EP1133621B1 - Verfahren zum steuern eines elektromechanischen stellantriebs für ein gaswechselventil einer brennkraftmaschine - Google Patents
Verfahren zum steuern eines elektromechanischen stellantriebs für ein gaswechselventil einer brennkraftmaschine Download PDFInfo
- Publication number
- EP1133621B1 EP1133621B1 EP99964376A EP99964376A EP1133621B1 EP 1133621 B1 EP1133621 B1 EP 1133621B1 EP 99964376 A EP99964376 A EP 99964376A EP 99964376 A EP99964376 A EP 99964376A EP 1133621 B1 EP1133621 B1 EP 1133621B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- disruptive force
- estimated value
- valve
- 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.)
- Expired - Lifetime
Links
Images
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
- F02D41/02—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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
- F02D41/145—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure with determination means using an estimation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2201/00—Electronic control systems; Apparatus or methods therefor
-
- 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
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
Definitions
- the invention relates to a method for controlling an electromechanical Actuator for a gas exchange valve one Internal combustion engine.
- a known internal combustion engine (DE 296 07 963 U1) has at least a gas inlet valve and at least one gas outlet valve per cylinder by an electromechanical actuator are driven.
- the gas outlet valve must depend on the current load state of the internal combustion engine open against a high cylinder pressure. Therefore To do this, high opening forces must be used depending on the current Load state are applied.
- the gas outlet valves are each on the inside of the cylinder side facing away from the valve disk provided with a piston disc in a pressure compensation chamber is led. The pressure compensation space is over a pressure equalization channel in connection with the cylinder interior brought. So the piston disc is in the opening direction of the gas outlet valve with the internal cylinder pressure.
- the object of the invention is a method for control an electromechanical actuator for a gas exchange valve to create an internal combustion engine that is simple and reliable operation of the electromechanical actuator guaranteed.
- the invention is characterized in that the electromechanical Actuator operated with a low power loss can be and still a reliable operation of the Actuator independent of that on the gas exchange valve acting interference is guaranteed, which from the on it acting gas forces results.
- the course of the interference is precisely estimated with a very high temporal resolution. Therefore there is only a small reserve of actuating forces necessary by the electromechanical actuator must be applied.
- An internal combustion engine (FIG. 1) comprises an actuator which acts on a gas exchange valve and which is arranged in a cylinder head 31 of the internal combustion engine.
- the gas exchange valve is designed either as an outlet valve 2 or as an inlet valve 6.
- the gas exchange valve has a shaft 21 and a plate 22.
- the actuator 1 has a housing 11 in which a first and a second electromagnet are arranged.
- the first electromagnet has a first core 12 which is provided with a first coil 13.
- the second electromagnet has a second core 14 which is provided with a second coil 15.
- An armature is provided, the armature plate of which is movably arranged in the housing 11 between a first contact surface 15a of the first electromagnet and a second contact surface 15b of the second electromagnet.
- the anchor plate 16 is thus movable between a closed position s maxS and an open position s maxO .
- the armature further comprises an armature shaft 17 which is guided through recesses in the first and second core 12, 14 and which can be mechanically coupled to the shaft 21 of the exhaust valve 2.
- a first reset means 18a and a second reset means 18b which are preferably designed as springs, bias the anchor plate 16 into the predetermined rest position s 0 .
- a position sensor 19 is preferably provided, which is arranged on or in the actuator 1 in such a way that it indirectly or directly detects the position of the anchor plate 16 and the anchor shaft 17.
- the actuator 1 is with the cylinder head 31 of the internal combustion engine rigidly connected.
- An intake duct 32, an exhaust duct 32a and cylinder 33 with a piston 34 are in the Internal combustion engine provided.
- the piston 34 is over a Connecting rod 35 coupled to a crankshaft 36.
- a control device 4 which the signals from Detects sensors that are designed, for example, as position sensors 19 and / or speed sensor 37 and / or a Load detection sensor 38 and / or an exhaust gas probe 39, which the Proportion of the exhaust gas in the exhaust duct 32a is detected and dependent of which an air ratio is determined and / or a load detection sensor 38, for example as an air mass meter or as Pressure sensor can be formed, and / or a temperature sensor.
- the control device 4 may communicate with a higher-level control device for engine operating functions and receives control signals from it.
- the control device 4 controls depending on the signals from the sensors and the Control signals the first and the second coil 13, 15 of the Actuator 1 on.
- the control device 4 comprises a control unit 41, in which the control signals for the coils 13, 15 are calculated, and a first power amplifier 42 and one second power output stage 43, which amplify the steep signals.
- the control device 4 can also be a structural unit with the higher-level control device for engine operating functions form.
- the disturbing force resulting from the gas forces acting on the gas exchange valve is the difference between the force caused by the internal cylinder pressure, which acts on the plate 22 on its end face 22a, and the force resulting from the exhaust gas pressure, which acts on the rear side 22b of the plate 22 attacks.
- the internal cylinder pressure drops with the exhaust gas flowing out, while the exhaust gas pressure rises first. This results in a high dynamic of the interference force after opening the exhaust valve.
- the time course F G, AV, t of the interference force that results at the gas exchange valve after opening has started can be estimated very precisely by the step response of a transmission element to a jump in the interference force of the value the interference force immediately before opening the gas exchange valve to a predetermined value, which is preferably approximately zero.
- Figure 2 shows a block diagram for controlling the electromechanical Actuator, the essential for the invention Parts are shown.
- the block diagram is preferred stored in the form of a program in the control device 4 and is in the control unit 41 during operation processed the internal combustion engine.
- a first contribution for an estimated value F S, AV of a force which acts on the end face 22a of the valve plate 22 is, based on a variable which characterizes the air mass before combustion in the cylinder 33 of the internal combustion engine, preferably is the air mass flow m ⁇ cyl in the cylinder 33, and the opening angle ⁇ AO of the exhaust valve 2 based on the crankshaft angle.
- the opening angle ⁇ AO is the crankshaft angle at which the armature plate 16 begins to move away from the closed position S maxS toward the open position s maxO .
- a second post is c ⁇ for the estimation value F S, AV of the force which acts on the end side of the plate 22 of the exhaust valve 2 immediately before the opening of the exhaust valve to ⁇ from a characteristic field depending on the difference ⁇ of a predetermined nominal value and ⁇ of an actual value of the Lufiere is determined.
- a third contribution c ⁇ for the estimated value F S, AV of the force which acts on the end face of the plate 22 immediately before the outlet valve 2 is opened is determined in a block B3 from a further characteristic map as a function of the difference ⁇ z of a target value ⁇ z , should and an actual value ⁇ z, the ignition angle is determined.
- the first contribution, the second contribution c ⁇ and the third contribution c ⁇ are multiplicatively linked and thus give the estimated value F S, AV of the force which is applied to the end face of the valve immediately before the opening of the exhaust valve 2 Exhaust valve acts.
- the estimated value F S, AV of the force which acts on the end face of the exhaust valve immediately before the start of opening thereof is thus determined simply as a function of operating variables which are already available in a control device for engine operating functions.
- An estimated value P AG of the exhaust gas pressure is determined in a summing point S1 from the sum of the ambient pressure p 0 and a differential exhaust gas pressure ⁇ AG .
- the ambient pressure p 0 is either detected by an ambient pressure sensor or determined as a function of detected operating variables of the internal combustion engine in predetermined operating states of the internal combustion engine.
- the differential pressure ⁇ AG is determined in a block B4 from a map as a function of the air mass flow m ⁇ cyl ( i -1) , which was determined in the previous cylinder segment , and an exhaust gas temperature t AG .
- a cylinder segment is defined by the crankshaft angle, which is between the top dead centers of the pistons of two cylinders of the internal combustion engine, which are adjacent in the firing order.
- the air mass flow m ⁇ cyl ( i- 1) is the air mass flow that has flowed into the respective cylinder in the preceding cylinder segment .
- the exhaust gas temperature t AG can either be detected by a temperature sensor arranged in the exhaust gas duct 32a or determined depending on other operating variables of the internal combustion engine.
- a pressure sensor can also be arranged in the exhaust gas duct 32a, which detects the exhaust gas pressure P AG directly.
- the estimated value F R, AV of the force which acts on the back of the plate 22 immediately before the outlet valve 2 is opened is calculated by multiplying the exhaust gas pressure p AG by the area A AV, R of the back 22b of the plate 22 ,
- Block B5 comprises a transmission element that models the temporal profile F G, AV, t of the interference force.
- the time course F G, AV, t of the interference force after the start of opening the exhaust valve 2 can be estimated with good accuracy from the step response of a PT 1 transmission element.
- the transmission element in block B5 is subjected to a jump in the interference force from the estimated value F G, AV0 to a predetermined value, preferably approximately zero.
- the predetermined value is preferably chosen so that it corresponds to the pressure drop at the outlet valve 2 in the open and quasi-stationary state of the flow at the outlet valve 2.
- One of the parameters of the PT 1 transmission element is the time constant T 1 . It can either be predefined or, with the advantage of a much higher accuracy in the calculation of the course F G, AV, t of the interference force, is determined in a block B6 from a map depending on the speed N and the start of opening ⁇ AO of the exhaust valve 2 become.
- the dynamics of the gas exchange process is significantly influenced by the point in time at which the exhaust valve 2 is opened within the expansion or extension stroke and the movement speed of the piston which supports or counteracts the passage of the exhaust gas into the exhaust duct 32a. This relationship can simply be stored in a map depending on the speed N and the start of opening ⁇ AO of the exhaust valve.
- the calculation of the estimated value F S, AV of the force which acts immediately before the opening of the exhaust valve on the front side thereof and the estimated value F R, AV of the force which acts immediately before the opening of the exhaust valve on the rear side thereof takes place in the same cylinder segment, ie segment-synchronous, for which the temporal course (F G, AV, t ) of the interference force is calculated, which results from the gas forces acting on the gas exchange valve immediately before the gas exchange valve opens.
- the course of the interference force over time can be determined in block B5, for example in a 100 ⁇ s raster, and can thus be used with a high temporal resolution to calculate the actuating signals for the actuator.
- control unit 41 is a controller or a regulator provided, the reference variable of the current through the first or second coil 13, 15 or the position of the armature plate 16 are and which generate an actuating signal that depends on the The course of the interference force is corrected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
- Figur 1
- eine Anordnung eines Stellantriebs und einer Steuereinrichtung in einer Brennkraftmaschine,
- Figur 2
- ein Blockdiagramm zum Steuern des elektromechanischen Stellantriebs.
Claims (9)
- Verfahren zum Steuern eines elektromechanischen Stellantriebs für ein Gaswechselventil einer Brennkraftmaschine, bei demein Schätzwert (FG,AV,0) einer Störkraft berechnet wird, die resultiert aus den unmittelbar vor dem Öffnen des Gaswechselventils auf das Gaswechselventil einwirkenden Gaskräften,der zeitliche Verlauf (FG,AV,t) der Störkraft, die an dem Gaswechselventil nach dem Beginn des Öffnens resultiert, geschätzt wird aus der Sprungantwort eines Übertragungsglieds, das den zeitlichen Verlauf (FG,AV,t) der Störkraft modelliert, auf einen Sprung der Störkraft von dem Schätzwert (FG,AV,0) auf einen vorgegebenen Wert, wobei die Ausgangsgröße des Übertragungsglieds die Störkraft repräsentiert, undein Stellsignal für den Stellantrieb abhängig von dem zeitlichen Verlauf der Störkraft ermittelt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Gaswechselventil ein Auslaßventil ist.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Schätzwert (FG,AV,0) der Störkraft abhängig von einer den Beginn des Öffnens des Auslaßventils und einer die Luftmasse vor der Verbrennung in einem Zylinder der Brennkraftmaschine charakterisierenden Größe berechnet wird.
- Verfahren nach einem der Ansprüche 2 bis 3, dadurch gekennzeichnet, daß der Schätzwert (FG,AV,0) der Störkraft abhängig von der Luftzahl berechnet wird.
- Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Schätzwert (FG,AV,0) der Störkraft abhängig von dem Zündwinkel berechnet wird.
- Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Schätzwert (FG,AV,0) der Störkraft abhängig von einer den Abgasdruck in dem Abgastrakt der Brennkraftmaschine vor dem Beginn des Öffnens des Auslaßventils charakterisierenden Größe berechnet wird.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Parameter des Stellglieds abhängig von mindestens einer Betriebsgröße der Brennkraftmaschine ermittelt wird.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß die Betriebsgröße die Drehzahl (N) und/oder die den Beginn des Öffnens des Auslaßventils charakterisierende Größe ist.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß Übertragungsglied ein PT1-Glied ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19854627 | 1998-11-26 | ||
DE19854627 | 1998-11-26 | ||
PCT/DE1999/003731 WO2000031384A1 (de) | 1998-11-26 | 1999-11-24 | Verfahren zum steuern eines elektromechanischen stellantriebs für ein gaswechselventil einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1133621A1 EP1133621A1 (de) | 2001-09-19 |
EP1133621B1 true EP1133621B1 (de) | 2002-09-18 |
Family
ID=7889136
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99964376A Expired - Lifetime EP1133621B1 (de) | 1998-11-26 | 1999-11-24 | Verfahren zum steuern eines elektromechanischen stellantriebs für ein gaswechselventil einer brennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US6371064B2 (de) |
EP (1) | EP1133621B1 (de) |
JP (1) | JP2002530582A (de) |
DE (1) | DE59902798D1 (de) |
WO (1) | WO2000031384A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITBO20010390A1 (it) * | 2001-06-19 | 2002-12-19 | Magneti Marelli Spa | Metodo di controllo di un attuatore elettromagnetico per il comando di una valvola di un motore a partire da una condizione di battuta |
JP3927043B2 (ja) * | 2002-02-13 | 2007-06-06 | 株式会社山武 | フィードバック機構およびバルブポジショナ |
DE10358523A1 (de) * | 2003-04-04 | 2004-10-28 | Bayerische Motoren Werke Ag | Vorrichtung zur Simulierung von Gaskräften in einem Verbrennungsmotor |
US7314026B2 (en) * | 2004-01-21 | 2008-01-01 | Ford Global Technologies, Llc | Electronic valve actuator having hydraulic displacement amplifier |
US7089895B2 (en) * | 2005-01-13 | 2006-08-15 | Motorola, Inc. | Valve operation in an internal combustion engine |
JP2007095613A (ja) * | 2005-09-30 | 2007-04-12 | Seiko Epson Corp | 有機エレクトロルミネッセンス装置および電子機器 |
JP2007303418A (ja) * | 2006-05-12 | 2007-11-22 | Toyota Motor Corp | 電磁駆動弁 |
US7866286B2 (en) * | 2006-09-13 | 2011-01-11 | Gm Global Technology Operations, Inc. | Method for valve seating control for an electro-hydraulic engine valve |
US7549438B2 (en) * | 2006-11-03 | 2009-06-23 | Gm Global Technology Operations, Inc. | Valve heated by split solenoid |
US10340049B2 (en) | 2016-08-04 | 2019-07-02 | Savannah River Nuclear Solutions, Llc | Alpha/beta radiation shielding materials |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3671508B2 (ja) * | 1996-03-25 | 2005-07-13 | トヨタ自動車株式会社 | 内燃機関および内燃機関のヘッド構造 |
DE29607963U1 (de) | 1996-05-02 | 1996-11-14 | Fev Motorentech Gmbh & Co Kg | Kolbenbrennkraftmaschine mit druckentlastbaren Gasauslaßventilen |
DE19733137A1 (de) * | 1997-07-31 | 1999-02-04 | Fev Motorentech Gmbh & Co Kg | Verfahren zur Steuerung von elektromagnetischen Aktuatoren zur Betätigung von Gaswechselventilen an Kolbenbrennkraftmaschinen |
JPH11280432A (ja) * | 1998-03-27 | 1999-10-12 | Toyota Motor Corp | 電磁弁の制御装置 |
-
1999
- 1999-11-24 WO PCT/DE1999/003731 patent/WO2000031384A1/de active IP Right Grant
- 1999-11-24 EP EP99964376A patent/EP1133621B1/de not_active Expired - Lifetime
- 1999-11-24 JP JP2000584175A patent/JP2002530582A/ja active Pending
- 1999-11-24 DE DE59902798T patent/DE59902798D1/de not_active Expired - Fee Related
-
2001
- 2001-05-29 US US09/867,252 patent/US6371064B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2000031384A1 (de) | 2000-06-02 |
DE59902798D1 (de) | 2002-10-24 |
US6371064B2 (en) | 2002-04-16 |
US20010054400A1 (en) | 2001-12-27 |
EP1133621A1 (de) | 2001-09-19 |
JP2002530582A (ja) | 2002-09-17 |
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