Use Of A Fuel Composition Comprising Three Additives For Cleaning The Internal Parts Of Petrol Engines
Patent No. EP4157972 (titled "Use Of A Fuel Composition Comprising Three Additives For Cleaning The Internal Parts Of Petrol Engines") was filed by Totalenergies Onetech on May 28, 2021. The application was issued on Jul 16, 2025.
Patent Summary
A fuel composition for reducing or preventing deposits in spark-ignition engine internal parts comprises three additives: (1) a quaternary ammonium salt produced by reacting a quaternization agent with a nitrogen compound (the reaction product of polyisobutenyl succinic anhydride and a tertiary amine of formula (I), where R6/R7 are C1-C5 alkyl groups, X is a C1-C5 alkylene group, and R8 is hydrogen), (2) a non-quaternary polyisobutylene succinimide, and (3) a Mannich base. The weight ratio of the first additive to the second additive ranges from 0.2:1 to 2.5:1. The composition provides keep-clean and clean-up effects for fuel injection systems and combustion chambers, preventing coking, lacquering, and valve-sticking in direct and indirect injection engines.
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Date
Description
EP4157972
- Application Number
- EP21734411A
- Filing Date
- May 28, 2021
- Status
- Granted And Under Opposition
- Jun 13, 2025
- Publication Date
- Jul 16, 2025
- External Links
- Slate, Register , Google Patents