Lubricant composition containing magnesium detergent for reducing pre-ignition in hydrogen-fueled engines

By using a lubricating oil composition containing an alkaline magnesium detergent in a hydrogen-fired internal combustion engine, the problem of frequent pre-ignition in the engine has been solved, resulting in a significant reduction in pre-ignition events and an improvement in engine performance.

CN122374423APending Publication Date: 2026-07-10INFINEUM INT LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INFINEUM INT LTD
Filing Date
2024-11-27
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Pre-ignition events occur frequently in hydrogen-fired internal combustion engines, leading to engine damage and performance degradation. Existing lubricant compositions cannot effectively address this unique challenge.

Method used

A lubricating oil composition containing a super-alkaline magnesium detergent is used. By using components such as super-alkaline magnesium salicylate, magnesium sulfonate, or magnesium phenolate, combined with appropriate base oils and detergents, a lubricant with a high base number and specific treatment level is formed, which significantly reduces pre-ignition events.

Benefits of technology

It significantly reduces the pre-ignition frequency of hydrogen-fired internal combustion engines, improves engine performance and durability, reduces abnormal combustion events, improves fuel economy, and reduces air treatment costs.

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Abstract

The present invention relates to a method of reducing abnormal combustion events in a hydrogen-fueled internal combustion engine (HICE) during engine operation. The method comprises the steps of: a) providing to the HICE a lubricating oil composition comprising or resulting from admixing: i) a base oil having a KV100 of less than or equal to 12 cSt and a content of greater than 50 wt% of the composition and comprising a Group I base oil, a Group II base oil, a Group III base oil, a Group IV base oil, or a combination thereof; ii) an overbased magnesium-containing detergent comprising an overbased magnesium salicylate, an overbased magnesium sulfonate, an overbased magnesium phenate, or a combination thereof having a total base number (KOH / g) of greater than or equal to 9 and less than or equal to 500 and included at a treat level to the composition providing between 100 and 5000 ppm by weight of total magnesium and between 0.15 wt% and 8.0 wt% of total soap; iii) at least one overbased calcium-containing detergent having a total base number (KOH / g) of greater than or equal to 9 and of less than or equal to 500 and included at a treat level to the composition providing greater than 100 ppm by weight of total calcium; and iv) the lubricating oil composition having less than or equal to 2.0 wt% of total sulfated ash, less than or equal to 0.120 wt% of total phosphorus level, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X, or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50, or 60; b) providing to the HICE a hydrogen-containing fuel; and c) combusting the fuel in the HICE. Also provided are lubricating oil compositions and concentrates for reducing the propensity for abnormal combustion events in a HICE.
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Citation Information

Patent Citations

  • Improved demulsified lubricating oil compositions

    EP0330522A2

  • Succinimide compositions

    EP0451380A1

  • High temperature functional fluids

    EP0471071A1

  • Lubricating compositions containing the reaction product of an aromatic amine and a carboxylic functionalised polymer and dispersant

    EP2401348A1

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    EP2940110A1