Browse Publications Technical Papers 2003-01-1974

Mechanism of Negative Pressure Generation in the Sliding Process of Paper-based Wet Frictional Material 2003-01-1974

It has been reported that negative pressure value was detected on the sliding surface of paper-based porous frictional material which is used in the automatic transmission. In this study, the effects of sliding velocity, contact pressure and surface geometry including diameter of measurement hole, surface roughness of frictional material, and porosity on the pressure detected by the hydraulic system were investigated, and mechanism of the negative pressure generation was discussed. It is considered that the pressures produced by various origins are summated into the resultant value indicating negative in the conventional oil film pressure measurement system.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.