Imide Bis-Amide Friction Modifiers for Transmission Shudder

The patent applies parameter changes by modifying the chemical structure of friction modifiers to include specific molecular weight ranges (500-5000), particular functional groups (hydroxyl, carboxyl, amine), and controlled carbon atom counts (15-35 average). These parameter adjustments enable the friction modifier to simultaneously achieve high static coefficient of friction and durable positive slope characteristics, resolving the contradiction between initial friction performance and long-term durability.

The patent employs composite materials by formulating friction modifiers as complex molecules containing multiple functional groups (hydroxyl, carboxyl, amine) within the same molecular structure. This composite approach allows different functional groups to work synergistically - providing both immediate friction modification (high static coefficient) and sustained performance (positive slope durability), thereby resolving the contradiction between the two performance requirements.

The patent applies preliminary action by incorporating stabilizing functional groups (hydroxyl, carboxyl, amine) into the friction modifier structure before the fluid is put into service. These pre-integrated functional groups proactively prevent degradation mechanisms, ensuring that the positive slope characteristics remain durable throughout the fluid's service life, thus resolving the contradiction between initial clutch holding capacity and long-term durability.

The patent ensures continuity of useful action by designing friction modifiers with molecular structures that maintain their friction-modifying capabilities over extended periods. The specific functional groups and molecular weight ranges are selected to prevent premature degradation, ensuring continuous provision of both high static coefficient of friction and durable positive slope throughout the fluid's service lifetime, thereby resolving the contradiction between initial performance and duration.