Frankfurt Preview: Mazda CX-7 to debut new diesel SCR system

Mazda will be showing off the newly refreshed CX-7 with the latest MZR-CD 2.2-liter diesel next month at the Frankfurt Motor Show. This will be the first Japanese brand diesel to feature an selective catalytic reduction system. Like other SCR systems, this one uses urea injection to convert NOx emissions to nitrogen and water. The AdBlue (aqueous urea solution) is stored in a tank under the rear cargo area and injected into the exhaust stream ahead of the catalytic converter.

The urea tank is sized to support service intervals of about 12,000 miles so the drive shouldn't run out of urea before regular service intervals. The CX-7 will conform to EURO-V emissions standards Unfortunately, the diesel will only be offered in the European market.

[Source: Mazda]

Mazda to Exhibit first Japanese Car with SCR System at Frankfurt Motor Show

Leverkusen, 12 August 2009. The Mazda stand at next month's Frankfurt Motor Show (IAA) will exhibit the first Japanese passenger car to have a diesel engine mated to a Selective Catalytic Reduction (SCR) system. This technology will be offered exclusively to European customers in the new diesel facelift version of the CX-7, Mazda's sports crossover SUV, which will go on sale in October this year.

Under the bonnet of Mazda's flagship SUV, the clean-running and highly efficient MZR-CD 2.2-liter turbo diesel engine with SCR will offer customers outstanding eco-friendly performance. Mazda CX-7 facelift complies with Euro Stage V emissions regulations, despite being a roomy SUV.

The SCR system purifies vehicle exhaust gases by spraying AdBlue® aqueous urea from a storage tank – fitted under the luggage area – directly into the exhaust flow in front of the catalytic converter. This causes a natural chemical reaction in which the AdBlue® converts approximately 40 percent of the NOx into harmless nitrogen.

Thanks to the compact design of the SCR system the CX-7 Diesel delivers the same 455 litres of luggage space (VDA) as the gasoline engine version, and it is user-friendly. By minimizing consumption of AdBlue® to make sure it lasts for at least 20,000 km under normal driving conditions, refills are required only at each scheduled maintenance.

Joining the new clean-running CX-7 facelift diesel in Frankfurt will be a host of other environmental technologies currently making Mazda's European line-up greener than ever before – including Mazda's fuel-saving i-stop system, and rotary hydrogen powertrain technology, among others.

Mazda's press conference will be held in Hall 3.1, Stand A7, on 15 September, at 12:45 local time.