US3267863A - Liquid fuel injection pumps - Google Patents

Liquid fuel injection pumps Download PDF

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Publication number
US3267863A
US3267863A US351619A US35161964A US3267863A US 3267863 A US3267863 A US 3267863A US 351619 A US351619 A US 351619A US 35161964 A US35161964 A US 35161964A US 3267863 A US3267863 A US 3267863A
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United States
Prior art keywords
sleeve
teeth
plunger
fuel injection
liquid fuel
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Expired - Lifetime
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US351619A
Inventor
William L Clifton
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Bryce Berger Ltd
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Bryce Berger Ltd
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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
    • 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
    • F02M59/243—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movement of cylinders relative to their pistons
    • 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
    • F02M2700/1382—Fuel pump with control of the cylinder relative to non-rotary piston

Definitions

  • the object of the present invention is to provide convenient means whereby this engagement can be more readily effected.
  • control rod is located within the body part of a detachable cover, and there is provided in the toothed portion of the control rod and the toothed part of the sleeve respectively a pair of holes which can be aligned when their respective teeth are correctly interengaged, the arrangement being such that when the cover is removed the teeth of the control bar can quickly be engaged correctly with the teeth of the sleeve by inserting a wire or pin through the hole in the rod into the hole in the sleeve, and then moving the rod along the wire or pin until the teeth are engaged.
  • a known form of fuel injection pump which comprises a body part 1 in which is mounted a pump body 2. Within the pump body is formed a cylindrical bore 3 which ac commodates a reciprocable pumping plunger 4.
  • the plunger is provided with an abutment plate 5 at its outer end and located between the plate 5 and the body part 1 is a coiled compression spring 6 which urges the plunger towards the outer end of the bore.
  • the plunger is arranged to be moved inwardly, against the action of the spring, by an engine driven cam (not shown) which bears against a cup shaped follower 7 slidably mounted in the body part. Furthermore during the inward movement of the plunger fuel is discharged from the inner end of the bore 3 to an outlet 8 via a spring loaded non-return valve9.
  • the outlet 8 is arranged to be connected, in use, to an engine cylinder so that as the plunger is moved inwardly fuel will be delivered to the engine.
  • a helical or other shaped groove 10 which can register with a spill port 11 extending through a pump body 2 into an annular chamber 12 defined in the body part and to which fuel is delivered from a source of fuel under pressure through a pair of inlets 13.
  • the arrangement is such that when the spill port 11 is uncovered by the groove 10 during inward movement of the plunger fuel will be spilled from the inner end of the 3,267,863 Patented August 23, 1966 bore and the delivery of fuel to the engine will cease.
  • the outward movement of the plunger when the spill port is uncovered by the inner end of the plunger fuel will flow into the inner end of the bore from the annular chamber ready for the next inward movement of the plunger.
  • the plunger 4 is connected by a peg 16 to an extending toothed and co-axial sleeve 14 which is movable angularly about its axis by means of a control rod 15 movable axially at right angles to the axis of the sleeve, the rod being provided with rack teeth meshing with the sleeve.
  • the rod is slidable within a guideway 17 in the body part, and is retained within the guideway by means of a detachable cover 18.
  • a liquid fuel injection pump comprising in combination, a body part, a reciprocable pumping plunger mounted within the body part, a sleeve surrounding said plunger, means interconnecting the sleeve and plunger so that angular movement of the sleeve will result in angular movement of the plunger, a plurality of teeth formed on the outer periphery of the sleeve, a toothed control rod slidable in the body part the teeth of the control rod being engageable with the teeth of the sleeve, the control rod and sleeve having apertures formed therein and into which a rod or wire can be inserted so as to guide the engagement of the teeth of the rod with the teeth of the sleeve during assembly of the rod to the body part, and a cover which can be secured to the body part to retain the control rod therein after the engagement of the teeth of the sleeve and the teeth of the rod have been effected.

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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)

Description

Aug. 23, 1966 w, cL ToN 3,267,863
LIQUID FUEL INJECTION PUMPS Filed March 13. 1964 United States Patent LIQUID FUEL INJECTION PUMPS William L. Clifton, Churchdown, England, assignor to Bryce Berger Limited, Gloucester, England Filed Mar. 13, 1964, Ser. No. 351,619 Claims priority, application Great Britain, Mar. 14, 1963, 10,097/ 63 1 Claim. (Cl. 10341) This invention relates to liquid fuel injection pumps for internal combustion engines, and of the kind comprising in combination a bodypart, a reciprocable pumping plunger in the body part, an externally toothed sleeve, a longitudinally movable control rod having teeth meshing with the teeth of the sleeve, and means whereby angular movement of the sleeve will be imparted to the plunger to vary the quantity of fuel delivered by the pump.
During the assembly and re-assembly of such pumps it is often difficult to ensure that the teeth of the sleeve engage with the teeth of the control rod in the correct relationship, and the object of the present invention is to provide convenient means whereby this engagement can be more readily effected.
According to the invention the control rod is located within the body part of a detachable cover, and there is provided in the toothed portion of the control rod and the toothed part of the sleeve respectively a pair of holes which can be aligned when their respective teeth are correctly interengaged, the arrangement being such that when the cover is removed the teeth of the control bar can quickly be engaged correctly with the teeth of the sleeve by inserting a wire or pin through the hole in the rod into the hole in the sleeve, and then moving the rod along the wire or pin until the teeth are engaged.
In the accompanying drawing there is illustrated a known form of fuel injection pump which comprises a body part 1 in which is mounted a pump body 2. Within the pump body is formed a cylindrical bore 3 which ac commodates a reciprocable pumping plunger 4. The plunger is provided with an abutment plate 5 at its outer end and located between the plate 5 and the body part 1 is a coiled compression spring 6 which urges the plunger towards the outer end of the bore.
The plunger is arranged to be moved inwardly, against the action of the spring, by an engine driven cam (not shown) which bears against a cup shaped follower 7 slidably mounted in the body part. Furthermore during the inward movement of the plunger fuel is discharged from the inner end of the bore 3 to an outlet 8 via a spring loaded non-return valve9. The outlet 8 is arranged to be connected, in use, to an engine cylinder so that as the plunger is moved inwardly fuel will be delivered to the engine.
Moreover in the inner end portion of the periphery of the plunger is a helical or other shaped groove 10 which can register with a spill port 11 extending through a pump body 2 into an annular chamber 12 defined in the body part and to which fuel is delivered from a source of fuel under pressure through a pair of inlets 13. The arrangement is such that when the spill port 11 is uncovered by the groove 10 during inward movement of the plunger fuel will be spilled from the inner end of the 3,267,863 Patented August 23, 1966 bore and the delivery of fuel to the engine will cease. During the outward movement of the plunger when the spill port is uncovered by the inner end of the plunger fuel will flow into the inner end of the bore from the annular chamber ready for the next inward movement of the plunger.
The plunger 4 is connected by a peg 16 to an extending toothed and co-axial sleeve 14 which is movable angularly about its axis by means of a control rod 15 movable axially at right angles to the axis of the sleeve, the rod being provided with rack teeth meshing with the sleeve. The rod is slidable within a guideway 17 in the body part, and is retained within the guideway by means of a detachable cover 18.
In applying the invention to such a pump there is formed in the toothed portion of the control rod 15 a hole 15a which can be brought into register with a hole 14a in the sleeve when the control rod and sleeve are meshing in the correct relationship. These two holes serve to facilitate assembly and re-assem'bly of the pump which is effected by inserting a wire or pin through the hole 15a in the control rod, and then into the hole 14a in the sleeve. The control rod is then slid along the wire or pin until its teeth engage the teeth of the sleeve thereby ensuring the correct relationship of the teeth. Subsequently, the wire or pin is withdrawn, and the cover 18 is attached to the body part to hold the teeth in mesh.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:
A liquid fuel injection pump comprising in combination, a body part, a reciprocable pumping plunger mounted within the body part, a sleeve surrounding said plunger, means interconnecting the sleeve and plunger so that angular movement of the sleeve will result in angular movement of the plunger, a plurality of teeth formed on the outer periphery of the sleeve, a toothed control rod slidable in the body part the teeth of the control rod being engageable with the teeth of the sleeve, the control rod and sleeve having apertures formed therein and into which a rod or wire can be inserted so as to guide the engagement of the teeth of the rod with the teeth of the sleeve during assembly of the rod to the body part, and a cover which can be secured to the body part to retain the control rod therein after the engagement of the teeth of the sleeve and the teeth of the rod have been effected.
References Cited by the Examiner UNITED STATES PATENTS 2,670,684 3/1954 Fagerholt. 2,700,342 l/ 1955 French. 2,922,369 1/ 1960 Nystrom 103154 3,004,496 10/ 1961 Minett 103-154 FOREIGN PATENTS 1,317,076 12/1962 France.
645,262 8/ 1935 Germany. 1,035,404 7/ 1958 Germany.
636,351 4/ 1950 Great Britain. 403,026 4/ 1943 Italy.
MARK NEWMAN, Primary Examiner.
W. J. KRAUSS, Assistant Examiner.
US351619A 1963-03-14 1964-03-13 Liquid fuel injection pumps Expired - Lifetime US3267863A (en)

Applications Claiming Priority (1)

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GB10097/63A GB987513A (en) 1963-03-14 1963-03-14 Liquid fuel injection pumps

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870996A (en) * 1998-04-10 1999-02-16 Alfred J. Buescher High-pressure dual-feed-rate injector pump with auxiliary spill port
US6009850A (en) * 1998-04-10 2000-01-04 Alfred J. Buescher High-pressure dual-feed-rate injector pump with grooved port-closing edge

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1985788U (en) 1966-12-30 1968-05-22 Bosch Gmbh Robert FINE FUEL INJECTION PUMP FOR COMBUSTION MACHINES.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645262C (en) * 1935-08-11 1937-05-24 Friedrich Deckel Praez S Mecha Injection pump for internal combustion engines
GB636351A (en) * 1946-07-13 1950-04-26 Injector Company Aktiebolag Improvements in or relating to fuel injection pumps for internal combustion engines
US2670684A (en) * 1950-01-21 1954-03-02 Volvo Ab Fuel injection device for internalcombustion engines
US2700342A (en) * 1953-05-22 1955-01-25 Louis O French Fuel pump
DE1035404B (en) * 1957-01-23 1958-07-31 Bosch Gmbh Robert Fuel injection pump system with multiple pump pistons
US2922369A (en) * 1956-02-06 1960-01-26 Bosch Arma Corp Fuel injection apparatus
US3004496A (en) * 1956-02-28 1961-10-17 Napier & Son Ltd Fuel injection pumps for internal combustion engines
FR1317076A (en) * 1961-03-17 1963-02-01 Bosch Gmbh Robert Fuel injection pump for combustion engines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645262C (en) * 1935-08-11 1937-05-24 Friedrich Deckel Praez S Mecha Injection pump for internal combustion engines
GB636351A (en) * 1946-07-13 1950-04-26 Injector Company Aktiebolag Improvements in or relating to fuel injection pumps for internal combustion engines
US2670684A (en) * 1950-01-21 1954-03-02 Volvo Ab Fuel injection device for internalcombustion engines
US2700342A (en) * 1953-05-22 1955-01-25 Louis O French Fuel pump
US2922369A (en) * 1956-02-06 1960-01-26 Bosch Arma Corp Fuel injection apparatus
US3004496A (en) * 1956-02-28 1961-10-17 Napier & Son Ltd Fuel injection pumps for internal combustion engines
DE1035404B (en) * 1957-01-23 1958-07-31 Bosch Gmbh Robert Fuel injection pump system with multiple pump pistons
FR1317076A (en) * 1961-03-17 1963-02-01 Bosch Gmbh Robert Fuel injection pump for combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870996A (en) * 1998-04-10 1999-02-16 Alfred J. Buescher High-pressure dual-feed-rate injector pump with auxiliary spill port
US6009850A (en) * 1998-04-10 2000-01-04 Alfred J. Buescher High-pressure dual-feed-rate injector pump with grooved port-closing edge

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GB987513A (en) 1965-03-31

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