| 摘要 |
PURPOSE:To enoughly decrease span of a reinforcing rib and to increase a maximum pressure in a cylinder without an increase in thermal stress and mechanical stress, by a method wherein, after a bottom wall part and a reinforcing part are formed separately from each other, the two parts are integrally joined together. CONSTITUTION:A cylinder head has a bottom wall part 1, having an under surface situated in a combustion chamber, and a reinforcing part 2 situated in a direction reverse to that of a combustion chamber. In which case, the bottom wall part 1 is formed by a laminar member, and a hole 3 for feed air, a hole 4 for exhaust valve, a hole 5 for fuel valve, a hole 6 for starting valve, and a hole 7 for safety valve are respectively formed. Meanwhile, the reinforcing part 2 has a reinforcing rib 9 by which an outer cylinder 8 is partitioned from the interior of the outer cylinder 8, and a feed air passage 10, an exhaust gas passage 11, a fuel passage 12, and a cooling water passage 13 are partitioned from each other by means of the reinforcing rib 9. In a state in that the holes 3-7 coincide with passages 10-13, respectively, the under surface of the reinforcing part 2 is joined integrally with the upper surface of the bottom wall part 1 to form a cylinder head. |
