| 摘要 |
PURPOSE:To reduce size by setting the crank ratio to 3.0 to 3.2 and also arranging such that the lower end of piston gets out of the lower end of cylinder liner as soon as a state at which the side pressure between the piston and cylinder liner assumes a second minimam value is brought about in the power stroke. CONSTITUTION:A point B, at which the side pressure F between piston P and cylinder liner CL takes a second minimum value, is set to be a limit of compression of the cylinder liner such that the lower end PS of the piston gets out of the lower end CL of the cylinder liner from the point B. At this time, the crank ratio is set to be within a range between 3.0 and 3.2. |
