Off Center Piston Pin Owing to the off-centered piston pin, the connecting rod shifts its direction of attack, and so does the piston its tangential angle in relation to the cylinder wall prior to reaching the top dead center (TDC). Since in this position the combustion has not yet begun, the prevailing side forces are still small. which permits the piston to shift onto the opposite cylinder wall softly rather than with a slamming impact. As a result, piston slap noise occuring at time of the pressure point shift is kept at a minimum, especially when the piston to cylinder wall clearance is greater than normal. |
