| 摘要 |
<p>An air inlet is connected to an orifice in an air intake passage of the engine upstream of a throttle valve, and an air outlet is connected to an orifice in the passage downstream of the throttle valve. An obturator is suitable to vary the passage section between the air inlet and outlet under the action of an electromagnet and a contrast spring. - The obturator is pref. joined to the mobile keeper of the electromagnet, is made of non-magnetic material and slides inside a tubular element provided with orifices and the air inlet. The thickness of the obturator is designed to control the magnetic adhesive force of the keeper on the tubular element.</p> |
