EP1544450A2 - Exhaust gas recirculation control having mechanical temperature control - Google Patents

Exhaust gas recirculation control having mechanical temperature control Download PDF

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Publication number
EP1544450A2
EP1544450A2 EP04025856A EP04025856A EP1544450A2 EP 1544450 A2 EP1544450 A2 EP 1544450A2 EP 04025856 A EP04025856 A EP 04025856A EP 04025856 A EP04025856 A EP 04025856A EP 1544450 A2 EP1544450 A2 EP 1544450A2
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EP
European Patent Office
Prior art keywords
exhaust
exhaust gas
internal combustion
combustion engine
gas recirculation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04025856A
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German (de)
French (fr)
Other versions
EP1544450A3 (en
Inventor
Karl Lutter
Jürgen Lampe
Heinz Georg Först
Eckhard Haas
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Deutz AG
Original Assignee
Deutz AG
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Filing date
Publication date
Application filed by Deutz AG filed Critical Deutz AG
Publication of EP1544450A2 publication Critical patent/EP1544450A2/en
Publication of EP1544450A3 publication Critical patent/EP1544450A3/en
Withdrawn legal-status Critical Current

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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
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/31—Air-cooled heat exchangers
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
    • 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
    • F02D41/1446—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 exhaust temperatures
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/004—EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal

Definitions

  • the invention relates to an internal combustion engine with a suction line for supplying the intake air to the individual combustion chambers, with an exhaust pipe for removing the exhaust gases from the combustion chambers and with a connecting the suction pipe and the exhaust pipe Exhaust gas recirculation line, wherein in the exhaust pipe a the Return of exhaust gas through the exhaust gas recirculation line controlling Temperature sensor is arranged.
  • Such an internal combustion engine is known from DE 199 12 317 C2.
  • a central electronic control device provided in addition to the temperature the amount of fresh air supplied, the temperature of the recirculated Exhaust gas also the temperature of the total supplied Mixture quantity determined.
  • Such exhaust gas recirculation control is also referred to as EGR regulation.
  • the invention is based on the object, an internal combustion engine with an EGR control according to the preamble of claim 1 create that without electronic control device, without control motors and manages without electrical measuring sensors.
  • the temperature sensor is a mechanical thermocouple whose temperature-dependent deflection is an exhaust flap mechanically controls is an EGR control without electronic control device, without control motors and without electrical measuring sensors created.
  • This EGR regulation is based solely on the Controlled variable exhaust gas temperature, which however is directly load-dependent.
  • Such EGR control according to the invention is in particular for such internal combustion engines interesting, which does not have electronic Have engine governor, but where the injection pump of a mechanical regulator is controlled.
  • thermocouple in the exhaust pipe is in Flow direction before the exhaust gas removal of the exhaust gas recirculation line arranged.
  • the exhaust valve arranged in the exhaust gas recirculation line, preferably before Entry into the intake line.
  • the exhaust valve in the exhaust pipe in the flow direction behind the branch arranged the exhaust gas recirculation line. This leaves the exhaust gas recirculation line always connected to the suction line. Will through Close the exhaust flap, the exhaust back pressure in the exhaust pipe increases, more exhaust gas is returned to the intake manifold accordingly.
  • thermocouple is a bimetallic spring or a Memory spring.
  • the internal combustion engine is a self-igniting Internal combustion engine.
  • Figure 1 shows a section of an internal combustion engine 1. Im Only the parts relevant to the invention will be described below.
  • the intake air passes via an intake passage 2 via not shown here Gas exchange valves in the individual combustion chambers 3 of the internal combustion engine 1.
  • the intake pipe 2 adjacent is an exhaust pipe 4 provided, via which the exhaust gases from the combustion chambers. 3 are also removed via not shown gas exchange valves.
  • an exhaust valve 7 is arranged, with the Passage cross section of the exhaust gas recirculation line 5 is adjustable.
  • thermocouple 6 As a temperature sensor.
  • the thermocouple 6 is here in the exhaust pipe 4 in the flow direction before the exhaust gas removal 8 the exhaust gas recirculation line 5 is arranged.
  • a thermocouple 6 comes preferably a bimetallic spring or a memory spring in question.
  • to Control of the exhaust valve 7 is the temperature-dependent mechanical Deflection of the thermocouple 6 with the exhaust valve 7 so connected to the exhaust flap 7 by the deflection of the Thermocouple 6 is controlled or controlled.
  • FIG. 2 shows an alternative embodiment of an EGR control, in an exhaust flap 7 in the flow direction behind the exhaust gas removal 8 of the exhaust gas recirculation line 5 is arranged.
  • the intake air passes via an intake passage 2 via not shown here Gas exchange valves in the individual combustion chambers 3 of the internal combustion engine 1.
  • the intake pipe 2 adjacent is an exhaust pipe 4 provided, via which the exhaust gases from the combustion chambers. 3 are also removed via not shown gas exchange valves.
  • the exhaust gas recirculation line 5 always remains connected to the intake passage 2 with its full passage cross-section. Is by closing the exhaust valve 7, the exhaust back pressure increases in the exhaust pipe 4, is correspondingly more Exhaust gas returned to the intake.
  • thermocouple is preferably a bimetallic spring or a memory spring.
  • Exhaust flap 7 may be known for engine braking devices exhaust flap be used.
  • the internal combustion engine 1 is preferably a self-igniting internal combustion engine (Diesel engine), especially for use as stationary Motor, preferably for driving a generator for generating electricity.
  • Diesel engine a self-igniting internal combustion engine
  • the internal combustion engine is air-cooled and has an injection system on, which has a mechanical regulator for controlling the Injection has.
  • Figure 3 shows an exhaust gas recirculation line 5 made of gray cast iron with a Inner 9 and outer ribbing 10 in plan view and longitudinal and cross section.
  • the outer ribbing 10 is in this embodiment of itself in the radial direction of the exhaust gas recirculation line 5 extending and on the outer circumference circumferential rib rings 11.
  • the individual Rib rings 11 are arranged one behind the other with the same distance.
  • the inner ribbing 9 consists of one behind the other in the longitudinal direction arranged rib rings 12. These rib rings 12 are each from individual in the longitudinal direction and radially inward extending ribs 14. The size of these ribs 14, i. their Length in the longitudinal direction is the same for all ribs.
  • the ribs 14a of a rib ring 12a offset to the ribs 14b of its adjacent rib ring 12b arranged. This offset is half the distance between two adjacent ribs 14 of a rib ring 12th
  • Each rib ring 12 preferably consists of ten to twenty-two at the same distance on the inner circumference arranged ribs 14th In this preferred embodiment in FIG. 3, each one exists Rib ring 12 of sixteen at the same distance on the inner circumference arranged ribs 14th
  • the reference numeral 13 denotes a connecting flange, which - as shown - as a screw or even for example can be designed as a plug-in flange.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A suction pipe (2) feeds intake air to individual combustion chambers (3). An exhaust pipe (4) carries exhaust gases away from the combustion chambers. An exhaust gas re-circulation pipe (EGRCP) (5) links to the suction pipe and the exhaust pipe. A temperature sensor fits in the exhaust pipe with its temperature value used for controlling exhaust gases re-circulated through the EGRCP.

Description

Die Erfindung betrifft eine Brennkraftmaschine mit einer Ansaugleitung zur Zuführung der Ansaugluft zu den einzelnen Brennräumen, mit einer Abgasleitung zur Abführung der Abgase aus den Brennräumen und mit einer die Ansaugleitung und die Abgasleitung verbindenden Abgasrückführleitung, wobei in der Abgasleitung ein die Rückführung von Abgas durch die Abgasrückführleitung steuernder Temperatursensor angeordnet ist.The invention relates to an internal combustion engine with a suction line for supplying the intake air to the individual combustion chambers, with an exhaust pipe for removing the exhaust gases from the combustion chambers and with a connecting the suction pipe and the exhaust pipe Exhaust gas recirculation line, wherein in the exhaust pipe a the Return of exhaust gas through the exhaust gas recirculation line controlling Temperature sensor is arranged.

Eine derartige Brennkraftmaschine ist aus der DE 199 12 317 C2 bekannt. Zur Steuerung eines Abgasrückführventils ist hier eine zentrale elektronische Steuereinrichtung vorgesehen, die neben der Temperatur der zugeführten Frischluftmenge, der Temperatur der rückgeführten Abgasmenge auch die Temperatur der insgesamt zugeführten Gemischmenge ermittelt. Eine derartige Abgasrückführregelung wird auch als AGR-Regelung bezeichnet.Such an internal combustion engine is known from DE 199 12 317 C2. To control an exhaust gas recirculation valve is here a central electronic control device provided in addition to the temperature the amount of fresh air supplied, the temperature of the recirculated Exhaust gas also the temperature of the total supplied Mixture quantity determined. Such exhaust gas recirculation control is also referred to as EGR regulation.

Nachteilig hieran ist, dass unter anderem immer eine elektronische Steuereinrichtung erforderlich ist.The disadvantage of this is that among other things always an electronic Control device is required.

Der Erfindung liegt die Aufgabe zu Grunde, eine Brennkraftmaschine mit einer AGR-Regelung nach dem Oberbegriff des Anspruchs 1 zu schaffen, die ohne elektronische Steuereinrichtung, ohne Steuermotoren und ohne elektrische Messsensoren auskommt.The invention is based on the object, an internal combustion engine with an EGR control according to the preamble of claim 1 create that without electronic control device, without control motors and manages without electrical measuring sensors.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. According to the invention, this object is achieved by the features of the claim 1 solved.

Dadurch, dass der Temperatursensor ein mechanisches Thermoelement ist, dessen temperaturabhängige Auslenkung eine Abgasklappe mechanisch steuert, ist eine AGR-Regelung ohne elektronische Steuereinrichtung, ohne Steuermotoren und ohne elektrische Messsensoren geschaffen. Diese AGR-Regelung basiert einzig allein auf der Regelgröße Abgastemperatur, die jedoch direkt lastabhängig ist.Because the temperature sensor is a mechanical thermocouple whose temperature-dependent deflection is an exhaust flap mechanically controls is an EGR control without electronic control device, without control motors and without electrical measuring sensors created. This EGR regulation is based solely on the Controlled variable exhaust gas temperature, which however is directly load-dependent.

Eine derartige erfindungsgemäße AGR-Regelung ist insbesondere für solche Brennkraftmaschinen interessant, die keinen elektronischen Motorregler haben, sondern bei denen die Einspritzpumpe von einem mechanischen Regler gesteuert wird.Such EGR control according to the invention is in particular for such internal combustion engines interesting, which does not have electronic Have engine governor, but where the injection pump of a mechanical regulator is controlled.

Erfindungsgemäß ist das Thermoelement in der Abgasleitung in Strömungsrichtung vor der Abgasentnahme der Abgasrückführleitung angeordnet.According to the invention, the thermocouple in the exhaust pipe is in Flow direction before the exhaust gas removal of the exhaust gas recirculation line arranged.

In einer ersten erfindungsgemäßen Ausgestaltung ist die Abgasklappe in der Abgasrückführleitung angeordnet, bevorzugt vor dem Eintritt in die Ansaugleitung.In a first embodiment of the invention, the exhaust valve arranged in the exhaust gas recirculation line, preferably before Entry into the intake line.

In einer zweiten erfindungsgemäßen Ausgestaltung ist die Abgasklappe in der Abgasleitung in Strömungsrichtung hinter der Abzweigung der Abgasrückführleitung angeordnet. Hierbei bleibt die Abgasrückführleitung immer mit der Ansaugleitung verbunden. Wird durch Schließen der Abgasklappe der Abgasgegendruck in der Abgasleitung erhöht, wird entsprechend mehr Abgas in die Ansaugleitung zurückgeführt.In a second embodiment of the invention, the exhaust valve in the exhaust pipe in the flow direction behind the branch arranged the exhaust gas recirculation line. This leaves the exhaust gas recirculation line always connected to the suction line. Will through Close the exhaust flap, the exhaust back pressure in the exhaust pipe increases, more exhaust gas is returned to the intake manifold accordingly.

Bevorzugt ist das Thermoelement eine Bimetallfeder oder eine Memoryfeder. Preferably, the thermocouple is a bimetallic spring or a Memory spring.

Als Abgasklappen können die für Motorbremsvorrichtungen bekannten Abgasklappen verwendet werden.As exhaust valves, the known for engine braking devices Exhaust flaps are used.

Erfindungsgemäß ist die Brennkraftmaschine eine selbstzündende Brennkraftmaschine.According to the invention, the internal combustion engine is a self-igniting Internal combustion engine.

Bevorzugt ist eine Verwendung der erfindungsgemäßen Brennkraftmaschinen als stationärer Motor, insbesondere zum Antrieb eines Generators zur Stromerzeugung.Preferred is a use of the internal combustion engine according to the invention as a stationary motor, in particular for driving a Generator for power generation.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind der Zeichnungsbeschreibung zu entnehmen, in der die in den Figuren dargestellten Ausführungsbeispiele näher beschrieben sind. Es zeigen:

Fig.1
eine Ansicht einer Brennkraftmaschine mit einer AGR-Regelung, die eine Abgasklappe in der Abgasrückführleitung aufweist,
Fig.2
eine Ansicht einer Brennkraftmaschine mit einer AGR-Regelung, die eine Abgasklappe in der Abgasleitung aufweist und
Fig.3
eine Abgasrückführleitung aus Grauguss mit einer Innen- und Außenverrippung in Draufsicht und Längs- und Querschnitt.
Further advantageous embodiments of the invention are described in the drawings, in which the embodiments illustrated in the figures are described in more detail. Show it:
Fig.1
a view of an internal combustion engine with an EGR control having an exhaust valve in the exhaust gas recirculation line,
Fig.2
a view of an internal combustion engine with an EGR control having an exhaust flap in the exhaust pipe and
Figure 3
an exhaust gas recirculation line of gray cast iron with an internal and external ribbing in plan view and longitudinal and cross-section.

Figur 1 zeigt einen Ausschnitt aus einer Brennkraftmaschine 1. Im Folgenden werden nur die für die Erfindung relevanten Teile beschrieben.Figure 1 shows a section of an internal combustion engine 1. Im Only the parts relevant to the invention will be described below.

Die Ansaugluft gelangt über eine Ansaugleitung 2 über hier nicht gezeigte Gaswechselventile in die einzelnen Brennräume 3 der Brennkraftmaschine 1. Der Ansaugleitung 2 benachbart ist eine Abgasleitung 4 vorgesehen, über die die Abgase aus den Brennräumen 3 gleichfalls über nicht gezeigte Gaswechselventile abgeführt werden. The intake air passes via an intake passage 2 via not shown here Gas exchange valves in the individual combustion chambers 3 of the internal combustion engine 1. The intake pipe 2 adjacent is an exhaust pipe 4 provided, via which the exhaust gases from the combustion chambers. 3 are also removed via not shown gas exchange valves.

Eine Abgasrückführleitung 5, ausgehend von einer Abgasentnahme 8 an der Abgasleitung 4, verbindet die Abgasleitung 4 mit der Ansaugleitung 2. In der Abgasrückführleitung 5, vor deren Eintritt in die Ansaugleitung 2, ist eine Abgasklappe 7 angeordnet, mit der der Durchlassquerschnitt der Abgasrückführleitung 5 regelbar ist.An exhaust gas recirculation line 5, starting from an exhaust gas removal 8 at the exhaust pipe 4, the exhaust pipe 4 connects to the intake pipe 2. In the exhaust gas recirculation line 5, before entering the Suction line 2, an exhaust valve 7 is arranged, with the Passage cross section of the exhaust gas recirculation line 5 is adjustable.

Gesteuert wird diese Abgasklappe 7 von einem mechanischen Thermoelement 6 als Temperatursensor. Das Thermoelement 6 ist dabei in der Abgasleitung 4 in Strömungsrichtung vor der Abgasentnahme 8 der Abgasrückführleitung 5 angeordnet. Als Thermoelement 6 kommt bevorzugt eine Bimetallfeder oder eine Memoryfeder in Frage. Zur Steuerung der Abgasklappe 7 ist die temperaturabhängige mechanische Auslenkung des Thermoelements 6 mit der Abgasklappe 7 derart verbunden, dass die Abgasklappe 7 durch die Auslenkung des Thermoelements 6 geregelt bzw. gesteuert wird.This exhaust flap 7 is controlled by a mechanical thermocouple 6 as a temperature sensor. The thermocouple 6 is here in the exhaust pipe 4 in the flow direction before the exhaust gas removal 8 the exhaust gas recirculation line 5 is arranged. As a thermocouple 6 comes preferably a bimetallic spring or a memory spring in question. to Control of the exhaust valve 7 is the temperature-dependent mechanical Deflection of the thermocouple 6 with the exhaust valve 7 so connected to the exhaust flap 7 by the deflection of the Thermocouple 6 is controlled or controlled.

Da die Abgastemperatur direkt lastabhängig ist, ist mit dieser AGR-Regelung eine rein mechanische Regelung geschaffen, bei der unter anderem keine elektronische Steuereinrichtung erforderlich ist.Since the exhaust gas temperature is directly load-dependent, is with this EGR control created a purely mechanical scheme in which under Others no electronic control device is required.

Figur 2 zeigt eine alternative Ausführungsform einer AGR-Regelung, bei der eine Abgasklappe 7 in Strömungsrichtung hinter der Abgasentnahme 8 der Abgasrückführleitung 5 angeordnet ist.FIG. 2 shows an alternative embodiment of an EGR control, in an exhaust flap 7 in the flow direction behind the exhaust gas removal 8 of the exhaust gas recirculation line 5 is arranged.

Die Ansaugluft gelangt über eine Ansaugleitung 2 über hier nicht gezeigte Gaswechselventile in die einzelnen Brennräume 3 der Brennkraftmaschine 1. Der Ansaugleitung 2 benachbart ist eine Abgasleitung 4 vorgesehen, über die die Abgase aus den Brennräumen 3 gleichfalls über nicht gezeigte Gaswechselventile abgeführt werden.The intake air passes via an intake passage 2 via not shown here Gas exchange valves in the individual combustion chambers 3 of the internal combustion engine 1. The intake pipe 2 adjacent is an exhaust pipe 4 provided, via which the exhaust gases from the combustion chambers. 3 are also removed via not shown gas exchange valves.

Eine Abgasrückführleitung 5, ausgehend von einer Abgasentnahme 8 an der Abgasleitung 4, verbindet die Abgasleitung 4 mit der Ansaugleitung 2. Zum Unterschied zur Ausführungsform gemäß Figur 1 ist bei dieser Ausführungsform die Abgasklappe 7 in der Abgasleitung 4 in Strömungsrichtung hinter der Abgasentnahme 8 der Abgasrückführleitung 5 angeordnet.An exhaust gas recirculation line 5, starting from an exhaust gas removal 8 at the exhaust pipe 4, the exhaust pipe 4 connects to the Suction line 2. In contrast to the embodiment according to FIG 1 is the exhaust valve 7 in the exhaust pipe in this embodiment 4 in the flow direction behind the exhaust gas removal 8 of the exhaust gas recirculation line 5 arranged.

Bei dieser Ausführungsform bleibt die Abgasrückführleitung 5 immer mit ihrem vollen Durchlassquerschnitt mit der Ansaugleitung 2 verbunden. Wird durch Schließen der Abgasklappe 7 der Abgasgegendruck in der Abgasleitung 4 erhöht, wird entsprechend mehr Abgas in die Ansaugleitung zurückgeführt.In this embodiment, the exhaust gas recirculation line 5 always remains connected to the intake passage 2 with its full passage cross-section. Is by closing the exhaust valve 7, the exhaust back pressure increases in the exhaust pipe 4, is correspondingly more Exhaust gas returned to the intake.

Wie schon in der Beschreibung zu Figur 1 ausgeführt, ist das Thermoelement bevorzugt eine Bimetallfeder oder eine Memoryfeder. Als Abgasklappe 7 kann eine für Motorbremsvorrichtungen bekannte Abgasklappe verwendet werden.As already stated in the description of FIG. 1, the thermocouple is preferably a bimetallic spring or a memory spring. When Exhaust flap 7 may be known for engine braking devices exhaust flap be used.

Die Brennkraftmaschine 1 ist bevorzugt eine selbstzündende Brennkraftmaschine (Dieselmotor), insbesondere zur Verwendung als stationärer Motor, bevorzugt zum Antrieb eines Generators zur Stromerzeugung. Die Brennkraftmaschine ist luftgekühlt und weist ein Einspritzsystem auf, das einen mechanischen Regler zur Steuerung der Einspritzung aufweist.The internal combustion engine 1 is preferably a self-igniting internal combustion engine (Diesel engine), especially for use as stationary Motor, preferably for driving a generator for generating electricity. The internal combustion engine is air-cooled and has an injection system on, which has a mechanical regulator for controlling the Injection has.

Figur 3 zeigt eine Abgasrückführleitung 5 aus Grauguss mit einer Innen- 9 und Außenverrippung 10 in Draufsicht und Längs- und Querschnitt.Figure 3 shows an exhaust gas recirculation line 5 made of gray cast iron with a Inner 9 and outer ribbing 10 in plan view and longitudinal and cross section.

Die Außenverrippung 10 besteht in dieser Ausführungsform aus sich in radialer Richtung der Abgasrückführleitung 5 erstreckenden und auf dem Außenumfang umlaufenden Rippenringen 11. Die einzelnen Rippenringe 11 sind dabei hintereinander mit gleichem Abstand angeordnet. The outer ribbing 10 is in this embodiment of itself in the radial direction of the exhaust gas recirculation line 5 extending and on the outer circumference circumferential rib rings 11. The individual Rib rings 11 are arranged one behind the other with the same distance.

Die Innenverrippung 9 besteht aus in Längsrichtung hintereinander angeordneten Rippenringen 12. Diese Rippenringe 12 bestehen jeweils aus einzelnen sich in Längsrichtung und radial nach innen erstreckenden Rippen 14. Die Größe dieser Rippen 14, d.h. deren Länge in Längsrichtung ist bei allen Rippen gleich.The inner ribbing 9 consists of one behind the other in the longitudinal direction arranged rib rings 12. These rib rings 12 are each from individual in the longitudinal direction and radially inward extending ribs 14. The size of these ribs 14, i. their Length in the longitudinal direction is the same for all ribs.

Zur besseren Kühlung sind die Rippen 14a eines Rippenringes 12a zu den Rippen 14b seines benachbarten Rippenringes 12b versetzt angeordnet. Dieser Versatz beträgt dabei den halben Abstand zwischen zwei benachbarten Rippen 14 eines Rippenringes 12.For better cooling, the ribs 14a of a rib ring 12a offset to the ribs 14b of its adjacent rib ring 12b arranged. This offset is half the distance between two adjacent ribs 14 of a rib ring 12th

Bevorzugt besteht jeder Rippenring 12 aus zehn bis zweiundzwanzig im gleichen Abstand auf dem Innenumfang angeordneten Rippen 14. Bei dieser in der Figur 3 bevorzugten Ausführungsform besteht jeder Rippenring 12 aus sechzehn im gleichen Abstand auf dem Innenumfang angeordneten Rippen 14.Each rib ring 12 preferably consists of ten to twenty-two at the same distance on the inner circumference arranged ribs 14th In this preferred embodiment in FIG. 3, each one exists Rib ring 12 of sixteen at the same distance on the inner circumference arranged ribs 14th

Mit dem Bezugszeichen 13 ist ein Anschlussflansch bezeichnet, der - wie dargestellt - als Schraubflansch oder aber auch beispielsweise als Steckflansch ausgebildet sein kann. The reference numeral 13 denotes a connecting flange, which - as shown - as a screw or even for example can be designed as a plug-in flange.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
BrennkraftmaschineInternal combustion engine
22
Ansaugleitungsuction
33
Brennräumecombustion chambers
44
Abgasleitungexhaust pipe
55
AbgasrückführleitungExhaust gas recirculation line
66
Thermoelementthermocouple
77
Abgasklappeexhaust flap
88th
Abgasentnahmeexhaust gas sampling
99
InnenverrippungInnenverrippung
1010
Außenverrippungouter ribbing
1111
außen umlaufender Rippenringouter circumferential ribbed ring
12, a, b12, a, b
Rippenringrib ring
1313
Anschlussflanschflange
14, a, b,14, a, b,
Ripperib

Claims (9)

Brennkraftmaschine (1) mit einer Ansaugleitung (2) zur Zuführung der Ansaugluft zu den einzelnen Brennräumen (3), mit einer Abgasleitung (4) zur Abführung der Abgase aus den Brennräumen (3) und mit einer die Ansaugleitung (2) und die Abgasleitung (4) verbindenden Abgasrückführleitung (5), wobei in der Abgasleitung (4) ein die Rückführung von Abgas durch die Abgasrückführleitung (5) steuernder Temperatursensor angeordnet ist,
dadurch gekennzeichnet, dass der Temperatursensor ein mechanisches Thermoelement (6) ist, dessen temperaturabhängige Auslenkung eine Abgasklappe (7) mechanisch steuert.Internal combustion engine (1) with an intake line (2) for supplying the intake air to the individual combustion chambers (3), with an exhaust pipe (4) for discharging the exhaust gases from the combustion chambers (3) and with an intake pipe (2) and the exhaust pipe (3). 4) connecting exhaust gas recirculation line (5), wherein in the exhaust line (4) a return of exhaust gas through the exhaust gas recirculation line (5) controlling temperature sensor is arranged,
characterized in that the temperature sensor is a mechanical thermocouple (6) whose temperature-dependent deflection controls an exhaust flap (7) mechanically. Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass das Thermoelement (6) in der Abgasleitung (4) in Strömungsrichtung vor der Abgasentnahme (8) der Abgasrückführleitung (5) angeordnet ist.Internal combustion engine according to claim 1,
characterized in that the thermocouple (6) in the exhaust pipe (4) in the flow direction before the exhaust gas removal (8) of the exhaust gas recirculation line (5) is arranged. Brennkraftmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Abgasklappe (7) in der Abgasrückführleitung (5) angeordnet ist.Internal combustion engine according to claim 1 or 2,
characterized in that the exhaust flap (7) in the exhaust gas recirculation line (5) is arranged. Brennkraftmaschine nach Anspruch 3,
dadurch gekennzeichnet, dass die Abgasklappe (7) in der Abgasrückführleitung (5) vor dem Eintritt in die Ansaugleitung (2) angeordnet ist. Internal combustion engine according to claim 3,
characterized in that the exhaust flap (7) in the exhaust gas recirculation line (5) is arranged prior to entry into the suction line (2). Brennkraftmaschine nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Abgasklappe (7) in der Abgasleitung (4) in Strömungsrichtung hinter der Abgasentnahme (8) der Abgasrückführleitung (5) angeordnet ist.Internal combustion engine according to claim 1 or 2,
characterized in that the exhaust flap (7) in the exhaust pipe (4) in the flow direction behind the exhaust gas removal (8) of the exhaust gas recirculation line (5) is arranged. Brennkraftmaschine nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass das Thermoelement (6) eine Bimetallfeder oder eine Memoryfeder ist.Internal combustion engine according to one of claims 1 to 5,
characterized in that the thermocouple (6) is a bimetallic spring or a memory spring. Brennkraftmaschine nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Abgasklappe (7) eine für Motorbremsvorrichtungen bekannte Abgasklappe ist.Internal combustion engine according to one of claims 1 to 6,
characterized in that the exhaust flap (7) is known for engine brake devices exhaust flap. Brennkraftmaschine nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die Brennkraftmaschine (1) eine selbstzündende Brennkraftmaschine ist.Internal combustion engine according to one of claims 1 to 7,
characterized in that the internal combustion engine (1) is a self-igniting internal combustion engine. Brennkraftmaschine nach einem der Ansprüche 1 bis 8 zur Verwendung als stationärer Motor, insbesondere zum Antrieb eines Generators zur Stromerzeugung.Internal combustion engine according to one of claims 1 to 8 for use as a stationary motor, in particular for driving a Generator for power generation.
EP04025856A 2003-12-20 2004-10-30 Exhaust gas recirculation control having mechanical temperature control Withdrawn EP1544450A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360093A DE10360093A1 (en) 2003-12-20 2003-12-20 EGR control with mechanical temperature control
DE10360093 2003-12-20

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EP1544450A3 EP1544450A3 (en) 2007-08-22

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Citations (9)

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EP0521411A1 (en) * 1991-07-04 1993-01-07 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Exhaust pipe for an internal combustion engine
DE19912317A1 (en) * 1999-03-19 2000-09-28 Daimler Chrysler Ag Automobile engine exhaust gas feedback regulation method uses temperature sensors for detecting temperature of fresh air, exhaust gas and combustion gas mixture for calculating exhaust gas component in gas mixture
GB2353328A (en) * 1999-08-20 2001-02-21 Cummins Engine Co Inc Turbocharged i.c. engine with EGR system and exhaust throttle
US20030127077A1 (en) * 2002-01-10 2003-07-10 Detroit Diesel Corporation System for purging exhaust gases from exhaust gas recirculation system

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DK170218B1 (en) * 1993-06-04 1995-06-26 Man B & W Diesel Gmbh Large pressurized diesel engine
DE9421145U1 (en) * 1994-04-28 1995-05-04 Mtu Friedrichshafen Gmbh Diesel internal combustion engine with a heat exchanger for exhaust gas cooling arranged in an exhaust gas recirculation line
DE19742445C1 (en) * 1997-09-26 1998-11-19 Daimler Benz Ag Engine braking control for turbocharged combustion engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512509A (en) * 1969-04-10 1970-05-19 Atlantic Richfield Co Control mechanism for exhaust recycle system
GB1423060A (en) * 1972-04-29 1976-01-28 Philips Nv Device for converting calorific energy into mechanical energy
US5056309A (en) * 1987-07-03 1991-10-15 Robert Bosch Gmbh Internal combustion engine, particularly otto engine
DE3931812C1 (en) * 1989-09-23 1990-05-10 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
JPH04136581A (en) * 1990-09-27 1992-05-11 Mitsubishi Electric Corp Valve
EP0521411A1 (en) * 1991-07-04 1993-01-07 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Exhaust pipe for an internal combustion engine
DE19912317A1 (en) * 1999-03-19 2000-09-28 Daimler Chrysler Ag Automobile engine exhaust gas feedback regulation method uses temperature sensors for detecting temperature of fresh air, exhaust gas and combustion gas mixture for calculating exhaust gas component in gas mixture
GB2353328A (en) * 1999-08-20 2001-02-21 Cummins Engine Co Inc Turbocharged i.c. engine with EGR system and exhaust throttle
US20030127077A1 (en) * 2002-01-10 2003-07-10 Detroit Diesel Corporation System for purging exhaust gases from exhaust gas recirculation system

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DE10360093A1 (en) 2005-07-21

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