DE2506078A1 - Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals - Google Patents

Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals

Info

Publication number
DE2506078A1
DE2506078A1 DE19752506078 DE2506078A DE2506078A1 DE 2506078 A1 DE2506078 A1 DE 2506078A1 DE 19752506078 DE19752506078 DE 19752506078 DE 2506078 A DE2506078 A DE 2506078A DE 2506078 A1 DE2506078 A1 DE 2506078A1
Authority
DE
Germany
Prior art keywords
diodes
voltage
signals
fuel injection
series
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.)
Withdrawn
Application number
DE19752506078
Other languages
German (de)
Inventor
Juergen Voelckers
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE19752506078 priority Critical patent/DE2506078A1/en
Priority to US05/627,290 priority patent/US4051818A/en
Priority to JP50137862A priority patent/JPS5174117A/en
Publication of DE2506078A1 publication Critical patent/DE2506078A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D31/00Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001Electric control of rotation speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/02Circuit arrangements for generating control signals
    • F02D41/18Circuit arrangements for generating control signals by measuring intake air flow
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/46Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The circuit is provided with a smoothing system with low pass characteristics containing a resistance capacity combination to eliminate unwanted alternating voltage and the system is as in 455482. It is improved by the provision of two diodes (3, 4) which are connected in series, with the alternator amplifier (5) outputs connected between them. An additional diode (11) is connected parallel to the resistance (1) in the opposite direction to the first two diodes and it has a higher threshold value than the remaining diodes and is reversed in polarity. The amplifier (5) contains two capacitors (8, 9) and a series of resistors. There is one transistor (6) which is connected to the diodes via the capacitor (9). The base of the transistor is connected to the first capacitor (8) and the emitter is connected to a resistor.

Description

Anordnung zur Gewinnung von Signalen für das Steuergerät einer elektroni schen Kraftstoffeinspritzung (Zusatz zu Patent ... (Anm. P 24 55 482.3)) Das Hauptpatent schütze eine Anordnung zur Gewinnung von dem Steuergerät einer elektronischen Kraftstoffeinspritzung einer Brennkraftmaschine zuzuführenden Signalen mittels einer Drehzahlmeßeinrichtung für die Maschinendrehzahl und einer Luftmeßeinrichtung für die der Maschine zugeführte Luftmenge oder den Saugrohrdruck, von denen zumindest einer der analoge Spannungssignale erzeugenden Meßeinrichtungen eine Glättungseinrichtung mit DieSpaßcharakter für das in ihr erzeugte Spannungssignal, enthaltend eine RC-Kombination sowie Dioden parallel zu einem im Längszweig liegenden Widerstand der RC-Kombination, nachgeschaltet ist, die in den analogen Spannungssignalen infolge bedienungsfremder Einflüsse etwa auftretende Wechselspannungsanteile dämpfend ausgelegt ist. Zweck dieser Anordnung ist die Verhinderung von Fahrzeuglängsschwingungen, die sich zumindest bei einzelnen, mit einer Kraftstoffeinspritzung ausgerüsteten Kraftfahrzeugen in bestimmten Betriebszuständen, beispielsweise Schiebebetrieb und Teillast, gezeigt haben. Arrangement for obtaining signals for the control unit of an electronic fuel injection (addendum to patent ... (note P 24 55 482.3)) The main patent protect an arrangement for obtaining electronic fuel injection from the control unit signals to be fed to an internal combustion engine by means of a speed measuring device for the machine speed and an air measuring device for the one supplied to the machine Air volume or intake manifold pressure, at least one of which is the analog voltage signals generating measuring devices a smoothing device with the fun character for the voltage signal generated in it, containing an RC combination and diodes parallel to a resistor in the series branch of the RC combination, connected downstream is that in the analog voltage signals as a result of non-operating influences, for example occurring AC voltage components is designed to be damping. Purpose of this arrangement is the prevention of longitudinal vehicle vibrations, which are at least at individual motor vehicles equipped with fuel injection in certain Operating states, such as overrun and partial load, have shown.

Während die im Hauptpatent beschriebenen Ausführungsbeispiele der dort geschützten Anordnung eine passive Glättungseinrichtung verwenden, ist die erfindungsgemäße Ausbildung der Anordnung nach dem Hauptpatent dadurch gekennzeichnet, daß mehrere Dioden in Reihe liegen und zwischen diesen der Ausgang eines Wechselspannungsverstärkers für die Wechseispannungsanteile angeschlossen ist.While the embodiments described in the main patent Use a passive smoothing device there protected arrangement is the inventive design of the arrangement according to the main patent characterized in that that several diodes are in series and between these the output of an AC voltage amplifier for the AC voltage components is connected.

Die Erfindung sieht also eine aktive Glättungseinrichtung mit einem Wechselspannungsverstärker vor, der parallel zumindest einer der in Reihe liegenden Dioden geschaltet ist; durch sprechende Abstimmung läßt sich erreichen, daß am Ausgang der Glättungseinrichtung eine über den höchsten Spitzen des Wechselspannungsanteils liegende geglättete Ausgangsspannung ansteht. Demgegenüber ist bei einer passiven Glättungseinrichtung die geglättete Ausgangsspannung stets niedriger als die höchsten Spitzen.The invention thus provides an active smoothing device with a AC voltage amplifier in front of the parallel at least one of the series Diodes is switched; by speaking voting it can be achieved that at the exit of the smoothing device one over the highest peaks of the alternating voltage component lying smoothed output voltage is present. In contrast, with a passive Smoothing device the smoothed output voltage always lower than the highest Sharpen.

Ein Ausführungsbeispiel der Erfindung wird anhand der figürlich dargestellten Schaltung erläutert. Dabei beschränkt sich die Darstellung auf den Aufbau der aktiven Glättungseinrichtung, da die Zusammenschaltung mit den übrigen Bestandteilen der Anordnung bereits im Hauptpatent wiedergegeben ist.An embodiment of the invention is shown figuratively with reference to the Circuit explained. The representation is limited to the structure of the active ones Smoothing device, there the interconnection with the other components the arrangement is already reproduced in the main patent.

Als wesentlichen Bestandteil enthält die Glättungseinrichtung das RC-Glied, bestehend aus dem Längswiderstand 1 und dem Querkondensator 2. Parallel zum Widerstand 1 liegt die Reihenschaltung aus in diesem Ausführungsbeispiel zwei Dioden 3 und 4, zwischen denen der Ausgang des allgemein mit 5 bezeichneten Wechselspannungsverstärkers angeschlossen ist. Dieser enthält als wesentlichen Bestandteil den Transistor 6, dem über den Vorwiderstand 7 und den Eingangskondensator 8 das zu glättende analoge Spannungssignal mit den Wechselspaunungsanteilen zugeführt wird. Das verstärkte Ausgangssignal wird über den Ausgangskondensator 9 abgenommen.The smoothing device contains the as an essential component RC element, consisting of the series resistor 1 and the cross capacitor 2. In parallel the series circuit of two in this exemplary embodiment is connected to resistor 1 Diodes 3 and 4, between which the output of the alternating voltage amplifier, generally designated 5 connected. This contains the transistor 6 as an essential component, the analog to be smoothed via the series resistor 7 and the input capacitor 8 Voltage signal is supplied with the alternating voltage components. That amplified The output signal is picked up via the output capacitor 9.

Die Abstimmung des Verstärkers 5 ist so getroffen, daß am Ausgang 10 der Glättungseinrichtung eine geglättete Ausgangsspannung liegt, die größer ist als die höchsten Spitzen der Wechselspannungsanteile. Eine zu starke Anhebung des Wechselspannungsanteils durch den Verstärker 5 verhindert die weitere Diode 11, die parallel zu der Reihenschaltung der Dioden 3 und 4 und parallel zum Widerstand 1 liegt. Sie besitzt eine Schwellspannung, die höher ist als die Schwellspannung der Dioden 3 und 4, und ist gegensinnig zu diesen Dioden gepolt.The tuning of the amplifier 5 is made so that at the output 10 of the smoothing device has a smoothed output voltage which is greater as the highest peaks of the alternating voltage components. Raising the AC voltage component through the amplifier 5 prevents the further diode 11, those in parallel with the series connection of diodes 3 and 4 and in parallel with the resistor 1 lies. It has a threshold voltage that is higher than the threshold voltage of diodes 3 and 4, and is polarized in the opposite direction to these diodes.

Bei der Erfindung werden also die unerwünschten Wechselspannungsanteile selber dazu ausgenutzt, eine Erhöhung der Amplitude der dem Steuergerät zuzuführenden Gleichspannungssignale zu bewirken, wodurch eine den Yahrzeuglängsschwingungen entgegenwirkende Gemischanfettung erreicht wird.In the case of the invention, the undesired AC voltage components are therefore eliminated itself used to increase the amplitude of the to be fed to the control unit To bring about DC voltage signals, thereby counteracting the longitudinal vibrations of the vehicle Mixture enrichment is achieved.

Claims (2)

ANSPRÜCHE EXPECTATIONS y19 Anordnung zur Gewinnung von dem Steuergerät einer elektroschen Kraftstoffeinspritzung einer Brennkraftmaschine zuzuführenden Signalen mittels einer Drehzahlmeßeinrichtung für die Maschinendrehzahl und einer Luftmeßeinrichtung für die der Maschine zugeführte Luftmenge oder den Saugrohrdruck, von denen zumindest einer der analoge Spannungssignale erzeugenden Meßeinrichtungen eine Glättungseinrichtung mit 'Piefpaßcharakter für das in ihr erzeugte Spannungssignal, enthaltend eine RC-Kombination sowie Dioden parallel zu einem im Längs zweig liegenden Widerstand der RC-Sombination,nachgeschaltet ist, die in den analogen Spannungssignalen infolge bedienungsfremder Einflüsse etwa auftretende Wechselspannungsanteile dämpfend ausgelegt ist, nach Patent (Anm. P 24 5 482.3), dadurch gekennzeichnet, daß mehrere Dioden (7, 4) in Reihe liegen und zwischen diesen der Ausgang eines Wechselspannungsverstärkers (5) für die Wechselspannungsanteile angeschlossen ist.y19 arrangement for obtaining from the control unit an electric Fuel injection of an internal combustion engine to be fed signals by means of a Speed measuring device for the machine speed and an air measuring device for the amount of air supplied to the machine or the intake manifold pressure, of which at least one of the measuring devices generating analog voltage signals is a smoothing device with 'low pass character for the voltage signal generated in it, containing an RC combination and diodes connected in parallel to a resistor of the RC combination in the series branch is that in the analog voltage signals as a result of non-operating influences, for example occurring AC voltage components is designed to be damping, according to patent (note P 24 5 482.3), characterized in that several diodes (7, 4) are in series and between these the output of an AC voltage amplifier (5) for the AC voltage components connected. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß parallel zu dem Widerstand (1) zumindest eine weitere Diode (11) liegt, die eine höhere Schwellspannung als die Dioden (3, 4) besitzt und gegensinnig zu diesen gepolt ist. 2. Arrangement according to claim 1, characterized in that parallel at least one further diode (11) with a higher threshold voltage is connected to the resistor (1) than the diodes (3, 4) and is polarized in the opposite direction to these. L e e r s e i t eL e r s e i t e
DE19752506078 1974-11-23 1975-02-13 Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals Withdrawn DE2506078A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19752506078 DE2506078A1 (en) 1975-02-13 1975-02-13 Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals
US05/627,290 US4051818A (en) 1974-11-23 1975-10-30 Device for obtaining signals for the control unit of an electronic fuel injection system
JP50137862A JPS5174117A (en) 1974-11-23 1975-11-18 Denshishikinenryofunshasochi no seigyosochinitaisuru shingohatsuseisochi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752506078 DE2506078A1 (en) 1975-02-13 1975-02-13 Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals

Publications (1)

Publication Number Publication Date
DE2506078A1 true DE2506078A1 (en) 1976-08-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752506078 Withdrawn DE2506078A1 (en) 1974-11-23 1975-02-13 Electronic fuel injection system - uses unwanted alternating tension to increase regulator signals

Country Status (1)

Country Link
DE (1) DE2506078A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823848A1 (en) * 1977-05-31 1978-12-14 Nippon Denso Co Electronic fuel injection control for vehicle engine - incorporates computer to adjust mixture strength to avoid mechanical resonance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2823848A1 (en) * 1977-05-31 1978-12-14 Nippon Denso Co Electronic fuel injection control for vehicle engine - incorporates computer to adjust mixture strength to avoid mechanical resonance

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Legal Events

Date Code Title Description
8141 Disposal/no request for examination