US3665907A - Device for adjusting the timing in fuel injection pumps - Google Patents

Device for adjusting the timing in fuel injection pumps Download PDF

Info

Publication number
US3665907A
US3665907A US27767A US3665907DA US3665907A US 3665907 A US3665907 A US 3665907A US 27767 A US27767 A US 27767A US 3665907D A US3665907D A US 3665907DA US 3665907 A US3665907 A US 3665907A
Authority
US
United States
Prior art keywords
valve
movable
adjusting member
sphere
opening
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
US27767A
Other languages
English (en)
Inventor
Helmut Laufer
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 DE19691920274 external-priority patent/DE1920274C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3665907A publication Critical patent/US3665907A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02D1/16—Adjustment of injection timing
    • F02D1/18—Adjustment of injection timing with non-mechanical means for transmitting control impulse; with amplification of control impulse
    • 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
    • F02M41/14—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 rotary distributor supporting pump pistons
    • F02M41/1405—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 rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
    • F02M41/1411—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 rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection timing
    • F02M41/1416—Devices specially adapted for angular adjustment of annular cam

Definitions

  • the fuel injection pump is of the type that includes at least one reciprocating pump piston that delivers fuel to the engine during the pressure strokes.
  • the start of injection of fuel during each pressure stroke of the pump piston, related to the engine shaft, is adjustable by means which may be acted upon by a hydraulic fluid. The latter is admitted through a check valve and is opposed by a return force afiecting said means.
  • the hydraulic circuit which controls said fluid is provided, downstream of said check valve, with a bypass channel controlled by a discharge valve.
  • bypass channel is controlled by means of a plunger which simultaneously serves as the control piston of a hydraulic servo control circuit containing a setting piston for adjusting the cam ring of the fuel injection pump.
  • a servo system of this type which is designed as a follower control and which operates with two pistons displaceable against two springs, is relatively complex and expensive.
  • the displacement of the means for changing the timing i.e., the beginning of the injection, is dependent of the rpm of the fuel injection pump, since the hydraulic fluid pressure which exerts a force on the aforenoted plunger, is controlled in an rmp-dependent manner.
  • the movable valve member of the discharge valve controlling the bypass channel is actuated by an electromagnet.
  • the electromagnet simultaneously with the unseating (opening) of the discharge valve, causes the aforenoted check valve to close.
  • the fuel passes through a filter 10 into a pressure chamber 11 which is in communication with a control chamber 13 by means of a port 12.
  • the circular opening of the port 1 2 at the control chamber 13 is defined by a valve seat 12a, with which there is associated a check valve sphere 14 disposed in he control chamber 13.
  • the adjusting member 17 includes a cylinder 18, an associated, hydraulically operated, reciprocating piston 19, a piston rod 20 affixed to said piston and a return spring 21.
  • the piston rod 20 is connected with the cam ring (not shown) of the fuel injection pump for causing angular displacements thereof.
  • the control chamber 13 is further provided with a two-part discharge channel 22 which communicates with a discharge conduit 23 extending to the fuel tank 4.
  • the opening of the discharge bore 22 at the control chamber 13 is defined by a valve seat 22a associated with a discharge valve sphere 24 disposed in the control chamber 13.
  • the valve sphere 24 may be unseated from the outlet side by means of the armature 25 of an electromagnet. As the sphere 24 is unseated, it urges the sphere 14into the valve seat 120. Conversely, as long as the armature 25 exerts no unseating force on sphere 24, the sphere 14 is unseated by the force exerted by the fluid present in pressure chamber 11 and presses the sphere 24 against the valve seat 22a.
  • each sphere mutually serves for the other sphere as an abutment determining a maximum flow passage section.
  • the resetting forces exerted on the piston rod 20 during the pressure stroke of the pump piston or pistons cause an increase of the pressure in the control chamber 13.
  • both spheres 14 and 24 are pressed into their respective seat 12a, 22a, so that a hydraulic lock is obtained which blocks any further displacement of the piston rod 20 in response to the resetting forces.
  • the armature 25 of the electromagnet is maintained in its position shown in the Figure, as long as the solenoid 26 is in an energized condition.
  • the solenoid 26 is de-energized, the armature 25 is hydraulically displaced, the sphere 24 is unseated in the afore-described manner and thus, discharge bore 22 is opened.
  • the pressure chamber 11 is connected, through a channel 27, with a magnet chamber 28 from which hydraulic fluid under pressureis admitted to the radial face 25' through an annular clearance 30.
  • the latter is defined by a peripheral wall portion of armature 25 and an inner wall portion of a bushing 29 carrying the solenoid 26.
  • the armature portion which separates the magnet chamber 28 from the discharge bore 22 has a diameter larger than the diameter of the valve seats 12a or 22a.
  • the electromagnet is operated by means of an electronic regulating apparatus, not shown, which, dependent upon the rpm, load or other variables characterizing the operation of the engine, ensures that the actual moment of the beginning of the injection is matched with the ideal moment, related to the shaft of the internal combustion engine.
  • an electronic regulating apparatus not shown, which, dependent upon the rpm, load or other variables characterizing the operation of the engine, ensures that the actual moment of the beginning of the injection is matched with the ideal moment, related to the shaft of the internal combustion engine.
  • the valve device comprising the check valve ball 14 and the discharge valve ball 24 is capable to prevent the motion of the piston 19 in the direction in response to random forces exerted on the rod 20.
  • a fluid pressure is generated in the ports 15 and control chamber 13 which is greater than either the fluid pressure upstream of the check valve 14 or the force of the armature 25 (in case the solenoid 26 is de-energized and the armature is urged downwardly by the pressure in the chamber 28) on the discharge valve ball 24.
  • a device for adjusting the timing of a fuel injection pump associated with an internal combustion engine said device being of the known type that includes (A) a movable adjusting member to effect a change in said timing, (B) conduit means carrying hydraulic fluid under pressure to said adjusting member for causing displacement thereof in one direction, (C) means exerting a force to said adjusting member in a second, opposite direction, (D) a check valve contained in said conduit means and including a movable valve member openable towards said adjusting member, (E) bypass channel means communicating with said conduit means downstream of said check valve and upstream of said adjusting member, and (F) a discharge valve including a movable valve member opening and closing said bypass channel means, the improvement comprising,
  • a device for adjusting the timing of a fuel injection pump associated with an internal combustion engine said device being of the known type that includes (A) a movable adjusting member to effect a change in said timing, (8) conduit means carrying hydraulic fluid under pressure to said adjusting member for causing displacement thereof in one direction, (C) means exerting a force to said adjusting member in a second, opposite direction, (D) a check valve contained in said conduit means and including a movable valve member openable towards said adjusting member, (E) bypass channel means communicating with said conduit means downstream of said check valve and upstream of said adjusting member, and (F) a discharge valve including a movable valve member opening and closing said bypass channel means, the improvement comprising, an electromagnet operatively connected with the movable valve member of said discharge valve to cause opening or closing of said bypass channel, said electromagnet including a reciprocable armature being movable in a first direction by the fluid pressure prevailing in said conduit means upstream of said check valve, said armature being movable
  • a device for adjusting the timing of a fuel injection pump associated with an internal combustion engine said device being of the known type that includes (A) a movable adjusting member to effect a change in said timing, (B) conduit means carrying hydraulic fluid under pressure to said adjusting member for causing displacement thereof in one direction, (C) means exerting a force to said adjusting member in a second, opposite direction, (D) a check valve contained in said conduit means and including a movable valve member openable towards said adjusting member, (E) bypass channel means communicating with said conduit means downstream of said check valve and upstream of said adjusting member, and (F) a discharge valve including a movable valve member opening and closing said bypass channel means, the improvement comprising,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US27767A 1969-04-22 1970-04-13 Device for adjusting the timing in fuel injection pumps Expired - Lifetime US3665907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691920274 DE1920274C3 (de) 1969-04-22 Stelleinrichtung für eine Kraftstoffeinspritzpumpe

Publications (1)

Publication Number Publication Date
US3665907A true US3665907A (en) 1972-05-30

Family

ID=5731870

Family Applications (1)

Application Number Title Priority Date Filing Date
US27767A Expired - Lifetime US3665907A (en) 1969-04-22 1970-04-13 Device for adjusting the timing in fuel injection pumps

Country Status (9)

Country Link
US (1) US3665907A (pl)
AT (1) AT302726B (pl)
ES (1) ES378844A1 (pl)
FR (1) FR2046346A5 (pl)
GB (1) GB1306096A (pl)
NL (1) NL163305C (pl)
PL (1) PL80591B1 (pl)
RO (1) RO56257A (pl)
SE (1) SE357029B (pl)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796205A (en) * 1971-05-28 1974-03-12 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
US3796206A (en) * 1971-05-28 1974-03-12 Bosch Gmbh Robert Pump-and-nozzle assembly for injecting fuel in internal combustion engines
US3815564A (en) * 1971-03-06 1974-06-11 Nippon Denso Co Fuel injection device for internal combustion engines
US3837324A (en) * 1972-03-22 1974-09-24 Bosch Gmbh Robert Fuel injection system for internal combustion engines
US3851635A (en) * 1969-05-14 1974-12-03 F Murtin Electronically controlled fuel-supply system for compression-ignition engine
US3921604A (en) * 1971-05-28 1975-11-25 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
US3990422A (en) * 1973-11-01 1976-11-09 The Bendix Corporation Common rail fuel injection system
US4014304A (en) * 1974-09-02 1977-03-29 Fiat Societa Per Azioni Injection pumps for diesel engines
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US4044745A (en) * 1973-03-14 1977-08-30 Holec, N.V. Injector pump
US4068640A (en) * 1975-11-01 1978-01-17 The Bendix Corporation Common rail fuel injection system
US4180022A (en) * 1977-10-31 1979-12-25 Chrysler Corporation Fuel injection system and control valve for multi-cylinder engines
US4342302A (en) * 1979-06-09 1982-08-03 Robert Bosch Gmbh Control apparatus for a fuel injection pump
US4346688A (en) * 1979-02-19 1982-08-31 Diesel Kiki Co., Ltd. Injection timing control system for fuel injection pump
US4395990A (en) * 1976-10-23 1983-08-02 Robert Bosch Gmbh Fuel injection pump
US4450818A (en) * 1979-08-11 1984-05-29 Daimler-Benz Aktiengesellschaft Hydraulic injection-adjusting device for high pressure injection installations in auto-igniting internal combustion engines
US4470397A (en) * 1981-11-11 1984-09-11 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US5455391A (en) * 1991-06-06 1995-10-03 N.V. Raychem S.A. Cable sealing
WO2001009028A1 (fr) * 1999-08-03 2001-02-08 Sidel Vanne a bille avec fente pour debit permanent
US10683825B1 (en) * 2018-12-04 2020-06-16 Delphi Technologies Ip Limited Fuel pump and inlet valve assembly thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622435U (pl) * 1979-07-28 1981-02-27
JPS581012A (ja) * 1981-06-25 1983-01-06 Nippon Steel Corp 均質な鋼の製造方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB311643A (en) * 1928-11-16 1929-05-16 Georges Held Improvements in means for controlling the supply of fuel to internal combustion engines
CH215479A (de) * 1938-10-29 1941-06-30 Bosch Gmbh Robert Vorrichtung zum hydraulischen Verstellen des Spritzzeitpunktes bei Einspritzbrennkraftmaschinen.
US2305308A (en) * 1939-02-17 1942-12-15 Fischlmayr Hans Automatic timing mechanism for fuel injection pumps
US2910975A (en) * 1957-02-22 1959-11-03 Cav Ltd Liquid fuel pumps for internal combustion engines
DE1072837B (de) * 1956-08-22 1960-01-07 Robert Bosch G.M.B.H., Stuttgart Vorrichtung zum verstellen der kraftstoffmenge und des einspritzzeitpunktes bei einspritzkraftmaschinen
AT208133B (de) * 1956-08-22 1960-03-25 Bosch Gmbh Robert Vorrichtung zum Verändern der einzuspritzenden Kraftstoffmenge und zum Verstellen des Einspritzzeitpunktes bei Einspritzbrennkraftmaschinen
US3308799A (en) * 1963-11-14 1967-03-14 Bosch Gmbh Robert Devices for varying the beginning of delivery in fuel injection pumps
US3416505A (en) * 1965-10-05 1968-12-17 Cav Ltd Fluid control valves
US3425401A (en) * 1966-05-20 1969-02-04 Bosch Gmbh Robert Electronic controller for diesel engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB311643A (en) * 1928-11-16 1929-05-16 Georges Held Improvements in means for controlling the supply of fuel to internal combustion engines
CH215479A (de) * 1938-10-29 1941-06-30 Bosch Gmbh Robert Vorrichtung zum hydraulischen Verstellen des Spritzzeitpunktes bei Einspritzbrennkraftmaschinen.
US2305308A (en) * 1939-02-17 1942-12-15 Fischlmayr Hans Automatic timing mechanism for fuel injection pumps
DE1072837B (de) * 1956-08-22 1960-01-07 Robert Bosch G.M.B.H., Stuttgart Vorrichtung zum verstellen der kraftstoffmenge und des einspritzzeitpunktes bei einspritzkraftmaschinen
AT208133B (de) * 1956-08-22 1960-03-25 Bosch Gmbh Robert Vorrichtung zum Verändern der einzuspritzenden Kraftstoffmenge und zum Verstellen des Einspritzzeitpunktes bei Einspritzbrennkraftmaschinen
US2910975A (en) * 1957-02-22 1959-11-03 Cav Ltd Liquid fuel pumps for internal combustion engines
US3308799A (en) * 1963-11-14 1967-03-14 Bosch Gmbh Robert Devices for varying the beginning of delivery in fuel injection pumps
US3416505A (en) * 1965-10-05 1968-12-17 Cav Ltd Fluid control valves
US3425401A (en) * 1966-05-20 1969-02-04 Bosch Gmbh Robert Electronic controller for diesel engine

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851635A (en) * 1969-05-14 1974-12-03 F Murtin Electronically controlled fuel-supply system for compression-ignition engine
US3815564A (en) * 1971-03-06 1974-06-11 Nippon Denso Co Fuel injection device for internal combustion engines
US3796205A (en) * 1971-05-28 1974-03-12 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
US3796206A (en) * 1971-05-28 1974-03-12 Bosch Gmbh Robert Pump-and-nozzle assembly for injecting fuel in internal combustion engines
US3921604A (en) * 1971-05-28 1975-11-25 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US3837324A (en) * 1972-03-22 1974-09-24 Bosch Gmbh Robert Fuel injection system for internal combustion engines
US4044745A (en) * 1973-03-14 1977-08-30 Holec, N.V. Injector pump
US3990422A (en) * 1973-11-01 1976-11-09 The Bendix Corporation Common rail fuel injection system
US4014304A (en) * 1974-09-02 1977-03-29 Fiat Societa Per Azioni Injection pumps for diesel engines
US4068640A (en) * 1975-11-01 1978-01-17 The Bendix Corporation Common rail fuel injection system
US4395990A (en) * 1976-10-23 1983-08-02 Robert Bosch Gmbh Fuel injection pump
US4180022A (en) * 1977-10-31 1979-12-25 Chrysler Corporation Fuel injection system and control valve for multi-cylinder engines
US4346688A (en) * 1979-02-19 1982-08-31 Diesel Kiki Co., Ltd. Injection timing control system for fuel injection pump
US4342302A (en) * 1979-06-09 1982-08-03 Robert Bosch Gmbh Control apparatus for a fuel injection pump
US4450818A (en) * 1979-08-11 1984-05-29 Daimler-Benz Aktiengesellschaft Hydraulic injection-adjusting device for high pressure injection installations in auto-igniting internal combustion engines
US4470397A (en) * 1981-11-11 1984-09-11 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US5455391A (en) * 1991-06-06 1995-10-03 N.V. Raychem S.A. Cable sealing
WO2001009028A1 (fr) * 1999-08-03 2001-02-08 Sidel Vanne a bille avec fente pour debit permanent
FR2797260A1 (fr) * 1999-08-03 2001-02-09 Sidel Sa Dispositif de commande d'un debit de fluide et machine de remplissage comportant un tel dispositif
US6578604B1 (en) 1999-08-03 2003-06-17 Sidel Ball valve with slot for continuous flow
US10683825B1 (en) * 2018-12-04 2020-06-16 Delphi Technologies Ip Limited Fuel pump and inlet valve assembly thereof

Also Published As

Publication number Publication date
NL7005738A (pl) 1970-10-26
GB1306096A (pl) 1973-02-07
ES378844A1 (es) 1973-01-16
NL163305B (nl) 1980-03-17
NL163305C (nl) 1980-08-15
AT302726B (de) 1972-10-25
PL80591B1 (pl) 1975-08-30
DE1920274A1 (de) 1970-11-26
SE357029B (pl) 1973-06-12
FR2046346A5 (pl) 1971-03-05
RO56257A (pl) 1974-04-29
DE1920274B2 (de) 1977-03-24

Similar Documents

Publication Publication Date Title
US3665907A (en) Device for adjusting the timing in fuel injection pumps
US3689205A (en) Pump-and-nozzle assembly for injecting fuel into internal combustion engines
US3835829A (en) Fuel injection apparatus for internal combustion engines
US3921604A (en) Fuel injection apparatus for internal combustion engines
US3796205A (en) Fuel injection apparatus for internal combustion engines
US3779225A (en) Reciprocating plunger type fuel injection pump having electromagnetically operated control port
US3837324A (en) Fuel injection system for internal combustion engines
US4275693A (en) Fuel injection timing and control apparatus
US4170974A (en) High pressure fuel injection system
US5460329A (en) High speed fuel injector
US6199533B1 (en) Pilot valve controlled three-way fuel injection control valve assembly
US3759239A (en) Injection devices for compression-ignited internal combustion engines
US3796206A (en) Pump-and-nozzle assembly for injecting fuel in internal combustion engines
US4502445A (en) Delivery regulator for a fuel injection pump
US5651501A (en) Fluid damping of a valve assembly
US4418867A (en) Electrically controlled unit injector
EP0509954A1 (en) High pressure fuel injection system
GB1347488A (en) Liquid fuel injection pumping apparatus for an 'internal combustion engine
US4014305A (en) Fuel injection pumping apparatus
US3547092A (en) Liquid fuel pumping apparatus
GB1306422A (en) Fuel injection pumps for internal combustion engines
US4541394A (en) Fuel injection pump
GB2057720A (en) Fuel injection pump for internal combustion engines
US3177860A (en) Liquid fuel injection pumps for internal combustion engines
US5626119A (en) Fuel system