Water jacket for cylinder head

1. A water jacket for a cylinder head, comprising:

an upper body disposed at an upper part of the cylinder head inside the cylinder head, a coolant flowing through the upper body;

a lower body disposed under the upper body inside the cylinder head, the coolant flowing through the lower body; and

a connector disposed corresponding to a position of an exhaust valve between the upper body and the lower body and integrally connected to the upper body and the lower body,

wherein the connector has at least one penetration hole along a length direction,

wherein the lower body includes:

a plurality of inflow protrusions for each combustion chamber along the length direction at a lower surface corresponding to a position of the connector; and

a plurality of exhaust protrusions for each combustion chamber along the length direction at a position facing the plurality of inflow protrusions by corresponding to a position of an intake valve.

2. The water jacket for the cylinder head of claim 1 , wherein

the at least one penetration hole is respectively located between each combustion chamber of an engine and at both ends in the length direction of the connector to prevent the coolant inflowing from the lower body from directly inflowing to the upper body.

3. The water jacket for the cylinder head of claim 1 , wherein

when the coolant inflows from the lower body to the upper body, a flow speed increases through the connector partitioned by the at least one penetration hole.

4. The water jacket for the cylinder head of claim 1 , wherein

the connector inflows part of the coolant flowing through each inflow protrusion inside the cylinder block to the upper body.

5. The water jacket for the cylinder head of claim 4 , wherein

each exhaust protrusion exhausts the coolant passing through the lower body to the cylinder block except for the coolant inflowing to the upper body through the connector.

6. The water jacket for the cylinder head of claim 1 , wherein

the coolant inflowing to each inflow protrusion flows as a cross-flow type to pass through an intake valve side from an exhaust valve side of the cylinder head while moving along the length direction of the cylinder head and being exhausted to each exhaust protrusion.

7. The water jacket for the cylinder head of claim 1 , wherein

the coolant inflowing to the cylinder block through each exhaust protrusion is exhausted outside from the cylinder block through a separate exhaust core disposed at one side separated from the lower body.

8. The water jacket for the cylinder head of claim 1 , wherein

a coolant exhaust port is disposed in the upper body.