Patent ID: 6295954
Filing Date: 2001-10-02
Classification: F02B,F02F

Abstract:
A cylinder block for a water-cooled internal combustion engine, comprising:a row of cylinder wall sections each defining a cylinder bore;a water jacket wall defining a water jacket around the row;a top deck connecting upper ends of the cylinder wall sections and an upper end of the water jacket wall and thereby defining an upper end of the water jacket in the cylinder block;a cylindrical head bolt boss having a cylinder head bolt hole, the head bolt boss being formed in the water jacket wall; anda rib formed between the head bolt boss located at an end of the cylinder block and an adjacent one of the cylinder wall sections, and connected with the head bolt boss, the top deck, and the adjacent one of the cylinder wall sections;wherein said head bolt boss is a terminal head bolt boss, and the cylinder block further comprises a cylindrical intermediate head bolt boss having an inside cylindrical wall surface bared in the water jacket and separated from the cylinder wall sections.