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AssigneeFpt Industrial S.P.A.
InventorsMarcello Caro, Bruno Aimar, Aldo Brucato
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A control method of a butterfly valve of an internal combustion engine, when said internal combustion engine is running, wherein said butterfly valve is controlled by means of a control signal, indicative of an angular position of said valve, the method comprising a step of applying a first limiting filter of a gradient of said control signal, when a ratio between a target pressure downstream of the butterfly valve and a measured pressure upstream of the butterfly valve is greater than a first predetermined threshold.
A control method of a butterfly valve (F) of an internal combustion engine, when said internal combustion engine is running, wherein said butterfly valve is controlled by means of a control signal, indicative of an angular (alfa) position of said valve, the method comprising a step of applying a first limiting filter (Step 4) of a gradient of said control signal, when a ratio between a target pressure (Pressure_air_Target) downstream of the butterfly valve and a measured pressure (P1) upstream of the butterfly valve is greater (Step 3:
An internal combustion engine comprising a butterfly valve (F) on a relative suction duct, a first pressure sensor (P1) arranged upstream of the butterfly valve, a temperature sensor arranged immediately upstream or downstream of said butterfly valve, an actuator for said butterfly valve and a position sensor (SA) adapted to measure a position of said butterfly valve in respect to a reference position (X), wherein the engine comprises a device arranged to limit an opening speed of said butterfly valve only when a ratio between a measured pressure upstream and a target pressure (Pressure_air_Target) exceeds a predetermined threshold (S1).
Dependencies are inferred from the claim text.