyst activation mechanism that removes particulate matter from the exhaust gases more efficiently. The ceramic base material in Mazda's unique catalyst is a world first, and has a molecular structure that increases the rate of particulate matter combustion and enhances
the DPF regeneration speed.

Innovative Plastic Moulding Technology – reduces consumption of plastic resins by
20 to 30 percent and also vehicle plastics weight Mazda's lightweight strategy is now taken even further with a new plastic moulding technology that reduces the weight of plastic parts in Mazda vehicles without compromising
strength or rigidity. The moulding manufacturing technique not only reduces weight, but also cuts the consumption of oil-based resins used as raw materials by approximately 20 to 30 percent, with associated cuts in the volume of CO2 emissions. This plastic moulding technology can potentially be applied to nearly all plastic parts used in vehicles.

This new technology builds on Mazda's renowned lightweight strategy that has resulted in the new Mazda2 and Mazda6 being lighter and more fuel-efficient than their predecessors in contrast to an industry trend towards ever-larger and heavier cars.

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