US2370249A - Control for electric fuel pumps - Google Patents

Control for electric fuel pumps Download PDF

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Publication number
US2370249A
US2370249A US417726A US41772641A US2370249A US 2370249 A US2370249 A US 2370249A US 417726 A US417726 A US 417726A US 41772641 A US41772641 A US 41772641A US 2370249 A US2370249 A US 2370249A
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Prior art keywords
switch
engine
circuit
fuel pump
electric fuel
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Expired - Lifetime
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US417726A
Inventor
Alfred C Korte
Lannert Kenneth
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Carter Carburetor Corp
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Carter Carburetor Corp
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Priority to US417726A priority Critical patent/US2370249A/en
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Publication of US2370249A publication Critical patent/US2370249A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven
    • F02M2037/085Electric circuits therefor

Description

Feb. 27; 1945.

A. c. KORTE ETAL CONTROL FOR ELECTRIC FUEL PUMPS Filed Nov, 3 19 '1?? ZIIHHHI QIMMHF- INVENTOR ALFRED C. KORTE KENNETH LANN RT 00% ATTORNEY Patented iFeb. 27, 1945- CONTROL FOR ELECTRIC FUEL PUMPS Alfred C. Korte, St. Louis, and Kenneth Lannert,

St. Johns Station, Mo., assignors to Carter Carburetor Corporation tion of Delaware Louis, Mo., 9. corpora- Application November 3, 1941, Serial No. 417,726

1 Claim.

This invention relates to control devices for electrically driven motor vehicle accessories and more particularly to safety switch devices for controlling electrically driven fuel pumps. It is a continuation, in part, of our co-pending application, Serial No. 291,588, filed August-23, 1939.

The present invention has for its primary object the provision of a safety switch device for controlling an electric fuel pump."

It is a further object of the present invention to provide a safety switch device of the above character arranged to be operated by pressure developed by an engine lubricatin oil pump.

It is a further object of the present invention to provide, in combination, with an oil pressure operated switch of the above character a second switch device arranged to co-act with the engine starter switch whereby the electric fuel pump may be energized during the cranking of the engine and before sufficient pressure is built up by the engine lubricating oil pump to close the oil pressure operated safety switch device.

Still another object of the present invention is to provide in series with the above mentioned oil operated switch a second safety switch device responsive to the suction in the engine intake manifold and which is arranged to break the fuel pump circuit when the intake manifold vacuum drops due to engine inoperation.

'Other objects and advantages will become apparent upon reference to the following description and accompanying drawing, referring to which Fig. 1 diagrammatically illustrates one form of the present invention. In this form, a simple battery circuit for driving the electric fuel pump is illustrated and includes, in series, a suction operated switch and a switch which is operated by lubricating oil pressure.

Fig. 2 diagrammatically illustrates a second form of the present invention. In this arrangement, parallel circuits for energizing the electric fuel pump are shown. In one of these circuits is interposed a safety switch device operated by lubricating oil pressure; in the other of these circuits is interposed a switch which is manually operated and arranged to co-act simultaneousl with the engine starting motor switch.

Referring to the arrangement shown in Fig. 1,

numeral l indicates a fuel storage tank having an electrically driven centrifugal type fuel pump 2 mounted therein. Fuel is supplied to the carburetor 5 by pump 2 through discharge pipe 3 and conduit 4. A source of electrical energy for the operation of fuel pump 2 is indicated at 6. The

leads I, 8, 9 and I0 form a battery fuel pump circuit. Interposed in this circuit is a switch device ll having'a spring l2 which normally urges the switch toward a circuit breaking position. The switch device if further comprises a cylinder l3 having a plunger N mounted therein. The cylinder I3 is connected at its upper end by means of conduit l5 to the pressure lubricating system of an internal combustion engine (not shown). Also interposed in the circuit in series with switch H is a second safety switch device, generally indicated at l6? Switch I6 is normally held in a circuit breaking position by spring l1.

Switch device l6 further comprises a cylinder i8 having a plunger l9 mounted therein. The upper end of cylinder [9 is connected to the intake manifold of an internal combustion engine (not shown in this figure) by means of conduit 20.

Also interposed in the fuel pump circuit is a manual switch device, generally indicated at 2|. The operation. of the arrangement shown in Fig. 1 is as follows:

Whenmanual switch 2| is closed and the engine is operating under its own power, sufficient pressure will be developed by the lubricating oil pressure system to force plunger l4 downward and close the switch device ll. Also during operation of the engine the switch device I6 will be closed by reason of intake manifold vacuum.

When the engine is turned off or ceases to operate for any reason,'the fuel pump circuit will be broken at H and IE or if either of these switches, for some unaccountable reason, does not function, the circuit will be broken by the other of the switches.

Referring to the arrangement shown in Fig. 2,

, numeral 2 l a generally indicates an internal combustion engine having a carburetor 5 mounted thereon. A fuel supply tank is generally indicated at I, having an electrically driven centrifugal fuel pump 2 mounted therein for supplying fuel through conduit I4 to the carburetor 5. The engine 2 la is provided with an electrically driven cranking motor indicated at 22 and an engine driven generator indicated at 23. A circuit for energizing the cranking motor 22 is provided and comprises a storage battery 6, and leads 23, 24 and ground leads 25 and 26. Interposed in this circuit is a relay switch device, generally indicated at 21. Switch 21 is electromagnetically operated and includes a solenoid winding 28. An

leads II, II, the switch blade SI and leads 8! and 38.

A circuit for energizing the electric fuel pump 2 is provided and includes the storage battery I, leads I, 34, 3B and ground leads I. and 28. Interposed in this circuit is an oil pressure operated safety switch device, generally indicated at 31. Switch 31 comprises a switch blade 38 for connecting leads 34 and 35. The switch is normally circuit is a manually operated switch device generally indicated at 45. Switch- 45 comprises a switch blade 3| .which is normally held in a circuit breaking position by means of a spring 46.

A by-pass of the switch device 31 is provided and comprises the lead 30 and the switch blade 3i, and lead 41. It will be seen from this that although switch 31 may be in an open position, the fuel pump battery circuit may be closed through the by-pass by closing the manual starter switch 45.

The operating arrangement shown is as follows:

Upon starting an engine, the manual ignition switch, generally indicated at 48 is closed. The circuit for energizing starting motor relay switch 21 is then closed by closing switch 45, thus causing the engine to be cranked. Although the oil pressure may be insuflicient during the cranking period to close switch 31, the fuel pump 2 will, nevertheless, be energized through the by-pass by inFig. 2

- reason of the switch 48 being closed.

As soon astheenginehasbeguntorimimderitsown power, suiilcient lubricating oil pressure will be built up to close switch 81 which will remain closed during all normal operation of the engine. If the engine should, subsequently, become stopped and the manual ignition switch 4| be left closed inadvertently, the fuel pump circuit will, nevertheless, be broken as the oil pressure drops by reason of spring 8|. The by-pass of switch 31 will, of course, be open at all times except during cranking of the engine.

The foregoing description and drawing are intended to be illustrative and not limiting and the exclusive use of all modifications of the present invention within the scope of the appended claim is contemplate.

We claim:

In combination, an internal combustion engine, a pressure lubricating system for said engine, fuel supply means including an electrically driven fuel pump, a starter switch for said engine, said starter switch closing a starting circuit including a source of power, a starting motor, and said electric fuel pump, whereby fuel is supplied said engine during starting operation, a main power circuit for said pump independent of control by said starting switch for continuing operation of said electric fuel pump after said starting switch is opened when said engine starts, said main circuit including a pressure switch, said pressure switch being closed to complete said main circuit by pressure developed when said engine starts, and breaking said main circuit to stop said pump when the pressure developed by said engineis interrupted due to stopping of said engine.

ALFRED C. KORTE. KENNETH LANNERT.

US417726A 1941-11-03 1941-11-03 Control for electric fuel pumps Expired - Lifetime US2370249A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602287A (en) * 1944-04-15 1952-07-08 United Aircraft Corp Starting control system for power plants
US2603697A (en) * 1947-06-17 1952-07-15 Carter Carburetor Corp Automatic safety control and indicator for engines
US2609809A (en) * 1950-09-18 1952-09-09 Bendix Aviat Corp Electric fuel pump control for internal-combustion engines
US2657635A (en) * 1948-06-25 1953-11-03 Thompson Prod Inc Fuel pump and control system
US2665674A (en) * 1950-11-24 1954-01-12 Bendix Aviat Corp Jaw meshing device
US2725867A (en) * 1955-12-06 Steberl
DE950516C (en) * 1952-05-21 1956-10-11 Carter Carburetor Corp Device for monitoring the OElumlaufdruckes and the fuel in internal combustion engines Foerderpumpe
US2771068A (en) * 1953-03-27 1956-11-20 Int Harvester Co Starter-controlled fuel supply for internal combustion engine
US2912595A (en) * 1957-12-06 1959-11-10 Gen Motors Corp Electric fuel pump system
US2949906A (en) * 1958-06-02 1960-08-23 Tokheim Corp Engine control system and apparatus
US2988079A (en) * 1958-10-13 1961-06-13 Robert H Voigt Engine control circuit and switch mechanism
US3028849A (en) * 1960-07-05 1962-04-10 Dickholtz Arthur Automatic fuel shut-off system
US3418991A (en) * 1967-06-12 1968-12-31 Gen Motors Corp Vehicle fuel system
US3459954A (en) * 1965-04-10 1969-08-05 Ero Sgorbani Device for interrupting the flow of electrical current in motor vehicles
US3573482A (en) * 1969-07-10 1971-04-06 Ford Motor Co Electric fuel pump control circuit
US3897771A (en) * 1972-10-07 1975-08-05 Bosch Gmbh Robert Apparatus for the interruption of fuel supply in an internal combustion engine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2725867A (en) * 1955-12-06 Steberl
US2602287A (en) * 1944-04-15 1952-07-08 United Aircraft Corp Starting control system for power plants
US2603697A (en) * 1947-06-17 1952-07-15 Carter Carburetor Corp Automatic safety control and indicator for engines
US2657635A (en) * 1948-06-25 1953-11-03 Thompson Prod Inc Fuel pump and control system
US2609809A (en) * 1950-09-18 1952-09-09 Bendix Aviat Corp Electric fuel pump control for internal-combustion engines
US2665674A (en) * 1950-11-24 1954-01-12 Bendix Aviat Corp Jaw meshing device
DE950516C (en) * 1952-05-21 1956-10-11 Carter Carburetor Corp Device for monitoring the OElumlaufdruckes and the fuel in internal combustion engines Foerderpumpe
US2771068A (en) * 1953-03-27 1956-11-20 Int Harvester Co Starter-controlled fuel supply for internal combustion engine
US2912595A (en) * 1957-12-06 1959-11-10 Gen Motors Corp Electric fuel pump system
US2949906A (en) * 1958-06-02 1960-08-23 Tokheim Corp Engine control system and apparatus
US2988079A (en) * 1958-10-13 1961-06-13 Robert H Voigt Engine control circuit and switch mechanism
US3028849A (en) * 1960-07-05 1962-04-10 Dickholtz Arthur Automatic fuel shut-off system
US3459954A (en) * 1965-04-10 1969-08-05 Ero Sgorbani Device for interrupting the flow of electrical current in motor vehicles
US3418991A (en) * 1967-06-12 1968-12-31 Gen Motors Corp Vehicle fuel system
US3573482A (en) * 1969-07-10 1971-04-06 Ford Motor Co Electric fuel pump control circuit
US3897771A (en) * 1972-10-07 1975-08-05 Bosch Gmbh Robert Apparatus for the interruption of fuel supply in an internal combustion engine

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