Fuel compositions containing esteramines

A method for reducing combustion chamber and intake valve deposits in a four cycle engine, comprising:

• providing a hydrocarbon fuel for a four cycle engine;
• and
• adding to the hydrocarbon fuel an effective combustion chamber and intake valve deposit-controlling amount of an additive, the additive consisting essentially of at least one esteramine of the formula:
• ##STR7## wherein R.sup.1 is a hydrocarbon group derived from coco, tallow or hydrogenated tallow fatty acid;
• x is 2 or 3;
• y and z are individually selected from 0 or 1;
• x+y+z=3, R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60, R.sup.3 and R.sup.4 can be the same or different and are individually selected from the group consisting of C.sub.1 -C.sub.6 alkyl groups --(R.sup.5 O).sub.n H groups wherein R.sup.5 and n are as defined above, and --R.sup.6 --N--R.sup.7 R.sup.8 groups wherein R.sup.6 is a C.sub.1 to C.sub.6 linear or branched alkylene group, and R.sup.7 and R.sup.8 can be the same or different and are individually selected from the group consisting of R.sup.3, R.sup.4 and (R.sup.1 --COO--R.sup.2)-- groups wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined above.

A fuel composition for reducing combustion chamber and intake valve deposits comprising:

• a major amount of a hydrocarbon fuel;
• and
• an effective combustion chamber and intake valve deposit-controlling amount of an additive, the additive consisting essentially of at least one esteramine of the formula:
• ##STR8## wherein R.sup.1 is a straight chain C.sub.7 -C.sub.21 hydrocarbon group;
• x is 2;
• y and z are individually selected from 0 or 1;
• x+y+z=3, R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60, R.sup.3 and R.sup.4 can be the same or different and are individually selected from the group consisting of C.sub.1 -C.sub.6 alkyl groups and --(R.sup.5 O).sub.n H groups wherein R.sup.5 and n are as defined above.

A fuel composition for reducing combustion chamber and intake valve deposits comprising:

• a major amount of a hydrocarbon fuel;
• and
• an effective combustion chamber and intake valve deposit-controlling amount of an additive, the additive consisting essentially of at least one diesteramine of the formula:
• ##STR9## wherein R.sup.1 is a C.sub.7 -C.sub.21 hydrocarbon group;
• R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60, R.sup.3 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl groups and --(R.sup.5 O).sub.n H groups.

A fuel composition for reducing combustion chamber and intake valve deposits comprising:

• a major amount of a hydrocarbon fuel;
• and
• an effective combustion chamber and intake valve deposit-controlling amount of at least one triesteramine of the formula:
• ##STR10## wherein R.sup.1 is a C.sub.7 -C.sub.21 hydrocarbon group;
• R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60.

A fuel composition for reducing combustion chamber and intake valve deposits comprising:

• a major amount of a hydrocarbon fuel;
• and
• an effective combustion chamber and intake valve deposit-controlling amount of at least one tetraesterdiamine of the formula:
• ##STR11## wherein R.sup.1 is a C.sub.7 -C.sub.21 hydrocarbon group;
• R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60 and R.sup.6 is a C.sub.1 -C.sub.6 linear or branched alkylene group.

A fuel composition for reducing combustion chamber and intake valve deposits comprising:

• a major amount of hydrocarbon fuel, and
• an effective combustion chamber and intake valve deposit-controlling amount of at least one esterdiamine of the formula:
• ##STR12## wherein R.sup.1 is a C.sub.7 -C.sub.21 hydrocarbon group;
• R.sup.2 is selected from the group consisting of C.sub.1 -C.sub.6 alkylene groups and --(R.sup.5 O).sub.n R.sup.5 -- groups wherein each R.sup.5 can be the same or different and is independently selected from the group consisting of linear or branched C.sub.1 -C.sub.6 alkylene groups and n is 1 to 60 and R.sup.6 is a C.sub.1 to C.sub.6 linear or branched alkylene group;
• and
• R.sup.7 is selected from the group consisting of C.sub.1-C.sub.6 alkyl groups, --(R.sup.5 O).sub.n H groups where R.sup.5 and n are as defined above and (R.sup.1 C(O)OR.sup.2)-- groups where R.sup.1 and R.sup.2 are as defined above.