| 摘要 |
The invention relates to an intake air mixing device having an automatically piloted partial vacuum control. The subject of the invention is an intake air mixing device having an automatically piloted partial vacuum control for an internal combustion engine with carburettor comprising a casing 1 equipped with a fresh air intake duct 1A, a hot air intake duct 1B, a mixed air outlet duct 1C and a flap 12 capable of closing the hot air intake or the fresh air intake and of occupying all the intermediate positions, the said flap being actuated by a rod 10 which is a part of a depression member consisting of a capsule 3 delimiting a volume 6 closed by a flexible membrane 9 and pushed by a spring 8, the said rod being integral with the membrane, the inside of the said volume being connected, along with the air intake duct, to the engine through a first controllable valve, characterised in that it comprises first means 37 to keep open the said valve when the temperature of the intake air fed to the carburettor reaches a first threshold value and second means 47 to connect the volume 6 to atmospheric pressure when a temperature representative of the engine temperature reaches a second threshold value. Application to engines of motor vehicles. <IMAGE>
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