DE102005029063A1 - Reciprocating internal combustion engine e.g. otto-gas engine, has bypass line connected to main line system in flow direction before and after compressor of turbo charger, where cross section of bypass line is opened and closed - Google Patents

Reciprocating internal combustion engine e.g. otto-gas engine, has bypass line connected to main line system in flow direction before and after compressor of turbo charger, where cross section of bypass line is opened and closed Download PDF

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Publication number
DE102005029063A1
DE102005029063A1 DE102005029063A DE102005029063A DE102005029063A1 DE 102005029063 A1 DE102005029063 A1 DE 102005029063A1 DE 102005029063 A DE102005029063 A DE 102005029063A DE 102005029063 A DE102005029063 A DE 102005029063A DE 102005029063 A1 DE102005029063 A1 DE 102005029063A1
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Prior art keywords
bypass line
internal combustion
combustion engine
reciprocating internal
compressor
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DE102005029063A
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German (de)
Inventor
Karl Stellwagen
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Caterpillar Energy Solutions GmbH
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Deutz AG
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Priority to DE102005029063A priority Critical patent/DE102005029063A1/en
Publication of DE102005029063A1 publication Critical patent/DE102005029063A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0418—Layout of the intake air cooling or coolant circuit the intake air cooler having a bypass or multiple flow paths within the heat exchanger to vary the effective heat transfer surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/04—Gas-air mixing apparatus
    • F02M21/047—Venturi mixer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Supercharger (AREA)

Abstract

The engine has a bypass line (8) connected to a main line system (1) in flow direction before and after a compressor of a turbo charger (4), where the cross section of the bypass line is opened and closed. The bypass line is connected before the compressor and before a throttle valve (6) that is attached to the compressor. The bypass line is connected before an intercooler that is connected upstream of the throttle valve.

Description

Die Erfindung bezieht sich auf eine Hubkolbenbrennkraftmaschine, insbesondere Otto-Gasmotor, dem ein Luft-Gas-Gemisch unter Zuhilfenahme zumindest eines Gas-Mischers, eines Laders, insbesondere Turboladers, vorzugsweise eines Ladeluftkühlers und zumindest einer Drosselklappe durch ein Hauptleitungssystem zuführbar ist.The The invention relates to a reciprocating internal combustion engine, in particular Otto gas engine, which is an air-gas mixture with the help of at least a gas mixer, a supercharger, in particular turbocharger, preferably a charge air cooler and at least one throttle through a main conduit system supplied is.

Bei derartigen Hubkolbenbrennkraftmaschinen, insbesondere Otto-Gasmotoren, mit hocheffizienten Turboladern ist das Betriebskennfeld des Verdichters stark eingeschränkt. Durch Änderungen der Umgebungsbedingungen und der Kraftstoff- insbesondere Gas-Qualität kann sich die Betriebslinie des Verdichters verschieben. Hierbei ist es besonders kritisch, wenn diese in Richtung Pumpgrenze wandert. Dabei können Betriebsstörungen der Anlage, in Ausnahmefällen sogar Verdichter-, insbesondere Turboladerschäden entstehen.at Such reciprocating internal combustion engines, in particular Otto gas engines, with highly efficient Turbochargers, the operating map of the compressor is severely limited. By changes Environmental conditions and fuel-gas quality in particular may vary move the operating line of the compressor. This is special critical if it moves towards the surge line. This can cause malfunction of the Plant, in exceptional cases even compressor, especially turbocharger damage arise.

Aufgabe der Erfindung ist es, eine gattungsgemäße Hubkolbenbrennkraftmaschine dahingehend zu verbessern, dass eine Anpassung des Verdichters an Umgebungsbedingungen und Kraftstoffqualitäten erfolgen kann. Dabei soll darüber hinaus eine feinfühlige Anpassung, insbesondere auch eine Anpassung an verschiedene Ansaugtemperaturen möglich sein, wobei dies mit einfachen Mitteln erfolgen soll.task The invention is a generic reciprocating internal combustion engine to improve that adaptation of the compressor to Ambient conditions and fuel qualities can be done. It should about that Beyond a sensitive Adaptation, in particular also adaptation to different intake temperatures, be possible this should be done by simple means.

Die Aufgabe der Erfindung wird dadurch gelöst, dass in Strömungsrichtung vor und nach dem Verdichter an das Hauptleitungssystem eine Bypassleitung angeschlossen ist, deren Querschnitt geöffnet und verschlossen werden kann. Dadurch ist es möglich, kritische Betriebszustände des Verdichters, zum Beispiel Erreichen der Pumpgrenze, dadurch zu vermeiden, dass der Querschnitt in der Bypassleitung geöffnet wird. Dadurch kann auch eine Anpassung an die Kraftstoff-, insbesondere Gasqualität erfolgen.The The object of the invention is achieved in that in the flow direction before and after the compressor to the main line system a bypass line is connected, the cross section are opened and closed can. This makes it possible critical operating conditions of the compressor, for example reaching the surge line, by to avoid that the cross section in the bypass line is opened. This can also be an adaptation to the fuel, in particular gas quality respectively.

In vorteilhafter Ausgestaltung der Erfindung wird die Bypassleitung vor dem Verdichter und vor der dem Verdichter nachgeschalteten Drosselklappe angeschlossen. Dadurch kann ein erhöhter Druck vor der Drosselklappe über die geöffnete Bypassleitung ausgeschlossen werden.In Advantageous embodiment of the invention, the bypass line connected in front of the compressor and upstream of the throttle downstream of the compressor. This can be an elevated Pressure in front of the throttle valve over the open one Bypass line be excluded.

Die Bypassleitung ist dabei vor der Drosselklappe und hinter zumindest einem vorzugsweise vorgesehenen Ladeluftkühler angeschlossen, der der Drosselklappe vorgeschaltet ist. In diesem Zusammenhang sei noch einmal daran erinnert, dass die Begriffe vor und hinter einem Bauteil immer in Strömungsrichtung zu verstehen sind.The Bypass line is in front of the throttle and behind at least a preferably provided intercooler connected to the Throttle valve is connected upstream. In this context is still once reminded that the concepts in front of and behind a component always in the flow direction to be understood.

Um eine noch bessere Anpassung zu erreichen wird vorgeschlagen, dass in die Bypassleitung ein Druckregelgerät eingebaut ist. Durch dieses Druckregelgerät kann in Abhängigkeit des Drucks vor der Drosselklappe eine geregelte Abströmung über die Bypassleitung erfolgen.Around To achieve an even better adaptation it is suggested that in the bypass line a pressure regulator is installed. Through this pressure regulator can in dependence the pressure in front of the throttle valve a regulated outflow over the Bypass line done.

Das Druckregelgerät weist in vorteilhafter Weise eine Ventileinheit auf, mit der eine Membrane in Wirkverbindung steht, die auf ihrer der Ventileinheit abgewandten Seite von einer einstellbaren Sollwertfeder belastet ist. Auf dieser Seite der Membrane ist weiterhin eine Wirkdruckleitung angeschlossen, die an das Hauptleitungssystem hinter der Drosselklappe angeschlossen ist und damit den Druck oder Unterdruck an dieser Stelle in das Druckregelgerät einbringt. Durch diese Ausgestaltung wird der Differenzdruck vor und hinter der Dros selklappe in Verbindung mit der Sollwertfeder genutzt, um den Querschnitt der Bypassleitung zu verstellen. Es handelt sich dabei grundsätzlich um eine einfache Einrichtung, durch die ohne elektronische Regeleinheiten, Sensoren usw. eine zuverlässige Regelung des Querschnitts der Bypassleitung erreicht wird.The Pressure Regulator Advantageously, a valve unit, with a Diaphragm is in operative connection facing away from the valve unit Side is loaded by an adjustable setpoint spring. On this Side of the membrane is still connected to a differential pressure line, which is connected to the main system behind the throttle is and thus the pressure or negative pressure at this point in the Pressure regulator brings. By this configuration, the differential pressure is present and behind the Dros selklappe in conjunction with the setpoint spring used to adjust the cross section of the bypass line. It is basically to a simple device through which without electronic control units, Sensors, etc. a reliable Control of the cross section of the bypass line is achieved.

Je nach Motorgröße können in der Bypassleitung mehrere Druckregelgeräte in Parallelschaltung eingebaut sein, um einen genügend großen Steuerquerschnitt zur Verfügung stellen zu können. Dabei ist natürlich an jedes Druckregelgerät auch die Wirkdruckleitung oder je eine Wirkdruckleitung angeschlossen. Die Druckregelgeräte können dabei, z. B. durch Verstellen der Sollwertfeder, so eingestellt sein, dass sie nicht gleichzeitig sondern nacheinander, z. B. in Stufen ansprechen.ever according to engine size can be in the bypass line several pressure regulators installed in parallel be enough to one large control cross section to disposal to be able to make. there is natural to every pressure regulator also connected to the differential pressure line or a differential pressure line. The pressure regulators can thereby, z. B. adjusted by adjusting the setpoint spring, so that they are not simultaneously but in succession, z. B. in stages speak to.

In die Wirkdruckleitung oder -leitungen ist in vorteilhafter Weise eine Drossel, vorzugsweise eine Verstelldrossel eingebaut, um das Regelverhalten des Druckregelgerätes anpassen zu können bzw. zu vergleichmäßigen oder zu glätten.In the differential pressure line or lines is in an advantageous manner a throttle, preferably a variable throttle installed to the Control behavior of the pressure regulator to be able to adapt or to uniform or to smooth.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung verwiesen, in der ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist.to further explanation The invention is directed to the drawing, in which an embodiment the invention is shown simplified.

Die einzige Figur zeigt eine skizzierte Darstellung des Hauptleitungssystems mit Bypassleitung und einem Druckregelgerät.The single figure shows a sketched representation of the main line system with bypass line and a pressure regulator.

In der Figur ist mit 1 ein Hauptleitungssystem bezeichnet, in dem in Strömungsrichtung gesehen ein Luftfilter 2, ein Gasmischer 3, ein oder mehrere Turbolader 4, ein oder mehrere Ladeluftkühler 5 und eine Drosselklappe 6 in der beschriebenen Reihenfolge eingebaut sind. Das Hauptleitungssystem 1 führt dann weiter zu einem mit 7 bezeichneten Otto-Gasmotor, der, wie üblich, mit einem Kurbelgehäuse, einer Kurbelwelle und einem Zylinderkopf ausgestattet ist, wobei an der Kurbelwelle über Pleuel Kolben angelenkt sind, die mit Gaswechselventilen in Wirkverbindung stehen, wobei das Hauptleitungssystem 1 den Einlassventilen zugeordnet ist.In the figure is with 1 denotes a main piping system, in which seen in the flow direction an air filter 2 , a gas mixer 3 , one or more turbochargers 4 , one or more intercoolers 5 and a throttle 6 are installed in the order described. The main system 1 then leads on to one 7 designated Otto gas engine, which, as usual, is equipped with a crankcase, a crankshaft and a cylinder head, wherein on the crankshaft via connecting rods are articulated pistons, which are in operative connection with gas exchange valves, the main line system 1 associated with the intake valves.

Vor dem oder den Verdichter(n) des oder der Turbolader 4 und vor der oder den Drosselklappe(n) 6 ist eine mit 8 bezeichnete Bypassleitung angeschlossen, in der ein Druckregelgerät 9 eingebaut ist. Die Bypassleitung 8 hat weitere Anschlüsse, an die ein oder mehrere weitere Druckregelgeräte in Parallelschaltung angeschlossen werden können.Before the compressor (s) of the turbocharger (s) 4 and in front of the throttle valve (s) 6 is one with 8th designated bypass line connected in a pressure regulator 9 is installed. The bypass line 8th has additional connections to which one or more additional pressure regulators can be connected in parallel.

Das Druckregelgerät 9 weist eine Ventileinheit 10 auf, die den Querschnitt durch die Bypassleitung steuert. An die Ventileinheit 10 ist eine Membrane 11 angeschlossen, die die Ventileinheit 10 und die Bypassleitung 8 abschließt. Auf der der Ventileinheit 10 abgewandten Seite der Membrane 11 ist ein Steuerdom 12 vorgesehen, in dem eine Sollwertfeder 13 eingebaut ist, deren der Membrane 11 abgewandtes Lager verstellbar ist, so dass die auf die Membrane 11 wirkende Federkraft variiert werden kann.The pressure regulator 9 has a valve unit 10 on, which controls the cross section through the bypass line. To the valve unit 10 is a membrane 11 connected to the valve unit 10 and the bypass line 8th concludes. On the valve unit 10 opposite side of the membrane 11 is a tax dome 12 provided in which a setpoint spring 13 is installed, whose the diaphragm 11 the opposite bearing is adjustable, so that the on the diaphragm 11 acting spring force can be varied.

An den Steuerdom 12 ist eine mit 14 bezeichnete Wirkdruckleitung angeschlossen, die zum Hauptleitungssystem 1 hinter der Drosselklappe 6 führt, so dass unterhalb der Membrane 11 im Bereich der Ventileinheit 10 der Druck in dem Hauptleitungssystem 1 vor der Drosselklappe 6 wirkt und im Steuerdom 12, abgesehen von der Sollwertfeder 13, der Druck in dem Hauptleitungssystem 1 hinter der Drosselklappe. In der Wirkdruckleitung 14 ist noch eine Drossel 15 eingebaut, um die Druckwirkung in der Wirkdruckleitung auf die Membrane 11 anzupassen. In der Bypassleitung 8 nahe der Drosselklappe 6 und in der Wirkdruckleitung 14 sind Plus- und Minuszeichen eingetragen, um den vorwiegend herrschenden Über- bzw. Unterdruck anzudeuten.To the control dome 12 is one with 14 designated impulse line connected to the main line system 1 behind the throttle 6 leads, so that below the membrane 11 in the area of the valve unit 10 the pressure in the main pipe system 1 in front of the throttle 6 works and in the control dome 12 , except for the setpoint spring 13 , the pressure in the main system 1 behind the throttle. In the differential pressure line 14 is still a throttle 15 built-in to the pressure effect in the differential pressure line on the membrane 11 adapt. In the bypass line 8th near the throttle 6 and in the differential pressure line 14 are plus and minus signs registered to indicate the prevailing overpressure or underpressure.

11
HauptleitungssystemMain line system
22
Luftfilterair filter
33
Gas-MischerGas Mixer
44
Turboladerturbocharger
55
LadeluftkühlerIntercooler
66
Drosselklappethrottle
77
Otto-GasmotorOtto gas engine
88th
Bypassleitungbypass line
99
DruckregelgerätPressure Regulator
1010
Ventileinheitvalve unit
1111
Membranemembrane
1212
SteuerdomSteuerdom
1313
SollwertfederSetpoint spring
1414
WirkdruckleitungImpulse line
1515
Drosselthrottle

Claims (8)

Hubkolbenbrennkraftmaschine, insbesondere Otto-Gasmotor (7), dem ein Luft-Gas-Gemisch unter Zuhilfenahme zumindest eines Gas-Mischers (3), zumindest eines Laders, insbesondere Turboladers (4), vorzugsweise zumindest eines Ladeluftkühlers (5) und zumindest einer Drosselklappe (6) durch ein Hauptleitungssystem (1) zuführbar ist, dadurch gekennzeichnet, dass in Strömungsrichtung vor und nach dem Verdichter des Turboladers (4) an das Hauptleitungssystem (1) eine Bypassleitung (8) angeschlossen ist, deren Querschnitt zu öffnen und zu verschließen ist.Reciprocating internal combustion engine, in particular Otto gas engine ( 7 ), the an air-gas mixture with the aid of at least one gas mixer ( 3 ), at least one supercharger, in particular turbocharger ( 4 ), preferably at least one intercooler ( 5 ) and at least one throttle valve ( 6 ) through a main system ( 1 ) can be supplied, characterized in that in the flow direction before and after the compressor of the turbocharger ( 4 ) to the main line system ( 1 ) a bypass line ( 8th ) is connected, the cross section is to open and close. Hubkolbenbrennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Bypassleitung (8) vor dem Verdichter des Turboladers (4) und vor der dem Verdichter nachgeschalteten Drosselklappe (6) angeschlossen ist.Reciprocating internal combustion engine according to claim 1, characterized in that the bypass line ( 8th ) in front of the compressor of the turbocharger ( 4 ) and before the throttle downstream of the compressor ( 6 ) connected. Hubkolbenbrennkraftmaschine nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Bypassleitung (8) hinter dem oder den Ladeluftkühler(n) (5), der der Drosselklappe (6) vorgeschaltet ist, angeschlossen ist.Reciprocating internal combustion engine according to one of claims 1 or 2, characterized in that the bypass line ( 8th ) behind the charge air cooler or radiators (s) ( 5 ), the throttle ( 6 ) is connected upstream, is connected. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in die Bypassleitung (8) ein Druckregelgerät (9) eingebaut ist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that in the bypass line ( 8th ) a pressure regulator ( 9 ) is installed. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Druckregelgerät (9) eine Ventileinheit (10) aufweist, mit der eine Membrane (11) in Wirkverbindung steht, die auf ihrer, der Ventileinheit (10) abgewandten Seite von einer einstellbaren Sollwertfeder (13) belastet und vom Druck oder Unterdruck einer Wirkdruckleitung (14) belastbar ist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that the pressure regulator ( 9 ) a valve unit ( 10 ), with which a membrane ( 11 ) is in operative connection on its, the valve unit ( 10 ) facing away from an adjustable setpoint spring ( 13 ) and the pressure or negative pressure of a differential pressure line ( 14 ) is resilient. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wirkdruckleitung (14) an das Hauptleitungssystem (1) hinter der Drosselklappe (6) angeschlossen ist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that the differential pressure line ( 14 ) to the main line system ( 1 ) behind the throttle ( 6 ) connected. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Wirkdruckleitung (14) eine Drossel (15), vorzugsweise Verstelldrossel, eingebaut ist.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that in the differential pressure line ( 14 ) a throttle ( 15 ), preferably variable throttle, is installed. Hubkolbenbrennkraftmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in der Bypassleitung (8) mehrere Druckregelgeräte (9) in Parallelschaltung angeordnet sind.Reciprocating internal combustion engine according to one of the preceding claims, characterized in that in the bypass line ( 8th ) several pressure regulators ( 9 ) are arranged in parallel.
DE102005029063A 2005-06-23 2005-06-23 Reciprocating internal combustion engine e.g. otto-gas engine, has bypass line connected to main line system in flow direction before and after compressor of turbo charger, where cross section of bypass line is opened and closed Withdrawn DE102005029063A1 (en)

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DE102011105917A1 (en) * 2011-06-21 2012-12-27 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Compressor device for the turbocharger of a piston engine, in particular for use in a motor vehicle, and method for its operation
EP3008324A4 (en) * 2013-06-13 2017-03-15 Dayco IP Holdings, LLC Surge underboost pneumatic compressor recirculation valve system

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EP3008324A4 (en) * 2013-06-13 2017-03-15 Dayco IP Holdings, LLC Surge underboost pneumatic compressor recirculation valve system

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