| 摘要 |
In an IC engine of the piston type comprising at least one engine inlet valve placed between an inlet duct and each combustion chamber and a swing type check valve, which is arranged in the inlet duct upstream from the inlet valve, is adapted to shut against the direction of inlet flow and in the shut position engages an electromagnet, said check valve having an opening threshold able to be adjusted with respect to its time lag in relation to the start of inlet by the engine inlet valve, the power supply circuit of the electromagnet includes an interrupter actuated in accordance with the operating parameters of the engine.
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