PAG Lubricant Pre-ignition Prevention Engine

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Solution Overview

Problem

Current lubricants fail to effectively prevent or reduce pre-ignition in engines, particularly in small engines, and often require complex formulations or lead to issues like excessive volatility and compatibility problems with post-treatment systems.

Innovation Solution

A lubricating composition comprising polyalkylene glycol (PAG) obtained by polymerization or copolymerization of alkylene oxides with 3 to 8 carbon atoms, including butylene oxide, which is used in combination with base oil to prevent or reduce pre-ignition without the need for additional additives that might increase calcium content or volatility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If calcium content is reduced or zinc dithiophosphate/molybdenum dithiocarbamate content is increased to prevent pre-ignition, then pre-ignition resistance is improved, but lubricant stability and compatibility with post-treatment systems deteriorate

Engineering Contradiction:

Improvepre-ignition resistanceVSAvoidlubricant stability and compatibility

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention changes the chemical composition parameters of the lubricant by incorporating specific additives (calcium carbonate, zinc dialkyldithiophosphate, molybdenum dithiocarbamate) at controlled levels, along with polyalkylene glycol, to achieve pre-ignition protection while maintaining stability and compatibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite lubricant formulation combining multiple components (base oil, calcium carbonate, zinc dialkyldithiophosphate, molybdenum dithiocarbamate, polyalkylene glycol, and other additives) to simultaneously achieve pre-ignition resistance, lubricant stability, and post-treatment system compatibility

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If organic compounds comprising aromatic rings are added to delay ignition and reduce pre-ignition, then pre-ignition resistance is improved, but lubricant volatility increases excessively

Engineering Contradiction:

Improvepre-ignition resistanceVSAvoidlubricant volatility

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The invention carefully controls the composition and concentration of organic additives to achieve ignition delay effects while limiting volatility increase through optimized formulation parameters

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If complex formulations are used to prevent pre-ignition, then pre-ignition resistance is improved, but device complexity and ease of manufacture worsen

Engineering Contradiction:

Improvepre-ignition resistanceVSAvoidformulation complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention creates a multi-functional lubricant formulation where a single composition provides pre-ignition protection, lubrication, anti-wear properties, and compatibility with post-treatment systems, eliminating the need for multiple separate additives or complex formulation steps

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3331974B1Use of lubricating compositions for preventing or reducing pre-ignition in an engine

Publication Date: 2021.04.14 TOTAL MARKETING SERVICES SA

AI summary

The invention relates to the use of a lubricating composition comprising at least one base oil and at least one polyalkylene glycol (PAG) produced by polymerisation or copolymerisation of alkylene oxides comprising between 3 and 8 carbon atoms, at least one of which being a butylene oxide, for preventing or reducing pre-ignition in an engine, preferably in a vehicle engine.