Lubricant Additive Booster for Viscosity and Piston Cleanliness
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Solution Overview
Problem
Existing lubricant compositions using group I/group III base oil mix struggle to pass diesel soot induced viscosity thickening, diesel piston cleanliness, and gasoline viscosity increase/gasoline piston deposit tests effectively.
Innovation Solution
An additive package comprising a dispersant mixture of reaction products from conventional polyolefin acylating agents and aromatic or aliphatic amines, combined with an ashless antioxidant mixture and an over-based phenol-containing detergent, is introduced to improve piston cleanliness and mitigate viscosity thickening in both diesel and gasoline engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If group I/group III base oil mix is used in lubricant composition, then cost and availability are improved, but soot induced viscosity thickening and piston cleanliness performance deteriorate
Solution Approach 1:
The patent employs a composite additive package combining multiple dispersant types (polyisobutylene succinimide, polyalphaolefin succinimide, and aromatic amine derivatives) with specific molecular weight ranges and structural characteristics. This composite approach creates synergistic effects that enable group I/group III base oil mixes to resist soot-induced viscosity thickening and maintain piston cleanliness, achieving performance comparable to higher-grade base oils.
2Device complexity
If conventional dispersants are used in lubricant composition, then formulation simplicity is improved, but piston cleanliness and deposit control performance deteriorate
Solution Approach 1:
The patent specifies precise parameter ranges for dispersant molecular weights ( Mn 500-5000 for PIB-succinimide, Mn 1000-10000 for PAO-succinimide) and structural characteristics (aromatic content, nitrogen content). By controlling these parameters within defined ranges, the formulation achieves optimal piston cleanliness and deposit control while maintaining manageable formulation complexity through standardized production processes.
3Stability of the object's composition
If high molecular weight dispersants are used to reduce soot induced viscosity thickening, then viscosity stability is improved, but piston cleanliness performance may deteriorate
Solution Approach 1:
The patent divides the dispersant system into multiple segments with different molecular weight ranges and functional characteristics. The PIB-succinimide (Mn 500-5000) targets soot aggregation control for viscosity stability, while the PAO-succinimide (Mn 1000-10000) and aromatic amine derivatives address piston deposit control. This segmentation allows each component to optimize its function without compromising the other.
Data Source
AI summary
The disclosed technology relates to additive packages for lubricating compositions in diesel and gasoline powered vehicles. In particular, the disclosed technology provides an additive package that can be added to a lubricating composition with oil of lubricating viscosity to improve at least one of (A) piston deposit, (B) piston cleanliness, (C) soot induced viscosity thickening, and (D) oxidation induced viscosity thickening.