The Multiair technology will go into production during 2009 on the 1.4-litre 16-valve FIRE gasoline engine and the new 900 cc two-cylinder SI engine in the Small Gasoline Engine (SGE) family.
The technology was applied to the cylinder head of the 2.0-litre B Family diesel engine to test the potential of the system’s fast, flexible and precise air metering and internal EGR exhaust gas recirculation. An Alfa 159 demo vehicle showed that the system produces significant benefits for oxides of nitrogen emissions.
Further benefits include higher low-end torque, smoother cold weather operation, more even torque delivery, and no engine shake at shut-off. The additional cost of installing the system on a diesel engine is largely offset by the fact that all external HP-EGR high-pressure exhaust gas recirculation components and the throttle valve can be eliminated, while a lower noble metal content is required in the catalytic converter.