Claims:We Claim:
1. A filter (101) for an engine (105); said filter (101) comprising,
a filter head (101a) connected a fuel tank (102);
a banjo connector (103) located in between said filter head (101a) and said fuel tank (102);
characterized in that:
a filter element (103a) disposed in the banjo connector (103), such that the fuel flowing to the filter head (101a) is pre-filtered by the filter element (103a).

2. The filter (101) as claimed in claim 1, wherein said filter element (103a) is a strainer.

3. The filter (101) as claimed in claim 1, wherein said banjo connector (103) has a thread portion to accommodate a threaded portion of said filter element (103a).

4. The filter (101) as claimed in claim 1, wherein said filter head (101a) has a threaded portion to accommodate the threaded portion of said banjo connector (103).

5. The filter (101) as claimed in claim 1, wherein said fuel tank (102) is connected to said banjo connector (103) by a connector.
, 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 filter for an engine.

Background of the invention
[0002] The filter in the fuel line screens out dirt and dust particles from the fuel. The filter is normally made into cartridges containing a filter paper. These dust particles if not removed, causes rapid wear and failure of fuel pump and injectors, due to abrasive action of the particles on the high precision components used in modern injection systems. Fuel filter improves the performance of the engine. The system becomes more efficient when there is less contamination as less effort is required to burn these contamination. Filters are services in regular intervals to avoid the damages.

[0003] The patent application US5215655A discloses a dispenser interlock fuel filter system disabled in response to filter removal. A liquid fuel filter system used for fuel dispensing stations includes a ball valve assembly and replaceable strainer cartridge permitting strainer cartridge replacement even when the fuel pump is activated. The ball valve assembly seals the inlet port of the filter housing thereby disabling the flow of fuel through the housing when the strainer cartridge or filter housing cap are removed. A check valve prevents fuel from flowing back thorough the filter system outlet port into the filter housing. A pressure valve disposed in the check valve prevents possible harmful pressure build up.
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 system layout according to an embodiment in the invention; and
[0006] FIG. 2 illustrates a view of a banjo connector according to an embodiment in the invention.

Detailed description of the embodiments
[0007] Figure 1 shows the system layout of a common rail system comprising a filter and an engine in accordance to an embodiment in the invention. The filter 101 comprises a filter head 101a connected a fuel tank 102 and a banjo connector 103 located in between the filter head 101a and the fuel tank 102. The filter 101 comprises a filter element 103a disposed in the banjo connector 103, such that the fuel flowing to the filter head 101a is pre-filtered by the filter element 103a. The fuel flows from the fuel tank 102 to filter 101 and then to the engine 105 via pump 104.

[0008] In the above-disclosed disclosure, the fuel from the fuel tank 102 is pre-filtered before it enters the filter 101. The fuel from the fuel tank 102 flows to the filter head 101a via a banjo connector 103 and pre-filtered by a filter element 103a and then flows into the pump 104 and then to the engine 105 for fuel injection.
[0009] According to an embodiment of the disclosure, in the filter 101, the filter element 103a is a strainer. The filter element 103a is not restricted to strainer, but to any component that is used to filter the fuel as known to the person skilled in the art.

[0010] In the filter 101, the banjo connector 103 has a thread portion to accommodate the threaded portion of a filter element 103a. As shown in figure 2, the banjo connector 103 is a hollow bolt used for high pressure fluid transfer having two ends 103d and 103e. One end of the two ends is connected to a filter head 101a and the other end is connected to a fuel tank 102. One end 103e of the hollow bolt 103 has the threaded portion so that it can accommodate any component and also is accommodated by other components. In the above-disclosed disclosure, the threaded portion of banjo connector 103 accommodates the filter element 103a so that the banjo connector 103 and the filter element 103a are assembled as one unit. Here the filter element 103a is threaded to the hollow bolt via threaded portion.

[0011] In the filter 101, the filter head 101a has a threaded portion to accommodate the threaded portion of the banjo connector 103. So the outer surface of the hollow bolt 103e is threaded inside the filter head 101a. According to disclosure disclosed above, firstly, the banjo connector 103 accommodates the filter element 103a and secondly the filter head 101a accommodates the unit of banjo connector 103 and filter element 103a.

[0012] According to an embodiment of the disclosure, the fuel tank 102 is connected to the banjo connector 103 by a connector for example a quick fit connector. The quick fit connector is fitted at the one end of the banjo connector 103 in such a way that the fuel flows from the fuel tank 102 to the filter head 101a and then to the filter element 103a. The quick fit connector facilitates the removal of the filter element 103a during the service of the filter 101.

[0013] In accordance with the embodiment of the disclosure, the filter element 103a has a strip 103b which has an arrangement that during servicing, the strip 103b pulls the filter element 103a and then the filter element 103a is removed or replaced based upon the condition during servicing.

[0014] in the disclosure disclosed above, the fuel is pumped from the fuel filter 101 to the fuel pump. Before entering the filter 101, the fuel is pre filtered by a filter element 103a to remove the dust particles at the entry level so to enhance the life of filter101. The filter element 103a can be replaced based on its clogging condition and based on the presence of dust particles.

[0015] By using this filter element 103a in fuel filter 101 at the entry level, the bigger particles are arrested that helps in increasing the life of the filter 101 and avoid the early choke and clogging of filter 101. This filter element 103a is serviceable and can be easily replaceable at the time of service. Replacement of the filter element 103a is also based on if the strainer rusted or it is completely filled with the particles.

[0016] ‘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

[0017] 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.