Device for control of a butterfly valve of an internal combustion engine and internal combustion engine comprising said device
AssigneeFpt Industrial S.P.A.
InventorsMarcello Caro, Bruno Aimar, Aldo Brucato
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Abstract
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.
Claims4
An electronic control unit (ECU) for controlling a butterfly valve of an internal combustion engine, wherein the electronic control unit is configured to:
- send a control signal to rotate said butterfly valve so as to open and close a suction duct, the control signal being indicative of an angular position of said butterfly valve;
- receive a pressure measured upstream of the butterfly valve in said suction duct;
- calculate a ratio between a target pressure downstream of the butterfly valve and the measured pressure;
- perform a check of whether said calculated ratio is greater than a first predetermined threshold;
- limit a gradient for rotating said butterfly valve in said control signal to a first predetermined maximum when said check is positive;
- and
- apply no limitation or a second predetermined maximum to said gradient when said check is negative,
- wherein said second predetermined maximum is greater than the first predetermined maximum.
Dependencies are inferred from the claim text.