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240 Landmarks TopTransmission and Drive Train > In-house CVT metal belt
 In-house CVT metal belt
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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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Honda developed critical metal belt technology for a CVT, and mass produced it, a first for a car manufacturer.
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Storage location:HONDA MOTOR CO., LTD.
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Year manufactured:2001
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Manufacturer:Honda Engineering
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Classification:-
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Current status:-
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Name / Manufacture
Model name:-
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Company name:Honda Motor Co., Ltd.
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Applied model:2002 Honda Fit
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Year of manufacture:2001
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Application year:2001
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Specification
Shift / operation method:Belt CVT
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Transmission type:(Belt CVT)
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Speeds:CVT
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Gear ratio (forward):2.367-0.407
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Operation method:-
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Potency
Structure, type, measure, means, etc.:CVT metal belt
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Features:Metal belts are a core CVT technology, and were mass produced only by Van Doorne Transmissie b.v. Honda used new mechanical analysis on the loosening side and a new inclusion evaluation method in combination with numerical analysis based on its knowledge of transmission mechanisms accumulated over many years. This enabled Honda to succeed in becoming the world's first auto manufacturer to develop these metal belts in-house. One feature of the developed metal belts was the achievement of both a small minimum diameter for the winding around the pulley and high strength to reduce the size of the CVT and expand its ratio range. The small minimum diameter was realized by shortening the length of the element V surface. High strength was achieved as follows: ring stress was reduced by shortening the length of the element V surface; a method to evaluate the effects of ring inclusions on strength was developed combining an ultrasound fatigue test, a dissolution method, and extreme statistics analysis; and materials free from contamination were developed.
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Reference materials:Honda R&D Technical Review Vol. 14, No.1
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