Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
  • B60K15/01—Arrangement of fuel conduits

Definitions

• This invention relates to a shutoff valve which automatically blocks fluid flow from a fluid tank in response to the absence of any demand for fluid from the tank.
• a fuel flow shutoff valve which shifts to an open position in response to a demand for fluid from the tank and automatically shifts to a closed position in response to the absence of a positive demand for fluid from the tank.
• the fluid flow shutoff valve includes a valve spool slidably positioned within a bore of a body and movable between a first position at which an inlet port is blocked from communi cation with an outlet port and a second, position at which the inlet port is in communication with the outlet port.
• a passage connects the outlet port to a first chamber positioned at one end of nhe spool while a pressure port is connected to a second chamber at the opposite end of the valve spool.
• a spring resiliently urges the valve spool to the first position and has sufficient resiliency to be overcome by the force exerted on the valve spool in response to a partial vacuum being created in the first chamber.
• the sole figure is a diagrammatic sectional view of an embodiment of the present invention depicted in a fluid system.
• a fluid system is generally indicated by the reference numeral 10 and includes a fluid tank 11, a pump 12 connected to draw fluid from the tank 11, a fluid flow shutoff valve 13 positioned between the fluid tank 11 and the intake of pump 12, and a work system 14 connected to the discharge side of pump 12.
• the work system 14 can be a fuel system for delivering fuel to an engine and fluid tank 11 can be a fuel tank for supplying fuel to the fuel system.
• the fuel flow shutoff valve 13 includes a body 16 having a bore 17 and an inlet port 18 and an outlet port 19 communicating with the bore.
• the inlet port 18 is connected to fluid tank 11 and outlet port 19 is connected to the intake side of pump 12.
• a valve spool 21 is slidably positioned within bore 17 and has an annular groove 22 provided thereon. Valve spool 21 is movable between a first position at which inlet port 18 is blocked from communication with outlet port 19 by valve spool 21 and a second position at which, inlet port 18 is in communication with outlet port 19 via annular groove 22.
• First and second chambers 23, 24 are provided in bore 17 at opposite ends of. valve spool 21.
• a passage 26 connects outlet .port 19 to first chamber 23.
• a pressure port 27 is connected to second chamber 24 and to a pilot line 28 connected to the discharge or pressure side of pump 12 between pump 12 and work system 14.
• a means, for example, a compression spring 29 positioned within first chamber 23 is provided for resilently urging valve spool 21 to the first position.
• Compression spring 29 has sufficient resiliency to be overcome by the force exerted on valve spool 21 in response to a partial vacuum of a preselected value being created in first chamber 23 by pump 12.
• valve spool 21 In use when pump 12 is not being driven, valve spool 21 will be resilently urged to the first position as shown in the drawing by spring 29.
• a partial vacuum is created in outlet port 19, passage 26, and first chamber 23.
• the partial vacuum in first chamber 23 causes a force to be exerted on valve spool 21 and when the vacuum reaches a preselected value the force acting on the valve spool overcomes the resiliency of spring 29 causing valve spool 21 to be moved to the second position.
• fluid is drawn from fluid tank 11 by pump 12 and directed to work system 14.
• pressurized fluid is also delivered through pilot line 28, pressure port 27 and into second chamber 24 where it then holds valve spool 21 at the second position as long as pump 12 is driven.
• spring 29 will automatically return valve spool 21 to the first position again blocking fluid flow from fluid tank 11.
• shutoff valve will operate automatically to stop fluid flow from fluid tank 11 in response to an absence of a positive demand for fluid from the tank.
• the shutoff valve is of simple construction and can be manufactured in convenient sizes economically.

Landscapes

• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Safety Valves (AREA)
• Multiple-Way Valves (AREA)
• Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22147493

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (1)

Citations (3)

• 1979
  • 1979-01-29 JP JP50140079A patent/JPS56500025A/ja active Pending
  • 1979-01-29 WO PCT/US1979/000044 patent/WO1980001552A1/en unknown
  • 1979-01-29 GB GB8018001A patent/GB2049114B/en not_active Expired

Patent Citations (3)

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