Claims:I claim:
1. An exhaust charging pump (10) comprising a housing (12), characterized in that:
a first part (14) of said housing (12);
a second part (16) of said housing (12); and
a flexible member (18) coupled circumferentially between said first part (14) of said housing (12) and said second part (16) of said housing (12), said flexible member (18) facilitates varying a volume of said housing (12) of said exhaust charging pump (10).

2. The exhaust charging pump (10) in accordance with Claim 1 further comprising a governor (22) secured to said housing (12) of said exhaust charging pump (10), said governor (22) adapted to vary the volume of said housing (12) of said exhaust charging pump (10).

3. The exhaust charging pump (10) in accordance with Claim 2 wherein said governor (22) is secured to said housing (12) of said exhaust charging pump (10) by means of at least one bolt.

4. The exhaust charging pump (10) in accordance with Claim 2 wherein said governor (22) facilitates displacing said first part (14) of said housing (12) to increase a volume between said first part (14) of said housing (12) and said second part (16) of said housing (12).

5. The exhaust charging pump (10) in accordance with Claim 4 wherein said governor (22) facilitates displacing said first part (14) of said housing (12) by extending said flexible member (18).

6. An exhaust charging pump (10) comprising a housing (12), characterized in that:
a first part (14) of said housing (12);
a second part (16) of said housing (12);
a flexible member (18) coupled circumferentially between said first part (14) of said housing (12) and said second part (16) of said housing (12), said flexible member (18) facilitates varying a volume of said housing (12) of said exhaust charging pump (10); and
a governor (22) secured to said first part (14) of said housing (12), said governor (22) adapted to vary a volume of said housing (12) of said exhaust charging pump (10).

7. The exhaust charging pump (10) in accordance with Claim 6 wherein said governor (22) is secured to said housing (12) of said exhaust charging pump (10) by means of at least one bolt.

8. The exhaust charging pump (10) in accordance with Claim 6 wherein said governor (22) facilitates displacing said first part (14) of said housing (12) to increase a volume between said first part (14) of said housing (12) and said second part (16) of said housing (12).
9. The exhaust charging pump (10) in accordance with Claim 8 wherein said governor (22) facilitates displacing said first part (14) of said housing (12) by extending said flexible member (18).
10. The exhaust charging pump (10) in accordance with Claim 6 wherein said flexible member (18) may be a U-shaped member.
, Description:Field of the invention:
[0001] This disclosure relates to an exhaust charging pump, and more particularly to an exhaust charging pump of a variable geometry.
Background of the invention:
[0002] CN Patent Number 2918805 Y discloses a utility model that relates to an adjustable air pump for the inflation/deflation of an air cushion. The utility model comprises a top cover, a pump, a motor, a blower fan, an air inlet and an air outlet, wherein the motor is arranged at the center part of the pump. The air inlet and outlet are arranged at the lower part of the pump. The inlet and outlet airflow passing through a motor chamber cools the motor. The utility model is characterized in that an air inlet/outlet interface is arranged at the bottom of the pump for air inflation/deflation. When the interface faces against the place of the air inlet, the air pump aerates the air cushion. When the interface faces against the place of the air outlet, the air pump exhausts the air of the air cushion. The utility model has novel structure, convenient operation, long service life, low price and can be easily applied and popularized.

Brief description of the accompanying drawings:
[0003] An embodiment of the disclosure is described with reference to the following accompanying drawing:
[0004] Figure 1 illustrates an exhaust charging pump in accordance with this disclosure.

Detailed description of the embodiments:
[0005] Figure 1 illustrates an exhaust charging pump 10 comprising a housing 12. The housing 12 of the exhaust charging pump 10 comprises a first part 14 of the housing 12 and a second part 16 of the housing 12. A flexible member 18 is circumferentially coupled between the first part 14 of the housing 12 and the second part 16 of the housing 12, the flexible member 18 facilitates varying a volume of the housing 12 of the exhaust charging pump 10.

[0006] Moreover, an exhaust charging pump 10 is described. The exhaust charging pump 10 comprises a housing 12, characterized in that a first part 14 of the housing 12, and a second part 16 of the housing 12. A flexible member 18 is coupled between the first part 14 of the housing 12 and the second part 16 of the housing 12, the flexible member 18 facilitates varying a volume of the housing 12 of the exhaust charging pump 10. A governor 22 is secured to the first part 14 of the housing 12, the governor 22 adapted to vary a volume of the housing 12 of the exhaust charging pump 10. In an embodiment, the governor 22 is a mechanical flywheel governor. Therefore, when a shaft of the mechanical flywheel governor translates, the translation of the shaft facilitates varying the volume of the housing 12 of the exhaust charging pump 10.

[0007] The exhaust charging pump 10 comprises a housing 12. The housing 12 comprises a first part 14 and a second part 16. The first part 14 and the second part 16 of the housing 12 may be independent of each other. The first part 14 of the housing 12 includes an air inlet port 24 and an air exhaust port 26. The air inlet port 24 channels air within the housing 12 of the exhaust charging pump 10, while the air exhaust port 26 channels compressed air out of the housing 12 of the exhaust charging pump 10. The second part 16 of the housing 12 includes an exhaust gas port 28. The exhaust gas port 28 channels exhaust gas within the housing 12 of the exhaust charging pump 10 from an engine that is coupled upstream from the exhaust gas port 28 of the exhaust charging pump 10.

[0008] The exhaust charging pump 10 comprises a flexible member 18. In an embodiment, the flexible member 18 is a U-shaped member. A first side of the U-shaped member is in sealing contact with the first part 14 of the housing 12. A second side of the U-shaped member is in sealing contact with a flexible membrane 30, wherein the flexible membrane 30 is coupled to the second part 16 of the housing 12. The U-shaped member 18 may be circumferentially coupled between the first part 14 of the housing 12 and the second part 16 of the housing 12. The portion between the first side of the U-shaped member and the second side of the U-shaped member may be extendable when a tensile force is applied on the first part 14 of the housing 12. Alternatively, any other flexible member known in the art may be coupled between the first part 14 and the second part 16 which may be extendable when a tensile force is applied on the first part 14 of the housing 12. The flexible membrane 30 may be moved upwardly when exhaust gas is channeled within the housing 12 via the exhaust gas port 28. Specifically, the governor 22 is coupled to the first part 14 of the housing 12 via at least one bolt. Alternatively, the governor 22 is coupled to the first part 14 via any fastening means known in the art.

[0009] A governor 22 is coupled to the housing 12. One end of the governor 22 is coupled to a cam shaft. When the cam shaft rotates, a shaft of the governor 22 moves in the upward direction due to the centrifugal force acting on the governor. Therefore, the first part 14 of the housing 12 is lifted upwardly, thereby causing an extension in the U-shaped member 18. Therefore, a volume within the housing 12 increases, thereby allowing the housing 12 of the exhaust charging pump 10 to deliver more air. When a speed of the cam shaft decreases, the governor 22 moves in the downward direction. Therefore, the first part 14 of the housing 12 moves in the downward direction, thereby decreasing the volume within the housing 12 of the exhaust charging pump 10. Due to a reduction in the volume of the housing 12, the housing 12 of the exhaust charging pump 10 delivers less air.

[00010] The working of the exhaust charging pump 10 is described as an example. Fresh air is channeled into the housing 12 of the exhaust charging pump 10 via the air inlet port 24. When the housing 12 of the exhaust charging pump 10 is filled with fresh air, exhaust gas is channeled into the housing 12 via the exhaust gas port 28. Due to an increase in pressure of exhaust gas within the housing 12, the flexible membrane 30 is lifted upwardly. A valve of the air inlet port 24 is closed, while a valve of the air exhaust port 26 is opened. Therein, due to the pressure of air that is built up within the housing 12 of the exhaust charging pump 10 due to the upward movement of the flexible membrane 30, a valve of the air exhaust port 26 is opened. Therein, pressurized air is channeled out of the exhaust charging pump 12 via the air exhaust port 26.

[00011] When a speed of the engine increases, the cam that is coupled to the governor 22 rotates at an increased speed. Therefore, a shaft of the governor 22 is lifted upwardly due to the centrifugal force acting on the governor. Due to the upward movement of the shaft of the governor 22, the first part 14 of the housing 12 is also lifted upwardly. Therein, the flexible member 18 is stretched in the upward direction. As a consequence, the volume within the housing 12 is increased. Therefore, due to the increased volume within the housing 12, a greater quantity of air can be channeled out of the housing 12 via the air exhaust port 26. The greater quantity of air that is channeled out of the housing 12 allows for improved engine efficiency at higher engine operating speeds.

[00012] When a speed of the engine decreases, the cam that is coupled to the governor 22 rotates at a reduced speed. Therefore, a shaft of the governor 22 moves in a downward direction due to a reduction in the centrifugal force acting on the governor. Due to the downward movement of the shaft of the governor 22, the first part 14 of the housing 12 also moves in a downward direction. Therein, the flexible member 18 is restored to its original position. As a consequence, the volume within the housing 12 is decreased. Therefore, due to the decreased volume within the housing 12, a lesser quantity of air can be channeled out of the housing 12 via the air exhaust port 26. The lesser quantity of air that is channeled out of the housing 12 allows for improved engine efficiency at lower engine operating speeds.

[00013] 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.