HOLLOW POPPET VALVE Russian patent published in 2018 - IPC F01L3/14 F16K49/00 

FIELD: engines and pumps.

SUBSTANCE: hollow poppet valve (10) has a head (14) formed integrally with one end side of the stem (12). The valve (10) comprises a hollow part (S1) disposed on the head side (14) and a hollow part (S2) located on the side of the stem (12). The hollow part (S1) and the hollow part (S2) are separated from each other by a partition (15) formed in the region of the halving part (13) between the valve head (14) and the valve stem (12). Hollow part (S1), located on the side of the head (14), formed by partitioning (15), spherical indentations hull heads (14) and the closing element forming the bottom of hollow parts (S1), located on the side of the head (14). On the head side facing the combustion chamber (14), in a hollow part (S1), located on the side of the head, there is heat-insulating part containing gas or material, which has a lower thermal conductivity compared with metal forming valve (10). In the hollow part (S2) located on the side of the stem (12), there is a cooling part, into which the coolant (19) is loaded. Thermal insulation effect is achieved in the heat-insulating part. The heat dissipating effect is achieved in the cooling part. By specifying at least one out of the wall (15) in the direction of up and down and the length of the partitions (15) in the direction of upside-down is provided by regulation of the relative values of heat-insulating and heat dissipating effect. A method for controlling the relative values of the heat-insulating effect and the heat-dissipating effect of the hollow poppet valve is disclosed.

EFFECT: increase the mechanical strength of the poppet valve.

2 cl, 8 dwg