Method for controlling a piston cooling circuit of an internal combustion engine of an industrial vehicle
AssigneeFpt Industrial S.P.A.
InventorClino D'Epiro
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Abstract
The present invention refers to a method for controlling a piston cooling circuit of an internal combustion engine wherein said circuit comprises at least a circulation pump and means for emitting cooling oil connected to the delivery of the pump. According to the method, said pistons are cooled by a jet generated by said emitting means only during the upward stroke of said pistons from the bottom dead center to the top dead center.
Claims14
A method for controlling a cooling circuit of the pistons of an internal combustion engine, said circuit comprising a circulation pump and a plurality of nozzles for emitting cooling oil connected to the output of said circulation pump and suitable to generate a cooling jet intended to hit said pistons, said method comprising the step of generating said jet only during the upward portion of the stroke of said pistons, the upward portion of the stroke including the movement of the pistons from the bottom dead center (BDC) to the top dead center (TDC).
A cooling circuit for cooling pistons of an internal combustion engine characterized in that it comprises a plurality of nozzles for emitting cooling oil which generate a jet of cooling oil intended to hit each one of said pistons only during the upward stroke of said pistons from the bottom dead center (BDC) to the top dead center (TDC), the plurality of nozzles in fluid communication with a pump;
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- a plurality of activation/deactivation valves (9), located in between the plurality of nozzles and the pump, the valves in fluid communication with both the plurality of nozzles and the pump, and each one of the valves being associated to a corresponding nozzle in order to allow its activation/deactivation.
Dependencies are inferred from the claim text.