Choke device for an internal combustion engine intake system

摘要

A choke device (13) for an intake system of an internal combustion engine (1); the choke device (13) has at least one choke body (15) fitted movably inside an intake conduit (9), and an actuating device (17) for moving the choke body (15) to and from a work position in which the choke body (15) reduces the cross section of the intake conduit (9); and the actuating device (17) has a filiform actuating member (23) made of a shape-memory material that changes shape when subjected to physical external stress, and having a first portion (24) embedded in the choke body (15), and a second portion (25) located outside the choke body (15) and secured mechanically to a fixed part.