|
(11) | EP 0 343 515 A3 |
(12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||||||
(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. |