(19)
(11) EP 0 343 515 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.06.1990 Bulletin 1990/24

(43) Date of publication A2:
29.11.1989 Bulletin 1989/48

(21) Application number: 89108969.0

(22) Date of filing: 18.05.1989
(51) International Patent Classification (IPC)4: F02D 11/10
(84) Designated Contracting States:
DE ES FR GB SE

(30) Priority: 27.05.1988 IT 5318388 U

(71) Applicant: FIAT AUTO S.p.A.
I-10135 Torino (IT)

(72) Inventors:
  • Manfre', Giovanni
    I-10048 Vinovo (IT)
  • Carnio, Andrea
    I-10100 Torino (IT)

(74) Representative: Boggio, Luigi et al
STUDIO TORTA Società Semplice Via Viotti, 9
10121 Torino
10121 Torino (IT)


(56) References cited: : 
   
       


    (54) Device for regulating the air input flow rate to an internal combustion engine carburettor


    (57) A device for regulating the air input flow rate to an internal combustion engine carburettor during cold-starting is described; the device consists of a butterfly valve disposed upstream of the carburettor diffuser, elastic opposition means, an actuator operated by the engine temperature increase, and mechanical transmission means connecting the actuator, the opposition means and the butterfly valve together in such a manner as to keep this latter normally closed when the engine is cold; the actuator incorporates a shape memory element (SME) arranged to selectively assume, as a function of the instantaneous engine temperature, a plurality of predetermined shapes.







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