Process for reducing injector deposits
AssigneeShell USA, Inc.
InventorsRobert Wilfred Matthews Wardle, Johannes Leendert Willem Cornelis Den Boestert, Nicholas James Rounthwaite, Huw Jones
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Abstract
A process for reducing injector deposits in an internal combustion engine fuelled with a fuel composition, the process comprising contacting a fuel composition with a metal-selective membrane situated in the fuel delivery system. The reduction of such deposits provides an increase in fuel efficiency, fuel thermal stability, boost in engine cleanliness, improves fuel economy and enables the possibility of using a reduced amount of expensive detergent in the fuel composition.
Claims11
A process for reducing injector deposits in an internal combustion engine which is fuelled with a fuel composition comprising a trace metal, the process comprising contacting the fuel composition with a non-porous or nanofiltration metal-selective membrane situated in a return line of a fuel delivery system which is configured to provide the fuel composition from an injector situated in the internal combustion engine to a fuel tank, wherein the fuel composition is a diesel fuel composition and wherein the internal combustion engine is a diesel engine, wherein the metal-selective membrane has an average pore size of at most 5 nm and is selected from polymers comprising units according to general formula:
- —Si(R)(R′)—O— wherein R and R′ represent moeities chosen from the groups consisting of hydrogen, halogen, alkyl, aryl, cycloalkyl, and aralkyl moieties.
A process for reducing injector deposits in an internal combustion engine which is fuelled with a fuel composition comprising a trace metal, the process comprising contacting the fuel composition with a non-porous or nanofiltration metal-selective membrane situated in a kidney loop filtration system which is configured to act upon a fuel tank, wherein the fuel composition is a diesel fuel composition and wherein the internal combustion engine is a diesel engine wherein the metal-selective membrane has an average size of at most 5 nm and is selected from polymers comprising units general formula:
- —Si(R)(R′)—O— wherein R, and R′ represent moieties chosen from the groups consisting of hydrogen halogen alkyl, aryl, cycloalkyl, and aralkyl moieties.
A process for reducing injector deposits in an internal combustion engine which is fuelled with a fuel composition comprising a trace metal, the process comprising contacting the fuel composition with a non-porous or nanofiltration metal-selective membrane situated in a return line of a fuel delivery system which is configured to provide the fuel composition from an injector situated in the internal combustion engine to a fuel filter, wherein the fuel composition is a diesel fuel composition and wherein the internal combustion engine is a diesel engine, wherein the metal-selective membrane has an average pore size of 0.5 to 5 am and is selected from polymers comprising units according to the general formula:
- —Si(R)(R′)—O— wherein R and R′ represent moieties chosen from the groups consisting of hydrogen halogen, alkyl aryl cycloalkyl, and aralkyl moieties.
A process for reducing injector deposits in an internal combustion engine which is fuelled with a fuel composition comprising a trace metal, the process comprising contacting the fuel composition with a non-porous or nanofiltration metal-selective membrane situated in a low-pressure line of a fuel delivery system which is configured to provide the fuel composition from a fuel tank to an injector, wherein the fuel composition is a diesel fuel composition and wherein the internal combustion engine is a diesel engine, wherein the metal-selective membrane has an average pore size of 0.5 to 5 nm and is selected from polymers comprising units according to the general formula:
- —Si(R)(R′)—O— wherein R and R′ represent moieties chosen from the groups consisting of hydrogen, halogen, alkyl, aryl, cycloalkyl, and aralkyl moieties.
Dependencies are inferred from the claim text.