Claims:We Claim:
1. A device (100) for flushing fuel from a fuel injection pump, said device 100 comprising:
a casing (102) comprising an inlet flow path (104) adapted to receive fuel from an outlet of said fuel injection pump, and at least one outlet flow path (106);

a spring actuated valve (108) located at a first end of said inlet flow path 104, said first end located away from said fuel injection pump; and

at least one outlet flow path (106) proximal to said first end of inlet flow path 104, said spring actuated valve (108) adapted to fluidly connect said inlet flow path 104 and said outlet flow path 106 in dependence of pressure of said fuel.

2. The device 100 of claim 1, wherein said device 100 is hand held.
, Description:Field of the invention
[0001]This invention relates to a device for flushing fuel from a fuel injection pump.

Background of the invention
[0002]In a fuel injection pump that supplies high pressure fuel to an engine cylinder, there exists a possibility of particles in fuel getting trapped close to the inlet or the outlet valve region of the fuel injection pump. Since the fuel injection pumps is mounted on the engine, the fuel injection pump needs to be detached from the engine, and then the particles need to be flushed out. Since, the above process of detaching a fuel injection pump from the engine is complex and time consuming there is need for removing the particles present in the fuel, without detaching the fuel injection pump from the engine.

[0003]Prior art patent application DE10036939 discloses a flushing valve for a high pressure pump comprises a valve body mounted on a spring in its own mounting. A first throttle channel is positioned in front of the valve body in its direction of opening. All these components are mounted in a sleeve. A spiral groove on the outside of the sleeve acts as a second throttle channel connected in parallel with the first.

Brief description of the accompanying drawing
[0004] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawing:

[0005] FIG. 1 illustrates a device for flushing fuel from a fuel injection pump.

Detailed description of the embodiments
[0006] FIG. 1 illustrates a device 100 for flushing fuel from a fuel injection pump. The device 100 comprises a casing 102 with an inlet flow path 104 adapted to receive fuel from an outlet of the fuel injection pump, and at least one outlet flow path 106 and a spring actuated valve located at a first end of the inlet flow path 104, the first end is located away from the fuel injection pump. The outlet flow path 106 is proximal to the first end of inlet flow path 104. The spring actuated valve is adapted to fluidly connect the inlet flow path 104 and the outlet flow path 106 in dependence of pressure of the fuel. In an embodiment the device 100 may be hand held.

[0007]The construction of the device 100 will be explained in further detail. The device 100 disclosed herein is used to flush fuel from the fuel injection pump. The device 100 comprises a casing 102. The casing 102 may be in the form of block like structure. The casing 102 comprises an inlet flow path 104 adapted to receive fuel. The inlet flow path 104 receives fuel from the outlet of the fuel injection pump. The outlet of the fuel injection pump comprises a pipe. Fuel from the fuel injection pump flows from the outlet to the inlet flow path 104 via the pipe. The spring actuated valve creates a back pressure along the inlet flow path 104. The spring is designed in such a way that it opens when the fuel pressure exceeds a certain limit. The outlet flow path 106 is proximal to the first end of the inlet flow path 104, the spring actuated valve to fluidly connect said inlet flow path 104 and the outlet flow path 106 in dependence of pressure of the fuel.

[0008]The working of the device 100 will be explained in further detail. The device 100 disclosed herein is used to flush out particles by providing a back pressure of to the high pressure outlet of the pump with the use of spring actuated valve. The high pressure outlet of pump is the part of pump that contains fuel after pressurization in the fuel injection pump. The fuel from the high pressure outlet flows through a pipe and into the inlet flow path 104 of the casing 102. A spring actuated valve located within the casing 102 restricts further flow of the fuel in the casing 102. This restriction creates a back pressure for the fuel along the inlet flow path 104. When the pressure of the fuel exceeds the stiffness of the spring, the valve opens and allows fuel to flow through the outlet flow path 106. The particles that are present in the fuel injection pump, are sucked along with the fuel due to backpressure and are thus removed from the fuel injection pump.

[0009]By using the above mentioned device 100 it is now possible to flush out particles present in the fuel injection pump without removing the fuel injection pump from the engine.

[0010]The back pressure provided by the spring actuated valve ensures effective removal of particles/ contaminants.

[0011] 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 the material of the casing. 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.