DE2009280A1 - Fuel injector - Google Patents
Fuel injectorInfo
- Publication number
- DE2009280A1 DE2009280A1 DE19702009280 DE2009280A DE2009280A1 DE 2009280 A1 DE2009280 A1 DE 2009280A1 DE 19702009280 DE19702009280 DE 19702009280 DE 2009280 A DE2009280 A DE 2009280A DE 2009280 A1 DE2009280 A1 DE 2009280A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- fuel injection
- nozzle
- capacitor
- engine
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims description 26
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/041—Injectors peculiar thereto having vibrating means for atomizing the fuel, e.g. with sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/32—Controlling fuel injection of the low pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
-
- 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
- F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
- F02M27/08—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by sonic or ultrasonic waves
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection
-
- 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
- F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
- F02D2700/0261—Control of the fuel supply
- F02D2700/0266—Control of the fuel supply for engines with fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
Description
Unser Zeichen: P 2060Our reference: P 2060
THEPLSSSBYCOI-IPAHYLIMITEd ' . ■THEPLSSSBYCOI-IPAHYLIMITEd '. ■
2/60 Yicarage Lane, Ilford, Essex, Grossbritannien2/60 Yicarage Lane, Ilford, Essex, UK
Brennstoffeinspritzvorrichtung ' ' Zusatz zun Patent ....(Patentanmeldung P 17 51 458.8)Fuel injector '' Addition to patent .... (patent application P 17 51 458.8)
Gegenstand;des Hauptpatents .... (Patentanmeldung P 17 51 458.8 /15)ist eine Brennstoffeinspritzvorrichtung für einen Ver- ■ brennungsmotor mit Gemischansaugung mit einer in der .Luftansaugleitung angeordneten Düse, einer Brennstoffzuführeinrichtung, welche den Brennstoff in dieser'Düse'normalerweise urfer einem Druck hält, der selbst nicht ausreicht, um die erforderliche Brennstoffzuführung aus der Düse in die Luftströmung in dieser Leitung zu gewährleisten, einer Einrichtung mit einem Ultrs>e(challwandler zur Erzeugung von Ultraschallschwingungen der Düse in deren „Längsrichtung zur-Unterstützung der Einspritzung von Brennstoff in die Luftströmung und mit einer Einstelleinrichtung zur periodischen Erregung des Wandlers über Seiträume von einstellbarer Länge während des Durchgangs von Luft durch die Leitung,; um das Verhältnis der Brennstoffeinspritzung in die Luftströmung zu verändern. Gemäss einer bevorzugten Aus führ ung's form wird durch die Einstelleiirichtung während jedes Ansaughubs jedes Zylinders die Zeitperiode variabel festgelegt, während der ein elektrischer Strom mit geeigneter Frequenz an den Wandler zur Erzeugung von Ultraschallschwingungen angelegt wird. Geraäss einer Weiterbildung der Erfindung nach dem ;Hauptpatent kann, die Änderung der,Einspritzzeitdauer mit Hilfe eines Schalters bewirkt werden, in welchem einSubject of the main patent .... (patent application P 17 51 458.8 / 15) is a fuel injection device for an internal combustion engine with mixture intake with a nozzle arranged in the air intake line, a fuel supply device which normally urfer the fuel in this 'nozzle' a pressure which itself is not sufficient to ensure the necessary fuel supply from the nozzle into the air flow in this line, a device with an Ultrs> e ( sound transducer for generating ultrasonic vibrations of the nozzle in its "longitudinal direction to support the injection of Fuel in the air flow and with an adjusting device for periodic excitation of the converter over side spaces of adjustable length during the passage of air through the line; to change the ratio of fuel injection into the air flow. According to a preferred embodiment, the adjusting device during each Ans aughubs of each cylinder set the time period during which an electric current with a suitable frequency is applied to the transducer to generate ultrasonic vibrations. According to a further development of the invention according to the main patent, the change in the injection duration can be effected with the aid of a switch in which a
Schw/BaSchw / Ba
109837/0859109837/0859
örehbarer Schleifkontakt mit einem Steuerglied zusammenwirkt, dessen Winkeleinstellung sich als Punktion der Motordrehzahl und anderer Motordaten verändern kann.rotatable sliding contact interacts with a control element, whose angle setting can change as a puncture of the engine speed and other engine data.
Der Erfindung liegt die Aufgabe zugrunde, eine Brennstoffeinspritzvorrichtung zu schaffen, mit der sich eine Änderung der Länge der Einspritzdauer ohne Verwendung einer mechanisch betätigten Kontakteinrichtung erzielen lässt.The invention is based on the object of a fuel injection device to create with which a change in the length of the injection period without using a mechanical can achieve actuated contact device.
Gemäss der Erfindung wird die länge der Zeitdauer, während der ein Betätigungsstrom mit Ultraschallfrequenz an einen Wandler'angelegt wird, der in der Düse jedesmal dann Ultraschallschwingungen hervorruft, wenn die Anlegung des Stroms durch eine von der Hubstellung des Motors gesteuerte Einrichtung ausgelöst wird, von einer elektrischen Zeitschaltung gesteuert, die vorzugsweise entsprechend einschlägigen Motordaten veränderliche Schaltungselemente enthält.Die Zeitschaltung kann zweckmässigerweise einen Kondensator enthalten, der durch eine kurzzeitige Anlegung einer Ladespannung jedesmal dann geladen werden kann, wenn die Brennstoffeinspritzung beginnen soll. Die am Kondensator liegende Spannung wird dabei zum Schliessen eines elektronischen Schalters, in typischer Weise eines Transistors, in einer Schaltung verwendet, die einen Strom mit Ultraschallfrequenz von einem Oszillator oder einer anderen' Quelle an den Wandler anlegt, wonach die ladung am Kondensator über einen Widerstand abgeleitet wird, dessen Widerstandswert variabel ist, damit die jedem Zylinder bei jedem Ansaugtakt des Motors zugeführte Brennstoffmenge verändert werden kann. Vorzugsweise enthält die Vorrichtung auf Wunsch zusätzlich zu einer Einrichtung zur Veränderung des Widerstandswerts von Hand eine Einrichtung, die den wirksamen Widerstandswert des Widerstandes in der Entladeschaltung des Kondensators entsprechend einschlägiger Motordaten, wie dem Irufteinlassdruck, der Motortemperatur , usw. automatisch verändert.According to the invention, the length of time during which an actuating current at an ultrasonic frequency is applied to a Wandler 'is applied, which then each time ultrasonic vibrations in the nozzle caused when the application of the current by a device controlled by the stroke position of the motor is triggered, controlled by an electrical timing circuit, preferably according to the relevant Motor data contains variable circuit elements. The timing circuit can conveniently use a capacitor included, which can be charged by briefly applying a charging voltage each time the fuel injection should begin. The voltage on the capacitor is used to close an electronic switch, Typically a transistor, used in a circuit that supplies a current at an ultrasonic frequency from an oscillator or some other 'source is applied to the converter, after which the charge on the capacitor via a resistor is derived, the resistance value of which is variable, so that the each cylinder on each intake stroke of the engine the amount of fuel supplied can be changed. Preferably, the device includes, in addition to, if so desired a device for changing the resistance value by hand means which the effective resistance value the resistance in the discharge circuit of the capacitor according to relevant engine data, such as the air inlet pressure, the engine temperature, etc. changed automatically.
109837/0859109837/0859
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt:, deren einzige Figur/ein Blockschaltbild einer Zeitschaltung zeigt.An embodiment of the invention is shown in the drawing shown: whose only figure / block diagram is a Timing shows.
Ein Wandler 1, der derart an eine Einspritzdüse angeschlossen ist, dass er diese in Ultrascha11schwingungen versetzt, -wird von einem Ultraschalloszillator 2 erregt. Der Ultraschall-oszillator wird seinerseits von einer Gleichspannungsquelle PU über einen spannungsabhängigen Schalter 3 gespeist, der ein Wandler· oder eine andere" elektronische Schaltvorrichtung sein kann. Der Schalter 3 ist dabei so angeordnet, dass er nur dann leitet, wenn.die Spannung zwischen zwei Steueranschlüssen 4 und 5 einen vorbestimmten Wert überschreitet. Zwischen die zwei Steuerleiter 4 und 5 sind ein Kondensator 6 und ein dazu paralleler veränderlicher Ableitungswiderstand 7 eingeschaltet. Man kann leicht erkennen, dass die Spannung zwischen den Steueranschlüssen 4 und 5 infolge des durch den Ableitungswiderstand 7 fliessenden Leckstroms normalerweise unter dem.vorbestimmten Wert liegt, so dass der Schalter 3 normalerweise nicht leitet. Es ist eine Ladeschaltung für den Kondensator vorgesehen, die den leitenden Zustand des. Schalters 3 zu einem Zeitpunkt auslöst, der entsprechend der Stellung des oder der , Kolben eines mit Brennstoff zu speisenden Motors bestimmt wird. '.. . ,A converter 1, which is connected to an injection nozzle in such a way that it causes it to vibrate ultrasonically excited by an ultrasonic oscillator 2. The ultrasonic oscillator is in turn powered by a DC voltage source PU fed via a voltage-dependent switch 3, the a converter · or some other "electronic switching device can be. The switch 3 is arranged so that it only conducts when the voltage between two control terminals 4 and 5 have a predetermined value exceeds. Between the two control conductors 4 and 5 are a capacitor 6 and a variable parallel thereto Leakage resistor 7 switched on. One can easily recognize that the voltage between the control connections 4 and 5 as a result of the flowing through the discharge resistor 7 Leakage current is normally below the predetermined value, so that switch 3 does not normally conduct. A charging circuit for the capacitor is provided which triggers the conductive state of the switch 3 at a point in time that corresponds to the position of the, Piston of an engine to be fed with fuel is determined will. '... ,
Im dargestellten Ausführungsbeispiel besitzt diese ladeschaltung zwei Leiter 8 und 9, die an eine Gleichstromquelle angeschlossen sind. Es kann angenommen werden, dass diese Gleichstromquelle zweckmässigerwelse die oben erwähnte Gleichstromquelle PlT ist. In einem der Leiter Q, 9 ist ein zweckmässigerweise ebenfalls aus einem elektronischen Schalter bestehender, normalerweise offener Ladeschalter 10 eingeschaltet, an dem zu einem geeigneten Zeitpunkt ein Zündsignal, beispielsweise ein von der Zündeinrichtung des Motors erzeugtes Signal über einen Steuereingang 11 angelegt wird. Man kann leicht erkennen, dass der 109837/0859In the illustrated embodiment, this charging circuit has two conductors 8 and 9 which are connected to a direct current source are connected. It can be assumed that this direct current source would be more convenient than the one above mentioned direct current source is PlT. In one of the ladder Q, 9 is a normally open charging switch which also expediently consists of an electronic switch 10 switched on, at which an ignition signal, for example one from the ignition device, at a suitable point in time The signal generated by the motor is applied via a control input 11. One can easily see that the 109837/0859
«ι«Ι
Kondensator β dann, wenn der ladeschalter durch das am Steuereingang 11 angelegte Zündsignal während einer kurzen Periode geschlossen wird, über die Leiter 8 und 9 aufgeladen wird, wodurch seine I-sdespannung schnell über den Leitungspunkt des epannungsabhängigen Schalters 3 ansteigt, damit der Betrieb des Wandlers 1 und auf diese Weise das Einspritzen von Brennstoff in den Motor ausgelöst wird. Sobald sich der Ladeschalter 10 wieder öffnet, beginnt die Spannung am Kondensator 6 in einem vom Wert des veränderlichen Ableitungswiderstandes 7 bestimmten Mass abzufallen, so dass die Brennstoffeinspritzung nach einer Zeitperiode aufhört,-deren Länge vom momentanen Wert dieses Widerstandes festgelegt ist.Capacitor β, when the charging switch is closed for a short period by the ignition signal applied to the control input 11, is charged via the conductors 8 and 9, whereby its I-sdesvoltage rises rapidly above the conduction point of the voltage-dependent switch 3, thus enabling the converter to operate 1 and in this way the injection of fuel into the engine is initiated. As soon as the charging switch 10 opens again, the voltage on the capacitor 6 begins to drop by a certain amount determined by the value of the variable leakage resistance 7, so that the fuel injection stops after a period of time, the length of which is determined by the current value of this resistance.
Nach der Darstellung ist der veränderliche Ableitungswiderstand von vier verschiedenen Eingangssignalen abhängig, die ihm über die Eingangsleiter 12, 13, 14 und 15 zugeführt werden. Die Signale sollen dabei vom Ansaugunterdruclc, der Motortemperatur, der Lufttemperatur und der barometrischen Höhe (oder dem TTTngebungsluftdruck) abhängen.According to the illustration, the variable leakage resistance is dependent on four different input signals which are fed to it via the input conductors 12, 13, 14 and 15. The signals are thereby from Ansaugunterdruclc, engine temperature, air temperature and the barometric height (or the TT Tngebungsluftdruck) depend.
In dieser Ausführungsform ist kein von Hand veränderlicher Eingang vorgesehen worden, da angenommen worden ist, dass eine Handsteuerung zur Beeinflussung einer Drosselklappe angebracht ist, wobei die· automatische Einstellung der Brennstoffeinspritzperiode so ausgeführt ist, dass unabhängig von der Drosselklappenstellung optimale Yarbrennungsbedinggungen sichergestellt werden.In this embodiment none is manually changeable Input has been provided because it has been assumed that a manual control for influencing a throttle valve is attached, wherein the · automatic setting of the fuel injection period is carried out so that independent optimum combustion conditions are ensured by the throttle valve position.
109837/0859109837/0859
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB61191/68A GB1294094A (en) | 1965-05-12 | 1968-12-23 | Improvements in or relating to fuel-injection systems for mixture-aspiring internal-combustion emgines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2009280A1 true DE2009280A1 (en) | 1971-09-09 |
Family
ID=10486714
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681751458 Pending DE1751458A1 (en) | 1968-12-23 | 1968-05-31 | Fuel injector |
| DE19702009280 Pending DE2009280A1 (en) | 1968-12-23 | 1970-02-27 | Fuel injector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681751458 Pending DE1751458A1 (en) | 1968-12-23 | 1968-05-31 | Fuel injector |
Country Status (3)
| Country | Link |
|---|---|
| DE (2) | DE1751458A1 (en) |
| FR (1) | FR2037360A5 (en) |
| GB (1) | GB1138536A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10000885A1 (en) * | 2000-01-12 | 2001-07-19 | Henricus Geradus Corneli Moers | Method for supplying a fuel-air mixture to an internal combustion engine and device for carrying out the method |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1311879A (en) * | 1969-06-25 | 1973-03-28 | Plessey Co Ltd | Fuel-injection systems for internal-combustion engines fed with a fuel-and-air mixture |
| GB1471916A (en) * | 1974-03-14 | 1977-04-27 | Plessey Co Ltd | Fuel injection arrangements having vibrating fuel injection nozzles |
| US3893434A (en) * | 1972-09-29 | 1975-07-08 | Arthur K Thatcher | Computer controlled sonic fuel system |
| IT1125721B (en) * | 1976-01-14 | 1986-05-14 | Plessey Handel Investment Ag | APPARATUS FOR DOSING A FUEL AND AIR IN AN ENGINE |
| US4029064A (en) * | 1976-03-18 | 1977-06-14 | Irving J. Grace | Carburetion system for internal combustion engines |
| DE3008618A1 (en) * | 1980-03-06 | 1981-09-10 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL SUPPLY SYSTEM |
| US6732720B2 (en) | 2002-05-30 | 2004-05-11 | Monroe R. Kelemencky | Ultrasonic liquid fuel introduction system |
| US7458364B2 (en) | 2005-08-05 | 2008-12-02 | Scion-Sprays Limited | Internal combustion engine having a fuel injection system |
| CN101956621B (en) | 2005-08-05 | 2013-12-25 | 罗伯特.博世有限公司 | Fuel injection system for internal combustion engine |
| GB2421543B (en) * | 2005-08-05 | 2006-11-29 | Scion Sprays Ltd | A fuel injection system for an internal combustion engine |
| US8116962B2 (en) | 2007-02-28 | 2012-02-14 | Scion-Sprays Limited | Method of fuel injection |
| GB2452766B (en) | 2007-09-14 | 2010-01-06 | Scion Sprays Ltd | Internal combustion engine with a fuel injection system |
-
1965
- 1965-05-12 GB GB20062/65A patent/GB1138536A/en not_active Expired
-
1968
- 1968-05-31 DE DE19681751458 patent/DE1751458A1/en active Pending
-
1970
- 1970-02-09 FR FR7004416A patent/FR2037360A5/fr not_active Expired
- 1970-02-27 DE DE19702009280 patent/DE2009280A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10000885A1 (en) * | 2000-01-12 | 2001-07-19 | Henricus Geradus Corneli Moers | Method for supplying a fuel-air mixture to an internal combustion engine and device for carrying out the method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2037360A5 (en) | 1970-12-31 |
| DE1751458A1 (en) | 1971-07-01 |
| GB1138536A (en) | 1969-01-01 |
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