Hydrogen-Fueled Engine Lubricant Composition for Pre-Ignition Reduction
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Solution Overview
Problem
Hydrogen fueled internal combustion engines experience unique challenges with abnormal combustion events such as pre-ignition due to their distinct combustion properties, which are not effectively addressed by existing lubricant chemistries designed for gasoline engines.
Innovation Solution
A lubricating oil composition comprising a functionalized polymer, overbased magnesium and calcium detergents, higher and lower molecular weight PIBSA-PAM dispersants, and zinc hydrocarbyl diphosphate compounds, formulated to reduce abnormal combustion events by decreasing pre-ignition frequency in hydrogen fueled engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricant chemistries designed for gasoline engines are used in hydrogen fueled engines, then the engine can operate with standard lubrication, but abnormal combustion events such as pre-ignition occur frequently
Solution Approach 1:
The patent modifies the chemical composition parameters of the lubricant by incorporating specific additives (overbased magnesium and calcium detergents, zinc hydrocarbyl diphosphate, functionalized polymers) to change the lubricant's interaction with hydrogen combustion, thereby reducing pre-ignition events while maintaining engine compatibility
Solution Approach 2:
The invention creates a composite lubricant formulation combining multiple additive packages (detergents, dispersants, anti-wear agents, friction modifiers) work together synergistically to address the unique combustion characteristics of hydrogen engines, achieving both protection and abnormal combustion reduction
2Reliability
If lubricating oil composition with multiple additives is used to reduce pre-ignition, then pre-ignition frequency decreases by at least 20%, but the composition complexity increases
Solution Approach 1:
The lubricant composition is designed with multi-functional additives that simultaneously perform multiple roles: overbased detergents neutralize acids and control deposits, zinc hydrocarbyl diphosphate provides anti-wear protection and pre-ignition reduction, and functionalized polymers modify combustion characteristics, allowing a single composition to address multiple engine protection needs
Data Source
AI summary
This invention relates to a lubricating oil composition for a hydrogen fueled internal combustion engine (H2ICE) comprising or resulting from the admixing of: (i) base oil, (ii) a functionalized polymer, (iii) an overbased magnesium based detergent, (iv) an overbased calcium based detergent and (iv) one or more, optionally borated, higher and lower molecular weight PIBSA-PAM dispersants, and one or more zinc hydrocarbyl diphosphate compounds. The composition has a total sulfated ash of less than or equal to 1.0 wt. %, a kinematic viscosity at 100° C. of 5 to 20 cSt, a total phosphorous level of less than or equal to 0.12 wt. %, and a total sulfur level of less than or equal to 0.4 wt. %. The composition provides a reduction in abnormal pre-ignition events during combustion in a H2ICE compared to a comparable composition not including the combination of the functionalized polymer, the higher molecular weight PIBSA-PAM, the lower molecular weight PIBSA-PAM, the overbased magnesium containing detergent, the overbased calcium containing detergent, and the one or more zinc hydrocarbyl diphosphate compounds. Also provided are a method of making the composition, a method of lubricating a hydrogen engine, a method of reducing abnormal combustion events in a H2ICE, and a hydrogen engine oil additive concentrate composition.