(19)
(11) EP 0 488 969 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.11.1992 Bulletin 1992/48

(43) Date of publication A2:
03.06.1992 Bulletin 1992/23

(21) Application number: 91830521.0

(22) Date of filing: 27.11.1991
(51) International Patent Classification (IPC)5: F23N 1/02, F23N 5/18
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR LI LU NL SE

(30) Priority: 30.11.1990 IT 4853690

(71) Applicant: JACOROSSI S.p.A.
I-00144 Rome (IT)

(72) Inventors:
  • Verse', Federico
    I-00144 Rome (IT)
  • Seno, Lorenzo
    I-00144 Rome (IT)

(74) Representative: Iannone, Carlo Luigi et al
Ing. Barzanò & Zanardo Roma S.p.A. Via Piemonte, 26
I-00187 Roma
I-00187 Roma (IT)


(56) References cited: : 
   
       


    (54) Air-fuel ratio control device for heat generators, particularly for civil plants


    (57) This invention relates to a device for controlling the fuel/air ratio in heat generators, in particular for civil plants, said device comprising a first fuel flowrate sensor (1) which is sensitive to the mass flowrate and is capable of transducing the presence/absence of network at the terminals of the fuel flowrate control means into an ON/OFF electric signal, a second air flowrate sensor (2) which is sensitive to the mass flowrate, a transduction, control and actuation electronic member (3) which is capable of determining the operation of the device itself on the basis of values set forth in the start step and on the basis of the signals that arrive from the two sensors, and a motorized control means (9) which, following a command of an electric impulse sent by said electronic member (3) opens or closes the opening for the passage of comburant air so as to keepthe fuel/comburant ratio constant.






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