(19)
(11) EP 0 778 448 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.02.1999 Bulletin 1999/08

(43) Date of publication A2:
11.06.1997 Bulletin 1997/24

(21) Application number: 96118964.4

(22) Date of filing: 27.11.1996
(51) International Patent Classification (IPC)6: F23N 5/18, F23N 5/24
(84) Designated Contracting States:
DE FR GB

(30) Priority: 06.12.1995 JP 318196/95

(71) Applicant: YAMATAKE-HONEYWELL CO. LTD.
Tokyo 150 (JP)

(72) Inventors:
  • Takahashi, Norio, Yamatake-Honeywell Co., Ltd.
    Fujisawa-shi, Kanagawa 251 (JP)
  • Seki, Kazuo, Yamatake-Honeywell Co., Ltd.
    Fujisawa-shi, Kanagawa 251 (JP)
  • Momose, Osamu, Yamatake-Honeywell Co., Ltd.
    Fujisawa-shi, Kanagawa 251 (JP)
  • Aoshima, Shigeru, Yamatake-Honeywell Co., Ltd.
    Fujisawa-shi, Kanagawa 251 (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Martinistrasse 24
28195 Bremen
28195 Bremen (DE)

   


(54) Combustion control system


(57) A prior art combustion control system fails to accurately detect firing by deterioration of an ultraviolet sensor and to decide a suitable maintenance/checking timing. According to a combustion control system of the present invention, a flow velocity detector detects a flow velocity of a combustion air or a fuel gas supplied into a combustion chamber and a combustion controller decides whether a firing state is normal or abnormal on the basis of a decelerated state of the flow velocity detected by the flow velocity detector upon ignition operation of the combustion chamber.






Search report