ZDDP Lubricant Additive Composition for Engine Deposit Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current zinc dialkyl dithio phosphate (ZDDP) formulations in engine oils can lead to unwanted piston deposit formation, which affects lubricant performance and engine deposit ratings, necessitating a composition that enhances lubricant performance without increasing piston deposits.
Innovation Solution
A lubricant composition comprising a base oil with NOACK volatility between 5 to 15 wt.% and a zinc dialkyl dithio phosphate (ZDDP) with an average number of carbon atoms at least 9.0, where at least 65 mole percent of ZDDP compounds are derived from primary alcohols, and greater than 40 mole percent have alkoxy moieties from alcohols with four carbon atoms, providing 0.01 wt% to 0.15 wt% phosphorus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ZDDP formulations are used to provide anti-wear and anti-corrosion protection, then lubricant performance is improved, but piston deposit formation increases
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of ZDDP - specifically using primary alcohols with 4-8 carbon atoms (with emphasis on C4 and C5) to create ZDDP compounds with average carbon atoms of at least 9.0. This chemical parameter modification allows the additive to maintain anti-wear and anti-corrosion protection while reducing piston deposit formation, resolving the technical contradiction between lubricant performance and deposit control
Solution Approach 2:
The patent employs composite materials by creating a blended ZDDP composition that combines multiple primary alcohol-derived ZDDP compounds (C4, C5, C6, C7, C8) in specific proportions. This composite approach, where at least 65 mole percent comes from primary alcohols and greater than 40 mole percent has alkoxy moieties from C4 alcohols, produces a synergistic effect that delivers both protective functions and reduced deposits
2Object-generated harmful factors
If ZDDP compositions with higher carbon atom counts are used to reduce deposits, then piston deposit formation decreases, but lubricant performance may be compromised
Solution Approach 1:
The patent optimizes the carbon atom parameter by setting the average number of carbon atoms in the ZDDP composition to at least 9.0, while simultaneously specifying the alcohol source (primary alcohols with 4-8 carbon atoms). This precise parameter control ensures that the higher carbon count reduces piston deposits while the specific primary alcohol structure maintains anti-wear and anti-corrosion performance
Solution Approach 2:
The patent applies local quality by differentiating between various ZDDP components based on their alcohol origin. By specifying that greater than 40 mole percent has alkoxy moieties from C4 alcohols and at least 65 mole percent from primary alcohols, the patent creates localized chemical characteristics within the composite that simultaneously achieve deposit reduction and performance maintenance
Data Source
AI summary
The embodiments described herein relate to particular formulations and methods that provide reduced engine deposits. The lubricant composition includes a base oil having a NOACK volatility of from 5 to 15 and a zinc dialkyl dithio phosphate composition. The zinc dialkyl dithio phosphate composition has (i) from 15 to 30 mole percent of zinc dialkyl dithio phosphate compounds derived from alcohols having five carbon atoms, or (ii) at least 65 mole percent of zinc dialkyl dithio phosphate compounds derived from all primary alcohols, wherein the zinc dialkyl dithio phosphate composition has greater than 40 mole percent zinc dialkyl dithio phosphate compounds having alkoxy moieties derived from alcohols having four carbon atoms.