Saturday, 15 October 2011

Nissan Motor Co CVT


The Japanese automobile major Nissan Motor Co has unveiled a new generation CVT (continuously variable transmission) for 2.0 to 3.5-liter engines used in front wheel drive vehicles. According to a report in Autonewswire, Nissan has mated its Xtronic CVT with a new  engines , both of which are said to be based on newly developed environmental technologies that improve fuel economy and environmental performance of internal-combustion engines.
It was reported that the new CVT is said to have leading ratio coverage of 7.0, with friction reduced by up to 40 percent. Combined with Nissan's Adaptive Shift Control - a feature that adapts shifting patterns to match each driver's style and the road - the CVT delivers responsive and powerful acceleration. The two also prevent the engine from revving too fast at high speeds and help minimize noise. The report mentioned that Nissan said it has combined smaller shaft diameter pulleys with a new and differently shaped belt with the range of ratios between the two pulleys being expanded with only a minimally increased axial distance. The resulting ratio coverage of 7.0 is said to set a new benchmark for CVTs for 2.0-liter plus vehicles around the world.
According to the report, Nissan said it has also designed an innovative package for the CVT by incorporating one electric motor and two clutches and combines this with a compact lithium-ion battery and a 2.5-liter supercharged engine. Nissan claimed that the result is a compact, versatile powertrain that is affordable, doesn't require a specially designed body, and offers improved city and highway fuel economy. Nissan said the engine will appear first on vehicles sold in North America in 2012 and then globally afterwards, according to the report.

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