DE102012004790A1 - Starter for combustion engine of motor car, has control unit adapted to start only when battery is electrically connected with motor while another battery is switched-on with time delay and emits no power at start - Google Patents
Starter for combustion engine of motor car, has control unit adapted to start only when battery is electrically connected with motor while another battery is switched-on with time delay and emits no power at start Download PDFInfo
- Publication number
- DE102012004790A1 DE102012004790A1 DE201210004790 DE102012004790A DE102012004790A1 DE 102012004790 A1 DE102012004790 A1 DE 102012004790A1 DE 201210004790 DE201210004790 DE 201210004790 DE 102012004790 A DE102012004790 A DE 102012004790A DE 102012004790 A1 DE102012004790 A1 DE 102012004790A1
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- Germany
- Prior art keywords
- battery
- starting device
- time delay
- motor
- starter motor
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
- F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2250/00—Problems related to engine starting or engine's starting apparatus
- F02N2250/02—Battery voltage drop at start, e.g. drops causing ECU reset
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/20—Control related aspects of engine starting characterised by the control method
- F02N2300/2011—Control involving a delay; Control involving a waiting period before engine stop or engine start
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
Description
Die Erfindung betrifft eine Startvorrichtung für eine Brennkraftmaschine, umfassend eine als Startermotor ausgebildete elektrische Maschine, eine zwei Batterien aufweisende Batterieanordnung und ein mit dem Startermotor und der Batterieanordnung verbundenes Steuergerät.The invention relates to a starting device for an internal combustion engine, comprising an electric machine designed as a starter motor, a battery arrangement having two batteries and a control device connected to the starter motor and the battery arrangement.
Startvorrichtungen für Brennkraftmaschinen umfassen zumeist eine als Startermotor ausgebildete elektrische Maschine, die beim Start von einer Batterie gespeist wird, indem ein Steuergerät die Batterie beim Start elektrisch mit dem Startermotor verbindet. Die Startvorrichtung ist dabei so ausgelegt, dass der Startermotor auch bei einer festgelegten, sehr niedrigen Temperatur ein ausreichend großes Drehmoment auf die Kurbelwelle überträgt, so dass das höchste Schleppmoment bei der ersten Kompression der Brennkraftmaschine überwunden wird. Bei derartigen Startvorrichtungen kann es in der Startphase zu einem Spannungseinbruch kommen, so dass bestimmte Verbraucher nicht mehr funktionieren.Starting devices for internal combustion engines usually comprise a starter motor designed as an electric machine, which is powered by a battery at start by a controller connects the battery at startup electrically connected to the starter motor. The starting device is designed so that the starter motor transmits a sufficiently large torque to the crankshaft even at a fixed, very low temperature, so that the highest drag torque is overcome in the first compression of the internal combustion engine. In such starting devices, a voltage dip may occur in the starting phase, so that certain consumers no longer function.
Es sind auch Fahrzeugbordnetze mit zwei separaten Batterien bekannt. Im Fahrbetrieb sind beide Batterien miteinander verbunden, während des Starts werden die Batterien mittels eines elektrischen Schalters oder durch eine Q-Diode getrennt. Die zweite Batterie versorgt während des Starts das Bordnetz und verhindert damit einen Spannungseinbruch, der Start der Brennkraftmaschine erfolgt ausschließlich durch die erste Batterie. Als Startermotor werden meist Gleichstrommotoren verwendet, üblicherweise handelt es sich dabei um permanenterregte Gleichstrommotoren. Diese Motoren weisen jedoch den Nachteil auf, dass beim Einschalten ein sehr hoher Einschaltstrom fließt, da beim Start noch keine Gegen-EMK (elektromotorische Kraft) vorhanden ist, der Einschaltvorgang gleicht somit einem Kurzschluss. Der Kurzschlussstrom wird lediglich vom Innenwiderstand der Batterie, dem Leitungswiderstand und vom ohmschen Widerstand des Startermotors begrenzt.There are also vehicle electrical systems with two separate batteries known. When driving, both batteries are connected to each other, during the start the batteries are disconnected by means of an electric switch or a Q-diode. The second battery supplied during the start of the electrical system, thus preventing a voltage dip, the start of the engine is exclusively by the first battery. As a starter motor usually DC motors are used, these are usually permanent-magnet DC motors. However, these motors have the disadvantage that when switching a very high inrush current flows, since at start still no back EMF (electromotive force) is present, the turn-on is thus similar to a short circuit. The short-circuit current is only limited by the internal resistance of the battery, the line resistance and the ohmic resistance of the starter motor.
Aus der
Allerdings führt der hohe Einschaltstrom auch zu einigen Nachteilen. Die hohe Strombelastung der Schleifkohlen und des Starterrelais begrenzt die Lebensdauer dieser Bauteile. Die hohen fließenden Ströme begünstigen eine Entmagnetisierung der Magnete, zudem wird ein Spannungseinbruch im Bordnetz während des Starts vom Fahrer als unangenehm wahrgenommen.However, the high inrush current also leads to some disadvantages. The high current load of the carbon brushes and the starter relay limits the life of these components. The high-flowing currents promote demagnetization of the magnets, in addition, a voltage drop in the electrical system during the start is perceived by the driver as unpleasant.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Startvorrichtung anzugeben, bei der der Einschaltstrom verringert ist.The invention is therefore based on the object to provide a starting device in which the inrush current is reduced.
Zur Lösung dieser Aufgabe ist bei einer Startvorrichtung der eingangs genannten Art erfindungsgemäß vorgesehen, dass das Steuergerät so ausgebildet ist, dass es beim Start lediglich eine Batterie elektrisch mit dem Startermotor verbindet, während die andere Batterie beim Start keinen Strom abgibt und erst zeitverzögert zugeschaltet wird.To solve this problem is provided according to the invention in a starting device of the type mentioned that the control unit is designed so that it only electrically connects a battery with the starter motor at start, while the other battery at start does not give off electricity and is switched on only after a time delay.
Die Erfindung beruht auf der Kenntnis, dass der Einschaltstrom (Kurzschlussstrom) verringert werden kann, indem der für den Start benötigte Gesamtstrom auf zwei Ströme aufgeteilt wird, wobei zunächst lediglich eine Batterie Strom für den Startermotor zur Verfügung stellt, während die zweite Batterie noch ausgeschaltet ist und keine Energie liefert. Diese zweite Batterie wird nach dem Verstreichen eines festgelegten Zeitraums zugeschaltet. Die Summe der von den beiden Batterien gelieferten Ströme, der Gesamtstrom, ist geringer als der bei einer einzigen vorhandenen Batterie gelieferte Strom. Dadurch ergibt sich der Vorteil, dass ein Spannungseinbruch im Bordnetz vermieden wird, somit können elektrische Komponenten und Verbraucher auf eine geringere Spannungsspreizung ausgelegt werden. Für den Benutzer ergibt sich der Vorteil, dass er einen gegebenenfalls noch vorhandenen, jedoch geringeren Spannungseinbruch überhaupt nicht bemerkt.The invention is based on the knowledge that the inrush current (short-circuit current) can be reduced by dividing the total current required for starting into two currents, wherein initially only one battery provides power to the starter motor while the second battery is still off and no energy supplies. This second battery will be turned on after the lapse of a set period of time. The sum of the currents supplied by the two batteries, the total current, is less than that supplied by a single existing battery. This results in the advantage that a voltage dip in the electrical system is avoided, thus electrical components and consumers can be designed for a lower voltage spread. For the user, there is the advantage that he does not even notice an optionally existing, but lower voltage dip.
Bei der erfindungsgemäßen Startvorrichtung wird es bevorzugt, dass die Zeitverzögerung 20–100 ms, vorzugsweise 40–60 ms, weiter vorzugsweise näherungsweise 50 ms beträgt. Nach dem Ende der Zeitverzögerung wird die andere (zweite) Batterie zugeschaltet und liefert ebenfalls Strom an den Startermotor, so dass dieser ab diesem Zeitpunkt von beiden Batterien gespeist wird. Der von beiden Batterien insgesamt gelieferte Strom ist ausreichend, um die erste Kompression der Brennkraftmaschine zu überwinden, dennoch bleibt der Einschaltstrom niedrig, das heißt er ist wesentlich niedriger im Vergleich zu einem Einschaltstrom, der auftritt, wenn beide Batterien gleichzeitig eingeschaltet werden.In the starting device according to the invention, it is preferred that the time delay is 20-100 ms, preferably 40-60 ms, more preferably approximately 50 ms. After the end of the time delay, the other (second) battery is switched on and also supplies power to the starter motor, so that it is fed from this point on both batteries. The total amount of power supplied by both batteries is sufficient to overcome the first compression of the engine, yet the inrush current remains low, that is, significantly lower than an inrush current that occurs when both batteries are turned on simultaneously.
Bei der erfindungsgemäßen Startvorrichtung kann es vorgesehen sein, dass der Innenwiderstand der zuerst mit dem Startermotor verbundenen Batterie zur Verringerung des Einschaltstroms so gewählt ist, dass er größer als für den Kaltstart erforderlich ist. Der höhere Innenwiderstand bewirkt, dass der Einschaltstrom geringer wird, insbesondere durch diese Maßnahme verringert sich der beim Start fließende Strom.In the starting device according to the invention, it may be provided that the internal resistance of the first connected to the starter motor battery to reduce the inrush current is selected so that it is greater than required for the cold start. The higher internal resistance causes the Inrush current is lower, in particular by this measure, the current flowing at start decreases current.
In weiterer Ausgestaltung der Erfindung kann es vorgesehen sein, dass die Batterieanordnung eine Bleibatterie und eine Lithiumbatterie umfasst. Die Bleibatterie kann dabei zuerst elektrisch mit dem Startermotor verbunden werden, während die Lithiumbatterie das Bordnetz speist, anschließend, nach dem Verstreichen der Zeitverzögerung, kann auch die Lithiumbatterie Strom an den Startermotor liefern.In a further embodiment of the invention, it may be provided that the battery assembly comprises a lead-acid battery and a lithium battery. The lead acid battery can first be electrically connected to the starter motor, while the lithium battery powers the electrical system, then, after the lapse of the time delay, the lithium battery can supply power to the starter motor.
Daneben betrifft die Erfindung ein Kraftfahrzeug, das erfindungsgemäße Kraftfahrzeug weist eine Startvorrichtung der beschriebenen Art auf.In addition, the invention relates to a motor vehicle, the motor vehicle according to the invention has a starting device of the type described.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen erläutert. Die Zeichnungen sind schematische Darstellungen und zeigen:The invention will be explained below with reference to an embodiment with reference to the drawings. The drawings are schematic representations and show:
Die Startvorrichtung
Das Steuergerät
Nachfolgend wird auf die
In
Im Unterschied dazu erkennt man in
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102009046796 A1 [0004] DE 102009046796 A1 [0004]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210004790 DE102012004790A1 (en) | 2012-03-07 | 2012-03-07 | Starter for combustion engine of motor car, has control unit adapted to start only when battery is electrically connected with motor while another battery is switched-on with time delay and emits no power at start |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210004790 DE102012004790A1 (en) | 2012-03-07 | 2012-03-07 | Starter for combustion engine of motor car, has control unit adapted to start only when battery is electrically connected with motor while another battery is switched-on with time delay and emits no power at start |
Publications (1)
Publication Number | Publication Date |
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DE102012004790A1 true DE102012004790A1 (en) | 2013-09-12 |
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ID=49029371
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Application Number | Title | Priority Date | Filing Date |
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DE201210004790 Ceased DE102012004790A1 (en) | 2012-03-07 | 2012-03-07 | Starter for combustion engine of motor car, has control unit adapted to start only when battery is electrically connected with motor while another battery is switched-on with time delay and emits no power at start |
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DE (1) | DE102012004790A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009046796A1 (en) | 2009-11-18 | 2011-05-19 | Robert Bosch Gmbh | Circuit arrangement for starting device for starting internal combustion engine, particularly motor vehicle, has electrical machine, particularly starter motor and current limiting device for current limitation of electrical machine |
-
2012
- 2012-03-07 DE DE201210004790 patent/DE102012004790A1/en not_active Ceased
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009046796A1 (en) | 2009-11-18 | 2011-05-19 | Robert Bosch Gmbh | Circuit arrangement for starting device for starting internal combustion engine, particularly motor vehicle, has electrical machine, particularly starter motor and current limiting device for current limitation of electrical machine |
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