GB1425875A - Fuel injection pump for an internal combustion engine - Google Patents
Fuel injection pump for an internal combustion engineInfo
- Publication number
- GB1425875A GB1425875A GB5610673A GB5610673A GB1425875A GB 1425875 A GB1425875 A GB 1425875A GB 5610673 A GB5610673 A GB 5610673A GB 5610673 A GB5610673 A GB 5610673A GB 1425875 A GB1425875 A GB 1425875A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- shaft
- cam
- plunger
- velocity
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
-
- 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
-
- 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
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type 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
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/361—Valves being actuated mechanically
-
- 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
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/361—Valves being actuated mechanically
- F02M59/362—Rotary valves
- F02M59/363—Rotary valves arrangements for adjusting the rotary valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
- F02D2700/02—Controlling by changing the air or fuel supply
- F02D2700/0269—Controlling by changing the air or fuel supply for air compressing engines with compression ignition
- F02D2700/0282—Control of fuel supply
- F02D2700/0284—Control of fuel supply by acting on the fuel pump control element
- F02D2700/0287—Control of fuel supply by acting on the fuel pump control element depending on several parameters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
1425875 Fuel injection pumps; starting and regulating IC engine fuel injection FORD MOTOR CO Ltd 4 Dec 1973 [26 Dec 1972] 56106/73 Headings F1A and FIB In a fuel injection pump comprising a plurality of pumping plungers 50 reciprocated by a rotatable face cam 34 in respective bores 52 each having a valve controlled spill port 58, the actuating surface of the cam 34 is contoured to provide for a rate of plunger displacement (i.e. velocity) which does not decrease as the cam surface passes through the angular position of 90 degrees before top dead centre. In a conventional pump having a flat swash-plate surface, the 90 degrees B.T.D.C. plunger position corresponds to the point in the sinusoidal rate of displacement curve at which the rate reaches a maximum and then decreases. Thus with the known pump during injection timing advance with increasing engine speed, depending on the degree of advance, the spill ports 58 are sometimes closed when the plunger velocity is increasing and sometimes when it is decreasing. This causes the plunger to deliver a different quantity, depending on the timing, for the same period that the spill ports are open. By providing the cam surface with a contour which produces a constantly increasing plunger velocity over all or almost all of the range of spill port closure the above described variation delivery is avoided. The cam surface 36 is therefore contoured to produce a rapidly increasing plunger velocity (a), Fig. 12B (not shown) from between e.g. 180 degrees and 150 degrees B.T.D.C.; a steadily increasing velocity (b) to around 40 degrees B.T.D.C.; and finally a rapidly decreasing velocity (c) up to T.D.C. The feet 53 of the plungers have cylindrical surfaces whereby they make line contact with the cam surface 36. In order to maintain the axes of the cylindrical surfaces of the feet 53 perpendicular to the axis of rotation of the cam 34, the plungers are provided with flats which slidably engage complementary flat surfaces (55') of holes (55) in a fixed plate 54 through which the plungers pass. Opening and closing of the spill ports is controlled by a control edge 72 on a valve sleeve 70 axially and angularly movable with respect to a shaft 82 keyed for drive with the cam 34. Movement of the valve sleeve 70 is in response to the action of a centrifugal governor 122, a diaphragm 136 responsive to engine manifold pressure and an auxiliary fuel control shut-off knob 141, the latter being' movable to a position in which it lowers the shaft 82 and sleeve 70 to a position in which the spill ports are uncovered at all times. At engine start-up, the accelerator pedal 128 is fully depressed whereby the pressure in the inlet manifold 133 allows the diaphragm 136 to raise, via linkage 137, 138, 96, 95, the shaft 82. This causes closure of the spill ports 58 for almost the entire rotation of the valve 70 to provide excess fuel for starting. After start-up the release of the pedal 128 to its engine idle position causes lowering of the shaft 82 and simultaneously downward movement of the valve 70 relative to the shaft 82 due to the governor weights 124 overcoming the force of a spring 97. If the pedal 128 is now depressed, the decreased vacuum raises the shaft 82 and valve 70 to increase the delivery, the effect of the governor becoming inoperative when the upper idle speed is exceeded since the valve 70 abuts a stop 99. Accordingly delivery becomes solely under the control of the pedal 128. At a predetermined speed e.g. 2,400 r.p.m. the centrifugal governor 122 overcomes the force of a spring 114 whereby a sleeve 100 keyed to the valve 70 moves downwardly and a pin 108 fixed to the shaft 82 enters an inclined slot 112 in the sleeve 100, the resulting relative rotation between the valve 70 and the shaft causing an advance in the timing of injection.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00318297A US3856438A (en) | 1972-12-26 | 1972-12-26 | Fuel injection pump |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1425875A true GB1425875A (en) | 1976-02-18 |
Family
ID=23237559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5610673A Expired GB1425875A (en) | 1972-12-26 | 1973-12-04 | Fuel injection pump for an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US3856438A (en) |
JP (1) | JPS5425569B2 (en) |
CA (1) | CA987560A (en) |
DE (1) | DE2362526A1 (en) |
GB (1) | GB1425875A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2907279A1 (en) * | 1979-02-24 | 1980-08-28 | Inst Motorenbau Prof Huber E V | Fuel injection system for IC engine - has electromagnetic control elements feeding fuel from common chamber to individual nozzle |
DE2909307A1 (en) * | 1979-03-09 | 1980-09-18 | Inst Motorenbau Prof Huber E V | IC engine fuel injection system - has single continuously running metering pump supplying common chamber for all injection nozzles |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5047031A (en) * | 1973-08-29 | 1975-04-26 | ||
US4197059A (en) * | 1978-07-26 | 1980-04-08 | Ford Motor Company | Fuel injection pump having means for retarding the fuel injection timing schedule |
US4301777A (en) * | 1979-11-28 | 1981-11-24 | General Motors Corporation | Fuel injection pump |
US4530331A (en) * | 1984-03-27 | 1985-07-23 | Caterpillar Tractor Co. | Thrust and planetary gear coupling for a rotor of a distributor fuel injection pump |
US5931644A (en) * | 1995-03-30 | 1999-08-03 | Caterpillar Inc. | Precision demand axial piston pump with spring bias means for reducing cavitation |
WO2014091266A1 (en) * | 2012-12-10 | 2014-06-19 | Kongsberg Automotive Ab | Unitary fluid flow apparatus for inflating and deflating a device |
US11401883B2 (en) * | 2020-04-03 | 2022-08-02 | Ford Global Technologies, Llc | System and method for direct injection fuel pump control |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2061144A (en) * | 1932-04-12 | 1936-11-17 | Stoutz Robert De | Piston spinning pump |
US2992619A (en) * | 1950-08-05 | 1961-07-18 | William C Nilges | Fluid pumps, motors and methods therefor |
US2775210A (en) * | 1951-04-10 | 1956-12-25 | Scintilla Ltd | Piston pump |
US2882831A (en) * | 1954-06-17 | 1959-04-21 | Gen Electric | Constant flow positive displacement mechanical hydraulic unit |
US3046950A (en) * | 1958-01-22 | 1962-07-31 | Whiting Corp | Constant mechanical advantage rotary hydraulic device |
US3045604A (en) * | 1960-05-04 | 1962-07-24 | Fmc Corp | Multi-cylinder pump |
US3319568A (en) * | 1965-07-16 | 1967-05-16 | Ford Motor Co | Fuel injection pump assembly |
GB1255006A (en) * | 1968-03-22 | 1971-11-24 | Nat Res Dev | Hydraulic piston and cylinder machines |
-
1972
- 1972-12-26 US US00318297A patent/US3856438A/en not_active Expired - Lifetime
-
1973
- 1973-09-18 CA CA181,381A patent/CA987560A/en not_active Expired
- 1973-12-04 GB GB5610673A patent/GB1425875A/en not_active Expired
- 1973-12-11 JP JP13746573A patent/JPS5425569B2/ja not_active Expired
- 1973-12-15 DE DE2362526A patent/DE2362526A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2907279A1 (en) * | 1979-02-24 | 1980-08-28 | Inst Motorenbau Prof Huber E V | Fuel injection system for IC engine - has electromagnetic control elements feeding fuel from common chamber to individual nozzle |
DE2909307A1 (en) * | 1979-03-09 | 1980-09-18 | Inst Motorenbau Prof Huber E V | IC engine fuel injection system - has single continuously running metering pump supplying common chamber for all injection nozzles |
Also Published As
Publication number | Publication date |
---|---|
JPS5425569B2 (en) | 1979-08-29 |
CA987560A (en) | 1976-04-20 |
DE2362526A1 (en) | 1974-06-27 |
JPS4989017A (en) | 1974-08-26 |
US3856438A (en) | 1974-12-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |