Martyn
9th March 2009, 12:01 AM
Already a world leader in advanced diesel engine technology, Fiat Group has just launched MultiAir, a fundamental breakthrough in petrol engine design that will dramatically cut fuel consumption, as well as significantly boosting power and torque, cutting carbon dioxide emissions by between 10 and 25 per cent, and up to a 60 per cent reduction in other engine pollutants.
With two generations of common rail direct injection diesel engine technology, UniJet and MultiJet, to its credit, Fiat has dramatically improved diesel engine performance, economy and emissions. Now, with MultiAir, Fiat has brought together the company’s enviable expertise and technology to make one of the single largest leaps forward for petrol engine design in recent times.
MultiAir Technology benefits:
Maximum power is increased by up to 10 per cent thanks to the adoption of a power-orientated mechanical camshaft profile.
Low RPM torque is improved by up to 15 per cent through early intake valve closing strategies that maximise the air mass trapped in the cylinders.
Elimination of pumping losses brings a 10 per cent reduction in fuel consumption and CO2 emissions, both in naturally aspirated and turbocharged engines with the same displacement.
MultiAir turbocharged and downsized engines can achieve up to 25 per cent fuel economy improvement over conventional naturally aspirated engines with the same level of performance.
Optimum valve control strategies during engine warm-up and internal exhaust gas recirculation, realised by reopening the intake valves during the exhaust stroke, result in emissions reductions ranging from 40 per cent for unburnt hydrocarbons and carbon monoxide (HC/CO), and up to a 60 per cent cut in oxides of nitrogen, (NOx).
Constant upstream air pressure, atmospheric for naturally aspirated and higher for turbocharged engines, together with extremely fast air mass control, cylinder-by-cylinder and stroke-by-stroke, result in a superior dynamic engine response, and enhanced driving pleasure.
MultiAir is applicable to all internal combustion engines, regardless of the fuel used.
It can be adapted for diesel engines to reduce their NOx emissions and make particulate filters significantly more effective.
The first new engine to be equipped with MultiAir will be the 16-valve 1.4 litre family of naturally aspirated and turbocharged engines, and the first car to go on sale with MultiAir installed will be the Alfa MiTo at the end of 2009. Its second application will be as an integral part of a new two cylinder engine family.
With two generations of common rail direct injection diesel engine technology, UniJet and MultiJet, to its credit, Fiat has dramatically improved diesel engine performance, economy and emissions. Now, with MultiAir, Fiat has brought together the company’s enviable expertise and technology to make one of the single largest leaps forward for petrol engine design in recent times.
MultiAir Technology benefits:
Maximum power is increased by up to 10 per cent thanks to the adoption of a power-orientated mechanical camshaft profile.
Low RPM torque is improved by up to 15 per cent through early intake valve closing strategies that maximise the air mass trapped in the cylinders.
Elimination of pumping losses brings a 10 per cent reduction in fuel consumption and CO2 emissions, both in naturally aspirated and turbocharged engines with the same displacement.
MultiAir turbocharged and downsized engines can achieve up to 25 per cent fuel economy improvement over conventional naturally aspirated engines with the same level of performance.
Optimum valve control strategies during engine warm-up and internal exhaust gas recirculation, realised by reopening the intake valves during the exhaust stroke, result in emissions reductions ranging from 40 per cent for unburnt hydrocarbons and carbon monoxide (HC/CO), and up to a 60 per cent cut in oxides of nitrogen, (NOx).
Constant upstream air pressure, atmospheric for naturally aspirated and higher for turbocharged engines, together with extremely fast air mass control, cylinder-by-cylinder and stroke-by-stroke, result in a superior dynamic engine response, and enhanced driving pleasure.
MultiAir is applicable to all internal combustion engines, regardless of the fuel used.
It can be adapted for diesel engines to reduce their NOx emissions and make particulate filters significantly more effective.
The first new engine to be equipped with MultiAir will be the 16-valve 1.4 litre family of naturally aspirated and turbocharged engines, and the first car to go on sale with MultiAir installed will be the Alfa MiTo at the end of 2009. Its second application will be as an integral part of a new two cylinder engine family.