| 摘要 |
A cylinder block of an internal combustion engine, comprises a plurality of main bearing bulkheads, two oppositely disposed oil pan installation flange portions which are integral with the bearing bulkheads and made of a light alloy same as the bearing bulkheads, and a reinforcement member cast in and embedded throughout each oil pan installation flange portion and each main bearing bulkhead bottom section, the material of said reinforcement member being different from and high in mechanical strength than the light alloy, thereby greatly improving the rigidity of each bearing bulkhead bottom section to prevent each bearing bulkhead bottom section from vibrating. |
