Claims:We Claim:
1. A fuel lubricated pump (100) for a fuel injection system, said fuel lubricated pump (100) comprising,
a housing (101) having an inlet (101a) and an outlet (101b);
at least one lubrication channel (102) having two ends;
a first end in flow communication with said inlet (101a) of said housing (101);
a second end in flow communication with at least one component from set of components (103) of said fuel lubricated pump (100).
2. The fuel lubricated pump (100) as claimed in claim 1, wherein said housing (101) is tightened to said fuel lubricated pump (100).

3. The fuel lubricated pump (100) as claimed in claim 1, wherein the fuel flow is directed into said lubrication channel (102) from said inlet (101a) of said housing (101).

4. The fuel lubricated pump (100) as claimed in claim 1, wherein said fuel flow is channeled out from said housing (101) via said outlet (101b)of said housing (101).

5. A fuel injection system (200) comprising,
a tank (201), at least one filter (202), a metering unit (203);
characterized in that
a fuel lubricated pump (100); said fuel lubricated pump (100)comprises:
a housing (101) having an inlet (101a) and an outlet (101b);
at least one lubrication channel (102) having two ends,
a first end in flow communication with said inlet (101a) of said housing (101);
a second end in flow communication with at least one component from set of components (103) of said fuel lubricated pump (100);
at least one flow path (202a) from said at least one filter to said inlet of said housing of fuel lubricated pump;
at least one return flow path (201a) from said outlet (101b) of said housing (101) to said tank (201);

, Description:Complete Specification:
The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001] The invention relates to a fuel lubricated pump for a fuel injection system.

Background of the invention
[0002] Pumps for direct-injection engines such as diesel engines and direct-injection gasoline engines operate at a much higher pressure due to the engine’s specs and are usually mechanical pumps such as common rail radial piston pump, common rail two piston radial, inline pump and metering unit design. Radial piston pumps used in cars and trucks are fuel lubricated, this helps with keeping oil out of the high-pressure fuel. Oil in the fuel can raise emissions and clog injectors.

[0003] A prior art patent application CN204921227U discloses a diesel engine is with improving structure single cylinder high-pressure oil pump assembly. the application includes whole pump cover parts, oil feed metering valve filter screen, oil feed metering valve, pump body parts, end cover, drive shaft, drive shaft axle bush, thrust washer, gyro wheel axle bush, gyro wheel, flange bearing frame, oil blanket, restriction valve parts, oil return bolt and oil feed bolt parts.

Brief description of the accompanying drawings:
[0004] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawings:
[0005] FIG. 1 illustrates a fuel lubricated pump according to an embodiment of the invention; and
[0006] FIG. 2 illustrates a fuel injection system according to an embodiment of the invention.

Detailed description of the embodiments

[0007] Figure 1 illustrates a fuel lubricated pump 100 in accordance to an embodiment of the invention. The fuel lubricated pump 100 for a fuel injection system comprises a housing 101 having an inlet 101a and an outlet 101b and at least one lubrication channel 102 having two ends. A first end in flow communication with the inlet 101a of the housing 101. A second end in flow communication with at least one component from set of components 103 of the fuel-lubricated pump 100.

[0008] Figure 2 illustrates a fuel injection system 200 in accordance with an embodiment of the invention. The fuel injection system 200 is for pumping the required amount of the fuel to a high-pressure rail 204 then to the combustion chamber of the engine through injector 205. The fuel injection system 200 comprises a tank 201, at least one filter 202 and a metering unit 203. The fuel injection system 200 further comprises a fuel-lubricated pump 100. The fuel lubricated pump 100 for a fuel injection system 200 comprises a housing 101 having an inlet 101a and an outlet 101b and at least one lubrication channel 102 having two ends. A first end in flow communication with the inlet 101a of the housing 101. A second end in flow communication with at least one component from set of components 103 of the fuel-lubricated pump 100.

[0009] According to an embodiment of the invention, the fuel injection system 200 comprises at least one flow path 202a from the filter 202 to the inlet 101a of the housing 101 of the fuel lubricated pump 100 and at least one return flow path 201a from the outlet 101b of the housing 101 to the tank 201.

[0010] Here the set of components 103 refers to the components of the fuel lubricated pump 100 for example, cylinder, plunger, roller tappet etc. so the components of the fuel lubricated pump 101 are lubricated from the fuel.

[0011] In the fuel-lubricated pump 100, the housing 101 is tightened to the fuel lubricated pump 100 in such a way that the housing 101 accommodates all the set of components 103 of the fuel lubricated pump 100. Further, in the fuel-lubricated pump 100, the fuel flow is directed into the lubrication channel 102 from the inlet 101a of the housing 101 and fuel flow is channeled out from the housing 101 via the outlet 101b of the housing 101.

[0012] The working of the fuel injection system is described here. The fuel from the tank 201 flows to the filter 202 and then to the fuel lubricated pump 100. The fuel from the filter 202 first flows to the inlet 101a of the housing 101 via a flow path 202a. The fuel enters the lubrication channel 102 from one end and from the other end of the lubrication channel, the fuel lubricates the components of the pump 100. Once the fuel lubricates all the components 103 then due to the gravitational force the fuel flows down to the outlet 101b of the housing 101 and from there to the tank 201 via return flow path 201a.

[0013] By using the fuel lubricated pump the risk of diesel blackening due to mixing of fuel with oil is eliminated. Also the reduction in carbon di oxide emission due to mixing of fuel with oil.

[0014] ‘Adapted’ or ‘arranged’, in the context of the instant disclosure, refers to the technical capability or the technical capacity of a component, in relation to which the term ‘adapted’ or ‘arranged’ is used, to carry out or executed a specified action or actions, upon the requirement of the specified action or actions to be carried out or executed. Moreover, the usage of the term ‘adapted’ or ‘arranged’ here, is in reference with the normal technical capability or technical capacity of the component, imparted by the design or the structure or the composition of the component, and not in reference with any special or extraneous capability or capacity, beyond the scope of the normal technical capability or technical capacity. Therefore, there is a need to address this problem.

[0015] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.