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DE2526551A1 - Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached - Google Patents

Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached

Info

Publication number
DE2526551A1
DE2526551A1 DE19752526551 DE2526551A DE2526551A1 DE 2526551 A1 DE2526551 A1 DE 2526551A1 DE 19752526551 DE19752526551 DE 19752526551 DE 2526551 A DE2526551 A DE 2526551A DE 2526551 A1 DE2526551 A1 DE 2526551A1
Authority
DE
Germany
Prior art keywords
internal combustion
fuel supply
combustion engine
reached
engines
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Withdrawn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
DE19752526551
Other languages
German (de)
Inventor
Karlheinz Dipl Ing Dr Lange
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE19752526551 priority Critical patent/DE2526551A1/en
Publication of DE2526551A1 publication Critical patent/DE2526551A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00Starting aids for combustion engines, not otherwise provided for
    • F02N19/001Arrangements thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors

Landscapes

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

Abstract

The starting control unit is for internal combustion engines esp. in vehicles and is actuated by moving the accelerator pedal or depressing the clutch pedal. The control unit (7-9) frees the fuel supply to the engine (2) when a predetermined RPM has been reached. The unit consists of an RPM transmitter (7), located pref. on the crank shaft (1) of the engine. The transmitter has a logic element (8). After the pre-determined RPM has been reached, the element actuates a blocking element (9) in the fuel supply conduit (10) of the engine, to free the fuel supply.

Description

Anlaßsteuervorrichtung für Brennkraftmaschinen Die Erfindung betrifft eine Anlaßsteuervorrichtung für Brennkraftmaschinen, insbesondere von Fahrzeugen, wobei die Anlaßsteuervorrichtung zum Anlassen der Brennkraftmaschine durch das Berühren des Gaspedals oder durch das Niedertreten des Kupplungspedals betätigt wird. Startup Control Apparatus for Internal Combustion Engines The invention relates to a start-up control device for internal combustion engines, in particular for vehicles, wherein the starting control device for starting the internal combustion engine by the touch the accelerator pedal or by depressing the clutch pedal.

Die Erfindung befasst sich mit dem Problem, eine Einrichtung zu schaffen, mit der es möglich ist, die Luftverunreinigung, die sich ergibt, wenn ein Fahrzeug z.B. vor einer Signal leuchte halten muß, zu vermeiden. Zur Lösung dieses Problems ist es bekannt (DT-OS 2 251 837), die Brennkraftmaschine mittels einer Einrichtung in Abhängigkeit des Bewegungszustandes des Kraftfahrzeuges auszuschalten und durch Berühren des Gaspedals (DT-PS 2 158 095) oder durch das Niedertreten des Kupplungspedals (DT-OS 2 424 773) die Brennkraftmaschine wieder anzulassen. Hierbei hat sich jedoch als besonders nachteilig erwiesen, daß während des Anlaßvorganges durch das Durchströmen von unverbranntem Luft-Kraftstoff-Gemisch aufgrund der extrem niedrigen Anfangsdrehzahlen nicht möglichen Zündung unerwünscht hohe Abgas-Emissions-Spitzen auftreten. The invention is concerned with the problem of creating a device with which it is possible to reduce the air pollution that arises when a vehicle e.g. stop in front of a signal light. To solve this problem it is known (DT-OS 2 251 837), the internal combustion engine by means of a device off depending on the state of motion of the motor vehicle and through Touching the accelerator pedal (DT-PS 2 158 095) or by depressing the clutch pedal (DT-OS 2 424 773) to start the engine again. This has however proved to be particularly disadvantageous that during the starting process by the flow of unburned air-fuel mixture due to the extremely low initial speeds ignition that is not possible undesirably high exhaust gas emission peaks occur.

Aufgabe der Erfindung ist es, eine Anlaßsteuervorrichtung für Brennkraftmaschinen, insbesondere von Fahrzeugen, zu schaffen, durch die unerwünscht hohe Abgas-Emissions-Spitzen während des Anlaßvorganges der Brennkraftmaschine sicher vermieden werden. The object of the invention is to provide a starter control device for internal combustion engines, especially of vehicles, to create, due to the undesirably high exhaust emission peaks can be safely avoided during the starting process of the internal combustion engine.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Steuervorrichtung zum Anlassen der Brennkraftmaschine eine Einrichtung umfasst, durch die die Kraftstoffzufuhr der Brennkraftmaschine erst nach dem Erreichen einer vorbestimmten Drehzahl der BrennkraftmaSchine freigegeben wird. Dadurch wird vermieden, daß in der Anfangsphase des Anlaßvorganges der Brennkraftmaschine, in der aufgrund der niedrigen Drehzahl noch keine gesicherte Zündung möglich ist, dieser kein Kraftstoff zugeführt wird, sondern die Kraftstoffzufuhr erst erfolgt, wenn aufgrund einer höheren Drehzahl eine Zündung der Brennkraftmaschine sichergestellt ist. Hierdurch wird kein oder nur wenig unverbranntes Luft-Kraftstoff-Gemisch aus der Brennkraftmaschine ausgestoßen und somit die Abgas-Emission gegenüber den bekannten Einrichtungen erheblich verbessert. According to the invention this object is achieved in that the control device for starting the internal combustion engine comprises a device through which the fuel supply the internal combustion engine only after reaching a predetermined speed of the Internal combustion engine is released. This avoids that in the initial phase the starting process of the internal combustion engine, due to the low speed a secure ignition is not yet possible, no fuel is being supplied to it, but the fuel is only supplied when due to a higher speed ignition of the internal combustion engine is ensured. This results in no or only a small amount of unburned air-fuel mixture emitted from the internal combustion engine and thus the exhaust gas emissions are considerably improved compared to the known devices.

Als besonders kostengünstig und funktionssicher hat sich erwiesen, daß die Einrichtung durch einen vorzugsweise auf der Kurbelwelle der Brennkraftmaschine angeordneten Drehzahl geber gebildet wird, dem ein Logik-Element nachgeschaltet ist, das nach dem Erreichen der vorbestimmten Drehzahl eine Absperrvorrichtung in der Kraftstoff-Zufuhrleitung der Brennkraftmaschine betätigt, die dann die Kraftstoffzufuhr freigibt. It has proven to be particularly cost-effective and functionally reliable that the device by a preferably on the crankshaft of the internal combustion engine arranged speed encoder is formed, which is followed by a logic element is that after reaching the predetermined speed a shut-off device in the fuel supply line of the internal combustion engine is actuated, which then controls the fuel supply releases.

In der Zeichnung ist die erfindungsgemäße Anlaßsteuervorrichtung für Brennkraftmaschinen in einer beispielsweisen Ausführungsform dargestellt. In the drawing is the starting control device according to the invention for internal combustion engines shown in an exemplary embodiment.

Auf der Kurbelwelle 1 einer mit 2 bezeichneten Brennkraftmaschine ist ein Schwungrad 3 angeordnet, das mit einem Anlasser 4 beliebiger Bauart zusammenwirkt. Der Anlasser 4 wird mittels eines Akkumulators 5 und eines Anlaßschalters 6 betätigt. On the crankshaft 1 of an internal combustion engine designated by 2 a flywheel 3 is arranged, which cooperates with a starter 4 of any type. The starter 4 is operated by means of an accumulator 5 and a starter switch 6.

Einem vorteilhafterweise ebenfalls auf der Kurbelwelle 1 angeordneten Drehzahlgeber 7 ist ein Logik-Element 8 nachgeschaltet, das eine Kraftstoff-Absperrvorrichtung 9 in der Kraftstoff-Zuführungsleitung 10 zur Brennkraftmaschine 2 bzw. deren Ansaugsystem steuert.One that is also advantageously arranged on the crankshaft 1 Tachometer 7 is followed by a logic element 8 which has a fuel shut-off device 9 in the fuel supply line 10 to the internal combustion engine 2 or its intake system controls.

Zur Inbetriebnahme der Brennkraftmaschine 2 wird der An1aßschalter 6 betätigt. Dieser Anlaßschalter 6 kann entweder in bekannter Weise durch das Berühren des Gaspedals oder beim Niedertreten des Kupplungspedals betätigt werden. Der Stromkreis zum Anlasser 4 ist geschlossen und dieser bewirkt ein Drehen des Schwungrades 3 und somit auch der Kurbelwelle 1. Die Umdrehungszahl wird von dem ebenfalls auf der Kurbelwelle 1 angeordneten Drehzahl geber 7 ermittelt und zum Logik-Element weitergeleitet. To start the internal combustion engine 2, the starter switch 6 actuated. This starter switch 6 can either be in a known manner by touching the accelerator pedal or when the clutch pedal is depressed. The circuit to the starter 4 is closed and this causes the flywheel 3 to turn and thus also of the crankshaft 1. The number of revolutions is also increased by the the crankshaft 1 arranged speed encoder 7 determined and the logic element forwarded.

Da bei den extrem niedrigen Drehzahlen der ersten Umdrehungen der Kurbelwelle in der Anfangsphase des Anlaßvorganges der Brennkraftmaschine noch keine gesicherte Zündung möglich ist, ist das Logik-Element so ausgeführt, daß dieses erst nachdem die Kurbelwelle 1 eine vorbestimmte Drehzahl erreicht hat, einen Steuerimpuls an die Kraftstoff-Absperrvorrichtung 9 weitergibt, und diese dann die Kraftstoffzufuhr zur Brennkraftmaschine 2 bzw. deren Ansaugsystem freigibt. Gleichzeitig wird der Stromkreis des Anlassers 4 in bekannter Weise wieder unterbrochen. Dadurch wird vermieden, daß in der Phase des Anlaßvorganges, in der aufgrund der geringen Drehzahl der Brennkraftmaschine eine Zündung nicht möglich ist, der Brennkraftmaschine Luft-Kraftstoff-Gemisch zugeführt wird, da dieses beim Anlaßvorgang hohe Abgas-Emissions-Spitzen bilden würde. Das automatische Abstellen der Brennkraftmaschine bei Stillstand des Fahrzeuges, z.B. vor einer Signal leuchte, erfolgt in bekannter Weise.Since at the extremely low speeds of the first revolutions of the Crankshaft in the initial phase of the starting process of the internal combustion engine not yet secured ignition is possible, the logic element is designed so that this only after the crankshaft 1 has reached a predetermined speed, a control pulse passes to the fuel shut-off device 9, and this then the fuel supply to the internal combustion engine 2 or its intake system releases. At the same time the Circuit of the starter 4 interrupted again in a known manner. This will avoided that in the phase of the starting process, in which due to the low speed ignition is not possible for the internal combustion engine, the internal combustion engine is an air-fuel mixture is supplied, since this form high exhaust gas emission peaks during the starting process would. The automatic shutdown of the internal combustion engine when the vehicle is at a standstill, e.g. in front of a signal lamp, is carried out in a known manner.

Claims (2)

PatentansprücheClaims 1.Anlaßsteuervorrichtung für Brennkraftmaschinen, insbesoere von Fahrzeugen, wobei die Anlaßsteuervorrichtung zum Anlassen der Brennkraftmaschine durch das Berühren des gaspedals oder durch das Niedertreten des Kupplungspedals betätigt wird, dadurch gekennzeichnet, daß die Steuervorrichtung zum Anlassen der Brennkraftmaschine eine Einrichtung (7, 8, 9)umfasst, durch die die Kraftstoffzufuhr der Brennkraftmaschine (2) erst nach dem Erreichen einer vorbestimmten Drehzahl einer Brennkraftmaschine (2) freigegeben wird. 1.Start control device for internal combustion engines, in particular from Vehicles, wherein the starting control device for starting the internal combustion engine by touching the accelerator pedal or by depressing the clutch pedal is operated, characterized in that the control device for starting the Internal combustion engine comprises a device (7, 8, 9) through which the fuel supply of the internal combustion engine (2) only after reaching a predetermined speed an internal combustion engine (2) is released. 2.Anlaßsteuervorrichtung für Brennkraftmaschinen nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtung durch einen vorzugsweise auf der Kurbelwelle (1) der Brennkraftmaschine (2) angeordneten Drehzahl geber (7) gebildet wird, dem ein Logik-Element (8) nachgeschaltet ist, das nach dem Erreichen der vorbestimmten Drehzahl eine Absperrvorrichtung (9) in der Kraftstoffzuführungsleitung (10) der Brennkraftmaschine (2) betätigt, die dann die Kraftstoffzufuhr freigibt. 2.Start control device for internal combustion engines according to claim 1, characterized in that the device is preferably on the crankshaft (1) the internal combustion engine (2) arranged speed encoder (7) is formed, the a logic element (8) is connected downstream, which after reaching the predetermined Speed of a shut-off device (9) in the fuel supply line (10) of the Internal combustion engine (2) actuated, which then releases the fuel supply.
DE19752526551 1975-06-13 1975-06-13 Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached Withdrawn DE2526551A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752526551 DE2526551A1 (en) 1975-06-13 1975-06-13 Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752526551 DE2526551A1 (en) 1975-06-13 1975-06-13 Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached

Publications (1)

Publication Number Publication Date
DE2526551A1 true DE2526551A1 (en) 1976-12-30

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DE19752526551 Withdrawn DE2526551A1 (en) 1975-06-13 1975-06-13 Starting control for vehicle IC engines - blocks fuel supply until pre-determined rpm is reached

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514424A1 (en) * 1981-10-14 1983-04-15 Marchal Equip Auto MOTOR VEHICLE HAVING A STARTER LINKED TO THE ENGINE BY A FREE WHEEL
US6796293B2 (en) 2000-03-31 2004-09-28 Siemens Aktiengesellschaft Method for starting an internal combustion engine and starter device for an internal combustion engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514424A1 (en) * 1981-10-14 1983-04-15 Marchal Equip Auto MOTOR VEHICLE HAVING A STARTER LINKED TO THE ENGINE BY A FREE WHEEL
US6796293B2 (en) 2000-03-31 2004-09-28 Siemens Aktiengesellschaft Method for starting an internal combustion engine and starter device for an internal combustion engine

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