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240 Landmarks TopTransmission and Drive Train > Extroid CVT
 Extroid CVT
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CVTs released in 1987 featured smooth acceleration and improved fuel efficiency. From the late 1990s, various advances were made. As a result, CVTs were applied to various models (2-liter front engine front wheel drive vehicles), toroidal CVTs (large displacement front engine rear wheel drive vehicles) were put into practical use, and improvements were made that allowed CVTs to be applied to large displacement engines (3.5-liter front engine front wheel drive vehicles). In addition, crucial metal belts began to be manufactured in-house.
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Nissan’s “Extroid” CVT was different from conventional belt CVTs. It transmitted power using discs and power rollers, and was installed for the first time in the world in commercial vehicles. The Extroid CVT was the culmination of Nissan's CVT technology. It allowed quick response, and smooth and powerful acceleration suitable for luxury cars, and it was also capable of handling the large torque from a 3-liter turbo charged engine. Moreover, it improved fuel efficiency by about 10% compared with a conventional automatic transmission.
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Storage location:NISSAN MOTOR CO., LTD.
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Year manufactured:1999
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Manufacturer:Nissan Motor Co., Ltd., Jatco
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Current status:-
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Name / Manufacture
Company name:Nissan Motor Co., Ltd.
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Applied model:Nissan Cedric (Y34), Skyline
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Year of manufacture:1999
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Application year:1999
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Specification
Shift / operation method:Automatic
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Transmission type:Disc and power roller
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Speeds:6-forward-speed manual mode CVT, 1 reverse speed
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Gear ratio (forward):D, DS ranges: 2.857 to 0.660
Manual mode: 2.857 (1st speed), 2.005 (2nd speed), 1.534 (3rd speed), 1.177 (4th speed), 0.900 (5th speed), 0.660 (6th speed)
Final reduction gear ratio: 3.692
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Gear ratio (reverse):1.957
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Operation method:Shift lever type
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Potency
Structure, type, measure, means, etc.:The Extroid CVT transferred driving force and changed speeds by transmitting the rotation of an input disc that receives power from the engine to a power roller, and then transmitting the power from the power roller to an output disc (the double cavity method). By continuously changing the angle of the power roller, the rotation speeds of the input/output discs are changed to enable smooth changes in speed.
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Effect:Quick response, smooth speed changes, and improved fuel efficiency
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Points of interest, topicality:・2000 Ichimura Industry Award
・2000 JSAE Technological Development Award
・2000 JSME Award
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