Claims:We claim:
1. A high pressure fuel pump, said high pressure fuel pump comprising:
a housing; and
a control rod assembly 10, said control rod assembly 10 comprising:
a control rod 12 that comprises a first end 14 and an opposite second end 16, said first end 14 and said opposite second end 16 coupled to said housing of said high pressure fuel pump; and
at least one control sleeve 18, a first end of said at least one control sleeve 18 coupled to a plunger of said high pressure fuel pump;
at least one slot 20 defined on said control rod 12, said at least one slot 20 adapted to receive an opposite second end of said at least one control sleeve 18 therein, and wherein a translation of the control rod assembly 10 causes a rotation of said plunger of said high pressure fuel pump.

2. The high pressure fuel pump in accordance with Claim 1 wherein said at least one control sleeve 18 comprises a pin 22, a lever 24 integrated with said pin 22, and a body 26 integrated with said lever 24.

3. The high pressure fuel pump in accordance with Claim 2 wherein said pin 22 is inserted within said at least one slot 20 defined on said control rod 12, said pin 22 fastened within said at least one slot 20 defined on said control rod 12.

4. A control rod assembly 10 for a high pressure fuel pump, said control rod assembly 10 comprising:
a control rod 12; and
at least one control sleeve 18;
at least one slot 20 defined on said control rod 12, said at least one slot 20 adapted to receive said at least one control sleeve 18 therein.

5. The control rod assembly 10 for a high pressure fuel pump in accordance with Claim 4 wherein said at least one control sleeve 18 comprises a pin 22, a lever 24 integrated with said pin 22, and a body 26 integrated with said lever 24.
6. The control rod assembly 10 for a high pressure fuel pump in accordance with Claim 5 wherein said pin 22 is inserted within said at least one groove 20 defined on said control rod 12, said pin 22 fastened within said at least one groove 20 defined on said control rod 12. , Description:Field of the invention:
[0001] This disclosure relates to a control rod assembly for a high pressure fuel pump.

Background of the invention:
[0002] U.S. Patent Number 4512305A describes a delivery-regulation unit for in-line injection pumps arranged with parallel axes in an engine bed, particularly for multi-cylinder diesel engines, comprising a reciprocating rod arranged adjacent to individual injection pump, and pump governor means for each of the injection pumps, the pump governor means each comprising a rack slidably supported by the respective injection pump outside thereof and substantially tangentially thereto for controlling fuel injection thereof, wherein the control rod has slots adjacent to the injection pumps and each rack is connected to a respective one of the slots by a swivel joint means to allow adjustment of the pumps individually by angular displacement thereof about their axes.

Brief description of the accompanying drawing:
[0003] An embodiment of the disclosure is described with reference to the following accompanying drawing:
[0004] Figure 1 illustrates a control rod coupled to a control sleeve assembly.

Detailed description of the embodiment:
[0005] Figure 1 illustrates a control rod 12 that is coupled to a plurality of control sleeves 18. A high pressure fuel pump is described. The high pressure fuel pump comprises a housing and a control rod assembly 10. The control rod assembly 10 comprises a control rod 12 that comprises a first end 14 and an opposite second end 16, the first end 14 and the opposite second end 16 coupled to the housing of the high pressure fuel pump. At least one control sleeve 18, a first end of the at least one control sleeve 18 coupled to a plunger of the high pressure fuel pump. At least one slot 20 is defined on the control rod 12, the at least one slot 20 adapted to receive an opposite second end of the at least one control sleeve 18 therein, and wherein a translation of the control rod assembly 10 causes a rotation of the plunger of the high pressure fuel pump.

[0006] Moreover, a control rod assembly 10 for a high pressure fuel pump is described. The control rod assembly 10 comprises a control rod 12, and at least one control sleeve 18. At least one slot 20 is defined on the control rod 12, the at least one slot 20 adapted to receive the at least one control sleeve 18 therein.

[0007] The control rod 12 comprises a first end 14 and an opposite second end 16. The first end 14 of the control rod 12 is coupled to a governor, wherein the governor facilitates translating the control rod 12 to facilitate varying a quantity of fuel delivered from the high pressure fuel pump. A plurality of slots 20 are defined in the control rod 12. A plurality of control sleeves 18 are inserted within the plurality of slots 20 that are defined in the control rod 12 as will be explained in more detail below.

[0008] Each of the plurality of control sleeves 18 includes a body 26, a first end of which is coupled to a plunger of the high pressure fuel pump. The rotation of the body 26 of each of the control sleeves 18 causes a rotation of each plunger of the high pressure fuel pump. The rotation of each plunger of the high pressure fuel pump in turn controls the quantity of fuel that flows into the high pressure fuel pump. The opposite second end of the body 26 of each of the control sleeves 18 is integrated with a lever 24. The lever 24 rotates about a vertical axis when the control rod 12 is translated by the governor. A pin 22 is integrated with the lever 24, and inserted within each of the plurality of slots 20 that are defined on the control rod 12. The pin 22 is fastened within each of the plurality of slots 20 defined on the control rod 12 using any fastening means known in the art.

[0009] The working of the control rod 12 that is coupled to each of the plurality of control sleeves 18 is described as an example. When the governor translates the control rod 12, the translation of the control rod 12 causes the lever 24 to rotate about its vertical axis. The rotation of the lever 24 about its vertical axis causes the piston that is coupled to the end of the body 26 of the control sleeve 18 to rotate. The rotation of the piston of the high pressure fuel pump causes the fuel inlet position to vary, thereby varying the quantity of fuel that is channeled to the pumping chamber of the high pressure fuel pump.

[0010] 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.