摘要:
The invention concerns a method of increasing the dynamic coefficient of friction in an oil-lubricated friction clutch by using a lubricating oil containing at least one specific copolymer, the presence of which develops higher dynamic friction levels in the clutch.
摘要:
The present invention discloses a method for lubricating a transmission having at least one electromechanical component and at least one mechanical component in a single housing. The method includes supplying a lubricant composition made up of (a) a base oil; (b) an oil soluble, phosphorus-containing compound; and (c) a corrosion inhibitor to the transmission.
摘要:
A method for improving the fuel economy of an automobile is disclosed. The method involves lubricating an automotive transmission system with a lubricant composition containing (a) an oil of lubricating viscosity; (b) a viscosity modifying polymer comprising linear polymers characterized by the formula: D′-PA-D″; and star polymers characterized by the formula: (D′-PA-D″)n-X; wherein D′, PA, D″ are polymer blocks as defined herein; and (c) a performance additive package.
摘要:
Lubricating oil compositions having excellent friction stability comprise a base lubricating oil, an oil soluble source of phosphorus and a defined polyalkylene polyamine-based friction modifier that has been reacted with a borating agent to convert at least one secondary amine group into the corresponding boric acid ester or boric acid salt.
摘要:
A wet friction clutch-lubricant system wherein a wet friction clutch having a cellulose-based friction lining, 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) one or more ashless dispersant; (b) one or more organic phosphorus compound and (c) one or more sodium salt of an organic acid; and optionally, (d) an auxiliary friction modifier.
摘要:
Lubricating oil compositions having excellent friction stability comprise a base lubricating oil, an oil soluble source of phosphorus and a defined polyalkylene polyamine-based friction modifier that has been reacted with a borating agent to convert at least one secondary amine group into the corresponding boric acid ester or boric acid salt.
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.
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.
摘要:
Lubricating oil compositions having excellent friction stability comprise a base lubricating oil, an oil soluble source of phosphorus and a defined polyalkylene polyamine-based friction modifier that has been reacted with an acylating agent to convert at least one secondary amine group into an amide.
摘要:
A method of controlling the friction coefficients and improving the friction durability of an oleaginous compositions, such as an ATF, comprising adding to the composition a combination of competing additives comprising (1) at least one friction modifying chemical additive having a polar head group and a friction reducing substituent group and (2) at least one non-friction reducing additive and/or friction increasing additive having the same polar group as the friction modifying chemical additive, but having a substituent group which has no material friction raising or lowering effect (non-friction reducing additive) or a substituent group which increases the friction coefficients (friction increasing additive) of the composition.