US3638631A - R.p.m. regulator for fuel injection pumps - Google Patents

R.p.m. regulator for fuel injection pumps Download PDF

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Publication number
US3638631A
US3638631A US15085A US3638631DA US3638631A US 3638631 A US3638631 A US 3638631A US 15085 A US15085 A US 15085A US 3638631D A US3638631D A US 3638631DA US 3638631 A US3638631 A US 3638631A
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US
United States
Prior art keywords
lever
starting
piston
arm
chamber
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
US15085A
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English (en)
Inventor
Franz Eheim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19691911913 external-priority patent/DE1911913C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3638631A publication Critical patent/US3638631A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M59/44—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
    • F02M59/447—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 means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston

Definitions

  • regulator for fuel injection pumps is of the type that is provided with an intermediate lever connected to and actuated by an r.p.m.-responsive member against the force of an arbitrarily adjustable regulator spring. Said intermediate lever is also connected to and actuated by a starting spring for delivering an additional fuel quantity required for starting the engine with which said pump is associated. The aforenoted forces imparted to the intermediate lever are transmitted thereby to a fuel quantity control member ofthe fuel injection pump.
  • the relatively soft starting spring is tensioned until the arbitrarily adjustable force of the regulating spring proper takes effect.
  • the r.p.m.-responsive device has to travel a certain path before the r.p.m. regulation proper starts. This substantially limits the working capacity of the r.p.m.-responsive device.
  • Centrifugal r.p.m. regulators of the known type further have the disadvantagethattheir working capacity in the starting r.p.m. range is very small and thus the r.p.m.-responsive device has to travel a substantial distance (for example, one-half of its entire path of travel), in order to tension the starting spring. This is disadvantageous in that it necessitates large dimensions of the regulator.
  • the starting spring acts upon-the intermediate lever through a starting piston axi ally displaceable in a fluidtight manner in theregulator housing, until said piston is displaced by an r.p.m -dependent hydraulic pressure when the engine reaches a predetermined r.p.m. beyond the starting r.p.m.
  • FIG. 1 is a schematic sectional view of the preferredembodiment of the invention with thesstarting piston in its starting position and FIG. 2 is a fragmentary view'similar to FIG. 1 with the starting piston in its position assumedduring the normal operation of the engine.
  • a cylinder 2 in which a pump piston 3 is caused to reciprocate and rotate by means not shown.
  • the pump work chamber which forms part of cylinder 2 is supplied with fuel through longitudinal grooves 5 provided in the outer face of the piston 3 and a supply channel 6 provided in the housing 1 and leading from a suction chamber 7.
  • each pressure conduit 10 is provided with a check valve 9 and leads to the internal combustion engine, not shown.
  • an axially displaceable control sleeve .12 which does not participate in the reciprocating motion of piston 3.
  • the latter contains a bypass channel formed of radial bore 13 and axial bore 4.
  • the radial bore 13 continuously communicates through here 4 with the pump work chamber and is blocked by the control sleeve 12 during one part of the reciprocating motion of piston 3.
  • fuel delivery to the engine takes place through pressure conduits 10.
  • hydraulic communication is established between the pump work chamber and the suction chamber 7 through bypass channel 4, 13.
  • governor member 21 is displaced, causing a pivotal motion of lever 14.
  • the preload of the regulator spring 18 may be arbitrarily adjusted through a bar.22.
  • One arm of the two-arm lever 15 projects with a spherical head 23 into a complemental depression 24 of the control :sleeve .12.
  • the other arm of lever 15 is urged into one direction by a linkage spring 25 supported by lever 14, and is urged into an opposite direction by a starting piston 26 loaded by a starting spring 27.
  • an integral detent member 28 which limits the pivotal motion of the lever 15 and'which, during normal operation, holdsthe adjacent end of lever 15 urged thereagainst by linkage spring 25.
  • the starting piston 26 operates in a cylinder 29 provided in pump housing 1.
  • the cylinder 29 is depressurized by a throttledchannel530.
  • a bore 31 through which the fuel may flow from the suction chamber 7 throughthe throttled channel 30.
  • the bore 31 is closed upon withdrawal of the starting piston 26 into the cylinder 29 to a small, predetermined extent.
  • the r.p.m. regulator When the internal combustion engine and the fuel injection pump are inoperative, the r.p.m. regulator is in its starting position as shown in FIG. 1.
  • the starting piston 26 is pushed out of the bore 29 by the starting spring 27 to such an extent that the bore 31 communicates with the suction chamber 7 and the spring 25 is compressed.
  • the adjacent arm of the lever 15 is urged into contact with the lever 14 by means of starting piston 26 urged by starting spring 27.
  • the control sleeve 12 In this position, by means of, the other arm of lever 15, the control sleeve 12 is displaced to such an extent that bore 13 stays within the control sleeve 12 during substantially the entire reciprocating motion of piston 3.
  • fuel is forced from the pump work chamber through the pressure conduits to the internal combustion engine during substantially the entire pressure strokes of piston 3.
  • the terminal head 23 shifts the control sleeve 12 into a new position shown in broken lines in FIG. 1 and in solid lines in FIG. 2.
  • the stroke of the pump piston 3 necessary for the radial bore 13 to emerge from control sleeve 12 and thus to establish communication between the suction chamber 7 and the pump work chamber is substantially smaller for a position (normal operating position) of control sleeve 12 according to FIG. 2 than for a position (starting position) according to FIG. 1.
  • fuel delivery is cut off at an earlier point during each pressure stroke and consequently, the delivery of additional fuel quantities required for the starting of the engine is discontinued.
  • F. means for generating in said chamber an r.p.m.-dependent hydraulic pressure exerting a force on said starting piston in said first direction for moving said starting piston into an inoperative or withdrawn position beyond a predetermined r.p.m.
  • G a lever assembly including 1. stationary pivot means,
  • a second lever swingable about said pivot means and formed of a. a first arm engaging said fuel quantity control means, b. a second arm integral with said first arm and disposed in the path of motion of said starting piston, said second arm being moved away from said detent and into contact with said first lever by said starting piston in said operative position for the delivery of excess fuel quantities required for the starting of said engine,
  • a linkage spring disposed between said first lever and said second arm of said second lever for urging said second arm away from said first lever and into abutting contact with said detent and H.
  • a throttled discharge channel communicating with said chamber for slowing down the buildup of said r.p.m.-dependent pressure therein, said discharge channel closed by said starting piston upon travelling a predetermined distance under the effect of said hydraulic pressure in said first direction from said operative position into said in operative position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Fuel-Injection Apparatus (AREA)
US15085A 1969-03-08 1970-02-27 R.p.m. regulator for fuel injection pumps Expired - Lifetime US3638631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691911913 DE1911913C3 (de) 1969-03-08 Drehzahlregler für Kraftstoffeinspritzpumpen von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3638631A true US3638631A (en) 1972-02-01

Family

ID=5727569

Family Applications (1)

Application Number Title Priority Date Filing Date
US15085A Expired - Lifetime US3638631A (en) 1969-03-08 1970-02-27 R.p.m. regulator for fuel injection pumps

Country Status (5)

Country Link
US (1) US3638631A (de)
JP (1) JPS4943659B1 (de)
AT (1) AT298159B (de)
FR (1) FR2041066A1 (de)
GB (1) GB1254394A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756213A (en) * 1970-08-20 1973-09-04 Honda Motor Co Ltd Internal combustion engine of the fuel injection type
US3791361A (en) * 1971-09-09 1974-02-12 Bosch Gmbh Robert Rpm regulator for a fuel injection pump serving an internal combustion engine
US3942498A (en) * 1973-07-17 1976-03-09 Robert Bosch Gmbh Regulator for a fuel injection pump
US3942914A (en) * 1973-10-26 1976-03-09 Robert Bosch Gmbh Fuel injection pump
US3946716A (en) * 1973-08-21 1976-03-30 Robert Bosch Gmbh Rpm regulator for fuel injection pumps
US3970066A (en) * 1973-10-03 1976-07-20 Robert Bosch G.M.B.H. RPM regulator for fuel injection pumps
US3970064A (en) * 1974-01-23 1976-07-20 Robert Bosch G.M.B.H. RPM regulator for fuel injection pumps
US3971351A (en) * 1974-09-23 1976-07-27 Mckee T R Fuel metering system
US3974812A (en) * 1974-01-18 1976-08-17 Robert Bosch G.M.B.H. Speed regulator for fuel injection pumps
US3974814A (en) * 1974-01-23 1976-08-17 Robert Bosch G.M.B.H. Speed regulator for fuel injection pumps
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US4112897A (en) * 1975-11-26 1978-09-12 Daimler-Benz Aktiengesellschaft Rotational speed governor for an injection pump in air-compressing injection internal combustion engines
US4164921A (en) * 1976-10-29 1979-08-21 Robert Bosch Gmbh Fuel injection pump
US4273090A (en) * 1976-10-23 1981-06-16 Robert Bosch Gmbh Fuel injection pump
US4530330A (en) * 1983-10-28 1985-07-23 Diesel Kiki Co., Ltd. Distribution type fuel injection pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2449332C2 (de) * 1974-10-17 1986-08-07 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffverteilereinspritzpumpe für Brennkraftmaschinen
IT1165500B (it) * 1983-12-23 1987-04-22 Piaggio & C Spa Regolatore dell'alimentazione di un motore a ciclo diesel in fase di avviamento
JPS6244179U (de) * 1985-09-06 1987-03-17

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB697616A (en) * 1950-07-05 1953-09-23 Cav Ltd Regulating means for liquid fuel injection pumps for internal combustion engines
US2708921A (en) * 1950-03-21 1955-05-24 Daimler Benz Ag Control device for combustion engines
GB740674A (en) * 1953-02-14 1955-11-16 Bosch Gmbh Robert Improvements in fuel injection systems for internal combustion engines
US2836162A (en) * 1956-09-19 1958-05-27 Int Harvester Co Governing mechanism for fuel injection pumps of diesel engines
US2966902A (en) * 1957-02-05 1961-01-03 Daimler Benz Ag Fuel supply system for internal combustion engines
US3083531A (en) * 1959-05-20 1963-04-02 Avco Corp Fuel control deceleration scheduling mechanism
US3311102A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines
US3311101A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708921A (en) * 1950-03-21 1955-05-24 Daimler Benz Ag Control device for combustion engines
GB697616A (en) * 1950-07-05 1953-09-23 Cav Ltd Regulating means for liquid fuel injection pumps for internal combustion engines
GB740674A (en) * 1953-02-14 1955-11-16 Bosch Gmbh Robert Improvements in fuel injection systems for internal combustion engines
US2836162A (en) * 1956-09-19 1958-05-27 Int Harvester Co Governing mechanism for fuel injection pumps of diesel engines
US2966902A (en) * 1957-02-05 1961-01-03 Daimler Benz Ag Fuel supply system for internal combustion engines
US3083531A (en) * 1959-05-20 1963-04-02 Avco Corp Fuel control deceleration scheduling mechanism
US3311102A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines
US3311101A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756213A (en) * 1970-08-20 1973-09-04 Honda Motor Co Ltd Internal combustion engine of the fuel injection type
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US3791361A (en) * 1971-09-09 1974-02-12 Bosch Gmbh Robert Rpm regulator for a fuel injection pump serving an internal combustion engine
US3942498A (en) * 1973-07-17 1976-03-09 Robert Bosch Gmbh Regulator for a fuel injection pump
US3946716A (en) * 1973-08-21 1976-03-30 Robert Bosch Gmbh Rpm regulator for fuel injection pumps
US3970066A (en) * 1973-10-03 1976-07-20 Robert Bosch G.M.B.H. RPM regulator for fuel injection pumps
US3942914A (en) * 1973-10-26 1976-03-09 Robert Bosch Gmbh Fuel injection pump
US3974812A (en) * 1974-01-18 1976-08-17 Robert Bosch G.M.B.H. Speed regulator for fuel injection pumps
US3974814A (en) * 1974-01-23 1976-08-17 Robert Bosch G.M.B.H. Speed regulator for fuel injection pumps
US3970064A (en) * 1974-01-23 1976-07-20 Robert Bosch G.M.B.H. RPM regulator for fuel injection pumps
US3971351A (en) * 1974-09-23 1976-07-27 Mckee T R Fuel metering system
US4112897A (en) * 1975-11-26 1978-09-12 Daimler-Benz Aktiengesellschaft Rotational speed governor for an injection pump in air-compressing injection internal combustion engines
US4273090A (en) * 1976-10-23 1981-06-16 Robert Bosch Gmbh Fuel injection pump
US4395990A (en) * 1976-10-23 1983-08-02 Robert Bosch Gmbh Fuel injection pump
US4489698A (en) * 1976-10-23 1984-12-25 Robert Bosch Gmbh Fuel injection pump
US4164921A (en) * 1976-10-29 1979-08-21 Robert Bosch Gmbh Fuel injection pump
US4530330A (en) * 1983-10-28 1985-07-23 Diesel Kiki Co., Ltd. Distribution type fuel injection pump

Also Published As

Publication number Publication date
AT298159B (de) 1972-04-25
GB1254394A (en) 1971-11-24
DE1911913B2 (de) 1977-03-10
FR2041066A1 (de) 1971-01-29
JPS4943659B1 (de) 1974-11-22
DE1911913A1 (de) 1970-09-24

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