US2041422A - Fuel pump for internal combustion engines - Google Patents

Fuel pump for internal combustion engines Download PDF

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Publication number
US2041422A
US2041422A US738700A US73870034A US2041422A US 2041422 A US2041422 A US 2041422A US 738700 A US738700 A US 738700A US 73870034 A US73870034 A US 73870034A US 2041422 A US2041422 A US 2041422A
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cylinder
pump
plunger
internal combustion
combustion engines
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Expired - Lifetime
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US738700A
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L Orange Rudolf
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
    • F02M2700/1317—Fuel pumpo for internal combustion engines
    • F02M2700/1352—Fuel pump with a constant stroke piston without control means

Definitions

  • This invention relates to a feedpump of the kind adapted to supply fuel at greater than'atmospheric pressure to the spray pump of an internalcombustion engine, and its object is to provide simple and eiiicient means for maintaining the supply of the feed pump equal to the fluctuating demands put upon the spray pump.
  • This object is achieved according to the invention by arranging a reciprocating pump plunger within a movable cylinder which is closed by a delivery valve and adapted to be displaced relative to the plunger, in opposition to a spring, by the pressure created by the plunger at the delivery end of an enclosing casing, the cylinder being provided with suction ports which are opened and closed by the plunger and which, on a given displacement of the cylinder in opposition
  • the accompanying drawing represents a yer-" tical section of a pump constructed according to the invention.
  • the illustrated pump comprises a cylinder B which forms a sliding fit with an enclosing, upright casing A.
  • the casing is provided with a fuel inlet K and with an outlet L, the latter being situated immediately above amember H which closes the lower end of the casing andforms apressure chamber under the lower end of the cylinder.
  • the communication of the cylinder with the pressure chamber is controlled by the delivery 'valve F which is supported by a spring G arranged between the valve and the closing member H.
  • the cylinder is provided with suction ports J which are in constant communication .with the inlet K.
  • a reciprocating pump plungerC- is arranged within the cylinder B and acts by alternately opening and closing the suction ports J.
  • the plunger has a head N between which and a shoulder on the cylinder 9.
  • spring D is arranged, which spring acts to produce'the suction stroke of the plunger and also to oppose move-- ment of the cylinder caused by fluid pressure at the pump outlet.
  • the plunger bears against one end of an operating lever M which is rocked by a cam 0 preferably mounted on the shaft of a spray pump to which fuel is supplied by the B.
  • the ports J are closed, and further movement of the plunger results in fuel being forced beyond the delivery valve F into the pressure chamber and thence through the outlet L to the spray pump.
  • the spray pump may be unable to take all the fuel delivered by the plunger C, in which case the pressure in the pressure chamber will increase and. cause the cylinder to be displaced in opposition to the spring D.
  • the plunger At a given displacement. of the cylinder, in opposition to the spring D, the plunger will be ,unable to open the suction ports, and the stroke of the plunger will thus be rendered ineffective.
  • the pump will resume its action. Normally the forces will be balanced so as to maintain the cylinder in a position which ensures the delivery of the correct quantity of fuel to the spray pump.
  • the arrangement has the particular advantage that the clearance space of the pump cylinder can be reduced to a minimum.
  • a fuel pump for intemal-combustion engines comprising a. cylindrical pump casing, a closing member for one end of said casing, the latter having axially spaced, lateral ports one situated near the closing member and serving as an out- .let, the other port serving as an inlet, a pump cylinder arrangedin and forming a sliding fit with said casing, the cylinder having lateral suction ports communicating with the inlet of the casing, stops on said closing member operative to keep the cylinder clear of the outlet of said casing, a spring-controlled delivery valve supported on the closing member and bearing against the end of the cylinder, a reciprocating pump plunger in said cylinder adapted to act by alter-, nately opening and closing the suction ports, a head on said plunger, a cam operated lever arranged to bear against said head for producing the pump stroke of the plunger, and a spring arranged to bear at one end against the plunger head and at the other end against the cylinder for producing the suction stroke, said spring being operative to urge the

Description

y 1936- R. L ORANGE 2,041,422
7 FUEL PUMP FOR INTERNAL COMBUSTION-ENGINES Filed Aug. 6, 1.934
K 1 r l LP Patented May 19, 1936 UNITED STATES FUEL PUMP FOR INTERNAL COMBUSTION ENGINES Rudolf LOrange, Stuttgart-Feuerbach,
' Germany Application August 6, 1934, Serial No. 738,700
Germany August '7, 1933 1 Claim. (Cl. 103-37) This invention relates to a feedpump of the kind adapted to supply fuel at greater than'atmospheric pressure to the spray pump of an internalcombustion engine, and its object is to provide simple and eiiicient means for maintaining the supply of the feed pump equal to the fluctuating demands put upon the spray pump.
This object is achieved according to the invention by arranging a reciprocating pump plunger within a movable cylinder which is closed by a delivery valve and adapted to be displaced relative to the plunger, in opposition to a spring, by the pressure created by the plunger at the delivery end of an enclosing casing, the cylinder being provided with suction ports which are opened and closed by the plunger and which, on a given displacement of the cylinder in opposition The accompanying drawing represents a yer-" tical section of a pump constructed according to the invention.
The illustrated pump comprises a cylinder B which forms a sliding fit with an enclosing, upright casing A. The casing is provided with a fuel inlet K and with an outlet L, the latter being situated immediately above amember H which closes the lower end of the casing andforms apressure chamber under the lower end of the cylinder. The communication of the cylinder with the pressure chamber is controlled by the delivery 'valve F which is supported by a spring G arranged between the valve and the closing member H. The cylinder is provided with suction ports J which are in constant communication .with the inlet K. A reciprocating pump plungerC-is arranged within the cylinder B and acts by alternately opening and closing the suction ports J. The plunger has a head N between which and a shoulder on the cylinder 9. spring D is arranged, which spring acts to produce'the suction stroke of the plunger and also to oppose move-- ment of the cylinder caused by fluid pressure at the pump outlet. The plunger bears against one end of an operating lever M which is rocked by a cam 0 preferably mounted on the shaft of a spray pump to which fuel is supplied by the B. On the plunger 0 being lowered, the ports J are closed, and further movement of the plunger results in fuel being forced beyond the delivery valve F into the pressure chamber and thence through the outlet L to the spray pump. As the action of the latter varies according to the power output of the engine, the spray pump may be unable to take all the fuel delivered by the plunger C, in which case the pressure in the pressure chamber will increase and. cause the cylinder to be displaced in opposition to the spring D. At a given displacement. of the cylinder, in opposition to the spring D, the plunger will be ,unable to open the suction ports, and the stroke of the plunger will thus be rendered ineffective. As soon as the pressure is relieved the pump will resume its action. Normally the forces will be balanced so as to maintain the cylinder in a position which ensures the delivery of the correct quantity of fuel to the spray pump.
. The arrangement has the particular advantage that the clearance space of the pump cylinder can be reduced to a minimum.
It is possible to arrange the cylinder and the casing in a horizontal position, and also in a vertical position with the delivery vali're situated at the top.
I claim:
A fuel pump for intemal-combustion engines, comprising a. cylindrical pump casing, a closing member for one end of said casing, the latter having axially spaced, lateral ports one situated near the closing member and serving as an out- .let, the other port serving as an inlet, a pump cylinder arrangedin and forming a sliding fit with said casing, the cylinder having lateral suction ports communicating with the inlet of the casing, stops on said closing member operative to keep the cylinder clear of the outlet of said casing, a spring-controlled delivery valve supported on the closing member and bearing against the end of the cylinder, a reciprocating pump plunger in said cylinder adapted to act by alter-, nately opening and closing the suction ports, a head on said plunger, a cam operated lever arranged to bear against said head for producing the pump stroke of the plunger, and a spring arranged to bear at one end against the plunger head and at the other end against the cylinder for producing the suction stroke, said spring being operative to urge the cylinder into contact with the stops and to yield to allow the cylinder to be displaced by pressure at the outlet until the suction ports can no longer be opened by the plunger.
' RUDOLF LORANGE.
US738700A 1933-08-07 1934-08-06 Fuel pump for internal combustion engines Expired - Lifetime US2041422A (en)

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Application Number Priority Date Filing Date Title
DE2041422X 1933-08-07

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US2041422A true US2041422A (en) 1936-05-19

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090313A (en) * 1961-04-25 1963-05-21 Weatherhead Co Variable displacement pump
US3130674A (en) * 1961-01-12 1964-04-28 Weatherhead Co Throttling control
US3188964A (en) * 1961-04-17 1965-06-15 Humber Ltd Change speed gear mechanism and pumps therefor
US3262393A (en) * 1963-03-04 1966-07-26 Georgia Tech Res Inst Variable output constant pressure pump
US3273786A (en) * 1963-02-01 1966-09-20 Alwin B Newton Flow regulator for piston-equipped cylinder
US3417702A (en) * 1966-04-18 1968-12-24 Houdaille Industries Inc Constant stroke variable displacement pump
US5261795A (en) * 1989-06-01 1993-11-16 Sedepro Volumetric pump and process for volumetric pumping
EP1496244A1 (en) * 2003-07-10 2005-01-12 MAN B&W Diesel AG An engine with a fuel pump with the ability to purge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130674A (en) * 1961-01-12 1964-04-28 Weatherhead Co Throttling control
US3188964A (en) * 1961-04-17 1965-06-15 Humber Ltd Change speed gear mechanism and pumps therefor
US3090313A (en) * 1961-04-25 1963-05-21 Weatherhead Co Variable displacement pump
US3273786A (en) * 1963-02-01 1966-09-20 Alwin B Newton Flow regulator for piston-equipped cylinder
US3262393A (en) * 1963-03-04 1966-07-26 Georgia Tech Res Inst Variable output constant pressure pump
US3417702A (en) * 1966-04-18 1968-12-24 Houdaille Industries Inc Constant stroke variable displacement pump
US5261795A (en) * 1989-06-01 1993-11-16 Sedepro Volumetric pump and process for volumetric pumping
EP1496244A1 (en) * 2003-07-10 2005-01-12 MAN B&W Diesel AG An engine with a fuel pump with the ability to purge
KR100992056B1 (en) 2003-07-10 2010-11-05 만 디젤 앤 터보 에스이 Engine

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