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Governor System for General Purpose Engine Using Adaptive Control Theory

Article of Honda R&D Technical Review Vol.17 No.2

Summary

General purpose engines are required to keep the engine speed constant, and are therefore equipped with governor mechanisms. However, the engines are applied to various applications, and the dynamic characteristics of the controlled engine changes according to different operating conditions. So it is necessary for a conventional mechanical governor to change the spring rate and tune the idle speed; similarly, gains must be tuned in electronic governors using PID control. To enhance robustness, an adaptive control system that uses a self-tuning regulator has been constructed. Applying elliptical gears to the mechanism for driving the throttle valve, it was possible to realize both high resolution near the closed position and a reduction in operating time of the throttle valve.

Reference

(1) Gomi, T.: Nainen Kikan, p.214-215 (1985) (in Japanese)
(2) Terao, M., Kanai, K.: Robust Adaptive Control, p. 109-113 (1993)
(3) Omatsu, S., Yamamoto, T.: Self Tuning Control, p. 3-4 (1996)
(4) Adachi, S.: Seigyo no tameno System Dotei, p. 55-64 (1996) (in Japanese)
(5) Goodwin, G. C., Long, R. S.: Generalization of Results on Multivariable Adaptive Control, IEEE Trans., AC-24-6, p. 1241-1245 (1980)
(6) Ito, K., Honda, S., Saito, T., Kurata, M., Naoe, G.: Development of Electronically Controlled Multi-purpose Engine iGX440, Honda R&D Technical Review, Vol. 17, No. 2, p. 44-51 (2005)
(7) Katori, H.: Hienkei Haguruma no Sekkei Seisaku to Ouyou, p. 7-34 (2001) (in Japanese)

Author (organization or company)

Tomoki FUKUSHIMA (Asakahigashi R&D Center)、Hayato MATSUDA(Asakahigashi R&D Center)、Yoshihisa SHINOGI(Asakahigashi R&D Center)、Yoichi TANIGUCHI(Asakahigashi R&D Center)

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