Field of the invention
[0001] This invention relates to a modified lubrication oil, and more specifically to an organometallic compound of iron that is used in combination with lubrication oil for a high pressure fuel injection pump.
Background of the invention
[0002] CN101375027A describes an invention that relates to a method of improving an engine equipped with an exhaust line fitted with a particulate filter, in which the particulates contained in the exhaust gas are trapped on the filter, and the trapped particulates are periodically burnt off. The method is characterized in that, for the purpose of catalysing the combustion of the particles, a composition resulting from mixing a lubricating oil with a colloidal dispersion is blended into engine-lubricating composition, which dispersion comprises particles (nanoparticles of iron) of a compound of at least one rare earth and an amphiphilic agent.
Detailed description of the embodiments
[0003] A modified lubrication oil is described. The modified lubrication oil comprises an organometallic / chemical additive, the additive comprising one of an iron colloidal suspension and an organometallic compound of iron.
[0004] In an exemplary embodiment, lubrication oil is channeled into a high pressure fuel injection pump to facilitate lubricating the internal mechanical components of the high pressure fuel injection pump. While lubrication oil is being channeled into the high pressure fuel injection pump, fuel is also being delivered from the high pressure fuel injection pump to a high pressure common rail, before it is delivered to a fuel injector. When the fuel is being channeled into the high pressure fuel injection pump, a very small portion of the lubrication oil (<5 ppm) is mixed with the fuel before the fuel and lubrication oil mixture is delivered to the high pressure common rail. This

concept is taken advantage of for mixing a small quantity of an organometallic additive of iron with the lubrication oil, before the modified lubrication oil mixture is allowed to mix with the fuel in the high pressure fuel injection pump.
[0005] In an exemplary embodiment, the additive that is used in combination with the lubrication oil may be a iron based material. In an alternate exemplary embodiment, the additive that is used in combination with the lubrication oil is an organometallic compound of iron. When the iron based material or the organometallic compound of iron is added to the lubrication oil of the high pressure fuel injection pump, an iron colloidal suspension is formed. Iron in colloidal form gets highly dispersed in the oil media and is subsequently is mixed with the fuel as a result of the high pressure fuel pump operation.
[0006] By virtue of the pump operation, oil containing organometallic iron species is sucked into the system and the combination is delivered from the high pressure fuel pump to the fuel injector and eventually gets into the combustion chamber of the engine. When the additive is mixed / mixed to the lubrication oil, the modified lubrication oil is allowed to flow into the high pressure fuel injection pump. In the high pressure fuel injection pump, a small quantity of the additive that is added to the lubrication oil is mixed with the fuel, and the combination is delivered from the high pressure fuel injection pump to the fuel injector. In an alternate exemplary embodiment, the additive is dosed into the fuel in a fuel tank of a vehicle directly before the combination of the additive that is dosed into the fuel is channeled to the high pressure fuel injection pump. The combination of the small quantity of the additive that is added to the lubrication oil and mixed with the fuel is known as a fuel borne catalyst. The fuel borne catalyst is known to trigger soot burning at low temperatures. For high activity soot oxidation, the fuel borne catalyst nanoparticle size control is a crucial parameter. The smaller size of the fuel borne catalyst nanoparticle

size reduces the fuel borne catalyst treat rate in the fuel and consequently lowers ash accumulation in the selective catalytic reactor.
[0007] From the fuel injector, the combination of the small quantity of the additive that is added to the lubrication oil and mixed with the fuel is injected into an engine cylinder. During the combustion that occurs in the engine cylinder, the fuel borne catalyst is not combusted. The exhaust gases containing traces of the fuel borne catalyst is channeled from the exhaust gas flow path to a selective catalytic reactor. In the selective catalytic reactor, the fuel borne catalyst reduces a temperature for which the combustion of the exhaust gas is required to occur. Due to the reduction in the temperature at which the combustion of the exhaust gas occurs, the exhaust gas is combusted completely in the selective catalytic reactor.
[0008] It must be understood that the embodiments explained above are only illustrative and do not limit the scope of the disclosure. Many modifications in the embodiments with regard to dimensions of various components are envisaged and form a part of this invention. The scope of the invention is only limited by the scope of the claims.

CLAIMS
We Claim
1. A modified lubrication oil, the modified lubrication oil comprising an additive, said additive comprising one of an iron colloidal suspension and an organometallic compound of iron.