GB1122886A - Improvements in fuel injection pumps for internal combustion engines - Google Patents

Improvements in fuel injection pumps for internal combustion engines

Info

Publication number
GB1122886A
GB1122886A GB2147167A GB2147167A GB1122886A GB 1122886 A GB1122886 A GB 1122886A GB 2147167 A GB2147167 A GB 2147167A GB 2147167 A GB2147167 A GB 2147167A GB 1122886 A GB1122886 A GB 1122886A
Authority
GB
United Kingdom
Prior art keywords
chamber
pistons
cylinder
valve
pressure
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
Application number
GB2147167A
Inventor
Pierre Bessiere
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 to FR60770A priority Critical patent/FR1491304A/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1122886A publication Critical patent/GB1122886A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20Varying fuel delivery in quantity or timing
    • F02M59/36Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/365Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages valves being actuated by the fluid pressure produced in an auxiliary pump, e.g. pumps with differential pistons; Regulated pressure of supply pump actuating a metering valve, e.g. a sleeve surrounding the pump piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08Fuel-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
    • F02M41/14Fuel-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
    • F02M41/1405Fuel-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
    • F02M41/1411Fuel-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

Abstract

1,122,886. Fuel injection pumps. ROBERT BOSCH G.m.b.H. May 9, 1967 [May 9, 1966], No.21471/67. Heading F1A. In a fuel injection pump of the type in which a spill valve is actuated by liquid delivered by an auxiliary pump, the cam drive of the auxiliary pump pistons is ineffective at start-up speeds. In the embodiment shown in Fig. 1 a rotary pump head 4 has an injection pump cylinder 8 and an auxiliary pump cylinder 9 and is combined with a rotary valve and distributer 3. The cylinder 8 is connected to a bore 18 terminating in a groove 19 connected with inlet grooves 20 and an outlet groove 22; the bore 18 also connects with a groove 42 in communication with a passage 33 leading to the cylinder of the spill valve 15. A groove 28 connects by passages 29 with the cylinder 9 and by passages 39 and throttle passage 40 with the actuating chamber 32 of the spill valve 15. The groove 28 and hence the cylinder 9 is connected on the suction stroke of the auxiliary pump to an inlet 26 and through a valve 31 to the chamber 32, by the grooves 27. The inlet chamber 7 is fed by feed pump 45 with liquid at a pressure variable with speed. Fuel passes through a pressure maintenance valve 52 to a chamber 55 to lubricate the cam mechanism and passes from the chamber 55 through a pressure maintenance valve 56. One of the auxiliary pump pistons 16 has a spring 58 therein which engages the tappet 11 so that without pressure in the inlet chamber 7 and cylinder 9 the pistons 16, 16a engage and reciprocate together so that no pressure is generated to operate the valve 15 is that maximum fuel is delivered. When pressure builds up in the chamber 7 and cylinder 9 the pistons 16, 16a are pushed into engagement with their cam followers and liquid is delivered to the chamber 32 of the valve 15 to regulate the spill. In a modification, Fig. 4, the auxiliary pump chamber 25a is formed in one of the injection pump pistons 10a and the auxiliary pump piston 16b is disposed in coaxial bores in the pistons 10a, 10b, a spring 58a being disposed between the pistons 10b and 16b. In addition to the spring loading the auxiliary pistons 16, 16b are subjected to the pressure in the chamber 55 which pressure may be varied by setting the valves 52, 56, so that the point of delivery by the auxiliary pump may be varied.
GB2147167A 1966-05-09 1967-05-09 Improvements in fuel injection pumps for internal combustion engines Expired GB1122886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR60770A FR1491304A (en) 1966-05-09 1966-05-09 Improvements to reciprocating fuel injection pumps

Publications (1)

Publication Number Publication Date
GB1122886A true GB1122886A (en) 1968-08-07

Family

ID=8608129

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2147167A Expired GB1122886A (en) 1966-05-09 1967-05-09 Improvements in fuel injection pumps for internal combustion engines

Country Status (3)

Country Link
DE (1) DE1576281A1 (en)
FR (1) FR1491304A (en)
GB (1) GB1122886A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343759A1 (en) * 1988-05-27 1989-11-29 LUCAS INDUSTRIES public limited company Fuel injection pumping apparatus
EP0364076A2 (en) * 1988-10-11 1990-04-18 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0382388A1 (en) * 1989-02-09 1990-08-16 Lucas Industries Public Limited Company Fuel injection pump
EP0383546A2 (en) * 1989-02-17 1990-08-22 LUCAS INDUSTRIES public limited company Fuel injection pump
EP0423957A1 (en) * 1989-10-18 1991-04-24 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0423958A1 (en) * 1989-10-18 1991-04-24 Lucas Industries Public Limited Company Fuel pumping apparatus
GB2238084A (en) * 1989-10-18 1991-05-22 Lucas Ind Plc Fuel pumping apparatus
GB2239058A (en) * 1989-11-23 1991-06-19 Lucas Ind Plc Fuel pumping apparatus
GB2239057A (en) * 1989-11-23 1991-06-19 Lucas Ind Plc Fuel pumping apparatus
EP0438893A1 (en) * 1990-01-25 1991-07-31 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0471436A1 (en) * 1990-07-28 1992-02-19 Lucas Industries Public Limited Company Fuel pumping apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3567485B2 (en) * 1994-05-13 2004-09-22 株式会社デンソー Fuel injection pump

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343759A1 (en) * 1988-05-27 1989-11-29 LUCAS INDUSTRIES public limited company Fuel injection pumping apparatus
EP0364076A2 (en) * 1988-10-11 1990-04-18 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0364076A3 (en) * 1988-10-11 1990-09-19 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0382388A1 (en) * 1989-02-09 1990-08-16 Lucas Industries Public Limited Company Fuel injection pump
US5080563A (en) * 1989-02-17 1992-01-14 Lucas Industries Fuel pumping apparatus
EP0383546A2 (en) * 1989-02-17 1990-08-22 LUCAS INDUSTRIES public limited company Fuel injection pump
EP0383546A3 (en) * 1989-02-17 1991-02-27 LUCAS INDUSTRIES public limited company Fuel injection pump
EP0423957A1 (en) * 1989-10-18 1991-04-24 Lucas Industries Public Limited Company Fuel pumping apparatus
EP0423958A1 (en) * 1989-10-18 1991-04-24 Lucas Industries Public Limited Company Fuel pumping apparatus
GB2238084A (en) * 1989-10-18 1991-05-22 Lucas Ind Plc Fuel pumping apparatus
GB2239057A (en) * 1989-11-23 1991-06-19 Lucas Ind Plc Fuel pumping apparatus
GB2239058A (en) * 1989-11-23 1991-06-19 Lucas Ind Plc Fuel pumping apparatus
EP0438893A1 (en) * 1990-01-25 1991-07-31 Lucas Industries Public Limited Company Fuel pumping apparatus
US5203303A (en) * 1990-01-25 1993-04-20 Lucas Industries Fuel pumping apparatus
EP0471436A1 (en) * 1990-07-28 1992-02-19 Lucas Industries Public Limited Company Fuel pumping apparatus
US5101798A (en) * 1990-07-28 1992-04-07 Lucas Industries Fuel pumping apparatus

Also Published As

Publication number Publication date
FR1491304A (en) 1967-08-11
DE1576281A1 (en) 1970-03-26

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