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Study of Small-sized Scooter Hybrid Vehicle

Article of Honda R&D Technical Review Vol.18 No.2


In the application of hybrid technology to motorcycles, some issues including limited space for mounting a hybrid system and small regenerative energy available during deceleration are present. In order to get the maximum effect of improving fuel economy by solving these issues, we have developed a series-parallel hybrid system. This system uses a direct rear wheel driving motor that can absorb the regeneration energy during deceleration more efficiently. Additionally an idle stopping system by use of a starter AC generator, an electronically controlled fuel injection system, and an electronically controlled belt CVT (continuously variable transmission) system were adopted. Utilizing this small-sized hybrid system the experimental scooter of 50 cm3 displacement achieved an equivalent body size as the mass produced scooter with 50 cm3 engine. Furthermore, this equivalent body size was achieved while keeping a utility space under the seat. Moreover, an improvement of 60 % in fuel economy under ECE 40 mode was realized.


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(2) Hasegawa, Y., Aoyagi, S., Yonekura, T., Abe, H.: Energy Efficiency Improvement of Series Hybrid Vehicle, HONDA R&D Technical Review, Vol. 12, No. 1, p. 79-84
(3) Ogihara, H.: Technology for Applying Solid Lubricant to the Piston Skirt of Internal Combustion Engine and Its Effects, Honda R&D Technical Review, Vol. 14, No. 1, p. 85-92

Author (organization or company)

Hiroyuki KOJIMA(Motorcycle R&D Center)、Takashi OZEKI(Motorcycle R&D Center)、Noriaki OKANO(Motorcycle R&D Center)、Yoshiaki TSUKADA (Motorcycle R&D Center)

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