EP0351521B1 - Crankcase ventilation - Google Patents
Crankcase ventilation Download PDFInfo
- Publication number
- EP0351521B1 EP0351521B1 EP89109354A EP89109354A EP0351521B1 EP 0351521 B1 EP0351521 B1 EP 0351521B1 EP 89109354 A EP89109354 A EP 89109354A EP 89109354 A EP89109354 A EP 89109354A EP 0351521 B1 EP0351521 B1 EP 0351521B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ventilation
- throttle
- connexion
- socket
- duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- F02M15/00—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture
- F02M15/02—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture with heating means, e.g. to combat ice-formation
- F02M15/022—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture with heating means, e.g. to combat ice-formation near to manually operated throttle valve
-
- 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
- F01M13/025—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction with an inlet-conduit via an air-filter
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- 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
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/002—Cooling
Definitions
- the invention relates to a crankcase ventilation according to the preamble of claim 1.
- DE-C-952 221 discloses a crankcase ventilation for an internal combustion engine, in which a ventilation line leads from the internal combustion engine to a throttle valve housing. Within this housing, the ventilation line branches off and, by means of a channel, leads it to a main ventilation point located upstream of a throttle valve and opening into the intake air flow, and by means of a further channel it leads to a secondary ventilation point opening downstream of the throttle valve.
- a heated throttle valve housing is known from FR-A-1 570 588, around which a pipe connected to the coolant circuit of the internal combustion engine is looped in the region of the throttle valve and a ventilation point.
- the object of the present invention is to provide a crankcase ventilation, which ventilates the crankcase in the air intake tract in normal load operation as well as in coasting or idling operation of the internal combustion engine, and in which icing of the ventilation points in the air intake tract is prevented.
- this object is achieved by the characterizing features of claim 1. Further features which advantageously design the invention are specified in the subclaims.
- the advantages of the invention can be seen in particular in the fact that the crankcase is vented in a simple manner at all positions of the throttle valve, and that icing of these points is achieved with it by the arrangement of an annular channel through which coolant flows in the immediate vicinity of the throttle valve and the venting points and the throttle valve is prevented.
- only one line, usually in the form of a hose is necessary for the supply of the crankcase gases into the throttle valve housing. This reduces component costs as well assembly and service costs.
- the throttle valve housing can be produced in one piece with all connections.
- An internal combustion engine 1 is supplied with fresh air through an air intake tract 2 .
- the fresh air is first conveyed by the internal combustion engine 1 through an intake port 3 and an air filter 4 .
- the fresh air flows through a pipe section 5 and then through a throttle valve housing 6 , in which an adjustable throttle valve 7 is arranged.
- the fresh air then flows into an air collector 8 and from there through suction pipes 9 into the combustion chambers of the internal combustion engine 1 .
- the internal combustion engine 1 has a crankcase ventilation point 10 , from which a ventilation line 11 leads to the throttle valve housing 6 and is fastened there to a connecting piece 12 .
- the end of the connecting piece 12 located within the throttle valve housing 6 is closed with a disk 13 .
- the disk 13 has two channels 14 , 15 penetrating it, channel 14 opening into the main ventilation point 16 and channel 15 opening into the secondary ventilation point 17 .
- the main ventilation point 16 is located upstream in front of the throttle valve 7 , the secondary ventilation point 17 downstream behind the throttle valve 7 .
- the channel 15 and the secondary ventilation point 17 have a significantly smaller cross-sectional area than the channel 14 and the main ventilation point 16 .
- throttle valve 7 is open.
- the air flowing through the air intake tract 2 has a lower pressure than the gases in the crankcase of the internal combustion engine 1 .
- This pressure drop conveys the crankcase gases through the ventilation line 11 from the internal combustion engine 1 to the throttle valve housing 6 . Due to the larger cross-sectional area of the main ventilation point 16 , the crankcase gases predominantly flow through this ventilation point 16 into the air intake tract 2 and are mixed there with the fresh air flowing in and fed to the internal combustion engine 1 .
- the cross-sectional areas of the channels 14 and 15 are dimensioned in such a way that the volume of crankcase gases produced can be safely removed.
- the throttle valve housing 6 is closed by the throttle valve 7 which is transverse to the direction of flow of the intake air.
- the throttle valve 7 separates the main ventilation point 16 from the secondary ventilation point 17 . Since the internal combustion engine 1 continues to try to promote fresh air through the air intake section 2 and the throttle valve 7 blocks the air intake 2, 7 lying part of the air intake tract 2 creates a strong negative pressure in the downstream of the throttle valve. This negative pressure sucks the crankcase gases through the channel 14 to the secondary ventilation point 17 .
- the outlet area of the secondary ventilation point 17 is dimensioned significantly smaller than that of the main ventilation point 16 , since the amount of crankcase gases occurring in overrun or idling operation is correspondingly small.
- an annular channel 18 is arranged, which is concentric with the throttle valve 7 and runs at a short distance from the connecting piece 12 and the channels 14 , 15 .
- This channel 18 is connected via an inlet 19 and an outlet 20 to the cooling water circuit of the internal combustion engine 1 .
- a thermostatic valve 21 which is inserted with an air temperature sensor 22 into the pipe section 5 of the intake tract 2 , regulates the coolant supply as a function of and within certain limits of the intake air temperature.
- the arrangement of the venting points 16 , 17 in the vicinity of the channel 18 also advantageously prevents these venting points 16 , 17 from icing up.
- the channels 14 , 15 are inexpensive to produce in the disc 13 as bores.
- the connecting piece 12 can alternatively be made in one piece with the disc 13 as a casting. To reduce the assembly effort, in a further embodiment of the invention the connecting piece 12 can be produced in one piece with the throttle valve housing 6 and the disk 13 as a cast part.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Exhaust Silencers (AREA)
Description
Die Erfindung betrifft ein Kurbelgehäuseentlüftung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a crankcase ventilation according to the preamble of
In der DE-C-952 221 ist eine Kurbelgehäuseentlüftung für eine Brennkraftmaschine offenbart, bei der eine Entlüftungsleitung von der Brennkraftmaschine zu einem Drosselklappengehäuse führt. Innerhalb dieses Gehäuses verzweigt sich die Entlüftungsleitung und führt mittels eines Kanal es zu einer stromauf einer Drosselklappe liegenden, in den Ansaugluftstrom mündenden Hauptentlüftungsstelle und mittels eines weiteren Kanal es zu einer stromab der Drosselklappe mündenden Nebenentlüftungsstelle.DE-C-952 221 discloses a crankcase ventilation for an internal combustion engine, in which a ventilation line leads from the internal combustion engine to a throttle valve housing. Within this housing, the ventilation line branches off and, by means of a channel, leads it to a main ventilation point located upstream of a throttle valve and opening into the intake air flow, and by means of a further channel it leads to a secondary ventilation point opening downstream of the throttle valve.
Aus der FR-A-1 570 588 ist ein beheiztes Drosselklappengehäuse bekannt, um welches im Bereich der Drosselklappe und einer Entlüftungsstelle ein an den Kühlmittelkreislauf der Brennkraftmaschine angeschlossenes Rohr geschlungen ist.A heated throttle valve housing is known from FR-A-1 570 588, around which a pipe connected to the coolant circuit of the internal combustion engine is looped in the region of the throttle valve and a ventilation point.
Aufgabe der vorliegenden Erfindung ist es, eine Kurbelgehäuseentlüftung zu schaffen, die in einfacher Weise das Kurbelgehäuse im normalen Lastbetrieb wie auch im Schub- oder Leerlaufbetrieb der Brennkraftmaschine in den Luftansaugtrakt entlüftet, und bei der eine Vereisung der Entlüftungsstellen im Luftansaugtrakt verhindert ist.
Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere, die Erfindung vorteilhaft ausgestaltende Merkmale sind in den Unteransprüchen benannt.
Die Vorteile der Erfindung sind insbesondere darin zu ersehen, daß mit ihr in einfacher Weise die Entlüftung des Kurbelgehäuses bei allen Stellungen der Drosselklappe gelingt und daß mit ihr durch die Anordnung eines von Kühlmittel durchströmten Ringkanals in unmittelbarer Nähe der Drosselklappe und der Entlüftungsstellen eine Vereisung dieser Stellen und der Drosselklappe verhindert ist. Weiterhin ist für die Zufuhr der Kurbelgehäusegase in das Drosselklappengehäuse lediglich eine, zumeist als Schlauch ausgeführte, Leitung notwendig. Dadurch sinken Bauteilkosten sowie der Montage- und Serviceaufwand. Ferner ist das Drosselklappengehäuse einteilig mit allen Anschlüssen herstellbar.The object of the present invention is to provide a crankcase ventilation, which ventilates the crankcase in the air intake tract in normal load operation as well as in coasting or idling operation of the internal combustion engine, and in which icing of the ventilation points in the air intake tract is prevented.
According to the invention, this object is achieved by the characterizing features of
The advantages of the invention can be seen in particular in the fact that the crankcase is vented in a simple manner at all positions of the throttle valve, and that icing of these points is achieved with it by the arrangement of an annular channel through which coolant flows in the immediate vicinity of the throttle valve and the venting points and the throttle valve is prevented. Furthermore, only one line, usually in the form of a hose, is necessary for the supply of the crankcase gases into the throttle valve housing. This reduces component costs as well assembly and service costs. Furthermore, the throttle valve housing can be produced in one piece with all connections.
Anhand der nachfolgenden Zeichnung, die schematisch eine Ausführung der Kurbelgehäuseentlüftung an einer Brennkraftmaschine zeigt, wird die Erfindung näher erläutert.
Eine Brennkraftmaschine 1 wird durch einen Luftansaugtrakt 2 mit Frischluft versorgt. Die Frischluft wird von der Brennkraftmaschine 1 zunächst durch einen Ansaugstutzen 3 und ein Luftfilter 4 gefördert. Vom Luftfilter 4 aus strömt die Frischluft durch ein Rohrstück 5 und danach durch ein Drosselklappengehäuse 6, in dem eine stellbare Drosselklappe 7 angeordnet ist. Anschließend strömt die Frischluft in einen Luftsammler 8 und von dort durch Saugrohre 9 in die Brennkammern der Brennkraftmaschine 1.
Die Brennkraftmaschine 1 hat eine Kurbelgehäuseentlüftungsstelle 10, von der aus eine Entlüftungsleitung 11 zum Drosselklappengehäuse 6 führt und dort an einem Anschlußstutzen 12 befestigt ist. Das innerhalb des Drosselklappengehäuses 6 liegende Ende des Anschlußstutzens 12 ist mit einer Scheibe 13 verschlossen. Die Scheibe 13 weist zwei sie durchdringende Kanäle 14, 15 auf, wobei Kanal 14 in die Hauptentlüftungsstelle 16 und Kanal 15 in die Nebenentlüftungsstelle 17 mündet. Die Hauptentlüftungsstelle 16 liegt stromaufwärts vor der Drosselklappe 7, die Nebenentlüftungsstelle 17 stromab hinter der Drosselklappe 7. Der Kanal 15 und die Nebenentlüftungsstelle 17 haben eine deutlich geringere Querschnittsfläche als der Kanal 14 und die Hauptentlüftungsstelle 16.
Im normalen Lastbetrieb der Brennkraftmaschine 1 ist die Drosselklappe 7 geöffnet. Die durch den Luftansaugtrakt 2 strömende Luft hat gegenüber den Gasen im Kurbelgehäuse der Brennkraftmaschine 1 einen geringeren Druck. Dieses Druckgefälle fördert die Kurbelgehäusegase durch die Entlüftungsleitung 11 von der Brennkraftmaschine 1 zum Drosselklappengehäuse 6. Aufgrund der größeren Querschnittsfläche der Hauptentlüftungsstelle 16 strömen die Kurbelgehäusegase überwiegend durch diese Entlüftungsstelle 16 in den Luftansaugtrakt 2 und werden dort mit der nachströmenden Frischluft vermischt und der Brennkraftmaschine 1 zugeführt. Die Querschnittsflächen der Kanäle 14 und 15 sind so bemessen, daß das anfallende Volumen von Kurbelgehäusegasen sicher abgeführt werden kann.The invention is explained in more detail with the aid of the following drawing, which schematically shows an embodiment of the crankcase ventilation on an internal combustion engine.
An
The
In normal load operation of
Wird die Brennkraftmaschine 1 im Schub- oder im Leerlauf betrieben, ist das Drosselklappengehäuse 6 durch die quer zur Strömungsrichtung der Ansaugluft stehende Drosselklappe 7 verschlossen. Die Drosselklappe 7 trennt dabei die Hauptentlüftungsstelle 16 von der Nebenentlüftungsstelle 17. Da die Brennkraftmaschine 1 weiterhin versucht, Frischluft durch den Luftansaugtrakt 2 zu fördern und die Drosselklappe 7 den Luftansaugtrakt 2 versperrt, entsteht in dem stromabwärts der Drosselklappe 7 liegenden Teil des Luftansaugtraktes 2 ein starker Unterdruck. Dieser Unterdruck saugt die Kurbelgehäusegase durch den Kanal 14 zur Nebenentlüftungsstelle 17. Die Austrittsfläche der Nebenentlüftungsstelle 17 ist deutlich geringer bemessen als die der Hauptentlüftungsstelle 16, da die im Schub- oder Leerlaufbetrieb anfallende Menge an Kurbelgehäusegasen entsprechend gering ist.
Im Drosselklappengehäuse 6 ist ein ringförmiger Kanal 18 angeordnet, der konzentrisch zur Drosselklappe 7 liegt und in geringem Abstand vom Anschlußstutzen 12 und den Kanälen 14, 15 verläuft. Dieser Kanal 18 ist über einen Zulauf 19 und einen Ablauf 20 an den Kühlwasserkreislauf der Brennkraftmaschine 1 angeschlossen. Da eine Vereisungsgefahr für die Drosselklappe 7 nur bei entsprechenden Außenlufttemperaturen besteht, regelt ein Thermostatventil 21, das mit einem Lufttemperaturfühler 22 in das Rohrstück 5 des Ansaugtraktes 2 eingesetzt ist, den Kühlmittelzulauf in Abhängigkeit und innerhalb bestimmter Grenzen der Ansauglufttemperatur. Vorteilhaft sind durch die Anordnung der Entlüftungsstellen 16, 17 in der Nähe des Kanals 18 auch die Vereisung dieser Entlüftungsstellen 16, 17 verhindert.
Die Kanäle 14, 15 sind in der Scheibe 13 kostengünstig als Bohrungen herstellbar.If the
In the throttle valve housing 6 an
The
Der Anschlußstutzen 12 kann als Alternative einteilig mit der Scheibe 13 als Gußteil hergestellt werden. Zur Verringerung des Montageaufwandes ist in einer weiteren Ausführung der Erfindung der Anschlußstutzen 12 einteilig mit dem Drosselklappengehäuse 6 und der Scheibe 13 als Gußteil herstellbar.The connecting
Claims (6)
- A crankcase ventilation for an internal-combustion engine (1), with a ventilation pipe (11) leading [from] the internal-combustion engine (1) to a connexion socket (12) of a throttle-valve casing (6) and with ducts (14, 15) arranged inside the throttle-valve casing (6), wherein one duct (15) leads to a main ventilation point (16) opening into an intake-air flow upstream of a throttle valve (7) and the duct (15) [sic] leads to a secondary ventilation point (17) situated downstream, characterized in that an annular duct (18), connected to a coolant circuit and heated thereby and extending in the vicinity of the connexion socket (12) and the two ventilation points (16, 17), is arranged in the throttle-valve casing (6), and the connexion socket (12) is inserted radially into the throttle-valve casing (6), the said connexion socket (12) being closed at its end situated in the throttle-valve casing (6) by a circular base (13) in which the duct (15) leading to the main ventilation point (16) and the duct (14) leading to the secondary ventilation point (17) are formed.
- A crankcase ventilation according to Claim 1, characterized in that the base (13) is constructed as a circular disc (13) which is connected to the connexion socket (12).
- A crankcase ventilation according to Claim 2, characterized in that the connexion socket (12) is constructed integrally with the base (13) as a cast component.
- A crankcase ventilation according to Claim 2 or 3, characterized in that the throttle-valve casing (6) is constructed integrally with the connexion socket (12) and the base (13) as a cast component.
- A crankcase ventilation according to one of Claims 2 to 4, characterized in that the ducts (14, 15) are constructed in the form of bores.
- A crankcase ventilation according to Claim 1, characterized in that the coolant feed (19) is regulated as a function of the intake-air temperature by a thermostat valve (21) inserted therein and inserted together with an air-temperature sensor (22) into the air-intake duct (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3824791 | 1988-07-21 | ||
DE3824791A DE3824791A1 (en) | 1988-07-21 | 1988-07-21 | CRANKCASE VENTILATION |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0351521A2 EP0351521A2 (en) | 1990-01-24 |
EP0351521A3 EP0351521A3 (en) | 1990-05-30 |
EP0351521B1 true EP0351521B1 (en) | 1993-08-11 |
Family
ID=6359228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89109354A Expired - Lifetime EP0351521B1 (en) | 1988-07-21 | 1989-05-24 | Crankcase ventilation |
Country Status (5)
Country | Link |
---|---|
US (1) | US4922882A (en) |
EP (1) | EP0351521B1 (en) |
JP (1) | JP2662441B2 (en) |
DE (2) | DE3824791A1 (en) |
SU (1) | SU1704642A3 (en) |
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US4102314A (en) * | 1977-03-30 | 1978-07-25 | Chrysler Corporation | Crankcase ventilation |
DE2949096C2 (en) * | 1979-12-06 | 1983-05-11 | Bosch und Pierburg System oHG, 4040 Neuss | Mixture formers for internal combustion engines |
JPS6270653A (en) * | 1985-09-24 | 1987-04-01 | Yamaha Motor Co Ltd | Exhaust gas purifying device for v-type engine |
DE3726332C1 (en) * | 1987-08-07 | 1988-06-23 | Bayerische Motoren Werke Ag | Intake pipe part of an internal combustion engine |
US4805564A (en) * | 1987-09-22 | 1989-02-21 | Sharon Manufacturing Company | Engine intake manifold assembly |
-
1988
- 1988-07-21 DE DE3824791A patent/DE3824791A1/en not_active Withdrawn
-
1989
- 1989-05-24 DE DE8989109354T patent/DE58905231D1/en not_active Expired - Fee Related
- 1989-05-24 EP EP89109354A patent/EP0351521B1/en not_active Expired - Lifetime
- 1989-07-06 SU SU894614453A patent/SU1704642A3/en active
- 1989-07-14 US US07/379,967 patent/US4922882A/en not_active Expired - Fee Related
- 1989-07-21 JP JP1187613A patent/JP2662441B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007062772A1 (en) | 2007-12-27 | 2009-07-02 | Baerlocher Gmbh | Fatty acid salt mixture as a water repellent for building materials |
WO2020249763A1 (en) | 2019-06-13 | 2020-12-17 | Baerlocher Gmbh | Hydrophobic additives for construction materials |
Also Published As
Publication number | Publication date |
---|---|
US4922882A (en) | 1990-05-08 |
SU1704642A3 (en) | 1992-01-07 |
JPH0267414A (en) | 1990-03-07 |
DE3824791A1 (en) | 1990-01-25 |
EP0351521A3 (en) | 1990-05-30 |
JP2662441B2 (en) | 1997-10-15 |
DE58905231D1 (en) | 1993-09-16 |
EP0351521A2 (en) | 1990-01-24 |
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