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Development of a New Power Train for the Civic Hybrid

Article of Honda R&D Technical Review Vol.14 No.1


The Civic Hybrid was developed as a compact passenger hybrid car that achieves both low fuel consumption and cleaner operation from the viewpoints of preserving the global environment and conserving resources. The engine has lean-burn countermeasures added to the base i-DSI 4-cylinder 1.3-liter SOHC 2-ignition plugs/cylinder engine mounted in the “Fit”. In addition, the cylinder idling system has been adopted to increase the regenerated energy during deceleration. The hybrid system is based on the Honda IMA system, and the maximum regenerative torque has been increased by approximately 30% by improving the magnetic circuits of an ultra-thin DC brushless motor and adopting a new rotor manufacturing method. Fuel economy is improved by a new hybrid power train incorporating a CVT that further improves transmission efficiency, thus achieving the low fuel consumption of 29.5 km/l in the 10-15 mode. New emission technologies applied are a new exhaust system with a NOx adsorption reduction type three way catalyst and air-fuel ratio control achieved 75% reduction from the 2000 emission standards in Japan. The power control unit, which is the IMA system control unit, was downsized and located behind the rear seat, thus ensuring comparable trunk capacity to the base vehicle of the Civic Ferio.


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Author (organization or company)

Masato MATSUKI(Tochigi R&D Center)、Teruo WAKASHIRO(Tochigi R&D Center)、Toshihiro KAMIYAMA(Tochigi R&D Center)、Toshiyuki SATO(Tochigi R&D Center)、Toshiaki KAKU(Tochigi R&D Center)、Masahiro KANDA(Tochigi R&D Center)

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