| 摘要 |
A cooling water injector of a water jacket of a cylinder head is provided to form 1.5 to 1.8 of a shape ratio to increase flow rate and to obtain the maximum discharge speed by narrowing a sectional area of the outlet of the injector. A cooling water injector(20) of a water jacket(10) of a cylinder head is curved so that an inlet(21) and an outlet(22) of cooling water make a right angle to each other. Curved parts(23,24) are rounded. A shape ratio(X/H) is a ratio of a height(H) from the inlet to the outlet center and a length(X) from the outlet to the inlet center. The shape ratio is 1.5 to 1.8. The outlet formed position is within a formed range of the eddy formed at the outlet of the lower end of the injector. |
