GB1187074A - Improvements in or relating to Fuel Injection Pumps for Internal Combustion Engines. - Google Patents

Improvements in or relating to Fuel Injection Pumps for Internal Combustion Engines.

Info

Publication number
GB1187074A
GB1187074A GB3218567A GB3218567A GB1187074A GB 1187074 A GB1187074 A GB 1187074A GB 3218567 A GB3218567 A GB 3218567A GB 3218567 A GB3218567 A GB 3218567A GB 1187074 A GB1187074 A GB 1187074A
Authority
GB
United Kingdom
Prior art keywords
valve
pass
ports
chamber
groove
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
GB3218567A
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 FR69949A priority Critical patent/FR1493671A/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1187074A publication Critical patent/GB1187074A/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
    • 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
    • F02M41/10Fuel-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
    • F02M41/12Fuel-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
    • F02M41/123Fuel-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
    • F02M41/125Variably-timed valves controlling fuel passages
    • F02M41/127Variably-timed valves controlling fuel passages valves being fluid-actuated slide-valves, e.g. differential rotary-piston pump

Abstract

1,187,074. Fuel injection pumps. ROBERT BOSCH G.m.b.H. July 13, 1967 [July 19, 1966], No.32185/67. Heading F1A. In a fuel injection pump of the type in which output is regulated by means of a by-pass or spill valve actuated by pressure generated by an auxiliary pump, return flow of the actuating liquid and hence the return of the valve towards its initial position being controlled by a throttle, a second by-pass passage is opened by the pump plunger before the by-pass valve opens, during conditions under which the by-pass valve returns to its initial position. The plunger 1 is reciprocated and rotated and comprises an injection portion 1a operating in an axially adjustable cylinder 2 and controlling inlet ports 46, a distributing portion 1C having a port 12 distributing to outlets 13 in succession and a portion 1b forming the auxiliary pump and having grooves 16 controlling the flow and return of actuating liquid to the by-pass valve 5 which regulates the spill from the chamber 3 via the passages 9, groove 6, passages 30a and 31 to the inlet chamber 11. The groove 6 also communicates with grooves 7 which appropriately connect with inlet 10 from chamber 11. The groove 6 also connects with a groove 33 towards the end of the plunger stroke providing a second spill or by-pass valve, groove 33 connecting via passage 32, normally open valve 34 and passage 32a with the chamber 11. Valve 34 is held open during normal running by pressure in the chamber 11 but during starting is held closed so that maximum fuel is delivered. The arrangement is such that the by-pass 6, 33 opens before the by-pass 30a, 30b when the valve 5 starts from its stop 28 or from a point closely adjacent thereto i.e. under low speed operation of the engine. In a modification Fig. 3 (not shown) the auxiliary pump chamber is by-passed through a passage throttled by the valve 34 during starting so that the valve 5 cannot be operated. Should the valve 34 stick the throttled aperture would allow the valve 5 to operate before excessive speed is reached. In a further modification Fig. 4 (not shown) the plunger portion 1a has ports which function as the second spill or by-pass, which ports co-operate with normally open ports in the cylinder 2. During starting these latter ports are closed by a spring pressed sleeve surrounding the cylinder 2 but which is raised to open the ports by the pressure from the feed pump.
GB3218567A 1966-07-19 1967-07-13 Improvements in or relating to Fuel Injection Pumps for Internal Combustion Engines. Expired GB1187074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR69949A FR1493671A (en) 1966-07-19 1966-07-19 Improvements in fuel injection pump flow regulation means

Publications (1)

Publication Number Publication Date
GB1187074A true GB1187074A (en) 1970-04-08

Family

ID=8613570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3218567A Expired GB1187074A (en) 1966-07-19 1967-07-13 Improvements in or relating to Fuel Injection Pumps for Internal Combustion Engines.

Country Status (5)

Country Link
US (1) US3403629A (en)
AT (1) AT283819B (en)
DE (1) DE1275328B (en)
FR (1) FR1493671A (en)
GB (1) GB1187074A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1922383A1 (en) * 1969-05-02 1970-11-19 Bosch Gmbh Robert Fuel injection pump for internal combustion engines
US3586039A (en) * 1969-05-09 1971-06-22 Henry N Brumm Diesel fuel pump regulator and r.p.m. control
DE1947529C3 (en) * 1969-09-19 1979-06-13 Robert Bosch Gmbh, 7000 Stuttgart
FR2071175A5 (en) * 1969-12-19 1971-09-17 Peugeot
US4050856A (en) * 1974-03-22 1977-09-27 Diesel Kiki Co., Ltd. Dash pot arrangement for distribution-type fuel injection pump cut off barrel
DE2449333A1 (en) * 1974-10-17 1976-04-29 Bosch Gmbh Robert FUEL INJECTION PUMP FOR COMBUSTION MACHINES
JPH0541262Y2 (en) * 1985-04-17 1993-10-19

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079862A (en) * 1958-11-07 1963-03-05 Prec Mecanique Labinal Soc Piston pumps, in particular for the injection of fuel into internal combustion engines
FR1297903A (en) * 1961-05-26 1962-07-06 Improvements in self-regulation of the flow rate of reciprocating pumps, in particular for fuel injection into engines
US3339534A (en) * 1964-12-22 1967-09-05 Bosch Gmbh Robert Fuel injection reciprocating pumps
US3358662A (en) * 1965-01-05 1967-12-19 Bosch Gmbh Robert Reciprocating fuel injection pumps including means for varying the advance of injection
FR1439198A (en) * 1965-04-07 1966-05-20 Bosch Gmbh Robert Improvements to piston-distributor fuel injection pumps
DE1249013B (en) * 1965-05-14 1967-08-31 Robert Bosch Gmbh, Stuttgart Fuel injection pump for internal combustion engines
FR1450727A (en) * 1965-07-12 1966-06-24 Bosch Gmbh Robert Improvements made to the means of regulating fuel injection pumps

Also Published As

Publication number Publication date
FR1493671A (en) 1967-09-01
DE1275328B (en) 1968-08-14
US3403629A (en) 1968-10-01
AT283819B (en) 1970-08-25

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees