EP1444431A1 - Verfahren zur steuerung und regelung des startbetriebs einer brennkraftmaschine - Google Patents
Verfahren zur steuerung und regelung des startbetriebs einer brennkraftmaschineInfo
- Publication number
- EP1444431A1 EP1444431A1 EP02803011A EP02803011A EP1444431A1 EP 1444431 A1 EP1444431 A1 EP 1444431A1 EP 02803011 A EP02803011 A EP 02803011A EP 02803011 A EP02803011 A EP 02803011A EP 1444431 A1 EP1444431 A1 EP 1444431A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mode
- control
- rail pressure
- internal combustion
- combustion 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 239000013642 negative control Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000013641 positive control Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- 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
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- 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
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- 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
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
- F02D41/1488—Inhibiting the regulation
- F02D41/149—Replacing of the control value by an other parameter
Definitions
- the invention relates to a method for controlling and regulating the starting process of an internal combustion engine according to the preamble of the first claim.
- DE 199 16 100 A1 describes a method for starting an internal combustion engine with a common rail injection system.
- a first mode is set.
- an attempt is made to increase the rail pressure as quickly as possible.
- the rail pressure and / or the speed of the internal combustion engine are compared with a limit value. As long as these are below the limit, the first mode remains set and the pressure build-up in the rail is controlled. If these are above the limit, a second mode is set. The control of the rail pressure is activated in the second mode.
- the invention is based on the object of making the starting process safer.
- the object is achieved by a method for controlling and regulating the starting process with the features of the first claim.
- the configurations for this are shown in the subclaims.
- the invention provides that when the second mode is set for the first time, it is retained for the further starting process.
- the rail pressure is therefore also regulated when it falls below a limit value, for example a regulator release pressure.
- Regulator release pressure is the pressure at which the high pressure control is released.
- a control signal for a pressure control means in particular a suction throttle, calculated in such a way that full fuel delivery is guaranteed.
- the control signal is tracked if it is determined as a function of the engine speed. If the rail pressure sensor fails, emergency operation is activated. When emergency operation is activated, the engine speed is set as the decisive parameter for the starting process.
- the invention offers the advantage that a stable, steady state of the overall system is achieved at an earlier point in time. No additional sensor signals and output signals for actuators are required to implement the function, so that it can be applied with little effort.
- Figure 1 is a block diagram of the overall system Figure 2 is a timing diagram
- Figure 3 shows a program flow chart, normal operation
- Figure 4 is a program flow chart, emergency operation
- the common rail injection system comprises a first pump 4, a suction throttle 5, a second pump 6, a high-pressure accumulator and injectors 8.
- the high-pressure accumulator is referred to as rail 7.
- the first pump 4 delivers the fuel from a fuel tank 3 to the suction throttle 5.
- the pressure level after the first pump 4 is, for example, 3 bar.
- the volume flow to the first pump 6 is determined via the suction throttle 5.
- the second pump 6 in turn conveys the fuel under high pressure into the rail 7.
- the pressure level in the rail 7 is more than 1200 bar in diesel engines.
- the injectors 8 are connected to the rail 7. The fuel is injected into the combustion chambers of the internal combustion engine 1 through the injectors 8.
- the internal combustion engine 1 is controlled and regulated by an electronic control unit 1 1 (EDC).
- EDC electronic control unit 1 1
- the electronic control unit 11 contains the usual components of a microcomputer system, for example a microprocessor, I / O modules, buffers and Memory modules (EEPROM, RAM).
- the operating data relevant to the operation of the internal combustion engine 1 are applied in characteristic diagrams / characteristic curves in the memory modules.
- the electronic control unit 11 uses this to calculate the output variables from the input variables.
- the following input variables are shown by way of example in FIG. 1: a rail pressure pCR, which is measured by means of a rail pressure sensor 10, the rotational speed nMOT of the internal combustion engine 1, a power request FW, an internal cylinder pressure pIN, which is measured by means of pressure sensors 9, and an input variable E.
- the input variable E includes, for example, the charge air pressure pLL of the turbocharger 2 and the temperatures of the coolants and lubricants.
- 1 shows a signal ADV for controlling the suction throttle 5 and an output variable A as the output variables of the electronic control unit 11.
- the output variable A represents the other control signals for controlling and regulating the internal combustion engine 1, for example the start of injection BOI and the injection quantity ve.
- the control signal ADV is designed as a PWM signal (pulse width modulated), via which a corresponding current value for the suction throttle 5 is set. At a current value of almost zero, the suction throttle 5 is completely open, ie the volume flow delivered by the first pump 4 reaches the second pump 6 without hindrance.
- control in positive logic is also possible, ie the suction throttle 5 is fully open at a maximum current value .
- the rail pressure pCR is operated in a control loop.
- the control signal ADV corresponds to the manipulated variable.
- the suction throttle 5, the second pump 6 and the rail 7 correspond to the controlled system.
- Figure 2 consists of the sub-figures 2A to 2D.
- the starting process of an internal combustion engine is shown.
- 2A shows a state diagram of the modes
- FIG. 2B the engine speed nMOT
- FIG. 20 the rail pressure pCR
- FIG. 2D the control signal ADV corresponding to the current value for the suction throttle 5.
- FIGS. 2A, 20 and 2D there are two case distinctions executed.
- the signal line for a starting process according to the prior art is shown as a solid line.
- the signal curve according to the invention is shown as a dotted line.
- a rail pressure setpoint value SW and a limit value are shown in FIG. 20 parallel to the abscissa.
- the limit value corresponds to a regulator release pressure RFD.
- a constant setpoint SW is assumed. The method according to the prior art proceeds as follows:
- the starting process is activated by energizing the starter.
- the crankshaft of the internal combustion engine begins to rotate.
- MOD a signal level of one
- the engine speed nMOT increases until it reaches a starter speed n1 at the time t2. Since the second pump 6 is mechanically connected to the crankshaft, this begins to deliver the fuel into the rail 7 when the crankshaft is rotated. This increases the rail pressure pCR.
- the control signal ADV for the suction throttle 5 is selected so that a maximum fuel delivery occurs.
- the control signal ADV is set to a first current value i 1.
- the first current value i1 is shown in FIG. 2D as a constant value in the period t1 to t3.
- the first current value i1 can also be calculated as a function of the engine speed nMOT.
- the rail pressure pCR exceeds the regulator release pressure RFD, point D.
- the signal value therefore changes from one to two.
- the control signal ADV of the throttle valve 5 is set to a second current value i2.
- the rail pressure pCR is regulated.
- There is a negative control deviation in point D This corresponds to the difference between the rail pressure pCR at point D and the setpoint SW, as shown in FIG. 2C.
- the time stage t (BOI) has expired, so that the injection into the combustion chambers of the internal combustion engine 1 begins. This increases the engine speed nMOT. Due to the quantity of fuel withdrawn, the rail pressure pCR decreases until it falls below the regulator release pressure RFD at point E at point E5. As a follow-up reaction, the first mode is set again at time t5, ie the signal curve in FIG. 2A changes to the value one. At the same time, the control signal ADV is reset to the first current value i1. Since the suction throttle 5 is now completely open again, the rail pressure pCR begins to rise again until it exceeds the regulator release pressure RFD again at point t in point F.
- the first mode is set again and the second current value i2 is calculated again for the control signal ADV.
- This oscillation of the rail pressure pCR, the modes and the control signal ADV continues until time t8.
- engine speed nMOT reaches idling value n2.
- the second mode is only maintained from this point on. Only then is the overall system in a steady state.
- the signal curve corresponds to the previous description.
- the second mode is maintained.
- the signal curve of FIG. 2A therefore retains value 2 at point A.
- the second mode remains set until time t8, point B.
- the control signal ADV remains at the second current value i2 due to the negative control deviation.
- the control deviation is zero.
- the rail pressure pCR falls below the rail pressure setpoint SW. Due to the now positive control deviation, the control signal ADV for the suction throttle 5 is calculated in accordance with the curve with the points G and H.
- the point H corresponds, for example, to a third current value i3.
- For the rail pressure pCR there is a curve with the points K and L.
- the starting process ends when idling speed n2 is reached.
- the engine speed nMOT can be used as a parameter for switching from the first to the second mode instead of the rail pressure pCR.
- the controller release speed RGD is shown in FIG. 2B.
- FIG. 3 shows a program flow chart for the execution of the method in normal operation.
- the subroutine normal operation is called in step S1. Normal operation is when the measured values of the rail pressure sensor 10 are plausible.
- S2 it is checked whether the engine is at a standstill, i.e. the initialization phase is still running.
- step S3 If the internal combustion engine has already been put into operation, query S2 is negative, it is checked in step S3 whether the rail pressure pCR is greater than a limit value GW.
- this limit value GW corresponds to the controller enable pressure (RFD), for example 650 bar. If the rail pressure pCR is still below the limit value, S6 checks whether the second mode has already been set. If this is not the case, the control signal ADV is set to zero at S7 and the program flowchart branches to S10. If the query in step S6 shows that the second mode is already set, the program flowchart branches to point A.
- the second mode is set at S4.
- the control signal ADV is then calculated at S5 and set to the corresponding current value, for example i2.
- FIG. 4 shows a program flow chart for the method in emergency operation.
- the emergency operation subroutine is called when the measured values of the rail
- Pressure sensor 10 are not plausible, for example in the event of a short circuit.
- the emergency operation subroutine is also called if a faulty rail pressure sensor was already detected during operation of the internal combustion engine before it was stopped.
- the program flow chart according to FIG. 4 differs in step S3.
- the query is not based on the rail pressure pCR, but on the engine speed nMOT.
- the rest of the procedure corresponds to that of FIG. 3, so that what has been said there applies.
- Reference number I is
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
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10156637 | 2001-11-17 | ||
| DE10156637A DE10156637C1 (de) | 2001-11-17 | 2001-11-17 | Verfahren zur Steuerung und Regelung des Startbetriebs einer Brennkraftmaschine |
| PCT/EP2002/012600 WO2003042523A1 (de) | 2001-11-17 | 2002-11-12 | Verfahren zur steuerung und regelung des startbetriebs einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1444431A1 true EP1444431A1 (de) | 2004-08-11 |
| EP1444431B1 EP1444431B1 (de) | 2007-07-04 |
Family
ID=7706170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02803011A Expired - Lifetime EP1444431B1 (de) | 2001-11-17 | 2002-11-12 | Verfahren zur steuerung und regelung des startbetriebs einer brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7025028B2 (de) |
| EP (1) | EP1444431B1 (de) |
| DE (2) | DE10156637C1 (de) |
| WO (1) | WO2003042523A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004039311B4 (de) * | 2004-08-13 | 2014-05-22 | Robert Bosch Gmbh | Verfahren und Steuergerät zur Steuerung eines Enspritzdruckaufbaus bei einem Start eines Verbrennungsmotors |
| JP2006200478A (ja) * | 2005-01-21 | 2006-08-03 | Denso Corp | 燃料噴射装置 |
| DE102005029138B3 (de) * | 2005-06-23 | 2006-12-07 | Mtu Friedrichshafen Gmbh | Steuer- und Regelverfahren für eine Brennkraftmaschine mit einem Common-Railsystem |
| DE102007027943B3 (de) | 2007-06-18 | 2008-10-16 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung des Raildrucks während eines Startvorgangs |
| DE102007035316B4 (de) * | 2007-07-27 | 2019-12-24 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Magnetventils einer Mengensteuerung in einer Brennkraftmaschine |
| DE102009050468B4 (de) * | 2009-10-23 | 2017-03-16 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung und Regelung einer Brennkraftmaschine |
| DE102012008538B4 (de) * | 2012-01-30 | 2014-05-15 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung und Regelung einer Brennkraftmaschine |
| FR2991390B1 (fr) * | 2012-06-04 | 2015-11-27 | Peugeot Citroen Automobiles Sa | Procede de commande d'un moteur a combustion interne |
| DE102013000060B3 (de) * | 2013-01-02 | 2014-05-22 | Mtu Friedrichshafen Gmbh | Verfahren und Regeleinrichtung zum Betreiben einer Brennkraftmaschine |
| DE102016207297B3 (de) | 2016-04-28 | 2017-10-19 | Mtu Friedrichshafen Gmbh | Verfahren zum Betrieb einer Brennkraftmaschine, Einrichtung zum Steuern und/oder Regeln einer Brennkraftmaschine, Einspritzsystem und Brennkraftmaschine |
| DE102019216509B3 (de) * | 2019-10-25 | 2021-02-11 | Mtu Friedrichshafen Gmbh | Verfahren zum Starten einer Brennkraftmaschine sowie Brennkraftmaschine zur Durchführung eines solchen Verfahrens |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3317202B2 (ja) * | 1997-08-04 | 2002-08-26 | トヨタ自動車株式会社 | 蓄圧式エンジンの燃料噴射制御装置 |
| EP0930426B1 (de) * | 1998-01-13 | 2003-12-03 | Siemens Aktiengesellschaft | Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen |
| JPH11247683A (ja) * | 1998-02-27 | 1999-09-14 | Isuzu Motors Ltd | エンジンの燃料噴射装置 |
| EP1008741B1 (de) * | 1998-11-20 | 2003-04-02 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Kraftstoffeinspritzvorrichtung der Accumulatorgattung |
| DE19916100A1 (de) * | 1999-04-09 | 2000-10-12 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
| US6293251B1 (en) * | 1999-07-20 | 2001-09-25 | Cummins Engine, Inc. | Apparatus and method for diagnosing erratic pressure sensor operation in a fuel system of an internal combustion engine |
-
2001
- 2001-11-17 DE DE10156637A patent/DE10156637C1/de not_active Expired - Fee Related
-
2002
- 2002-11-12 WO PCT/EP2002/012600 patent/WO2003042523A1/de not_active Ceased
- 2002-11-12 EP EP02803011A patent/EP1444431B1/de not_active Expired - Lifetime
- 2002-11-12 US US10/495,658 patent/US7025028B2/en not_active Expired - Fee Related
- 2002-11-12 DE DE50210426T patent/DE50210426D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03042523A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10156637C1 (de) | 2003-05-28 |
| WO2003042523A1 (de) | 2003-05-22 |
| US20050011496A1 (en) | 2005-01-20 |
| EP1444431B1 (de) | 2007-07-04 |
| US7025028B2 (en) | 2006-04-11 |
| WO2003042523A8 (de) | 2004-05-21 |
| DE50210426D1 (de) | 2007-08-16 |
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