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Development of Inverter Generator Equipped with Fuel Injection Engine

Article of Honda R&D Technical Review Vol.27 No.1

Summary

The EU6500is generator, which has an established reputation for realizing the world’s top level of compactness and quietness in the 5.5 kVA class, has been employed as the base model in the development of the EU7000is, further increasing the value of the unit as a home back-up generator.
The use of a fuel-injection system able to optimally control engine air-fuel ratio irrespective of external factors has increased fuel efficiency by 22% against the existing model.
The integration of the injector and the throttle body has made it possible to employ the developed generator fuel-injection system while maintaining compactness, and the mounting of the atmospheric pressure and intake air temperature sensors on the circuit board of the generator control unit and the removal or simplification of various other sensors have helped to enable the use of the fuel-injection system with minimal cost increase.
The use of the fuel-injection system has enabled continuous operation of the unit for up to 12 hours without refueling. Modification of the power supply circuit and reduction of the minimum operating voltage of the generator control unit allow starting of the unit using a battery-less recoil starter. The realization of increased inverter efficiency and the optimization of ignition timing have increased maximum output from 6,500 VA to 7,000 VA. This has made it possible to respond to the motor load represented by air conditioners and other pieces of equipment that draw large amounts of power at startup, expanding the range of applications of the unit as a generator.

Reference

(1) Tanaka, Y., Onodera, T., Okabe, K., Ito, T.: Low Noise and Lightweight Technology of Inverter Generator EU6500is, Honda R&D Technical Review, Vol. 19, No. 2, p. 37-44
(2) Akamatsu, S., Ueda, M., Hayashi, A., Ouchi, K.: Development of Integrated Fuel Injection System for Small Sized Motorcycles, Honda R&D Technical Review, Vol. 17, No. 2, p. 1-7

Author (organization or company)

Shigeru SAITO(Power Products R&D Center)、Taiyo ONODERA(Power Products R&D Center)、Takashi HASHIZUME(Power Products R&D Center)、Takeshi FUKAWA(Power Products R&D Center)

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