CONTROL DEVICE FOR GAS EXCHANGE IN PISTON ENGINE Russian patent published in 2015 - IPC F01L13/00 F01L9/02 F01L1/14 F02D13/02 

FIELD: engines and pumps.

SUBSTANCE: control device for gas exchange in a piston engine has a cam device of a cam shaft of the engine, which interacts with an inlet valve mechanism for opening and closing of the inlet valve of the engine cylinder. The control device includes part (8) of the housing, in which piston device (9) having a possibility of being moved and connected to the cam device and the valve mechanism is arranged. Guide element (10) is arranged in part (8) of the housing between the cam device and piston device (9) with possibility of being moved in response to movements of the cam device. The control device includes control means of inlet valve opening time. Guide element (10) is equipped with auxiliary piston (13) arranged with a possibility of being moved between guide element (10) and piston device (9) and together with guide element (10) determining chamber (14). Part (8) of the housing is equipped with inlet channel (15) and outlet channel (17), which are located at the distance along movement direction of guide element (10) and arranged in their turn so that they are interconnected with the above chamber (14) through a circuit made in guide element (10) so that in order to choose the increased time of the inlet valve opening, chamber (14) is filled with hydraulic medium by means of inlet channel (15) during inlet valve closing so that relative movement of auxiliary piston (13) in relation to piston device (9) can be caused. Hydraulic medium leaves chamber (14) during displacing movement of the inlet valve by means of outlet valve (17). As a result, displacement of the inlet valve in a peak phase of inlet valve opening remains unchanged.

EFFECT: improvement of cylinder gas exchange.

5 cl, 15 dwg