1994 Volume 60 Issue 578 Pages 3492-3498
In order to clarify the behavior of oil film between piston ring and cylinder liner, pressure measurement and visualization of oil film are carried out in parallel using a simulating rig. In this rig, the piston ring is simulated by a straight glass bar test piece while the cylinder is simulated by a reciprocating flat plate. As a result, the following results are obtained. The oil film pressure of the full film region before rupture is negative and the maximum negative pressure is -0.35 MPa, i.e., tension. Cavities are formed at 20°∼30° crank angles from dead centers in the full film region, and grow with the increase of the crank angle. Then, new series of cavities are formed at the rear edge of the test piece. These two series of cavities coalesce and the flow becomes perturbed momentarily. The negative pressure is detected at 20°∼30° crank angles from dead centers and is not released until coalescence of cavities takes place.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
Transactions of the Japan Society of Mechanical Engineers Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
