초록 ▼

A pump system is disclosed for use with a fuel system of an engine. The pump system may have a first pump with a first end, a second end, a reservoir located at the second end, and at least one pump mechanism configured to receive fluid from the reservoir. The pump system may also have a second pump

A pump system is disclosed for use with a fuel system of an engine. The pump system may have a first pump with a first end, a second end, a reservoir located at the second end, and at least one pump mechanism configured to receive fluid from the reservoir. The pump system may also have a second pump mounted to the first pump at the second end and having at least one pump mechanism configured to discharge fluid into the reservoir of the first pump. The pump system may further have a mechanical input operatively connected to the at least one pump mechanism of each of the first and second pumps.

대표청구항 ▼

1. A pump system, comprising: a housing, having a first end and a second end, the housing defining a longitudinal axis;at least one plunger pump mechanism having a plunger disposed within a hollow barrel, the plunger configured for reciprocating motion within the barrel;a jacket mounted to the secon

1. A pump system, comprising: a housing, having a first end and a second end, the housing defining a longitudinal axis;at least one plunger pump mechanism having a plunger disposed within a hollow barrel, the plunger configured for reciprocating motion within the barrel;a jacket mounted to the second end of the housing, the jacket enclosing the at least one plunger pump mechanism and defining a reservoir chamber;a centrifugal pump mounted to the jacket and configured to discharge fluid through a reservoir inlet into the reservoir chamber; anda shaft disposed through the housing along the longitudinal axis, the shaft operatively coupled to the at least one plunger pump mechanism and to the centrifugal pump,wherein at least the jacket defining the reservoir chamber and the centrifugal pump are mounted inside a fluid tank, and wherein an inlet to the centrifugal pump is located opposite the jacket and is open to the fluid tank, and, wherein the centrifugal pump is located gravitationally lower in the fluid tank than the at least one plunger pump mechanism. 2. The pump system of claim 1, further including an electric motor operatively connected to the shaft. 3. The pump system of claim 1, wherein the centrifugal pump is configured having more than one impeller. 4. The pump system of claim 1, further including a high-pressure outlet extending from the at least one plunger pump mechanism out of the fluid tank. 5. The pump system of claim 4 further comprising a socket disposed within an interior volume of the fluid tank, wherein the housing is positioned within the socket so that the jacket defining the reservoir chamber enclosing the at least one plunger pump mechanism and the centrifugal pump are exposed to the interior volume of the fluid tank. 6. The pump system of claim 1, further including a filter disposed at an inlet of the centrifugal pump. 7. The pump system of claim 6 wherein the filter is oriented coaxially with the longitudinal axis about the jacket and the centrifugal pump. 8. The pump system of claim 1 wherein the at least one plunger pump mechanism comprises a plurality of plunger pump mechanisms arranged radially about the longitudinal axis, each of the plurality of plunger pump mechanisms being connected to a manifold, the manifold being mounted to the housing and opposite the reservoir inlet, the manifold joining a discharge from each of the plurality of plunger pump mechanisms. 9. A pump system, comprising: a fluid tank having a socket extending into an interior volume of the fluid tank, the socket having a first end defining an opening and a second end positioned within the interior volume of the fluid tank, the socket further defining a longitudinal axis; a pump assembly partially disposed within the socket, the pump assembly including a housing having a first end positioned proximate to the first end of the socket and a second end positioned proximate to the second end of the socket, a manifold attached to the second end of the housing, a plurality of pump mechanisms attached to the manifold and arranged radially about the longitudinal axis, each of the pump mechanisms including a plunger disposed within a hollow barrel, the plunger configured for reciprocating motion within the barrel, a jacket enclosing said plurality of pump mechanisms and defining a reservoir chamber, the hollow barrel of each of the plurality of pump mechanisms being in fluid communication with the reservoir chamber, and a centrifugal pump having an inlet and an outlet, the outlet of the centrifugal pump being in fluid communication with the reservoir chamber by way of a reservoir inlet, the centrifugal pump being configured to transfer fluid from the fluid tank to the reservoir chamber so that in operation, the fluid pressure in the reservoir chamber is greater than the fluid pressure in the fluid tank; and, a shaft disposed through the housing along the longitudinal axis, the shaft operatively coupled to mechanically drive the plurality of pump mechanism and the centrifugal pump, and an electric motor operatively connected to the shaft outside of the fluid tank proximate to the first end of the housing; and a filter annularly disposed coaxially with the longitudinal axis about the jacket and the centrifugal pump, and extending between the housing and an interior surface of the fluid tank, the filter configured to permit fluid flow between the interior volume the fluid tank and the inlet of the centrifugal pump only through the filter. 10. The pump system of claim 9, further including a fluid outlet extending from the manifold out of the fluid tank, wherein the manifold joins a discharge passage of each of the plurality of pump mechanisms to the fluid outlet. 11. The pump system of claim 9 wherein the centrifugal pump is positioned gravitationally lower in the fluid tank than the plurality of pump mechanisms. 12. A fuel system, comprising: a fuel tank having a socket extending into an interior volume of the fuel tank, the socket defining a longitudinal axis; a pump assembly disposed within the socket, the pump assembly having a housing, a first end of the housing mounted to the fuel tank, a second end of the housing disposed inside the fuel tank, and at least one plunger pump mechanism having a plunger disposed within a hollow barrel, the plunger configured for reciprocating motion within the barrel, a jacket mounted to the second end of the housing, the jacket enclosing the at least one plunger pump mechanism and defining a reservoir chamber, a centrifugal pump mounted to the jacket defining the reservoir chamber and configured to transfer liquid fuel from the interior volume of the fuel tank through a reservoir inlet into the reservoir chamber, and a shaft extending along the longitudinal axis and configured to operatively drive the at least one plunger pump mechanism and the centrifugal pump; a filter annularly disposed coaxially with the longitudinal axis about the jacket and the centrifugal pump, and extending between the housing and an interior surface of the fuel tank, the filter configured to permit fuel flow between the interior volume the fuel tank and an inlet of the centrifugal pump only through the filter; an electric motor operatively connected to the shaft outside of the tank; a vaporizer configured to receive pressurized liquid fuel from the least one plunger pump mechanism and to vaporize the pressurized liquid fuel; an accumulator configured to receive vaporized fuel from the vaporizer; and a regulator located downstream of the accumulator. 13. The fuel system of claim 12 wherein the at least one plunger pump mechanism comprises a plurality of plunger pump mechanisms arranged radially about the longitudinal axis, each of the plurality of plunger pump mechanisms being connected to a manifold mounted to the housing and opposite the reservoir inlet, the manifold joining a discharge from each of the plurality of plunger pump mechanisms. 14. The fuel system of claim 13, further including a fuel outlet extending from the manifold out of the fuel tank. 15. The fuel system of claim 13, wherein the centrifugal pump is positioned gravitationally lower in the fuel tank than the plurality of plunger pump mechanisms.