EP3325796A1 - Internal combustion engine and method for detecting a leak from a crankcase and/or a tank ventilation system - Google Patents

Internal combustion engine and method for detecting a leak from a crankcase and/or a tank ventilation system

Info

Publication number
EP3325796A1
EP3325796A1 EP16730333.8A EP16730333A EP3325796A1 EP 3325796 A1 EP3325796 A1 EP 3325796A1 EP 16730333 A EP16730333 A EP 16730333A EP 3325796 A1 EP3325796 A1 EP 3325796A1
Authority
EP
European Patent Office
Prior art keywords
pressure
line
sensor
check valve
internal combustion
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
EP16730333.8A
Other languages
German (de)
French (fr)
Other versions
EP3325796B1 (en
Inventor
Robert Biebl
Jessica Golladay
Markus Haslbeck
Stephan RENNER
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP3325796A1 publication Critical patent/EP3325796A1/en
Application granted granted Critical
Publication of EP3325796B1 publication Critical patent/EP3325796B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/1038—Sensors for intake systems for temperature or pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F01M13/023—Control valves in suction conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/028—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of positive pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0809—Judging failure of purge control system
    • F02M25/0827—Judging failure of purge control system by monitoring engine running conditions
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/089—Layout of the fuel vapour installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/0044—Layout of crankcase breathing systems with one or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/027—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with a turbo charger or compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F01M2250/60—Operating parameters
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold

Definitions

  • the invention relates to an internal combustion engine with the features of the preamble of patent claim 1 and a method for detecting a leakage of a crankcase and / or a tank-venting system with the features of claim 6.
  • one or a common check valve is arranged directly at the connection points in each case.
  • Intake air line to be initiated. This is to prevent that it comes as a result of the release of the compounds at the connection points or leakage to an undesirable pollutant emission of unburned hydrocarbons in the environment. While monitoring the connection points of the tank and / or crankcase ventilation line and the lines that open behind the throttle in the intake air line and in the suction mode for supplying the venting gases in the
  • the present invention has the object to show an internal combustion engine, with a simple and inexpensive leakage of a crankcase and / or a tank ventilation system can be detected.
  • a diagnostic device is provided for the detection of a leakage according to claim 3.
  • This may also be an electronic control unit.
  • Figure 1 shows a schematic representation of an inventive
  • FIG. 2 shows a schematic representation of the invention
  • FIG. 3 shows a schematic representation of the invention
  • FIG. 4 shows a logic of a leakage diagnosis in a table.
  • FIG. 1 shows a schematic representation of an internal combustion engine 1 according to the invention with, for example, four drawn cylinders 1 ' shown by circles, with a combustion air intake system 2, in which a compressor 3, for example an exhaust gas turbocharger or a mechanical compressor, in the flow direction of a combustion air ( represented by an arrow in the compressor) behind a throttle element 4, such. B. a throttle valve are arranged.
  • the physical separation of the tank ventilation system 5 and the crankcase ventilation system 6 is shown schematically by arrows.
  • the tank ventilation system 5 can be connected via a first check valve 7 with a first line 8 to the intake system 2 in the flow direction of the intake air downstream of the throttle element 4.
  • the tank venting system 5 via a second and a third check valve 9, 10 in a second line 11 with the intake 2 before the compressor 3 can be connected.
  • the crankcase ventilation system 6 is connectable via a fourth check valve 12 in a third line 13 to the intake system 2 after the throttle element 4 and via a fourth line 14 and the third check valve 10 with the intake system 2 in front of the compressor 3.
  • the second line 11 and the fourth line 14 share the common third check valve 10.
  • this can also be provided for two separate lines, each with a check valve.
  • the intake system 2 is connectable to the throttle element 4 via a fifth check valve 15 in a fifth line 16 to the second line 11 at a line transition between the second line 1 1 and the second part line 11 ', wherein at the line transition of the fifth line 16 in the second line 1 1 and the second part line 11 ', a nozzle 17, preferably a Laval nozzle, is formed, in which the second line 11 to the second check valve 9 opens, wherein between the second check valve 9 and the nozzle 17 in the second Line 11, a first pressure sensor 18 for measuring the pressure in the second line 1 1 is provided.
  • a leakage in the tank ventilation system 5 or in the crankcase ventilation system 6 can be detected in a simple manner with a single pressure sensor, the model pressure always representing a fault-free system.
  • a second pressure sensor 19 for measuring the pressure in the second part line 11 'or the fourth line 14 is provided after the nozzle 17 in the second line 11 or the fourth line 14.
  • the pressure evaluation of the pressure sensors 18, 19 is again preferably carried out by the diagnostic apparatus 20.
  • Diagnostic device 20 Leakage in the tank ventilation system 5.
  • an oil separator 23 is provided to safely prevent the influx of oil mist into the combustion air intake system 2.
  • Tank vent valve 22 is provided in the first conduit 8 between the tank 21 and the first and second check valves 7, 9 to control the tank venting as needed.
  • Throttle element which may be a volume flow or pressure control valve, a desired crankcase pressure is set.
  • FIG. 2 again shows the internal combustion engine 1 according to the invention from FIG. 1, with the pressure ratios and flow conditions in FIG. 1, with the pressure ratios and flow conditions in FIG. 1
  • crankcase vent gases first pass through the oil separator 23 and then into the third conduit 13 via the fourth check valve 12
  • Combustion air intake system 2 out. These flow conditions are adjusted by the fact that there is a negative pressure in the combustion air intake system 2 after the compressor 3, since the pistons, not shown, in the cylinders V act like a vacuum pump.
  • FIG. 3 shows the internal combustion engine 1 according to the invention for turbo operation, ie when the compressor 3 compresses the combustion air upstream of the cylinders 1 ' .
  • the compressor 3 compresses the combustion air upstream of the cylinders 1 ' .
  • the Crankcase ventilation gases via the oil separator 23 and the fourth line 14 also via the third check valve 10 in the
  • Combustion air intake system 2 introduced in front of the compressor 3 and from there, together with the tank ventilation gases further transported in the direction of the cylinder V.
  • FIG. 4 shows the logic of the interference signal output by the diagnostic device 20 in a table. If a sensor pressure equals the model pressure, the logic value is 1. If a sensor pressure is not equal to the model pressure, the logic value is 0.

Abstract

The invention relates to an internal combustion engine with a combustion air intake system in which a compressor is arranged and in which a throttle element is arranged downstream of the compressor in the flow direction of the combustion air. The internal combustion engine also comprises a tank ventilation system and a crankcase ventilation system. The tank ventilation system can be connected to the intake system downstream of the throttle element via a first non-return valve in a first line and upstream of the compressor via a second non-return valve in a second line and a third non-return valve in a second sub-line. The crankcase ventilation system can be connected to the intake system downstream of the throttle element via a fourth non-return valve in a third line and upstream of the compressor via a fourth line and the third non-return valve. The intake system can be connected to the second line downstream of the throttle element at a transitional point between the second line and the second sub-line via a fifth non-return valve in a fifth line. A nozzle is formed at the transitional point from the fifth line to the second line and the second sub-line, and the second line opens into the nozzle downstream of the second non-return valve. A first pressure sensor for measuring the pressure in the second line is provided in the second line between the second non-return valve and the nozzle. By means of the internal combustion engine design according to the invention with a crankcase and a tank ventilation system and by means of the corresponding methods, only a single pressure sensor is required to diagnose or detect a leak. A second pressure sensor can be advantageously used to locate a leak.

Description

Brennkraftmaschine und Verfahren zur Erkennung einer Leckage von einem Kurbelgehäuse- und/oder einem Tank-Entlüftungssystem  Internal combustion engine and method for detecting leakage from a crankcase and / or tank venting system
Die Erfindung betrifft eine Brennkraftmaschine mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1 sowie ein Verfahren zur Erkennung einer Leckage von einem Kurbelgehäuse- und/oder einem Tank-Entlüftungssystem mit den Merkmalen aus dem Patentanspruch 6. The invention relates to an internal combustion engine with the features of the preamble of patent claim 1 and a method for detecting a leakage of a crankcase and / or a tank-venting system with the features of claim 6.
Zum technischen Umfeld wird beispielsweise auf die deutsche For technical environment is for example on the German
Offenlegungsschrift DE 10 2009 008 831 A1 , von der die vorliegende Laid-open publication DE 10 2009 008 831 A1, of which the present
Erfindung ausgeht, hingewiesen. Aus der DE 10 2009 008 831 A1 ist eine Brennkraftmaschine mit einer Ansaugluftleitung bekannt, die einen Verdichter eines Abgasturboladers und eine Drosselklappe enthält, sowie mit einem Tank-Entlüftungssystem und einem Kurbelgehäuse-Entlüftungssystem, die an zwei Anschlussstellen vor dem Verdichter und hinter der Drosselklappe an die Ansaugluftleitung angeschlossen sind. Um auf relativ einfache Weise eine Überwachung der Einleitstellen der Entlüftungsgase in die Invention, pointed out. From DE 10 2009 008 831 A1 an internal combustion engine with an intake air line is known, which includes a compressor of an exhaust gas turbocharger and a throttle, as well as with a tank venting system and a crankcase ventilation system, the two connection points in front of the compressor and behind the throttle the intake air line are connected. To a relatively simple way monitoring the discharge points of the vent gases in the
Ansaugluftleitung zu ermöglichen, wird vorgeschlagen, dass unmittelbar an den Anschlussstellen jeweils ein oder ein gemeinsames Rückschlagventil angeordnet ist. To allow intake air line, it is proposed that one or a common check valve is arranged directly at the connection points in each case.
Da ein Defekt des Tank-Entlüftungssystems und/oder des Kurbelgehäuse- Entlüftungssystems zum Entweichen von unverbrannten As a defect of the tank ventilation system and / or the crankcase ventilation system for the escape of unburned
Kohlenwasserstoffen in die Umgebung führt, sind in den meisten Staaten bereits seit längerem Diagnoseverfahren gesetzlich vorgeschrieben, mit denen sich die ordnungsgemäße Funktion des Tank-Entlüftungssystems und/oder des Kurbelgehäuse-Entlüftungssystems diagnostizieren lässt, so dass sich eine zum Entweichen von unverbrannten Kohlenwasserstoff führende Störung frühzeitig erkennen und beheben lässt. Darüber hinaus fordert jedoch das California Air Ressource Board (CARB) bei Hydrocarbons into the environment, are in most countries for a long time diagnostic procedures required by law, with which can be used to diagnose the proper functioning of the tank venting system and / or the crankcase ventilation system so that a disturbance leading to the escape of unburned hydrocarbon can be detected and remedied at an early stage. In addition, however, the California Air Resource Board (CARB) is calling for
Brennkraftmaschinen mit einem Abgasturbolader nunmehr auch noch eine zusätzliche Überwachung der Einleitstellen, an denen die Tank- Entlüftungsgase und die Kurbelgehäuse-Entlüftungsgase in die Internal combustion engines with an exhaust gas turbocharger now also an additional monitoring of the discharge points at which the tank ventilation gases and the crankcase ventilation gases in the
Ansaugluftleitung eingeleitet werden. Damit soll verhindert werden, dass es in Folge des Lösens der Verbindungen an den Anschlussstellen oder einer Leckage zu einer unerwünschten Schadstoffemission von unverbrannten Kohlenwasserstoffen in die Umgebung kommt. Während die Überwachung der Anschlussstellen der Tank- und/oder Kurbelgehäuse-Entlüftungsleitung und der Leitungen, die hinter der Drosselklappe in die Ansaugluftleitung münden und im Saugbetrieb zur Zufuhr der Entlüftungsgase in die Intake air line to be initiated. This is to prevent that it comes as a result of the release of the compounds at the connection points or leakage to an undesirable pollutant emission of unburned hydrocarbons in the environment. While monitoring the connection points of the tank and / or crankcase ventilation line and the lines that open behind the throttle in the intake air line and in the suction mode for supplying the venting gases in the
Ansaugluftleitung dienen, keine Probleme bereitet, lässt sich die Serve intake air line, no problems, can the
Anschlussstelle vor dem Verdichter des Abgasturboladers in die Connection point in front of the compressor of the turbocharger in the
Ansaugluftleitung mündenden Tank- und/oder Kurbelgehäuse- Entlüftungsleitung oder Leitungen, durch welche die Entlüftungsgase im Ladedruckbetrieb in die Ansaugluftleitung eingeleitet werden, abhängig von der Sensorik und der Konstruktion nur schwer überwachen. Intake air line opening tank and / or crankcase ventilation line or lines through which the vent gases are introduced in the boost pressure operation in the intake air line, depending on the sensor and the construction difficult to monitor.
Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Brennkraftmaschine aufzuzeigen, mit der einfach und kostengünstig eine Leckage eines Kurbelgehäuse- und/oder eines Tank- Entlüftungssystems erkannt werden kann. Based on this prior art, the present invention has the object to show an internal combustion engine, with a simple and inexpensive leakage of a crankcase and / or a tank ventilation system can be detected.
Diese Aufgabe wird vorrichtungsmäßig mit den Merkmalen aus dem kennzeichnenden Teil des Patentanspruchs 1 und verfahrensmäßig mit den Merkmalen aus dem Patentanspruch 6 gelöst. So ist es mit der erfindungsgemäßen Ausgestaltung der Brennkraftmaschine gemäß Patentanspruch 1 möglich, mit nur einem einzigen Sensor, einen Drucksensor, eine Leckage in einem Kurbelgehäuse- und/oder einem Tank- Entlüftungssystem zu detektieren. This object is solved by the device with the features of the characterizing part of patent claim 1 and procedurally with the features of claim 6. Thus, it is possible with the inventive design of the internal combustion engine according to claim 1, with only a single sensor to detect a pressure sensor, leakage in a crankcase and / or a tank venting system.
Somit können die Anforderungen bezüglich der Schadstoffemissionen, insbesondere der Kohlenwasserstoffemissionen (HC-Emissionen), problemlos erfüllt werden. In vorteilhafter Weise wird, wie bereits dargestellt, nur ein einziger Drucksensor zur Diagnose/Leckage-Erkennung des Thus, the requirements for the pollutant emissions, in particular the hydrocarbon emissions (HC emissions) can be easily met. Advantageously, as already shown, only a single pressure sensor for diagnosis / leakage detection of
Kurbelgehäuse- und/oder des Tank-Entlüftungssystems benötigt. Crankcase and / or tank venting system required.
Mit der Ausgestaltung in Patentanspruch 2 ist es möglich, den Leckageort exakt zu definieren, ob sich die Leckage im Kurbelgehäuse- Entlüftungssystem oder in dem Tank-Entlüftungssystem befindet. With the embodiment in claim 2, it is possible to define the leak location exactly whether the leakage is in the crankcase ventilation system or in the tank ventilation system.
Bevorzugt wird für die Detektion einer Leckage gemäß Patentanspruch 3 ein Diagnosegerät vorgesehen. Hierbei kann es sich auch um ein elektronisches Steuergerät handeln. Preferably, a diagnostic device is provided for the detection of a leakage according to claim 3. This may also be an electronic control unit.
Mit der Ausgestaltung in diesem Patentanspruch 4 ist es möglich, die Tankentlüftung je nach Erfordernis zu- oder abzuschalten. With the configuration in this claim 4, it is possible to turn on or off the tank venting as required.
Mit der Ausgestaltung gemäß Patentanspruch 5 ist es möglich, den With the embodiment according to claim 5, it is possible to
Gasmassen- bzw. Gasmengenstrom einzustellen, so dass ein noch genaueres Detektieren einer Leckage ermöglicht ist. Adjust gas mass or gas flow rate, so that a more accurate detection of leakage is possible.
Mit dem Verfahren gemäß Patentanspruch 6 ist es möglich, einfach und kostengünstig eine Leckage im Kurbelgehäuse- und/oder dem Tank- Entlüftungssystem zu detektieren. With the method according to claim 6, it is possible to easily and inexpensively detect leakage in the crankcase and / or the tank venting system.
Mit dem Verfahren gemäß Patentanspruch 7 ist es möglich, eine Leckage im Kurbelgehäuse-Entlüftungssystem zu detektieren. Mit dem Verfahren nach Patentanspruch 8 ist es möglich, eine Leckage im Tank-Entlüftungssystem zu detektieren. With the method according to claim 7, it is possible to detect a leakage in the crankcase ventilation system. With the method according to claim 8, it is possible to detect a leak in the tank venting system.
Im Folgenden ist die Erfindung anhand von vier Figuren näher erläutert. In the following the invention is explained in more detail with reference to four figures.
Figur 1 zeigt in einer schematischen Darstellung eine erfindungsgemäße Figure 1 shows a schematic representation of an inventive
Brennkraftmaschine.  Internal combustion engine.
Figur 2 zeigt in einer schematischen Darstellung die erfindungsgemäße FIG. 2 shows a schematic representation of the invention
Brennkraftmaschine bei Saugbetrieb.  Internal combustion engine with suction operation.
Figur 3 zeigt in einer schematischen Darstellung die erfindungsgemäße FIG. 3 shows a schematic representation of the invention
Brennkraftmaschine bei Turbobetrieb.  Internal combustion engine during turbo operation.
Figur 4 zeigt in einer Tabelle eine Logik einer Leckagediagnose. FIG. 4 shows a logic of a leakage diagnosis in a table.
Im Folgenden gelten in den Figuren 1 bis 3 für gleiche Bauelemente die gleichen Bezugsziffern. In the following, the same reference numerals apply in the figures 1 to 3 for the same components.
Figur 1 zeigt in einer schematischen Darstellung eine erfindungsgemäße Brennkraftmaschine 1 mit beispielsweise vier eingezeichneten, durch Kreise dargestellten Zylindern 1 ', mit einem Verbrennungsluft-Ansaugsystem 2, in dem ein Verdichter 3, beispielsweise eines Abgasturboladers oder auch ein mechanischen Verdichter, in Strömungsrichtung einer Verbrennungsluft (dargestellt durch einen Pfeil im Verdichter) dahinter ein Drosselelement 4, wie z. B. einer Drosselklappe angeordnet sind. Weiter weist die 1 shows a schematic representation of an internal combustion engine 1 according to the invention with, for example, four drawn cylinders 1 ' shown by circles, with a combustion air intake system 2, in which a compressor 3, for example an exhaust gas turbocharger or a mechanical compressor, in the flow direction of a combustion air ( represented by an arrow in the compressor) behind a throttle element 4, such. B. a throttle valve are arranged. Next, the
Brennkraftmaschine 1 ein Tank-Entlüftungssystem 5 für einen Kraftstofftank 21 und ein Kurbelgehäuse-Entlüftungssystem 6 auf. Die räumliche Trennung des Tank-Entlüftungssystems 5 und des Kurbelgehäuse-Entlüftungssystems 6 ist schematisch durch Pfeile dargestellt. Das Tank-Entlüftungssystem 5 ist über ein erstes Rückschlagventil 7 mit einer ersten Leitung 8 mit dem Ansaugsystem 2 in Strömungsrichtung der Ansaugluft nach dem Drosselelement 4 verbindbar. Weiter ist das Tank- Entlüftungssystem 5 über ein zweites und ein drittes Rückschlagventil 9, 10 in einer zweiten Leitung 11 mit dem Ansaugsystem 2 vor dem Verdichter 3 verbindbar. Das Kurbelgehäuse-Entlüftungssystem 6 ist über ein viertes Rückschlagventil 12 in einer dritten Leitung 13 mit dem Ansaugsystem 2 nach dem Drosselelement 4 und über eine vierte Leitung 14 und das dritte Rückschlagventil 10 mit dem Ansaugsystem 2 vor dem Verdichter 3 verbindbar. In dem vorliegenden Ausführungsbeispiel teilen sich die zweite Leitung 11 und die vierte Leitung 14 das gemeinsame dritte Rückschlagventil 10. In einem anderen Ausführungsbeispiel können hierfür auch zwei separate Leitungen mit je einem Rückschlagventil vorgesehen werden. Internal combustion engine 1, a tank venting system 5 for a fuel tank 21 and a crankcase ventilation system 6 on. The physical separation of the tank ventilation system 5 and the crankcase ventilation system 6 is shown schematically by arrows. The tank ventilation system 5 can be connected via a first check valve 7 with a first line 8 to the intake system 2 in the flow direction of the intake air downstream of the throttle element 4. Next, the tank venting system 5 via a second and a third check valve 9, 10 in a second line 11 with the intake 2 before the compressor 3 can be connected. The crankcase ventilation system 6 is connectable via a fourth check valve 12 in a third line 13 to the intake system 2 after the throttle element 4 and via a fourth line 14 and the third check valve 10 with the intake system 2 in front of the compressor 3. In the present embodiment, the second line 11 and the fourth line 14 share the common third check valve 10. In another embodiment, this can also be provided for two separate lines, each with a check valve.
Erfindungsgemäß ist das Ansaugsystem 2 nach dem Drosselelement 4 über ein fünftes Rückschlagventil 15 in einer fünften Leitung 16 mit der zweiten Leitung 11 an einem Leitungsübergang zwischen der zweiten Leitung 1 1 und der zweiten Teilleitung 11 ' verbindbar ist, wobei an dem Leitungsübergang von der fünften Leitung 16 in die zweite Leitung 1 1 und die zweite Teilleitung 11 ' eine Düse 17, vorzugsweise eine Lavaldüse, ausgebildet ist, in die die zweite Leitung 11 nach dem zweiten Rückschlagventil 9 mündet, wobei zwischen dem zweiten Rückschlagventil 9 und der Düse 17 in der zweiten Leitung 11 ein erster Drucksensor 18 zur Messung des Druckes in der zweiten Leitung 1 1 vorgesehen ist. According to the invention, the intake system 2 is connectable to the throttle element 4 via a fifth check valve 15 in a fifth line 16 to the second line 11 at a line transition between the second line 1 1 and the second part line 11 ', wherein at the line transition of the fifth line 16 in the second line 1 1 and the second part line 11 ', a nozzle 17, preferably a Laval nozzle, is formed, in which the second line 11 to the second check valve 9 opens, wherein between the second check valve 9 and the nozzle 17 in the second Line 11, a first pressure sensor 18 for measuring the pressure in the second line 1 1 is provided.
Mit dieser Grundkonfiguration der Brennkraftmaschine 1 lässt sich nun erfindungsgemäß ein Verfahren zur Erkennung einer Leckage in einem Kurbelgehäuse- und/oder im Tank-Entlüftungssystem 5, 6 mit folgenden Verfahrensschritten darstellen: Verfahren 1 With this basic configuration of the internal combustion engine 1, a method for detecting a leak in a crankcase and / or in the tank ventilation system 5, 6 can now be represented according to the invention with the following method steps: Method 1
1. Starten der Brennkraftmaschine 1 , 1. starting the internal combustion engine 1,
2. Messen eines ersten Sensordrucks mit dem ersten Drucksensor 2. Measuring a first sensor pressure with the first pressure sensor
18, 18
3. Vergleich des ersten Sensordrucks mit einem ersten Modelldruck mit einem Diagnosegerät 20,  3. Comparison of the first sensor pressure with a first model pressure with a diagnostic device 20,
4. Auswerten, ob der Sensordruck von dem Modelldruck abweicht oder nicht,  4. Evaluate whether the sensor pressure deviates from the model pressure or not,
5. Bei keiner Abweichung des Sensordrucks von dem Modelldruck, keine Störausgabe durch das Diagnosegerät 20,  5. With no deviation of the sensor pressure from the model pressure, no noise output by the diagnostic device 20,
6. Bei Abweichung des Sensordrucks von dem Modelldruck, eine Störausgabe durch das Diagnosegerät 20.  6. If the sensor pressure deviates from the model pressure, a spurious output by the diagnostic device 20.
Somit lässt sich erfindungsgemäß eine Leckage in dem Tank- Entlüftungssystem 5 bzw. in dem Kurbelgehäuse-Entlüftungssystem 6 in einfacher Weise mit einem einzigen Drucksensor detektieren, wobei der Modelldruck immer ein fehlerfreies System darstellt. Thus, according to the invention, a leakage in the tank ventilation system 5 or in the crankcase ventilation system 6 can be detected in a simple manner with a single pressure sensor, the model pressure always representing a fault-free system.
In einer weiteren Ausbaustufe ist nach der Düse 17 in der zweiten Leitung 11 oder der vierten Leitung 14 ein zweiter Drucksensor 19 zur Messung des Drucks in der zweiten Teilleitung 11 ' oder der vierten Leitung 14 vorgesehen. Bevorzugt erfolgt die Druckauswertung der Drucksensoren 18, 19 wiederum durch das Diagnosegerät 20. Mit dieser weiteren Ausbaustufe der erfindungsgemäßen Brennkraftmaschine 1 sind nun zwei weitere Verfahren möglich, die folgende Verfahrensschritte aufweisen: In a further expansion stage, a second pressure sensor 19 for measuring the pressure in the second part line 11 'or the fourth line 14 is provided after the nozzle 17 in the second line 11 or the fourth line 14. The pressure evaluation of the pressure sensors 18, 19 is again preferably carried out by the diagnostic apparatus 20. With this further expansion stage of the internal combustion engine 1 according to the invention, two further methods are now possible which have the following method steps:
Verfahren 2 Method 2
1. Messen des ersten und eines zweiten Sensordrucks mit dem 1. Measuring the first and second sensor pressure with the
ersten Drucksensor 18 und dem zweiten Drucksensor 19, 2. Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und zweiten Modelldruck mit dem Diagnosegerät 20, first pressure sensor 18 and the second pressure sensor 19, 2. Comparing the first and the second sensor pressure with a first and second model pressure with the diagnostic device 20,
3. Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht,  3. Evaluate whether a sensor pressure deviates from the model pressure or not,
4. Bei Abweichung des ersten Sensordrucks von dem ersten  4. If the first sensor pressure deviates from the first
Modelldruck und des zweiten Sensordrucks von dem zweiten Modelldruck, Signalausgabe durch das Diagnosegerät 20, Leckage im Kurbelgehäuse-Entlüftungssystem 6.  Model pressure and the second sensor pressure of the second model pressure, signal output by the diagnostic device 20, leakage in the crankcase ventilation system. 6
Verfahren 3 Method 3
1. Messen des ersten und des zweiten Sensordrucks mit dem ersten Drucksensor 18 und dem zweiten Drucksensor 19, 1. measuring the first and the second sensor pressure with the first pressure sensor 18 and the second pressure sensor 19,
2. Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und einem zweiten Modelldruck mit einem Diagnosegerät 20, 2. Comparing the first and the second sensor pressure with a first and a second model pressure with a diagnostic device 20,
3. Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht, 3. Evaluate whether a sensor pressure deviates from the model pressure or not,
4. Bei einer Abweichung des ersten Sensordrucks von dem ersten Modelldruck und keiner Abweichung des zweiten Sensordrucks von einem zweiten Modelldruck, Störsignalausgabe durch das  4. In a deviation of the first sensor pressure of the first model pressure and no deviation of the second sensor pressure of a second model pressure, noise output by the
Diagnosegerät 20 Leckage im Tank-Entlüftungssystem 5.  Diagnostic device 20 Leakage in the tank ventilation system 5.
Zur Vollständigkeit der erfindungsgemäßen Brennkraftmaschine 1 sei noch angemerkt, dass die Ansaugluft durch einen Luftfilter 24 gereinigt wird, bevor sie in das Verbrennungsluft-Ansaugsystem 2 eintritt. Weiter ist im For the sake of completeness of the internal combustion engine 1 according to the invention, it should also be noted that the intake air is cleaned by an air filter 24 before it enters the combustion air intake system 2. Next is in the
Kurbelgehäuse-Entlüftungssystem 6 ein ölabscheider 23 vorgesehen, um das Einströmen von Ölnebel in das Verbrennungsluft-Ansaugsystem 2 sicher zu vermeiden. Crankcase ventilation system 6, an oil separator 23 is provided to safely prevent the influx of oil mist into the combustion air intake system 2.
In einer weiteren Ausführungsform ist in der ersten Leitung 8 zwischen dem Tank 21 und dem ersten und zweiten Rückschlagventil 7, 9 ein Tankentlüftungsventil 22 vorgesehen, um die Tankentlüftung bedarfsgerecht zu steuern. In another embodiment, in the first conduit 8 between the tank 21 and the first and second check valves 7, 9 a Tank vent valve 22 is provided to control the tank venting as needed.
In einer weiteren bevorzugten Ausführungsform ist zwischen dem vierten Rückschlagventil 12 und der vierten Leitung 14 ein zweites, nicht In a further preferred embodiment, a second, not between the fourth check valve 12 and the fourth line 14
dargestelltes Drosselelement 4 vorgesehen. Mit Hilfe dieses zweiten illustrated throttle element 4 is provided. With the help of this second
Drosselelementes, welches einen Volumenstrom- bzw. Druckregelventil sein kann, wird ein gewünschter Kurbelgehäusedruck eingestellt. Throttle element, which may be a volume flow or pressure control valve, a desired crankcase pressure is set.
Figur 2 zeigt nochmals die erfindungsgemäße Brennkraftmaschine 1 aus der Figur 1 , mit den Druckverhältnissen und Strömungsverhältnissen im FIG. 2 again shows the internal combustion engine 1 according to the invention from FIG. 1, with the pressure ratios and flow conditions in FIG
Saugbetrieb, d. h. bei einem Betrieb bei dem noch kein Laderdruck von dem Verdichter aufgebaut ist. Die Kurbelgehäuse-Entlüftungsgase sind punktiert dargestellt, die Tank-Entlüftungsgase sind gestrichelt dargestellt. Wie in Figur 2 dargestellt, erfolgt die Tankentlüftung im Saugbetrieb über das Suction operation, d. H. in an operation in which no supercharger pressure is built up from the compressor. The crankcase ventilation gases are shown dotted, the tank vent gases are shown in dashed lines. As shown in Figure 2, the tank ventilation is carried out in the suction operation on the
Tankentlüftungsventil 22 und das Rückschlagventil 7 in das Tank vent valve 22 and the check valve 7 in the
Verbrennungsluft-Ansaugsystem 2. Die Kurbelgehäuse-Entlüftungsgase strömen zuerst durch den ölabscheider 23 und werden dann anschließend über das vierte Rückschlagventil 12 in der dritten Leitung 13 in das Combustion Air Intake System 2. The crankcase vent gases first pass through the oil separator 23 and then into the third conduit 13 via the fourth check valve 12
Verbrennungsluft-Ansaugsystem 2 geführt. Diese Strömungsverhältnisse stellen sich dadurch ein, dass im Verbrennungsluft-Ansaugsystem 2 nach dem Verdichter 3 ein Unterdruck herrscht, da die nicht dargestellten Kolben in den Zylindern V wie eine Unterdruckpumpe wirken. Combustion air intake system 2 out. These flow conditions are adjusted by the fact that there is a negative pressure in the combustion air intake system 2 after the compressor 3, since the pistons, not shown, in the cylinders V act like a vacuum pump.
Dem gegenüber zeigt Figur 3 die erfindungsgemäße Brennkraftmaschine 1 für den Turbobetrieb, d. h. wenn der Verdichter 3 die Verbrennungsluft vor den Zylindern 1 ' verdichtet. In diesem Fall herrscht im Verbrennungsluft- Ansaugsystem 2 nach dem Verdichter 3 ein Überdruck, was dazu führt, dass die Tankentlüftungsgase über das Tankentlüftungsventil 22 und das zweite Rückschlagventil 9 in Richtung der Düse 17 und von dort weiter über das dritte Rückschlagventil 10 in das Verbrennungsluftansaugsystem 2 vor dem Verdichter 3 eingeleitet werden. Dem gegenüber werden im Turbobetrieb die Kurbelgehäuse-Entlüftungsgase über den ölabscheider 23 und die vierte Leitung 14 ebenfalls über das dritte Rückschlagventil 10 in das In contrast, FIG. 3 shows the internal combustion engine 1 according to the invention for turbo operation, ie when the compressor 3 compresses the combustion air upstream of the cylinders 1 ' . In this case, there is an overpressure in the combustion air intake system 2 after the compressor 3, which causes the tank ventilation gases via the tank vent valve 22 and the second check valve 9 in the direction of the nozzle 17 and from there via the third check valve 10 in the Verbrennungsluftansaugsystem second be introduced before the compressor 3. In contrast, in turbo mode the Crankcase ventilation gases via the oil separator 23 and the fourth line 14 also via the third check valve 10 in the
Verbrennungsluft-Ansaugsystem 2 vor dem Verdichter 3 eingeführt und von dort zusammen mit den Tankentlüftungsgasen weiter in Richtung Zylinder V befördert. Combustion air intake system 2 introduced in front of the compressor 3 and from there, together with the tank ventilation gases further transported in the direction of the cylinder V.
Figur 4 zeigt in einer Tabelle die Logik der Störsignalausgabe durch das Diagnosegerät 20. Ist ein Sensordruck gleich dem Modelldruck, so ist der Logikwert 1. Ist ein Sensordruck ungleich dem Modelldruck, so ist der Logikwert 0. FIG. 4 shows the logic of the interference signal output by the diagnostic device 20 in a table. If a sensor pressure equals the model pressure, the logic value is 1. If a sensor pressure is not equal to the model pressure, the logic value is 0.
Hieraus ergibt sich ein erster Systemzustand bei einem Sensordruck p1 = 1 und einem Sensordruck p2 = 1 keine Leckage, d. h. keine Störausgabe durch das Diagnosegerät 20. This results in a first system state at a sensor pressure p1 = 1 and a sensor pressure p2 = 1 no leakage, d. H. No spurious output by the diagnostic device 20.
Hieraus ergibt sich ein zweiter Systemzustand bei einem Sensordruck p1 = 0 und einem Sensordruck p2 = 0 Leckage nach der Saugstrahlpumpe, d. h. Störausgabe durch das Diagnosegerät 20. This results in a second system state at a sensor pressure p1 = 0 and a sensor pressure p2 = 0 leakage after the suction jet pump, d. H. Noise output by the diagnostic device 20.
Hieraus ergibt sich ein dritter Systemzustand bei einem Sensordruck p1 = 0 und einem Sensordruck p2 = 1 Leckage vor der Saugstrahlpumpe This results in a third system state at a sensor pressure p1 = 0 and a sensor pressure p2 = 1 leakage before the suction jet pump
(Tankentlüftungsseite), d. h. Störausgabe durch das Diagnosegerät 20. (Tank vent side), d. H. Noise output by the diagnostic device 20.
Nochmals die detaillierten Verfahren zur Ermittlung der Systemzustände: Again, the detailed procedures for determining the system states:
Verfahren 1 Method 1
• Starten der Brennkraftmaschine 1 , Starting the internal combustion engine 1,
• Messen eines ersten Sensordrucks mit dem ersten Drucksensor 18, Measuring a first sensor pressure with the first pressure sensor 18,
• Vergleich des ersten Sensordrucks mit einem ersten Modelldruck mit einem Diagnosegerät 20, • Auswerten, ob der Sensordruck von dem Modelldruck abweicht oder nicht, Comparison of the first sensor pressure with a first model pressure with a diagnostic device 20, • evaluate whether the sensor pressure deviates from the model pressure or not,
• Bei keiner Abweichung des Sensordrucks von dem Modelldruck, keine • With no deviation of the sensor pressure from the model pressure, none
Störsignalausgabe durch das Diagnosegerät 20, Noise signal output by the diagnostic device 20,
• Bei einer Abweichung des Sensordrucks von dem Modelldruck, eine • If the sensor pressure differs from the model pressure, a
Störsignalausgabe durch das Diagnosegerät 20. Noise signal output by the diagnostic device 20.
Verfahren 2 Method 2
• Messen des ersten und eines zweiten Sensordrucks mit dem ersten• Measuring the first and second sensor pressures with the first one
Drucksensor 18 und dem zweiten Drucksensor 19, Pressure sensor 18 and the second pressure sensor 19,
• Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und zweiten Modelldruck mit dem Diagnosegerät 20,  Comparing the first and the second sensor pressure with a first and second model pressure with the diagnostic device 20,
• Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht,  • Evaluate whether a sensor pressure deviates from the model pressure or not,
• Bei Abweichung des ersten Sensordrucks von dem ersten Modelldruck und des zweiten Sensordrucks von dem zweiten Modelldruck, Signalausgabe durch das Diagnosegerät 20, Leckage im  In case of deviation of the first sensor pressure from the first model pressure and the second sensor pressure from the second model pressure, signal output by the diagnostic device 20, leakage in the
Kurbelgehäuse-Entlüftungssystem 6.  Crankcase ventilation system 6.
Verfahren 3 Method 3
• Messen des ersten und des zweiten Sensordrucks mit dem ersten• Measuring the first and second sensor pressures with the first one
Drucksensor 18 und dem zweiten Drucksensor 19, Pressure sensor 18 and the second pressure sensor 19,
• Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und einem zweiten Modelldruck mit einem Diagnosegerät 20, Comparing the first and the second sensor pressure with a first and a second model pressure with a diagnostic device 20,
• Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht, • Evaluate whether a sensor pressure deviates from the model pressure or not,
• Bei einer Abweichung des ersten Sensordrucks von dem ersten  • If the first sensor pressure deviates from the first one
Modelldruck und keiner Abweichung des zweiten Sensordrucks von dem zweiten Modelldruck, Störausgabe durch das Diagnosegerät 20 Leckage im Tank-Entlüftungssystem 5. Model pressure and no deviation of the second sensor pressure from the second model pressure, spurious output by the diagnostic device 20 leakage in the tank ventilation system. 5
Bezugszeichenliste: LIST OF REFERENCE NUMBERS
1. Brennkraftmaschine 1st internal combustion engine
r Zylinder r cylinder
2. Verbrennungsluft-Ansaugsystem 2. combustion air intake system
3. Verdichter 3rd compressor
4. Drosselelement  4. throttle element
5. Tank-Entlüftungssystem  5. Tank ventilation system
6. Kurbelgehäuse-Entlüftungssystem 6. Crankcase ventilation system
7. erstes Rückschlagventil 7. first check valve
8. erste Leitung  8. first line
9. zweites Rückschlagventil 9. second check valve
10. drittes Rückschlagventil 10. third check valve
11. zweite Leitung  11. second line
11 ' zweite Teilleitung  11 'second sub-line
12. viertes Rückschlagventil 12. fourth check valve
13. dritte Leitung 13th third line
14. vierte Leitung  14th fourth line
15. fünftes Rückschlagventil 15th fifth check valve
16. fünfte Leitung 16th fifth lead
17. Düse  17th nozzle
18. erster Drucksensor  18. first pressure sensor
19. zweiter Drucksensor  19. second pressure sensor
20. Diagnosegerät  20. Diagnostic device
21. Tank  21. Tank
22. Tankentlüftungsventil  22. Tank vent valve
23. Ölabscheider  23. Oil separator
24. Luftfilter  24. Air filter

Claims

Patentansprüche  claims
1. Brennkraftmaschine (1 ) mit einem Verbrennungsluft-Ansaugsystem (2), in dem ein Verdichter (3) und in Strömungsrichtung einer 1. internal combustion engine (1) with a combustion air intake system (2), in which a compressor (3) and in the flow direction of a
Verbrennungsluft dahinter ein Drosselelement (4) angeordnet sind und mit einem Tank-Entlüftungssystem (5) und mit einem Kurbelgehäuse- Entlüftungssystem (6), wobei das Tank-Entlüftungssystem (5) über ein erstes Rückschlagventil (7) in einer ersten Leitung (8) mit dem  Behind a throttle element (4) are arranged and with a tank venting system (5) and with a crankcase ventilation system (6), wherein the tank venting system (5) via a first check valve (7) in a first line (8) with the
Ansaugsystem (2) nach dem Drosselelement (4) verbindbar ist und über ein zweites Rückschlagventil (9) in einer zweiten Leitung (11 ) und ein drittes (10) Rückschlagventil in einer zweiten Teilleitung ( 1') mit dem Ansaugsystem (2) vor dem Verdichter (3) verbindbar ist, wobei das Kurbelgehäuse-Entlüftungssystem (6) über ein viertes Rückschlagventil (12) in einer dritten Leitung (13) mit dem Ansaugsystem (2) nach dem Drosselelement (4) und über eine vierte Leitung (14) und das dritte Rückschlagventil (10) mit dem Ansaugsystem (2) vor dem Verdichter (3) verbindbar ist,  Intake system (2) after the throttle element (4) is connectable and via a second check valve (9) in a second line (11) and a third (10) check valve in a second part line (1 ') with the intake system (2) before the Compressor (3) is connectable, wherein the crankcase ventilation system (6) via a fourth check valve (12) in a third line (13) with the intake system (2) after the throttle element (4) and via a fourth line (14) and the third check valve (10) is connectable to the intake system (2) upstream of the compressor (3),
dadurch gekennzeichnet, dass das Ansaugsystem (2) nach dem  characterized in that the intake system (2) after the
Drosselelement (4) über ein fünftes Rückschlagventil (15) in einer fünften Leitung (16) mit der zweiten Leitung (11 ) an einem  Throttle element (4) via a fifth check valve (15) in a fifth line (16) with the second line (11) on a
Leitungsübergang zwischen der zweiten Leitung (11) und der zweiten Teilleitung (11 ') verbindbar ist, wobei an dem Leitungsübergang von der fünften Leitung (16) in die zweite Leitung (11) und die zweite Teilleitung (1 1 ') eine Düse (17) ausgebildet ist, in die die zweite Leitung (1 1) nach dem zweiten Rückschlagventil (9) mündet, wobei zwischen dem zweiten Rückschlagventil (9) und der Düse (17) in der zweiten Leitung (1 1) ein erster Drucksensor (18) zur Messung des Druckes in der zweiten Leitung (11) vorgesehen ist. Brennkraftmaschine nach Patentanspruch 1 , Conduit transition between the second line (11) and the second part line (11 ') is connectable, wherein at the line transition from the fifth line (16) in the second line (11) and the second part line (1 1'), a nozzle (17 ) is formed, into which the second line (1 1) after the second check valve (9) opens, wherein between the second check valve (9) and the nozzle (17) in the second line (1 1), a first pressure sensor (18) for measuring the pressure in the second line (11) is provided. Internal combustion engine according to claim 1,
dadurch gekennzeichnet, dass in der zweiten Teilleitung (111) oder der vierten Leitung (14) ein zweiter Drucksensor (19) vorgesehen ist. characterized in that in the second part line (11 1 ) or the fourth line (14), a second pressure sensor (19) is provided.
Brennkraftmaschine nach Patentanspruch 1 oder 2, Internal combustion engine according to claim 1 or 2,
dadurch gekennzeichnet, dass für eine Druckauswertung der characterized in that for a pressure evaluation of the
Drucksensoren (18, 19) ein Diagnosegerät (20) vorgesehen ist. Pressure sensors (18, 19) a diagnostic device (20) is provided.
Brennkraftmaschine nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, dass in der ersten Leitung (8) zwischen einem Tank (21) und dem ersten und dem zweiten Rückschlagventil (7, 9) ein Tankentlüftungsventil (22) vorgesehen ist. Internal combustion engine according to one of claims 1 to 3, characterized in that in the first line (8) between a tank (21) and the first and the second check valve (7, 9) a tank vent valve (22) is provided.
Brennkraftmaschine nach einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, dass zwischen dem vierten Rückschlagventil (12) und der vierten Leitung (14) ein zweites Drosselelement vorgesehen ist. Internal combustion engine according to one of the claims 1 to 4, characterized in that a second throttle element is provided between the fourth check valve (12) and the fourth line (14).
Verfahren zur Erkennung einer Leckage von dem Kurbelgehäuse- und/oder dem Tankentlüftungssystem nach einem der Patentansprüche 1 bis 5, A method of detecting leakage from the crankcase and / or tank venting system of any one of claims 1 to 5,
gekennzeichnet durch folgende Verfahrensschritte: characterized by the following process steps:
Starten der Brennkraftmaschine (1),  Starting the internal combustion engine (1),
Messen eines ersten Sensordrucks mit dem ersten Drucksensor Measuring a first sensor pressure with the first pressure sensor
(18), (18)
Vergleichen des ersten Sensordrucks mit einem ersten  Comparing the first sensor pressure with a first one
Modelldruck mit dem Diagnosegerät (20),  Model printing with the diagnostic device (20),
Auswerten, ob der Sensordruck von dem Modelldruck abweicht oder nicht,  Evaluate whether the sensor pressure deviates from the model pressure or not,
bei keiner Abweichung des Sensordrucks von dem Modelldruck, keine Störsignalausgabe durch das Diagnosegerät (20), bei Abweichung des Sensordrucks von dem Modelldruck, eine Störsignalausgabe durch das Diagnosegerät (20). with no deviation of the sensor pressure from the model pressure, no interference signal output by the diagnostic device (20), if the sensor pressure deviates from the model pressure, an interference signal output by the diagnostic device (20).
7. Verfahren nach Patentanspruch 6, 7. The method according to claim 6,
gekennzeichnet durch folgende Verfahrensschritte:  characterized by the following process steps:
Messen des ersten und eines zweiten Sensordrucks mit dem ersten Drucksensor (18) und dem zweiten Drucksensor (19),  Measuring the first and second sensor pressures with the first pressure sensor (18) and the second pressure sensor (19),
Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und einem zweiten Modelldruck mit dem Diagnosegerät (20), Comparing the first and the second sensor pressure with a first and a second model pressure with the diagnostic device (20),
Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht, Evaluate whether a sensor pressure deviates from the model pressure or not,
bei Abweichung des ersten Sensordrucks von dem ersten Modelldruck und des zweiten Sensordrucks von dem zweiten Modelldruck, Störsignalausgabe durch das Diagnosegerät (20) Leckage im Kurbelgehäuse-Entlüftungssystem (6).  if the first sensor pressure deviates from the first model pressure and the second sensor pressure deviates from the second model pressure, interference signal output by the diagnostic device (20) leaks in the crankcase ventilation system (6).
8. Verfahren nach Patentanspruch 6, 8. The method according to claim 6,
gekennzeichnet durch folgende Verfahrensschritte:  characterized by the following process steps:
Messen des ersten und des zweiten Sensordrucks mit dem ersten Drucksensor (18) und dem zweiten Drucksensor (19),  Measuring the first and second sensor pressures with the first pressure sensor (18) and the second pressure sensor (19),
Vergleichen des ersten und des zweiten Sensordrucks mit einem ersten und einem zweiten Modelldruck mit dem Diagnosegerät (20), Comparing the first and the second sensor pressure with a first and a second model pressure with the diagnostic device (20),
Auswerten, ob ein Sensordruck von dem Modelldruck abweicht oder nicht, Evaluate whether a sensor pressure deviates from the model pressure or not,
bei einer Abweichung des ersten Sensordrucks von dem ersten Modelldruck und keiner Abweichung des zweiten Sensordrucks von dem zweiten Modelldruck, Störsignalausgabe durch das  in a deviation of the first sensor pressure from the first model pressure and no deviation of the second sensor pressure from the second model pressure, noise signal output by the
Diagnosegerät (2) Leckage im Tank-Entlüftungssystem (5).  Diagnostic Device (2) Leakage in Tank Bleeder System (5).
EP16730333.8A 2015-07-24 2016-06-14 Internal combustion engine and method for determining a leakage of a crankcase and / or a tank bleeding system Active EP3325796B1 (en)

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DE102015213982.4A DE102015213982A1 (en) 2015-07-24 2015-07-24 Internal combustion engine and method for detecting leakage from a crankcase and / or tank venting system
PCT/EP2016/063587 WO2017016737A1 (en) 2015-07-24 2016-06-14 Internal combustion engine and method for detecting a leak from a crankcase and/or a tank ventilation system

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US10907591B2 (en) 2021-02-02
CN107532544B (en) 2019-09-20
US20180030937A1 (en) 2018-02-01
WO2017016737A1 (en) 2017-02-02
EP3325796B1 (en) 2018-11-07
DE102015213982A1 (en) 2017-01-26

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