US3724436A - Fuel feed control device for internal combustion engines - Google Patents
Fuel feed control device for internal combustion engines Download PDFInfo
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- US3724436A US3724436A US00127203A US3724436DA US3724436A US 3724436 A US3724436 A US 3724436A US 00127203 A US00127203 A US 00127203A US 3724436D A US3724436D A US 3724436DA US 3724436 A US3724436 A US 3724436A
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- fuel
- pump
- fuel injection
- valve
- engine
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- 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
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- 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
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
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- 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
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- 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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
- F02M2700/1317—Fuel pumpo for internal combustion engines
- F02M2700/1358—Fuel pump with control of fuel inlet to the pumping chamber
Definitions
- a fuel feed control device for internal combustion engines having a fuel supply source for supplying fuel at Cl 123/32 123/140 MC an optional predetermined pressure and a fuel injec- ..F02m tiQn pump for feeding the pressurized fuel to fuel in- Fleld 0f Search-12352 32 AB, 139 R, jection valves mounted in an engine, and further hav- 3 BD, 139 E ing a valve disposed directly in the pump chamber of said pump in communication with said fuel supply [56] References Cited source and opened and closed by electric signals, the quantity of fuel discharged from said fuel injection UNITED STATES PATENTS pump and the period of discharge being regulated by 3,516,395 6/1970 Bassotetal ..123/139R controlling the current conducting time and current 3,568,646 3/1971 Wehde ..l23/139 E Conducting period to said valve.
- the object of the present invention is to provide a fuel feed control device in whichfeeding of fuel is controlled by mechanical means which undergoes less mechanical restrictions and fuel is fed directly into the pump chamber of a fuel feed pump, whereby the device can meet the demand of the engine more freely and accurately than the prior art devices.
- a fuel feed control device for internal combustion engines, which has a fuel supply source for supplying fuel at an optional predetermined pressure and a fuel injection pump for feeding the pressurized fuel to fuel injection valves mounted in an engine, and further having a valve disposed directly in the pump chamber of said pump in communication with said fuel supply source and opened and closed by electric signals, the quantity of fuel discharged from said fuel injection pump and the period of discharge being regulated by controlling the current conducting time and current conducting period to said valve.
- the quantity of fuel fed to the engine and the period of fuel injection are regulated by mechanical means, such as a centrifugal weight and a link mechanism, and therefore, the regulating operation is subjected to various restrictions.
- the fuel feed controlling operation is effected entirely by electronical means, so that there can be obtained a great advantage that the feeding of fuel can be controlled with an accuracy sufficient to meet the demand of the engine.
- the valve which is opened and closed by electrical means is provided directly in the pump chamber of the fuel injection pump, there can also be obtained such practical advantage that an accurate fuel metering and every excellent response characteristic of fuel feeding operation can be obtained and the current conducting period to the valve can be set to be sufficiently long.
- FIG. 1 is a diagrammatic illustration showing the entire fuel feed control device according to the invention.
- FIG. 2 is a cross-sectional view showing the details of the essential portion of the fuel feed control device.
- reference numeral 1 designates a fuel tank, and fuel oil in said tank 1 is fed to an electromagnetic valve 4 through a filter 2 by a fuel pump 3.
- the pressure of the fuel oil supplied to the electromagnetic valve 4 is maintained at an optional predetermined value by a pressure regulator 5.
- Reference numeral 6 designates a main body of a distribution type fuel injection pump, and 7 designates a driving shaft thereof, which is driven from an engine not shown.
- the fuel injection pump delivers the fuel oil to discharge valves 8n at suitable times, during one revolution of the driving shaft 7.
- Reference numeral 12 designates a detector to detect the position of an accelerator pedal, the temperatures at various portions, the rate of rotation of the engine, etc.
- 13 designates an electronic controller for setting the time and duration of current conducted to the electromagnetic valve 4, which controls the quantity of fuel oil to be fed by the current conducting period to the electromagnetic valve 4 and the fuel oil injection time by the current conducting time to said electromagnetic valve, in response to various electric signals.
- reference numeral 14 designates a plunger of the distribution type fuel injection pump which makes a predetermined reciprocal motion while being rotated through the driving shaft 7 and a cam disc not shown, to deliver with pressure the fuel to the respective cylinders, i.e., the respective discharge valves 8a 8n, of the engine in the direction of the arrow a and suck fuel.
- Reference numerals 15, 16 designate cylinders in which the plunger 14 is slidably received.
- Reference numeral 4 indicates the electromagnetic valve to which the fuel maintained at the predetermined pressure by the pressure regulator is supplied in the direction of the arrow b.
- a valve member 4a is located at the head of the cylinder 16 and disposed directly in the pump chamber 17.
- the fuel is delivered from the fuel injection pump to the respective discharge valves 8a 8n through a discharge port 18 provided in the plunger 14 and discharge ports 19 provided in the cylinder 15, the number of said discharge ports 19 being the same as the number of the cylinders of the engine.
- Reference numeral 20 designates an overflow port formed through the cylinder 16 to set the end of the fuel injection period
- 21 designates overflow passages formed radially in the plunger 14.
- the discharge port 18 and the overflow passages 21 of the plunger 14 are communicated with the pump chamber 17 through an axial bore 22.
- the fuel feed control device of the invention constructed as described above operates in the following manner: Namely, the fuel sucked from the fuel tank 1 by the fuel pump 3 through the filter 2 is constantly maintained at the predetermined pressure by the pressure regulator 5 and the fuel overflowing said pressure regulator is returned to said fuel tank 1.
- the opening or closing of the electromagnetic valve 4 is efiected by an electric signal from the electronic controller 13 which emits said electric signal upon receiving signals from the detector 12 indicative of the position of the accelerator pedal, the temperatures at various portions, the rate of rotation of the engine, etc., (by which the proper fuel injection time for each cylinder is detected) which are electrically detected by said detector 12.
- the pressurized fuel within the pump chamber 17 flows out of the pump through said overflow passages 21 and said overflow port 20 as indicated by the arrow e and thus the end of the fuel injection period can be positively set.
- the above-described cycle of operation is repeated incident to the rotational and reciprocal motion of the plunger 14.
- the quantity of fuel discharged from the fuel injection pump that is, the quantity of fuel to be injected, is determined by the opening period of the valve member 4a which is disposed directly in the pump chamber 17 of the fuel injection pump and operated completely electrically.
- the quantity of fuel can be controlled by the period of conducting the current through the coil 4b of the valve 4. Namely, by suitably selecting the current conducting period to the coil 4b by the electronic controller 13 upon electrically detecting the various operational-conditions of the engine, e.g., the rate of rotation, the load, the temperatures at various portions, etc., of the engine, it is possible to feed an optimum quantity of fuel demanded by the engine.
- the various operational-conditions of the engine e.g., the rate of rotation, the load, the temperatures at various portions, etc.
- valve member 4a is disposed directly in the pump chamber 17 of the fuel injection pump as stated above, the fuel metered by said valve member 4a can accurately be supplied into the pump chamber 17 with no time delay, on every opening operation of the valve member, and the fuel-supply period (the current conducting period to the coil 4b) can be selected within a wide range.
- the fuel injecting time a proper fuel injecting time as demanded by the engine can be set electrically freely by electrically detecting the above-mentioned various operational conditions of the engine and properly selecting the current conducting time to the coil 4b by the electronic controller 13.
- the fuel feed control device has a fuel supply source for supplying fuel at an optional predetermined pressure and a fuel injection pump for feeding the pressurized fuel to fuel injection valves mounted in an engine, and further having a valve disposed directly in the pump chamber of said pump in communication with said fuel supply source and opened and closed by electric signals; and the quantity of fuel discharged from said fuel injection pump and the period of discharge are regulated by controlling the current conducting time and the period of discharge to said valve. Therefore,
- the quantity of fuel fed to the engine and the fuel injection period can be controlled completely. electrically, without undergoing various restrictions which have been imposed on the prior art devices due to the use of mechanical means such as a centrifugal weight, a link mechanism, etc., and a fuel feed control sufficient to meet the demand of the engine can be achieved. Further, according to the invention, since the electrically operated valve is disposed directly in the pump chamber of the fuel injection pump, there can be obtained such practical advantage that a highly accurate metering of fuel and excellent response characteristic of the fuel feeding operation can be obtained and the current conducting period to the valve can be set sufficiently long.
- the present invention can of course be applied, not only to the distribution type pump as described and illustrated herein but also to an in-line type pump, but the application of the invention to the distribution type pump is particularly advantageous in that only one electrically operative valve sufiice the purpose irrespective of the number of cylinders of the engine.
- a fuel feed control device for internal combustion engines comprising:
- fuel supply source means for supplying predetermined pressure
- fuel injection pump means for feeding the pressurized fuel to fuel injection valves mounted in the engine
- an electromagnetic valve secured to said fuel injection pump and having a valve member provided with a seating portion, a valve seat, a movable core and a coil, and said seating fuel at a to said coil, so that the quantity of fuel discharged from said fuel injection pump and the period of the discharge are regulated by controlling the timing and the length of time for conducting current to said coil of said electromagnetic valve.
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- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A fuel feed control device for internal combustion engines, having a fuel supply source for supplying fuel at an optional predetermined pressure and a fuel injection pump for feeding the pressurized fuel to fuel injection valves mounted in an engine, and further having a valve disposed directly in the pump chamber of said pump in communication with said fuel supply source and opened and closed by electric signals, the quantity of fuel discharged from said fuel injection pump and the period of discharge being regulated by controlling the current conducting time and current conducting period to said valve.
Description
I Umted States Patent 1 1 [111 3,724,436 Nagata et a1. 1 Apr. 3, 1973 54 FUEL FEED CONTROL DEVICE FOR 3,575,145 4 1971 Steiger ..123/32 EA INTERNAL COMBUSTION ENGINES 3,587,535 6/1971 Kimberley ..l23/32 AE 3,058,455 10/1962 Hofer et a1. ..l23/139 BD [75] lnvemols: Semi" i Nagoya; 03ml" 2,935,061 5/1960 V011 et a1. ..123/139 BD 8 Karlya; Nobuhim 1,664,610 4/1928 French ..123/32 AE y all of Japan 2,863,437 12/1958 Bessiere ..123 32 AB 2,598,528 5/1952 French v ..123/l39 E [73 1 Ass'gnee' N'ppondenso 2,077,259 4 1937 Planiol ..123 139 E Japan 1 [22] Filed: Mar. 23, 1971 Primary ExaminerLaurence M. Goodridge Assistant Examiner-Cort R. Flint 21 A LN 127 20 1 PP 3 Attorney-Cushman, Darby & Cushman [30] Foreign Application Priority Data [57] ABSTRACT Apr. 2, 1970 Japan ..45/28031 A fuel feed control device for internal combustion engines, having a fuel supply source for supplying fuel at Cl 123/32 123/140 MC an optional predetermined pressure and a fuel injec- ..F02m tiQn pump for feeding the pressurized fuel to fuel in- Fleld 0f Search-12352 32 AB, 139 R, jection valves mounted in an engine, and further hav- 3 BD, 139 E ing a valve disposed directly in the pump chamber of said pump in communication with said fuel supply [56] References Cited source and opened and closed by electric signals, the quantity of fuel discharged from said fuel injection UNITED STATES PATENTS pump and the period of discharge being regulated by 3,516,395 6/1970 Bassotetal ..123/139R controlling the current conducting time and current 3,568,646 3/1971 Wehde ..l23/139 E Conducting period to said valve. 3,592,177 7/1971 Wehde "123/139 E 1 Claim, 2 Drawing Figures 5 PRESS REG S3 FUEL PUMP 2 ELECWPON/C I ca/vr PATENTED 3 I95 5 PRESS PEG 3 FUEL PUMP ELEC77P0/V/C CONT LECTOP INVENTORS S 41; 11% IR O ju-fl' W 9 ATTORNEY 5 FUEL FEED CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES BACKGROUND OF THE INVENTION engines, there has generally been used an in-line type pump having the same number of reciprocating pump units as the number of the cylinders of an enginearranged side by side each for each cylinder, or a distribution type pump having one rotatable and reciprocable plunger by which fuel is fed with pressure and distributed to the respective cylinders of an engine at desired times.
In such prior art devices, however, the quantity of fuel required by the engine is controlled by a combination of mechanical elements, such as a centrifugal governor utilizing centrifugal force, a throttle valve, etc., and the fuel injection time is controlled by mechanically deviating the phases of the crank shaft of the engine and the pump driving shaft. Therefore, these devices have the problem that the mechanical construction thereof inevitably undergoes various restrictions and the demand of the engine cannot be fully satisfied.
SUMMARY OF THE INVENTION The object of the present invention is to provide a fuel feed control device in whichfeeding of fuel is controlled by mechanical means which undergoes less mechanical restrictions and fuel is fed directly into the pump chamber of a fuel feed pump, whereby the device can meet the demand of the engine more freely and accurately than the prior art devices.
According to the present invention there is provided a fuel feed control device for internal combustion engines, which has a fuel supply source for supplying fuel at an optional predetermined pressure and a fuel injection pump for feeding the pressurized fuel to fuel injection valves mounted in an engine, and further having a valve disposed directly in the pump chamber of said pump in communication with said fuel supply source and opened and closed by electric signals, the quantity of fuel discharged from said fuel injection pump and the period of discharge being regulated by controlling the current conducting time and current conducting period to said valve.
In the prior art devices, the quantity of fuel fed to the engine and the period of fuel injection are regulated by mechanical means, such as a centrifugal weight and a link mechanism, and therefore, the regulating operation is subjected to various restrictions. However, according to the present invention the fuel feed controlling operation is effected entirely by electronical means, so that there can be obtained a great advantage that the feeding of fuel can be controlled with an accuracy sufficient to meet the demand of the engine. Furthermore, since according to the invention the valve which is opened and closed by electrical means is provided directly in the pump chamber of the fuel injection pump, there can also be obtained such practical advantage that an accurate fuel metering and every excellent response characteristic of fuel feeding operation can be obtained and the current conducting period to the valve can be set to be sufficiently long.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatic illustration showing the entire fuel feed control device according to the invention, and
FIG. 2 is a cross-sectional view showing the details of the essential portion of the fuel feed control device.
DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention will be described hereinafter with reference to an embodiment comprising a distribution type pump. In FIG. 1, reference numeral 1 designates a fuel tank, and fuel oil in said tank 1 is fed to an electromagnetic valve 4 through a filter 2 by a fuel pump 3. In this case, the pressure of the fuel oil supplied to the electromagnetic valve 4 is maintained at an optional predetermined value by a pressure regulator 5. Reference numeral 6 designates a main body of a distribution type fuel injection pump, and 7 designates a driving shaft thereof, which is driven from an engine not shown. The fuel injection pump delivers the fuel oil to discharge valves 8n at suitable times, during one revolution of the driving shaft 7. The fuel oil from the respective discharge valves is introduced into fuel injection valves 10a 10n through pressure pipes 9a 9n and injected into the combustion chambers of an engine from said respective fuel injection valves. Reference numeral 12 designates a detector to detect the position of an accelerator pedal, the temperatures at various portions, the rate of rotation of the engine, etc., and 13 designates an electronic controller for setting the time and duration of current conducted to the electromagnetic valve 4, which controls the quantity of fuel oil to be fed by the current conducting period to the electromagnetic valve 4 and the fuel oil injection time by the current conducting time to said electromagnetic valve, in response to various electric signals.
Turning now to FIG. 2, reference numeral 14 designates a plunger of the distribution type fuel injection pump which makes a predetermined reciprocal motion while being rotated through the driving shaft 7 and a cam disc not shown, to deliver with pressure the fuel to the respective cylinders, i.e., the respective discharge valves 8a 8n, of the engine in the direction of the arrow a and suck fuel. Reference numerals 15, 16 designate cylinders in which the plunger 14 is slidably received. Reference numeral 4 indicates the electromagnetic valve to which the fuel maintained at the predetermined pressure by the pressure regulator is supplied in the direction of the arrow b. A valve member 4a is located at the head of the cylinder 16 and disposed directly in the pump chamber 17. The fuel is delivered from the fuel injection pump to the respective discharge valves 8a 8n through a discharge port 18 provided in the plunger 14 and discharge ports 19 provided in the cylinder 15, the number of said discharge ports 19 being the same as the number of the cylinders of the engine. Reference numeral 20 designates an overflow port formed through the cylinder 16 to set the end of the fuel injection period, and 21 designates overflow passages formed radially in the plunger 14. The discharge port 18 and the overflow passages 21 of the plunger 14 are communicated with the pump chamber 17 through an axial bore 22.
The fuel feed control device of the invention constructed as described above operates in the following manner: Namely, the fuel sucked from the fuel tank 1 by the fuel pump 3 through the filter 2 is constantly maintained at the predetermined pressure by the pressure regulator 5 and the fuel overflowing said pressure regulator is returned to said fuel tank 1. On the other hand, the opening or closing of the electromagnetic valve 4 is efiected by an electric signal from the electronic controller 13 which emits said electric signal upon receiving signals from the detector 12 indicative of the position of the accelerator pedal, the temperatures at various portions, the rate of rotation of the engine, etc., (by which the proper fuel injection time for each cylinder is detected) which are electrically detected by said detector 12. When a current is conducted through the coil 4b of the electromagnetic valve 4 from the electronic controller 13, a movable core 40 is moved in the direction of the arrow d by a magnetic drag exerted thereon and depresses the valve member 4a against the biasing force of a spring 4d. The seating portion 4e of the valve member 4a is thus detached from a valve seat 4f and the fuel oil flows into the pump 6 in the direction of the arrow b. In this case, since the valve member 4a is disposed directly in the pump chamber 17, the fuel oil entering the pump 6 in the direction of the arrow b is directly metered and stored in said pump chamber 17 without going through any other passage. Now, when the current supply to the coil 4b of the electromagnetic valve 4 is interrupted, the seating portion 4ev of the valve member 4a closes the valve opening and the plunger 14 is moved upward in the direction of the arrow c, whereby a compression stroke sets in. The pressurized fuel oil, when the discharge port 18 in the plunger 14 is brought into communication with the discharge ports 19 in the cylinder 15, is discharged through said discharge ports 18, 19 and the discharge valves 8a 8n in the direction of the arrow a, to flow into the injection valves 10a 10n through the pressure pipes 9a 9n, and injected into the combustion chambers 11 of the engine from said respective injection valves 10a 10n. As the plunger 14 further rises and when the radial overflow passages 21 formed therein are brought into communi cation with the overflow port in the cylinder 16, the pressurized fuel within the pump chamber 17 flows out of the pump through said overflow passages 21 and said overflow port 20 as indicated by the arrow e and thus the end of the fuel injection period can be positively set. The above-described cycle of operation is repeated incident to the rotational and reciprocal motion of the plunger 14. The quantity of fuel discharged from the fuel injection pump, that is, the quantity of fuel to be injected, is determined by the opening period of the valve member 4a which is disposed directly in the pump chamber 17 of the fuel injection pump and operated completely electrically. Therefore, it will be understood that the quantity of fuel can be controlled by the period of conducting the current through the coil 4b of the valve 4. Namely, by suitably selecting the current conducting period to the coil 4b by the electronic controller 13 upon electrically detecting the various operational-conditions of the engine, e.g., the rate of rotation, the load, the temperatures at various portions, etc., of the engine, it is possible to feed an optimum quantity of fuel demanded by the engine. In addition, since the valve member 4a is disposed directly in the pump chamber 17 of the fuel injection pump as stated above, the fuel metered by said valve member 4a can accurately be supplied into the pump chamber 17 with no time delay, on every opening operation of the valve member, and the fuel-supply period (the current conducting period to the coil 4b) can be selected within a wide range. As for the fuel injecting time, a proper fuel injecting time as demanded by the engine can be set electrically freely by electrically detecting the above-mentioned various operational conditions of the engine and properly selecting the current conducting time to the coil 4b by the electronic controller 13.
As described above, the fuel feed control device according to the invention has a fuel supply source for supplying fuel at an optional predetermined pressure and a fuel injection pump for feeding the pressurized fuel to fuel injection valves mounted in an engine, and further having a valve disposed directly in the pump chamber of said pump in communication with said fuel supply source and opened and closed by electric signals; and the quantity of fuel discharged from said fuel injection pump and the period of discharge are regulated by controlling the current conducting time and the period of discharge to said valve. Therefore,
according to the invention the quantity of fuel fed to the engine and the fuel injection period can be controlled completely. electrically, without undergoing various restrictions which have been imposed on the prior art devices due to the use of mechanical means such as a centrifugal weight, a link mechanism, etc., and a fuel feed control sufficient to meet the demand of the engine can be achieved. Further, according to the invention, since the electrically operated valve is disposed directly in the pump chamber of the fuel injection pump, there can be obtained such practical advantage that a highly accurate metering of fuel and excellent response characteristic of the fuel feeding operation can be obtained and the current conducting period to the valve can be set sufficiently long. The present invention can of course be applied, not only to the distribution type pump as described and illustrated herein but also to an in-line type pump, but the application of the invention to the distribution type pump is particularly advantageous in that only one electrically operative valve sufiice the purpose irrespective of the number of cylinders of the engine.
We claim: 1. A fuel feed control device for internal combustion engines, comprising:
fuel supply source means for supplying predetermined pressure, fuel injection pump means for feeding the pressurized fuel to fuel injection valves mounted in the engine, and an electromagnetic valve secured to said fuel injection pump and having a valve member provided with a seating portion, a valve seat, a movable core and a coil, and said seating fuel at a to said coil, so that the quantity of fuel discharged from said fuel injection pump and the period of the discharge are regulated by controlling the timing and the length of time for conducting current to said coil of said electromagnetic valve.
Claims (1)
1. A fuel feed control device for internal combustion engines, comprising: fuel supply source means for supplying fuel at a predetermined pressure, fuel injection pump means for feeding the pressurized fuel to fuel injection valves mounted in the engine, and an electromagnetic valve secured to said fuel injection pump and having a valve member provided with a seating portion, a valve seat, a movable core and a coil, and said seating portion and said valve seat being engageable in seating relation with each other inside the pump chamber of said fuel injection pump, said valve member being moved to open and close said electromagnetic valve so as to admit and block passage of fuel in response to the movement of said movable core which is moved by electric signals applied to said coil, so that the quantity of fuel discharged from said fuel injection pump and the period of the discharge are regulated by controlling the timing and the length of time for conducting current to said coil of said electromagnetic valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2803170 | 1970-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3724436A true US3724436A (en) | 1973-04-03 |
Family
ID=12237358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00127203A Expired - Lifetime US3724436A (en) | 1970-04-02 | 1971-03-23 | Fuel feed control device for internal combustion engines |
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| Country | Link |
|---|---|
| US (1) | US3724436A (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3841286A (en) * | 1971-08-04 | 1974-10-15 | Bosch Gmbh Robert | Engine runaway preventing safety means associated with a distributor-type fuel injection pump |
| US3859972A (en) * | 1973-06-28 | 1975-01-14 | Bendix Corp | Fuel injection system for an internal combustion engine |
| US3880131A (en) * | 1973-06-28 | 1975-04-29 | Bendix Corp | Fuel injection system for an internal combustion engine |
| US3896779A (en) * | 1972-03-30 | 1975-07-29 | Nippon Denso Co | Fuel injection pump for an internal combustion engine |
| US4036193A (en) * | 1971-07-30 | 1977-07-19 | Diesel Kiki Kabushiki Kaisha | Electronically controlled fuel injection pump |
| US4112901A (en) * | 1977-04-01 | 1978-09-12 | Autotronic Controls, Corp. | Fuel system with metering pump for internal combustion engines |
| US4170976A (en) * | 1977-03-29 | 1979-10-16 | Robert Bosch Gmbh | Control device for diesel-injection internal combustion engines |
| US4241714A (en) * | 1979-06-25 | 1980-12-30 | General Motors Corporation | Solenoid valve controlled fuel injection pump |
| EP0044743A1 (en) * | 1980-07-23 | 1982-01-27 | Ermino Tessari | A Diesel/gas engine conversion means |
| EP0055116A2 (en) * | 1980-12-22 | 1982-06-30 | Ford Motor Company Limited | Fuel injection pump |
| US4378775A (en) * | 1980-07-01 | 1983-04-05 | Robert Bosch Gmbh | Method and apparatus for fuel injection in internal combustion engines in particular diesel engines |
| US4385614A (en) * | 1979-04-06 | 1983-05-31 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| US4406267A (en) * | 1981-09-02 | 1983-09-27 | Ford Motor Company | Electromagnetically controlled fuel injection pump spill port valve assembly |
| US4411240A (en) * | 1982-05-05 | 1983-10-25 | Kravetz John J | Method and apparatus for the prevention of low temperature diesel engine failure |
| DE3335016A1 (en) * | 1982-09-30 | 1984-04-05 | Cummins Engine Co., Inc., 47201 Columbus, Ind. | ELECTRONICALLY CONTROLLED FUEL PUMP |
| US4475513A (en) * | 1981-10-15 | 1984-10-09 | Robert Bosch Gmbh | Fuel metering device for fuel injection pumps |
| US4491111A (en) * | 1981-11-07 | 1985-01-01 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
| US4535742A (en) * | 1983-05-19 | 1985-08-20 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| US4566417A (en) * | 1983-04-18 | 1986-01-28 | Nippondenso Co., Ltd. | Fuel injection control apparatus for diesel engines |
| US4586480A (en) * | 1983-11-26 | 1986-05-06 | Diesel Kiki Co., Ltd. | Electronically controlled distributor type fuel injection pump |
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| US2077259A (en) * | 1931-05-22 | 1937-04-13 | Joseph Schidlovsky | Fuel injecting device for internal combustion engines |
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| US3568646A (en) * | 1968-04-08 | 1971-03-09 | Teldix Gmbh | Fuel injection apparatus for internal combustion engines |
| US3575145A (en) * | 1967-11-10 | 1971-04-20 | Sulzer Ag | Method and apparatus for injecting fuel into the cylinders of a multicylinder piston-type internal combustion engine |
| US3587535A (en) * | 1968-12-06 | 1971-06-28 | Ambac Ind | Timing signal generator |
| US3592177A (en) * | 1968-10-04 | 1971-07-13 | Teldix Gmbh | Fuel-injection apparatus for internal-combustion engines |
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|---|---|---|---|---|
| US1664610A (en) * | 1925-01-08 | 1928-04-03 | Louis O French | Fuel-feeding system |
| US2077259A (en) * | 1931-05-22 | 1937-04-13 | Joseph Schidlovsky | Fuel injecting device for internal combustion engines |
| US2598528A (en) * | 1948-12-20 | 1952-05-27 | Louis O French | Fuel injection apparatus |
| US2863437A (en) * | 1956-01-31 | 1958-12-09 | Bessiere Pierre Etienne | Fuel injection devices for multicylinder engines |
| US2935061A (en) * | 1956-12-19 | 1960-05-03 | Bosch Gmbh Robert | Adjustable injection pump |
| US3058455A (en) * | 1960-02-24 | 1962-10-16 | Bosch Gmbh Robert | Injection pump |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036193A (en) * | 1971-07-30 | 1977-07-19 | Diesel Kiki Kabushiki Kaisha | Electronically controlled fuel injection pump |
| US3841286A (en) * | 1971-08-04 | 1974-10-15 | Bosch Gmbh Robert | Engine runaway preventing safety means associated with a distributor-type fuel injection pump |
| US3896779A (en) * | 1972-03-30 | 1975-07-29 | Nippon Denso Co | Fuel injection pump for an internal combustion engine |
| US3859972A (en) * | 1973-06-28 | 1975-01-14 | Bendix Corp | Fuel injection system for an internal combustion engine |
| US3880131A (en) * | 1973-06-28 | 1975-04-29 | Bendix Corp | Fuel injection system for an internal combustion engine |
| US4170976A (en) * | 1977-03-29 | 1979-10-16 | Robert Bosch Gmbh | Control device for diesel-injection internal combustion engines |
| US4112901A (en) * | 1977-04-01 | 1978-09-12 | Autotronic Controls, Corp. | Fuel system with metering pump for internal combustion engines |
| US4385614A (en) * | 1979-04-06 | 1983-05-31 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| US4241714A (en) * | 1979-06-25 | 1980-12-30 | General Motors Corporation | Solenoid valve controlled fuel injection pump |
| DE3022340A1 (en) * | 1979-06-25 | 1981-01-29 | Gen Motors Corp | FUEL INJECTION PUMP |
| US4378775A (en) * | 1980-07-01 | 1983-04-05 | Robert Bosch Gmbh | Method and apparatus for fuel injection in internal combustion engines in particular diesel engines |
| EP0044743A1 (en) * | 1980-07-23 | 1982-01-27 | Ermino Tessari | A Diesel/gas engine conversion means |
| EP0055116A2 (en) * | 1980-12-22 | 1982-06-30 | Ford Motor Company Limited | Fuel injection pump |
| EP0055116A3 (en) * | 1980-12-22 | 1983-09-21 | Ford Motor Company Limited | Fuel injection pump |
| US4406267A (en) * | 1981-09-02 | 1983-09-27 | Ford Motor Company | Electromagnetically controlled fuel injection pump spill port valve assembly |
| US4475513A (en) * | 1981-10-15 | 1984-10-09 | Robert Bosch Gmbh | Fuel metering device for fuel injection pumps |
| US4491111A (en) * | 1981-11-07 | 1985-01-01 | Robert Bosch Gmbh | Fuel injection apparatus for internal combustion engines |
| EP0078983B1 (en) * | 1981-11-07 | 1985-05-29 | Robert Bosch Gmbh | Fuel injection apparatus for internal-combustion engines |
| US4411240A (en) * | 1982-05-05 | 1983-10-25 | Kravetz John J | Method and apparatus for the prevention of low temperature diesel engine failure |
| DE3335016A1 (en) * | 1982-09-30 | 1984-04-05 | Cummins Engine Co., Inc., 47201 Columbus, Ind. | ELECTRONICALLY CONTROLLED FUEL PUMP |
| US4566417A (en) * | 1983-04-18 | 1986-01-28 | Nippondenso Co., Ltd. | Fuel injection control apparatus for diesel engines |
| US4535742A (en) * | 1983-05-19 | 1985-08-20 | Robert Bosch Gmbh | Fuel injection pump for internal combustion engines |
| US4586480A (en) * | 1983-11-26 | 1986-05-06 | Diesel Kiki Co., Ltd. | Electronically controlled distributor type fuel injection pump |
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