US2555930A - Fuel injection pump for internal-combustion engines - Google Patents

Fuel injection pump for internal-combustion engines Download PDF

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Publication number
US2555930A
US2555930A US91716A US9171649A US2555930A US 2555930 A US2555930 A US 2555930A US 91716 A US91716 A US 91716A US 9171649 A US9171649 A US 9171649A US 2555930 A US2555930 A US 2555930A
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US
United States
Prior art keywords
piston
valve
cylinder
head
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US91716A
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English (en)
Inventor
Palumbo Giuseppe
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Individual
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Individual
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Publication of US2555930A publication Critical patent/US2555930A/en
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Classifications

    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • 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
    • 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
    • F02M59/10—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 characterised by the piston-drive
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve 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
    • 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
    • F02M2700/1388—Fuel pump with control of the piston relative to a fixed cylinder

Definitions

  • FIG.1 PALUMBO FUEL INJECTION PUMP FOR INTERNAL-COMBUSTION ENGINES Filed May 6, 1949
  • FIG.1 PALUMBO FUEL INJECTION PUMP FOR INTERNAL-COMBUSTION ENGINES Filed May 6, 1949
  • This invention relates to improvements in injection pumps for internal combustioirengines, of the valve type as distinguished from slide valve pumps;
  • An object of this invention is to accommodate the valve in the cylinder head and actuate said valve by means of thepiston.
  • A' further object oi this invention is to. cause the valve'toconstantly bear on a boreddisc'which is: slidably' mounted within the piston and? is pressed'by' a spring.
  • Fig. 1 is an axial cross section of a construction of myimproved injection pump, and Fig: 2 shows a detail.
  • I denotes the pump casing
  • 2 is the cylinder in which moves the piston 3 in the form of a case having its bottom turned downwardly.
  • a head" 4 is mounted at thetop-of'the cylinder and a valve 5 controlling the Diesel oilinlet. is slid'ably guided therein.
  • valve 5 seals on its seat 6 formed in the head 4' in which it' is suitably guided for displacement and is pressed by a spring- 1 which tends to keep the valve open or'removed from its seat.
  • the valve is formed with a tappet-shaped extension 31' abutting the top flat surface of the disc 8 which is mounted for displacement inthe internal cylindrical chamber of the piston- 3 and is pressed by a spring l enclosed in said cylindrical recess and tending tomaintain the disc 8 against an abutment in the form of a resilient ring' H.
  • l2 denotes a longitudinal inlet manifold for the oil which flows through the port l3, chamber l4, bores l5, chamber [-6 and radial holes l in the head 4 reaching underneath the valve 5.
  • valve 1 On lifting the piston 3 by any mechanical, hydraulic, electric or pneumatic means, the valve 1 isnow promptly loaded by the spring I I] which overcomes the weaker spring I and sharply closes the valve. As the piston is moved further upwards, the oil collected underneath the valve is pushed through the holes 20 in the head 4 towards the injectors on the engine.
  • the pump is of course provided on its pressure linewith the ordinary check valve and all other known devices which are neither described nor illustrated for the sake of simplicity.
  • the piston 3 of the fuel pump is operated by a hydraulic transmission.
  • is arranged in the pump casing l underneath the cylinder 2 and a piston 22 moves in said cylinder.
  • the piston 22- is of the usual type employed in injection pumps with the difference that the liquid pumped therebyis lubricating oil instead of Diesel oil.
  • the life of the piston 3 will also be increased over the normal life of the pistons of injection pumps, although it directly acts on the fuel oil, because the valve function is not performed by the piston, which results in well-known objectionable consequences, the said function being performed by the head valve 5.
  • an upper manifold 26 is provided which communicates through the cona tight seal between the fuel oil circulating above" the cylinder 2
  • the above described device may be suited for instance by the modification shown on the drawing for transforming conventional pumps for operation according to this invention.
  • a fuel injection pump for internal combustion engines the combination with a cylinder, a hollow piston movable in said cylinder and a head forsaid cylinder, of a fuel inlet valve cooperating with a seat in said head and guided on its movement in an axial bore in said head, a weak spring between the bottom of said bore and said valve for maintaining the latter in its open position, a disc movable in said piston, a spring stronger than the firstmentioned spring between the disc and piston bottom for maintaining the disc against an abutment on the edge of the recess in the piston and an extension fixedly connected with said valve and bearing on said disc.
  • a fuel injection pump for internal combustion engines the combination with a cylinder, a hollow piston movable in said cylinder and head for said cylinder, of a fuel inlet valve cooperating with a seat in said head and, on the other side, an extension projecting into said cylinder, a weak spring between the bottom of said recess and the plunger tending to keep said valve in its open position, and a resilient member in said piston on which said extension bears.
  • a fuel injection pump for internal combustion engines the combination with a cylinder, a hollow piston movable in said cylinder and head for said cylinder, of a fuel inlet valve cooperating with a seat in said head and having,ion one side, a plunger guided in an axial recess in said head and, on the other side, an extension projecting into said cylinder, a weak spring between the bottom of said recess and the plunger tending to keep said valve in its open position, a disc movable in said piston and having holes for the flow of fuel, a spring stronger than the firstmentioned spring between the disc and piston bottom tending to push the said disc outwardly against the extension on said'valve.
  • a fuel injection pump for internal combustion engines the combination with a pump casing, pump cylinders in holes in said casing and a head for each of said cylinders, of an annular packing between said body and each of said cylinders held in position by said head, a fuel inlet valve cooperating with a seat in said head and guided on its movement in said head and a resilient member in said piston for closing said valve when said piston performs its pressure stroke.
  • a fuel injection pump for internal combustion engines the combination with a pump casing, of pump cylinders in holes in said casing, said cylinders having at one end an annular outer bearing flange of conical shape, a packing ring of resilient material bearing on the conical sur- "face of said flange between the cylinder and pump casing, a pressure disc on said packing ring, a
  • a fuel injection pump for internal combustion engines the combination with a cylinder, a hollow piston movable in said cylinder and a head for said cylinder, of a fuel inlet valve cooperating with a seat in said-head and guided on its movement in an axial bore in said head, a weak spring between the bottom of said bore and said valve for maintaining the latter in its open position, a disc movable in said piston, a spring stronger than the first-mentioned spring between the disc and piston bottom for maintaining the disc against an abutment on the edge of therecess in the piston and an extension fixedly connected with said valve and bearing on said disc, and means for actuating said piston against the action of said stronger spring.
  • a fuel inlet valve cooperating with a seat in said head and guided on its movement in an axial bore in said head, a weak spring between the bottom of said bore and said valve for maintaining the latter in its open position, a disc movable in said piston, a spring stronger than the firstmentioned spring between the disc and piston bottom for maintaining the disc against an abutment on the edge of the recess in the piston and an extension fix edly connected with said valve and bearing on said disc, and hydraulic means for actuating said piston against the action of said spring.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US91716A 1948-05-17 1949-05-06 Fuel injection pump for internal-combustion engines Expired - Lifetime US2555930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2555930X 1948-05-17

Publications (1)

Publication Number Publication Date
US2555930A true US2555930A (en) 1951-06-05

Family

ID=11435546

Family Applications (1)

Application Number Title Priority Date Filing Date
US91716A Expired - Lifetime US2555930A (en) 1948-05-17 1949-05-06 Fuel injection pump for internal-combustion engines

Country Status (5)

Country Link
US (1) US2555930A (de)
AT (1) AT171326B (de)
CH (1) CH275234A (de)
DE (1) DE819181C (de)
FR (1) FR985829A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080069712A1 (en) * 2004-06-16 2008-03-20 Michael Mennicken High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE910366C (de) * 1951-11-16 1954-05-03 Paul G Ehrhardt Brennstoff-Einspritzpumpe mit hydraulischem Antrieb fuer Verbrennungsmotoren
DE1046404B (de) * 1954-08-04 1958-12-11 Kugelfischer G Schaefer & Co Vorrichtung zum Entlueften des Hochdruckpumpenraumes von Kraftstoff-Einspritzpumpen
DE1076443B (de) * 1954-12-04 1960-02-25 Georg Wick Brennstoffeinspritzpumpe
DE1126678B (de) * 1955-08-02 1962-03-29 Max Mangl Aus Pumpe und Duese zusammengefasstes Brennstoffeinspritzgeraet fuer Brennkraftkolbenmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313264A (en) * 1938-10-21 1943-03-09 Reggio Ferdinando Cario Fuel supply system
US2378165A (en) * 1942-02-07 1945-06-12 Sulzer Ag Fuel injection device
US2389492A (en) * 1944-02-12 1945-11-20 Timken Roller Bearing Co Fuel injector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2313264A (en) * 1938-10-21 1943-03-09 Reggio Ferdinando Cario Fuel supply system
US2378165A (en) * 1942-02-07 1945-06-12 Sulzer Ag Fuel injection device
US2389492A (en) * 1944-02-12 1945-11-20 Timken Roller Bearing Co Fuel injector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080069712A1 (en) * 2004-06-16 2008-03-20 Michael Mennicken High-Pressure Pump for a Fuel Injection System of an Internal Combustion Engine

Also Published As

Publication number Publication date
AT171326B (de) 1952-05-26
DE819181C (de) 1951-10-31
CH275234A (it) 1951-05-15
FR985829A (fr) 1951-07-24

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