Claims:We Claim:
1. An oil pump (100), said oil pump located downstream from an oil tank (102), and comprises a first flow path (104) in flow connection with a fuel injection pump (106); characterized in that
a second flow path (108) connected to said oil pump (100), said second flow path (108) in flow communication with an engine (110).
2. The oil pump (100) of claim 1, wherein said oil pump 100 integrated with said fuel injection pump 106.
3. The oil pump (100) of claim 1, wherein said oil pump (100) is attached to said fuel injection pump (106).
4. The oil pump (100) of claim, wherein said engine receives oil from at least a third flow path 111, said third flow path 111 in flow communication with said oil tank 102. , Description:Field of the invention
[0001] This invention relates to the field oil pump used for lubrication in a fuel injection system.
Background of the invention
[0002] An oil pump is used to lubricate components of a fuel injection pump. Oil from the oil tank flows through the oil pump and returns back to the oil tank after lubrication. In addition to fuel injection pump, the components of the engine also require lubrication. A pump, in addition to the existing oil pump lubricates the components of the engine. There is need to simplify the lubrication circuit in a fuel injection system, to enhance flow of oil in fuel injection system.
Brief description of the accompanying drawing
[0003] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawing:
[0004] FIG. 1 illustrates an oil pump in a fuel injection system; and
[0005] FIG. 2 illustrates an embodiment oil pump in a fuel injection system.
Detailed description of the embodiments
[0006] FIG. 1 illustrates an oil pump 100 in a fuel injection system. The oil pump 100 is located downstream from an oil tank 102, and comprises a first flow path 104 in flow connection with a fuel injection pump 106. A second flow path 108 is connected to the oil pump 100, the second flow path 108 is in flow communication with an engine 110. In an embodiment oil pump 100 and fuel injection pump 106 are integrated.
[0007] The working of the oil pump 100 will be described in further detail. The oil pump 100 receives oil from an oil tank 102, once the oil enters the oil pump 100, the oil flows through a first flow path 104 to reach the fuel injection pump 106. The second flow path 108 is connected to the oil pump 100. The second flow path 108 is in flow communication with an engine 110. The oil from the second flow path 108, lubricates the components of the engine 110, and flows back to the oil tank 102.
[0008] The oil pump 100 may be an electric oil pump 100 and is controlled by an electronic control unit. The oil pump 100 is therefore a variable oil pump 100. A variable oil pump 100 is one in which the quantity of oil supplied to the components of the fuel injection pump 106 or the engine 110 can be varied according to the demand. The oil pump 100 supplies lubrication oil to engine 110 parts and also lubrication to the components of fuel injection pump 106 through the first flow path 104 and second flow path 108 respectively. After lubrication, both paths that is the first flow path 104 and the second flow path 108 return to the oil tank 102 through flow paths 109 and 107 respectively. A drive chamber of the fuel pump lubricated by oil through path. The fuel path starts with the fuel tank which also houses the electric feed pump for the fuel. The feed pump is controlled through the electronic control unit, to meter fuel to the inlet of the fuel pump. The fuel injection pump 106 pressurizes the fuel in the pressurization chamber which is a combination of housing/barrel and a plunger, the plunger having a reciprocating motion driven by the cam. The pressurized fuel is then supplied to the rail through the outlet valve. From the rail the pressurized fuel is sent to the injectors which inject fuel to the engine 110 cylinders as commanded by the ECU.
[0009] FIG. 2 illustrates an embodiment oil pump in a fuel injection system. The engine 110 receives oil from at least a third flow path 111, the third flow path 111 is in flow communication with the oil tank (102). In this case, the oil pump (100) functions like a variable oil pump, in other words based on the demand the oil pump supplies oil to the engine 110, while the oil tank 102 supplies oil during the normal working condition of the engine 110.
[0010] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention in terms of type of oil pump used. 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.