| 摘要 |
A cylinder block for an internal combustion engine includes a cylinder bore with an inner wall for containing a piston. The piston carries an upper piston ring spaced below a top surface of the piston. A removed area is formed in the inner cylinder wall having a lower edge spaced from a top surface of the cylinder wall and partially defining a void space having a greater diameter than the diameter of the inner cylinder wall. The void space is arranged to receive engine combustion particles scrapped from the inner cylinder wall by the upper piston ring to prevent build up of the particles on the inner cylinder wall in the line of movement of an upper outer edge of the upper piston ring. |
