WET FRICTION CLUTCH-LUBRICANT SYSTEMS PROVIDING HIGH DYNAMIC COEFFICIENTS OF FRICTION THROUGH THE USE OF BORATED DETERGENTS

摘要

A wet friction clutch—lubricant system wherein a wet friction clutch having a cellulose—based friction lining having a surface coating of silica based particles, or a device including such a clutch, is lubricated with a lubricant composition a major amount of oil of lubricating viscosity and minor effective amounts of performance enhancing additives including (a) ashless dispersant; (b) organic phosphorus compound and (c) borated detergents; and optionally, (d) an auxiliary friction modifier.