Claims:We Claim:
1. A suction valve holder 100 for a fuel injection pump, said suction valve holder 100 comprising atleast a pair of first flow path 102 in flow communication with an inlet path of said fuel injection pump, characterized in that:

at least a pair of second flow path 104 located in said suction valve holder 100, said second flow path 104 adapted to receive fuel from said inlet path.

2. The suction valve holder 100 of claim 1, wherein said second flow path 104 is in flow communication said inlet path.
, Description:Field of the invention
[0001] This invention relates to the field of a fuel injection pump.

Background of the invention
[0002] In a fuel injection pump the plunger moves from a bottom dead center to a top dead center, during compression of fuel, the pressurized fuel closes the inlet/outlet valve and opens the delivery valve. During the closure of suction valve, the leakage flow of fuel in the suction valve leads to the sudden pressure surge. This pressure surge moves downwards from the inlet/outlet valve. As the pressure wave moves further downstream from the valve, it creates a negative pressure below the valve. If this negative pressure reaches the vapor pressure of the fuel, it may lead to the creation of cavity bubbles. As the positive pressure reflects back, it implodes the bubbles onto the valve. This continues for every cycle of the pump. Each cycle results in the release of high energy pressure wave onto the valve body due to bubble implosion. This may lead to cavitation erosion in the inlet/outlet valve body. Valves may be prone to acoustic cavitation especially in fuel pumps, requiring higher speeds and pressure. This leads to the erosion of the material in the valve body of the fuel injection pump.

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 a suction valve holder for a fuel injection pump.

Detailed description of the embodiments
[0005] FIG. 1 illustrates a suction valve holder 100 for a fuel injection pump. The suction valve holder 100 comprises atleast a pair of first flow path 102 in flow communication with an inlet path of the fuel injection pump. A second flow path 104 is located in the suction valve holder 100. The second flow path 104 is adapted to receive fuel from the inlet path.
[0006] The construction of the suction valve holder 100 will be explained in further detail. The suction valve holder 100 is adapted to receive fuel from the low pressure line via the inlet path, the fuel received in the suction valve holder 100 flows into the pressurizing chamber of the fuel injection pump via the first flow path 102. A second flow path 104 is located in the suction valve holder 100. The second flow path 104 is an additional flow path to the first flow path 102. The suction valve holder 100 is located in between the delivery valve holder and the plunger barrel of the fuel injection pump.
[0007] When the inlet valve of the fuel injection pump is closed, the fuel is pressurized in the pressurizing chamber of the fuel injection pump. Cavitation bubbles are formed when the pressure of fuel reaches the vapor pressure. Simultaneously high pressure waves travels downstream and reflects back to implode the bubbles on to the suction valve holder 100. Thus cavitation erosion is formed in the suction valve holder 100.
[0008] The second flow path 104 along with the first flow path 102 aids in reducing the pressure drop between the inlet and outlet valve. The position of these flow paths leads to slightly increased pressure below the inlet/ outlet valve. In addition, the position of the flow paths also leads to dampening the pressure fluctuations below the inlet/ outlet valve. The pair of second flow path 104 along with the inlet path aids in reducing the pressure drop between the inlet and outlet of inlet/ outlet valve of the fuel injection pump. The position of the first flow path 102 and the second flow path 104 leads to increased pressure below the inlet/outlet valve. In addition, the second flow path 104 also leads to dampening of the pressure fluctuations below the inlet/outlet valve due to lower pressure drop and resulting slightly higher pressure below the inlet/outlet valve.
[0009] 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 profile of the flow path. 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.