EP1464833A2 - Verfahren zum Aufbereiten eines Luft-Kraftstoff-Gemisches für Direktstarts einer Brennkraftmaschine - Google Patents
Verfahren zum Aufbereiten eines Luft-Kraftstoff-Gemisches für Direktstarts einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP1464833A2 EP1464833A2 EP04100616A EP04100616A EP1464833A2 EP 1464833 A2 EP1464833 A2 EP 1464833A2 EP 04100616 A EP04100616 A EP 04100616A EP 04100616 A EP04100616 A EP 04100616A EP 1464833 A2 EP1464833 A2 EP 1464833A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion engine
- fuel
- internal combustion
- cylinder
- direct
- 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- Withdrawn
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Classifications
-
- 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
- F02N99/00—Subject matter not provided for in the other groups of this subclass
- F02N99/002—Starting combustion engines by ignition means
- F02N99/006—Providing a combustible mixture inside the cylinder
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
- F02D2041/0095—Synchronisation of the cylinders during engine shutdown
-
- 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
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- 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 specially adapted for starting of engines
- F02N11/0814—Circuits specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
-
- 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
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/005—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
-
- 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
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/005—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
- F02N2019/007—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation using inertial reverse rotation
-
- 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
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/005—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
- F02N2019/008—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation the engine being stopped in a particular position
Definitions
- the present invention relates to a method for processing an air-fuel mixture for direct starts one Internal combustion engine according to the preamble of the claim 1.
- a disadvantage of the known starting methods is that they can only be used with direct injection at which the fuel is injected directly into the cylinder becomes.
- indirect injection also channel or called intake manifold injection, the fuel against e.g. into the intake manifold, the intake duct or the throttle body injected. Therefore it is not possible bring fuel into the cylinder before starting because the Intake valves are only open during the intake phase. moreover there is no air flow to atomize the Fuel or to take away the air / fuel mixture present in the cylinder.
- direct start method not even with carburetor engines used.
- the present invention is based on the object Process for the optimal preparation of an air-fuel mixture for direct starts of an internal combustion engine, which is both direct and indirect Fuel injection can be used.
- the electronic Operating control device controlled operating mode with direct starts the cylinder during the respective shutdown phase the internal combustion engine a predetermined amount of fuel fed.
- the amount of fuel introduced during the shutdown phase depends on the ambient conditions (e.g. cooling temperature of the engine, temperature of the cylinder contents, ambient pressure, ...) and is controlled by the electronic operating control unit (Electronic Control Unit, ECU) according to a model calculated. After the injection, the Ignition of this cylinder suppressed.
- ECU Electronic Control Unit
- the cylinder in the shutdown phase by indirect fuel injection loaded.
- the fuel into the intake manifold, the intake duct or the throttle body injected.
- the cylinder in the shutdown phase by direct fuel injection loaded into the cylinder.
- Direct injection is provided that during each Restarts the engine an additional Amount of fuel injected into the cylinder in question if the period between switch-off and restart start of the internal combustion engine exceeds a predetermined threshold. This way you can start again required amount of fuel depending on the particular Ensure the operating state of the internal combustion engine.
- the amount is used to further refine this procedure the additional amount of fuel depending on the Time between switching off and restarting the internal combustion engine controlled. This allows fine tuning of the amount of fuel to be injected to the respective operating conditions the internal combustion engine.
- the engine is started by a starter / generator rotated to a suitable starting position.
- the Starter / generator can be firmly connected to the crankshaft be (integrated starter / generator) or by a belt be coupled with this (belt-operated starter / generator).
- Draw both types of starter / generators is characterized by the crankshaft in both directions turn and thus position the motor as desired. This can be used to start the engine before the first Ignition on direct start e.g. to turn back slightly recompression of the mixture in the first ignited Reach cylinder.
- This also makes a direct start at one Cold start enables and if necessary when starting in stop / start mode electrical energy saved.
- crankshaft is also directly started by the starter motor or driven by a starter / generator.
- This Embodiment becomes the torque required to start partly from the electrical machine and partly delivered by the combustion of the mixture in the cylinder.
- the method according to the invention makes itself the thermal and thermodynamic states and flow conditions in the cylinders while the Take advantage of the internal combustion engine for optimal mixture preparation to ensure for the respective restart.
- EMS electronic operating control
- FIG. 1 shows a flow diagram of a first exemplary embodiment of the method according to the invention.
- Fig. 2 shows a timing diagram of four cylinders when coasting and direct start according to a second embodiment of the method according to the invention.
- the first exemplary embodiment is based on a spark-ignited, multi-cylinder internal combustion engine (not shown) with described direct fuel injection, their operation from an electronic operation control device (not shown) is controlled.
- the internal combustion engine can be under the control of the electronic Operating control device in an operating mode (instant Start mode) are operated in which the internal combustion engine switched off repeatedly and then by means of direct starts again is started.
- instant Start mode an operating mode
- the time between shutdown and restart the internal combustion engine are dependent on the Different activation of the restart process by the driver long.
- the internal combustion engine BKM is in the instant start Mode, so the operation of the engine on shutdowns monitored (step 1).
- step 2 the first when the internal combustion engine is restarted is put into operation (step 2). It is about this is the cylinder whose piston is the last in the top dead center position after the extension stroke was. This cylinder can therefore be used by the electronic operating control unit can be easily identified.
- a predetermined one Fuel quantity injected (step 3).
- the default The amount of fuel is a minimum or nominal amount.
- this early (first) Fuel injection due to the shutdown phase prevailing thermal and thermodynamic states and flow conditions for an optimal preparation of the Fuel-air mixture.
- Step 4 When the engine came to a complete stop (step 4), a timer is started, to measure the time from when the engine stops (Step 5).
- step 6 When a driver-induced activation of a new start of the internal combustion engine (step 6), the time period that has elapsed since the internal combustion engine stopped is read out (step 7). If this period is less than a predetermined threshold T min (step 8), an additional fuel injection is not necessary. The amount of fuel injected during the shutdown phase is then sufficient for a restart.
- T min a predetermined threshold
- step 8 If, on the other hand, the elapsed time period is greater than the threshold T min (step 8), an additional amount of fuel is injected (step 9).
- Step 10 Another direct start of the internal combustion engine (Step 10), whereupon the internal combustion engine in normal operation continues.
- the procedure outlined for the Mixture preparation in instant start mode then starts again from the front.
- Fig. 2 shows a timing diagram, which the processes when switching off and restarting a multi-cylinder engine with indirect Injection according to a second embodiment of the invention.
- the engine has four cylinders 1 to 4, each of which times marked with the lightning arrows become. The injection takes place to those marked with 16 Times instead.
- the individual work cycles are separated from each other by vertical lines, which in Distances of 180 ° of the crankshaft are arranged.
- the times, in which the exhaust valves are open are through shaded bars from bottom left to top right; the times when the intake valves are open are hatched by from top left to bottom right Marked bars.
- the arrow 17 indicates the stopping phase of the engine Park during which the dash-dotted vertical
- the stop position of the motor shown in line is determined becomes. This is done by the engine outlet models, which are not described here. In the example shown, it is determined that cylinder 1 during the expansion phase Will come to a standstill, while the cylinder 3 during the compression phase. Accordingly, the cylinder 1 is selected to fired first at a later direct start to become. The one that normally takes place at time 19 Ignition of the cylinder 1 is therefore suppressed.
- the amount of fuel injected in the outlet is a function the engine temperature.
- Starter / generator can optionally the engine before the direct start 90 ° of the crankshaft, as by the arrow 18 indicated. This will put the fuel in the cylinder 1 compressed again and thereby the cold start ability improved.
- the cylinder is called by the compression Lich heated and evaporated condensed fuel if necessary.
- cylinder 1 is the first ignited when the engine is not running, as with an asterisk marked lightning-like arrow.
- the ignition takes place of the next cylinder (here cylinder 3), which also had previously been injected in the shutdown phase.
- cylinder 4 As next follows an ignition in cylinder 4, but this is only is filled with fuel during the starting process, accordingly of those indicated by the numbers on the right Sequence.
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)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims (7)
- Verfahren zum Aufbereiten eines Luft-Kraftstoff-Gemisches für Direktstarts einer Brennkraftmaschine mit mindestens einem Zylinder und mit Kraftstoffeinspritzung, bei dem die Brennkraftmaschine in einem vorgegebenen Betriebsmodus unter der Steuerung eines elektronischen Betriebssteuergerätes wiederholt abgeschaltet und mittels Direktstarts wieder gestartet wird,
dadurch gekennzeichnet, dass in dem vorgegebenen Betriebsmodus dem Zylinder bereits während der jeweiligen Abschaltphase der Brennkraftmaschine eine vorgegebene Kraftstoffmenge zugeführt wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass dem Zylinder die vorgesehene Kraftstoffmenge durch indirekte Kraftstoffeinspritzung zugeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass dem Zylinder die vorgesehene Kraftstoffmenge durch direkte Kraftstoffeinspritzung zugeführt wird.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass während des jeweiligen Wiederstarts der Brennkraftmaschine eine zusätzliche Kraftstoffmenge in den Zylinder eingespritzt wird, falls die Zeitspanne zwischen Abschaltung und Wiederstart der Brennkraftmaschine eine vorgegebene Schwelle überschreitet.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Betrag der zusätzlichen Kraftstoffmenge in Abhängigkeit von der Zeitspanne zwischen Abschaltung und Wiederstart der Brennkraftmaschine gesteuert wird.
- Verfahren nach einem der vorhergehenden Ansprüche für eine Brennkraftmaschine mit mehreren Zylindern, dadurch gekenn zeichnet, dass bei der jeweiligen Abschaltung der Brennkraftmaschine derjenige Zylinder bestimmt wird, in dem beim Wiederstart der Brennkraftmaschine als erstem ein Verbrennungsvorgang erfolgt, und dass die vorgegebene Kraftstoffmenge während der jeweiligen Abschaltphase diesem Zylinder zugeführt wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Motor vor dem Direktstart durch einen Starter/Generator in eine geeignete Startposition gedreht wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10315284 | 2003-04-03 | ||
| DE10315284 | 2003-04-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1464833A2 true EP1464833A2 (de) | 2004-10-06 |
| EP1464833A3 EP1464833A3 (de) | 2008-06-11 |
Family
ID=32842241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04100616A Withdrawn EP1464833A3 (de) | 2003-04-03 | 2004-03-03 | Verfahren zum Aufbereiten eines Luft-Kraftstoff-Gemisches für Direktstarts einer Brennkraftmaschine |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1464833A3 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010086535A1 (fr) | 2009-01-28 | 2010-08-05 | Renault S.A.S. | Systeme et procede de controle de demarrage de moteur a combustion interne |
| EP3126655A4 (de) * | 2014-03-31 | 2017-11-08 | Cummins, Inc. | Schnelle motorsynchronisierung zur neustartverwaltung |
| DE102019000340B4 (de) | 2018-01-17 | 2024-07-11 | Suzuki Motor Corporation | Kraftstoffeinspritzsteuervorrichtung und Kraftstoffeinspritzsteuersystem |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741294A1 (de) | 1997-09-19 | 1999-03-25 | Bosch Gmbh Robert | Antrieb eines Kraftfahrzeuges |
| DE19743492A1 (de) | 1997-10-01 | 1999-04-15 | Bosch Gmbh Robert | Verfahren zum Starten einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2827911B1 (fr) * | 2001-07-27 | 2004-01-30 | Peugeot Citroen Automobiles Sa | Procede de reglage de l'arret et procede de redemarrage d'un moteur a combustion interne |
| JP3571014B2 (ja) * | 2001-08-30 | 2004-09-29 | 本田技研工業株式会社 | 内燃機関の自動停止始動制御装置 |
| JP3821090B2 (ja) * | 2002-10-22 | 2006-09-13 | トヨタ自動車株式会社 | 内燃機関の始動制御装置 |
| DE10310301A1 (de) * | 2003-03-10 | 2004-09-23 | Robert Bosch Gmbh | Verfahren und Steuerung eines Verbrennungsmotors in einem Start-Stopp-Betrieb |
-
2004
- 2004-03-03 EP EP04100616A patent/EP1464833A3/de not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19741294A1 (de) | 1997-09-19 | 1999-03-25 | Bosch Gmbh Robert | Antrieb eines Kraftfahrzeuges |
| DE19743492A1 (de) | 1997-10-01 | 1999-04-15 | Bosch Gmbh Robert | Verfahren zum Starten einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010086535A1 (fr) | 2009-01-28 | 2010-08-05 | Renault S.A.S. | Systeme et procede de controle de demarrage de moteur a combustion interne |
| EP3126655A4 (de) * | 2014-03-31 | 2017-11-08 | Cummins, Inc. | Schnelle motorsynchronisierung zur neustartverwaltung |
| DE102019000340B4 (de) | 2018-01-17 | 2024-07-11 | Suzuki Motor Corporation | Kraftstoffeinspritzsteuervorrichtung und Kraftstoffeinspritzsteuersystem |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1464833A3 (de) | 2008-06-11 |
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