EP1526268A2 - Méthode de régulation de la pression d'un accumulateur de carburant dans un moteur à combustion interne - Google Patents

Méthode de régulation de la pression d'un accumulateur de carburant dans un moteur à combustion interne Download PDF

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Publication number
EP1526268A2
EP1526268A2 EP04018196A EP04018196A EP1526268A2 EP 1526268 A2 EP1526268 A2 EP 1526268A2 EP 04018196 A EP04018196 A EP 04018196A EP 04018196 A EP04018196 A EP 04018196A EP 1526268 A2 EP1526268 A2 EP 1526268A2
Authority
EP
European Patent Office
Prior art keywords
control
switching
control mode
pressure
mode
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
Application number
EP04018196A
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German (de)
English (en)
Other versions
EP1526268B1 (fr
EP1526268A3 (fr
Inventor
Guenter Veit
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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
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Publication of EP1526268A2 publication Critical patent/EP1526268A2/fr
Publication of EP1526268A3 publication Critical patent/EP1526268A3/fr
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Publication of EP1526268B1 publication Critical patent/EP1526268B1/fr
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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
    • F02D41/30—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
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
    • 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1418—Several control loops, either as alternatives or simultaneous
    • 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

Definitions

  • the invention relates to a method for regulating the pressure in a fuel storage of an internal combustion engine, in particular a common rail system. Furthermore The invention relates to a computer program and a Device for carrying out this method.
  • a first and a second control circuit for regulating the pressure in one Provide fuel storage.
  • a first control mode Only the first control loop for regulating the Pressure used, the pressure in the Fuel storage by suitable control of a High-pressure pump is controlled as a pressure control means.
  • a second control mode is provided at the pressure regulation with the help of the second control circuit via a pressure control valve, which is immediately on the fuel tank acts.
  • Operating condition of the internal combustion engine is either the first or second control mode for pressure control used. For example, a switching operation of the first to the second control mode then take place when certain values for the speed or the injected Fuel quantity in a given operating condition of Internal combustion engine to be exceeded.
  • suitable criteria Are defined.
  • This object is achieved by the in claim 1 claimed method solved.
  • This procedure is thereby characterized in that for carrying out the switching operation open the control loops involved in the switching process be replaced by their control devices instead of the previous input signal for preferably each Changeover individually Umschalteingangssignalen be controlled, which is so are formed, that the control devices in desired way of one by the current control mode defined current operating state in one by the future rule mode defined future Operating state to be transferred.
  • This claimed procedure for performing a Switching from a current rule mode to a future control mode offers the advantage of that unwanted disturbances of the rail pressure during the Shifting be avoided. According to the invention this in the way that the on the switching process involved control circuits by the switching input signal in a steady way from its activated or deactivated Operating state during the current control mode in their new activated or deactivated operating state during the future control mode.
  • Switching represents the switching input signal advantageously for each Umschaltvörgang individually suitable control values.
  • the in Frame of a switching process from an activated in a deactivated operating state or vice versa changes, opens to carry out the switching process, that is, the control loop is used for the duration of the Switchover process separated.
  • the Control device of the separated loop then not more with the input signal, but with the switching input signal operated by the switching input signal represented control value at least Approximately to the last of the control device adjusted control deviations is adjusted. To this Way is as smooth as possible or homogeneous Transition from the current rule mode to the Switchover guaranteed.
  • the switching control signal is from the given control values and one on this connected rail pressure deviation formed.
  • Rail pressure deviation causes a correction of the fixed predetermined control values with respect to a current Pressure situation in the fuel storage 200, depending on Amount and sign of this pressure deviation the Speed with which the pressure in the Fuel storage 200 is regulated, in terms of current pressure situation there is positively influenced.
  • the connection of the rail pressure control deviation causes in addition, that caused by the switching process Pressure deviation in the fuel tank 200 as low as possible is held.
  • transitions between stationary control operation and Switching process will continue in both directions thereby smoothed or homogenized that during the switching one by the switching input signal Conditional shift of the operating point at at least the control device is monitored, the during the switching process from an activated in a deactivated operating state or vice versa replaced. It is then for homogenization purposes advantageous when the transition from the switching operation in the future control mode only then actually through Disconnecting the switching input signal and clamping the usual input signal to the regulator device completed if at least the monitored control device their activated for the future control mode or has reached deactivated operating state.
  • FIG. 1 shows the structure of the device according to the invention 100 for regulating the pressure in a fuel storage 200 an internal combustion engine (not shown here) according to the Invention.
  • the fuel storage is in particular a so-called common rail.
  • the device comprises a first control loop 110 with a first subtraction device 112 for providing a control deviation r1, a first control device 114 and a throttle valve 116 as an actuator.
  • This first control circuit regulates via the throttle valve 116, the high-pressure pump 210 supplied Kraftstcffmenge.
  • the first control circuit ensures that precisely the amount of fuel which is predetermined via a setpoint signal S M-setpoint of the subtraction unit 112 is supplied to the high-pressure pump 210 via the throttle valve 116.
  • the difference formation device 112 performs a continuous comparison between the desired fuel quantity requested by the desired quantity signal S M-desired and the actual fuel quantity actually provided by the throttle valve 116 and represented by the actual quantity signal S M-ist a possibly determined difference r1 between the setpoint and the actual set as quantity deviation.
  • This quantity deviation r1 is output to the control device 114 during steady-state operation of the first control loop as a control deviation in the form of an input signal e1.
  • the amount of fuel actually metered by the throttle valve 116 is not detected at the outlet of the throttle valve 116 by means of a flow meter, but instead the control variable at the output of the first control device 114 is represented as a representative of the actually set actual fuel quantity is evaluated. Due to a physically unambiguous assignment between this control variable and the actually set fuel quantity, this tap according to FIG. 1 is equally effective as a direct detection of the flow rate.
  • the first control loop 110 controls initially only the high pressure pump 210 supplied Fuel quantity.
  • the high pressure pump 210 is over a fuel line 220 to the fuel storage 200th connected.
  • About the control of the fuel tank 200 amount of fuel supplied by means of the first Control circuit can therefore indirectly also the pressure in the Fuel storage to be controlled.
  • the device 100 furthermore comprises a second control circuit 120.
  • This comprises a second difference-forming device 122, which represents a possible deviation between a predetermined desired pressure, represented by a signal S D-desired and that of a.
  • Pressure sensor 230 measured actual pressure in the fuel reservoir 200, represented by a signal S D-actual detected.
  • the second control circuit 120 further comprises a second control device 124 which receives the pressure deviation r2 detected by the second subtraction device 122 during stationary control operation in the form of an input signal e2 and controls a pressure control valve 126 in response to this pressure deviation r2 which is directly dependent on the pressure in Fuel tank 200 acts.
  • the second control circuit therefore carries out a direct regulation of the pressure in the fuel accumulator.
  • the first and second control circuits 110, 120 can be operated both individually and simultaneously, that is to say in parallel. Thus, in a first control mode only the first control loop 110 and in a second control mode only the second control loop 120 is activated, while in a third control mode the first and the second control loop 110, 120 are activated simultaneously.
  • the decision as to which of the three aforementioned control modes the device according to FIG. 1 is operated takes place in response to a control mode signal S R , which specifies a current or future control mode, in particular as a function of a current operating state of the internal combustion engine. It can be seen in FIG. 1 that this control mode signal S R is fed to a control management device 130, in which, inter alia, preferably the two difference-forming devices 112 and 122 already mentioned are integrated.
  • This rule management device 130 is designed to control the respective control devices 114, 124 of the two control circuits 110, 120 in response to a respectively desired control mode represented by the control mode signal S R.
  • Figure 2 shows the structure of the rule management device 130 according to the invention.
  • the input signals of this device 130 were mentioned with reference to Figure 1; they are designated in Figure 2 with the same reference numerals.
  • the rule management device 130 in addition to the two differentiation devices 120, 122, also has a memory device 132 for storing and providing predetermined control values. These control values substantially shape the switching input signals u1, u2 for the controllers 114, 124 during a switching operation.
  • the rule management device 130 comprises a first and a second switching device 134, 136 for generating the first and second input signals e1, e2 for the first and the second control device 114, 124 during stationary control operation in one of the three said control modes or for generating the switching input signal u1, u2 for at least one of the control devices 114, 124 during a switching process.
  • the rule management device 130 comprises a control device 138 for controlling the memory device 132 and the switching devices 134, 136 in response to the control mode signal S R via control signals St1, St2 and St3.
  • Rule management device 130 The operation of the illustrated in Figure 2 Rule management device 130 according to the invention detailed below. It is between a stationary control operation of the device 100 in the three named rule modes and between the possible Transition operations between these rule modes distinguished.
  • the works Rule management device 130 controls the first one Switching device 134 via the first control signal St1 so on that the switching device 134 at its output the Input signal e1 for the first control device 114 so trains that of the second Differentializer 112 provided Pressure deviation r2 represents.
  • the Control device 138, the second switching device 136th via the control signal St2 in such a way that the Switching 136, the input signal e2 for the second controller 124 based on predetermined Generated tax values.
  • control values become the second switching means 136 through the Memory device 132 provided after this the third control signal St3 of the control device 138 was informed about which control values from which Memory addresses within memory device 132 currently output to the second switching device 136 are.
  • the control values are preferably so in this case predetermined that they the second controller 124 in an inactive, that is disabled state hold.
  • the control values may also be a Shutdown of the second control device, preferably in cause a standby mode.
  • the works Rule management device 130 In an operation of the device 100 during the second Control mode, during which the pressure in the Fuel tank 200 only with the help of the second Control loop 120 is regulated, the works Rule management device 130 as follows. With her first and third control signal St1, St3, it controls the Memory device 132 and the first switching device 134 in an analogous manner, as the second Switching device 136 during the last paragraph described operation in the first control mode. The first Switching device 134 then generates an input signal e1 for the first controller 114 based on suitable, by the memory device 132nd provided control values. These control values are then designed to be the first control device disable or switch off.
  • the second switching means 136 When operating in the second Control mode, the second switching means 136 through the second control signal St2 of the control device 138 so that they are the input signal e2 for the second Regulating device 124 from that of the second Differentializer 122 provided Pressure deviation r2 forms.
  • the rule management device 130 operates as follows.
  • the Control device 138 controls over the first Control signal St1 the first switching means 134 so, that is the input signal e1 for the first Control device 114 based on the first Difference-generating device 112 provided Quantity deviation r1 forms.
  • the Control means the second switching means 136 via the second control signal St2 so that the input signal e2 for the second controller 124 based on the the second differencing means 122 provided pressure deviation r2 is formed.
  • the input signals do not become only on the basis of the mentioned, but under additional Consideration of the other deviations r1, r2 educated.
  • the behavior of the rule management device 130 has been described for each stationary control operation in either the first, second or third control mode.
  • the rule management device 130 is designed to open the control circuits involved in a switching process by their control device 114, 124 no longer actuated as before in stationary control operation with the input signal e1 or e2, but instead with special switching input signal u1, u2 become.
  • These switching input signals are designed such that the control devices 114, 124 are transferred in the desired manner from a current operating state defined by the current control mode, active or passive, into a future operating state defined by the future control mode, active or passive.
  • the switching input signals u1, u2 are basically based suitably predetermined by the storage device 132 provided tax values.
  • the control values are for every single possible switching between two individually determined by different control modes.
  • structure of the rule management device 130 become the first and the second switching device 134, 136 then during a switching process by the first and second control signals St1, St2 are controlled so that they the switching signals u1, u2 based on by Memory device 132 provided appropriate Generate tax values.
  • the memory device 132 becomes in turn by the third control signal St3 instructed accordingly.
  • the switching input signals u1, u2 not only from the pure tax values are formed, but if they are formed from tax values instead, which with the current, by the second Differentializer 122 provided Pressure deviation r2 were applied.
  • the switching input signals u1, u2 then more or less strongly of the originally predetermined control values; in this way Not only is the speed of regulation with regard to optimized current pressure situation in fuel storage, but it is also due to the switching process caused pressure deviation kept as low as possible.
  • the controller 138 may be a state machine be formed, which is a monitoring of Operating points of the control device 114, 124 during a Switchover allows.
  • both Control loops 110, 120 open by these no longer with the input signals e1, e2, but instead with the Switching Eihgangssignal u1, u2 are controlled. It Then there is a monitoring of the by the switching input signals u1, u2 conditional shift of Operating points of both control device 114, 124 in particular in terms of when when in this switching process too deactivating control device their previous effective Workspace leaves. When this time reaches is, is in the active regulatory device that previously input switching input signal u1, u2 off. The associated control loop then becomes again closed by the control device - instead of with the Switch input signal - with the selected one predetermined first or second control mode Input signal e1, e2, which one of the said Control deviations represented, is controlled.
  • control device to be deactivated Parallel to this is the control device to be deactivated so long continue with the switching input signal fed until this control device due to the Operating point shift has been deactivated.
  • the control device to be deactivated can also simply shut off.
  • Control device in the effective work area is also the one control device that both in the current and in the future desired control mode is activated and so far with the input signal e1, e2 of the current control mode is cut off from this input signal and instead with the same toggle input signal u1, u2 fed as the regulating device to be activated.
  • Both Control device are then as long as preferably the same switching input signal until both Control devices in such an active operating state have been convicted, as he desired for the future Control mode is provided.
  • Switches from the first to the second control mode or vice versa are preferably not by a direct Switching between these control modes realized.
  • a such direct switching would disadvantageously severe disturbances of the rail pressure during the Switchover result. Therefore, according to the invention proposed a detour in such switching operations via the third control mode. Specifically means this, that at a switching from the first to the second control mode, first a Umschaltvcrgang of the first on the third and subsequently a switching process should be made from the third to the second control mode. Similarly, a switching operation of the second control mode to the first control mode realized by that first from the second to the third and subsequently from the third is switched to the first control mode.
  • the control device 138 is designed to be suitable for each of the said switching operations the Memory device 132 and the first and second Switching means 134, 136 via the control signals St1, St2 suitably controls, in particular the switching input signals u1, u2 to realize in a suitable manner.
  • the described method according to the invention is preferably realized in the form of a computer program.
  • the computer program may together with other computer programs on a computer readable Storage medium to be stored.
  • the disk may be to a floppy disk, a compact disc or a act as flash memory. That on the disk stored computer program can then as a product to transfer or sell to a customer.
  • computer program can also without the help a data carrier via an electronic Communication network, especially the Internet, as Product to the customer.

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  • 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)
  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP04018196A 2003-10-24 2004-07-31 Méthode de régulation de la pression d'un accumulateur de carburant dans un moteur à combustion interne Active EP1526268B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10349628A DE10349628A1 (de) 2003-10-24 2003-10-24 Verfahren zum Regeln des Druckes in einem Kraftstoffspeicher einer Brennkraftmaschine
DE10349628 2003-10-24

Publications (3)

Publication Number Publication Date
EP1526268A2 true EP1526268A2 (fr) 2005-04-27
EP1526268A3 EP1526268A3 (fr) 2011-01-05
EP1526268B1 EP1526268B1 (fr) 2012-12-12

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EP04018196A Active EP1526268B1 (fr) 2003-10-24 2004-07-31 Méthode de régulation de la pression d'un accumulateur de carburant dans un moteur à combustion interne

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US (1) US7040291B2 (fr)
EP (1) EP1526268B1 (fr)
JP (1) JP4621472B2 (fr)
DE (1) DE10349628A1 (fr)

Cited By (1)

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WO2008090033A1 (fr) * 2007-01-24 2008-07-31 Continental Automotive Gmbh Procédé de régulation d'un dispositif d'alimentation en carburant d'un moteur à combustion interne

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DE102007027943B3 (de) * 2007-06-18 2008-10-16 Mtu Friedrichshafen Gmbh Verfahren zur Regelung des Raildrucks während eines Startvorgangs
DE102007058539A1 (de) * 2007-12-06 2009-06-10 Robert Bosch Gmbh Verfahren zum Einstellen eines Kraftstoffdrucks
JP4955601B2 (ja) * 2008-04-08 2012-06-20 ボッシュ株式会社 コモンレール式燃料噴射制御装置における圧力制御電磁弁の駆動方法及びコモンレール式燃料噴射制御装置
US8210156B2 (en) * 2009-07-01 2012-07-03 Ford Global Technologies, Llc Fuel system with electrically-controllable mechanical pressure regulator
DE102009031528B3 (de) * 2009-07-02 2010-11-11 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102009031527B3 (de) * 2009-07-02 2010-11-18 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102009045563B4 (de) * 2009-10-12 2019-06-13 Robert Bosch Gmbh Verfahren zum Bestimmen wenigstens eines Raildruck-Schließstrom-Wertepaares für ein Druckregelventil eines Common-Rail-Einspritzsystems
DE102012209256A1 (de) 2012-06-01 2013-12-05 Robert Bosch Gmbh Kraftstoffeinspritzsystem
DE102013221981A1 (de) * 2013-10-29 2015-04-30 Robert Bosch Gmbh Verfahren zur Steuerung eines Druckregelventils einer Kraftstoffeinspritzanlage insbesondere eines Kraftfahrzeugs
DE102014226565A1 (de) * 2014-12-19 2016-06-23 Robert Bosch Gmbh Verfahren zur Prüfung einer Kraftstofffördereinrichtung, sowie ein Steuergerät und ein Werkstatt-Tester

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WO2003046357A1 (fr) * 2001-11-24 2003-06-05 Mtu Friedrichshafen Gmbh Procede de commande d'un moteur a combustion interne

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WO2003046357A1 (fr) * 2001-11-24 2003-06-05 Mtu Friedrichshafen Gmbh Procede de commande d'un moteur a combustion interne

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Publication number Priority date Publication date Assignee Title
WO2008090033A1 (fr) * 2007-01-24 2008-07-31 Continental Automotive Gmbh Procédé de régulation d'un dispositif d'alimentation en carburant d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE10349628A1 (de) 2005-06-02
US20050087174A1 (en) 2005-04-28
EP1526268B1 (fr) 2012-12-12
EP1526268A3 (fr) 2011-01-05
US7040291B2 (en) 2006-05-09
JP2005127322A (ja) 2005-05-19
JP4621472B2 (ja) 2011-01-26

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