EP1624162A1 - Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé - Google Patents

Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé Download PDF

Info

Publication number
EP1624162A1
EP1624162A1 EP04103757A EP04103757A EP1624162A1 EP 1624162 A1 EP1624162 A1 EP 1624162A1 EP 04103757 A EP04103757 A EP 04103757A EP 04103757 A EP04103757 A EP 04103757A EP 1624162 A1 EP1624162 A1 EP 1624162A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal separator
crankcase
internal combustion
combustion engine
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP04103757A
Other languages
German (de)
English (en)
Inventor
Kai Kuhlbach
Carsten Weber
Richard Fritsche
Johannes Dresen-Rausch
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.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP04103757A priority Critical patent/EP1624162A1/fr
Publication of EP1624162A1 publication Critical patent/EP1624162A1/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
    • F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
    • 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
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • F01M2013/0427—Separating oil and gas with a centrifuge device the centrifuge device having no rotating part, e.g. cyclone

Definitions

  • the invention relates to a method for venting a crankcase of an internal combustion engine, which has a cylinder block, a cylinder head and at least one cover, for example a valve cover.
  • the invention relates to an internal combustion engine for carrying out such a method, which has a crankcase, a cylinder block, a cylinder head, at least one cover, for example a valve cover, an engine mount, and an intake manifold as components.
  • a method of the above type is used to vent the crankcase and prevents the pressure that builds up in the crankcase during operation of the internal combustion engine, undesirably high values.
  • the piston of each cylinder of an internal combustion engine is axially movably guided in a cylinder tube and limits together with the cylinder tube and the cylinder head the combustion chamber of a cylinder.
  • the piston crown forms part of the combustion chamber inner wall and seals together with the piston rings from the combustion chamber against the crankcase, so that no combustion gases or combustion air enter the crankcase and no oil enters the combustion chamber.
  • the piston is equipped according to the prior art for receiving piston rings on its outer circumferential surface with annular grooves, wherein the piston rings extend almost over the entire circumference of the piston.
  • Part of the oil in the crankcase mixes in the form of a fine oil mist with the gases in the crankcase. This is supported by the crankshaft rotating in the oil sump of the crankcase, which contributes to additional foaming of the oil.
  • the prior art method for venting the crankcase are used, the problem with the vent is in particular that the gases in the crankcase are contaminated with oil. Consequently, it is not expedient to provide the crankcase only with ventilation openings, via which a pressure equalization can take place. Rather, the venting stream leaving the crankcase must be separated from the liquid constituents present in the venting stream, in particular the oil. In this case, the separated and recovered oil is preferably returned to the crankcase, whereas the purified vent stream is preferably supplied to the intake tract of the internal combustion engine, in turn to participate in the combustion.
  • European Patent Application EP 0 591 737 A1 discloses an internal combustion engine having a crankcase and a cylinder head, the cylinder head being fixedly connected to the crankcase by means of cylinder head bolts.
  • the cylinder head on through holes through which the cylinder head bolts are passed to be screwed into corresponding to the through holes tapped holes which are arranged in the crankcase, to be screwed.
  • channels are provided in the cylinder head and in the crankcase, which run parallel to the through holes and the threaded holes and open into the crankcase.
  • at least one channel for venting the crankcase, for which purpose this venting channel is connected by means of a connecting channel in the cylinder head with a through hole.
  • the vent channel directs the emerging from the crankcase and contaminated with oil venting stream through the through hole in a provided at the end of this through hole calming chamber in which a part of the oil is deposited, and then via another line in the intake manifold of the internal combustion engine to from there the Incineration to be supplied.
  • a disadvantage of the method for venting the crankcase described in EP 0 591 737 A1 is that the method is a passive method. That means that the separation of the gaseous and the liquid components of the venting stream is not actively supported, which is why the efficiency of the oil separation is low.
  • the vent flow is effectively left to itself, with a separation of the oil is achieved only by utilizing fluidic effects. In this case, a part of the oil should precipitate on the walls of the vent line or condense in the settling chamber.
  • the vent flow supplied to the intake manifold is still highly contaminated with oil.
  • the oil present in the bleed stream provides a noticeable increase in pollutant emissions when the bleed stream is sent to combustion and burns the oil.
  • a remedy here can be the use of an active separation device, which is to be provided as an additional unit.
  • separation devices are, for example, oil separation systems, which according to the cyclone principle d. H. working with the use of centrifugal force.
  • These ⁇ labscheidesysteme be arranged as an additional separate assembly on the internal combustion engine, the contaminated venting stream, the purified venting stream and the separated oil via lines, especially hoses, or the like communicate with the internal combustion engine.
  • Another object of the present invention is to provide an internal combustion engine for carrying out such a method, which is equipped with a crankcase, a cylinder block, a cylinder head, at least one cover, such as a valve cover, an engine mount, and an intake manifold as components, and in particular - in comparison with conventional internal combustion engines - has an optimized ventilation of the crankcase and at the same time has only a small additional space requirement.
  • the first sub-task is solved by a method for venting a crankcase of an internal combustion engine, which has a cylinder block, a cylinder head and at least one cover, such as a valve cover, in which the crankcase with at least one integrated in the internal combustion engine Centrifugal separator is connected so that a contaminated with oil vent flow is passed as a result of a pressure gradient from the crankcase to the centrifugal separator, and the vent flow of a separation chamber of the at least one centrifugal - is fed tangentially - to form a circular circulating flow, so that the liquid components contained in the vent flow ,
  • the oil are deposited as a result of centrifugal force, and these separated liquid components are then separated from the gaseous components of the vent flow, on the one hand, the separated liquid components are discharged by utilizing the acceleration of gravity from the deposition chamber and evacuated on the other hand, the gaseous components from the deposition chamber become.
  • At least one centrifugal separator is integrated in the internal combustion engine, integration in the context of the present invention being understood and interpreted as meaning that the centrifugal separator is not externally d as a separate unit.
  • H. is arranged as an additional accessory in addition to the internal combustion engine, but all functional surfaces of the centrifugal separator are formed by means of existing components of the internal combustion engine. How this is done in detail, will be described below in connection with the internal combustion engine according to the invention.
  • an integrated centrifugal separator does not lead to an increased space requirement, so that the internal combustion engine according to the invention, together with the necessary ancillary components, is of the same construction volume in comparison to conventional internal combustion engines. This supports the aim of the designers, in the engine compartment of the motor vehicle as effective as possible d. H. to realize tight packaging of the entire drive unit.
  • connection of the crankcase with the centrifugal separator can also be integrated into the internal combustion engine, so that supply lines, especially in the form of hoses, as required in conventional internal combustion engines with external separation devices are avoided.
  • the leakage susceptibility of the entire system is thereby lowered significantly.
  • the cost can be reduced, on the one hand, the manufacturing costs but also the assembly costs, in particular by reducing the number of components, are reduced.
  • the inventive method has a high efficiency with respect to the cleaning of the vent flow, as with the centrifugal separator, an active separation device is used, which actively supports the separation or separation of the liquid components, in particular of the oil, from the gaseous components of the venting stream.
  • the contaminated with oil venting stream which flows as a result of a pressure gradient from the crankcase to the centrifugal separator, the centrifugal separator or a so-called deposition chamber of the centrifugal separator is supplied tangentially.
  • the venting stream is then separated into its two phases, namely on the one hand the liquid phase and on the other hand, the gaseous phase. Both phases can be removed separately from the separation chamber.
  • the inventive method thus the first object of the invention is based, that is to show a method for venting an internal combustion engine, with which the known from the prior art disadvantages are overcome, and which in particular a high efficiency in the cleaning of the venting stream under only low cost
  • Embodiments of the method in which the at least one centrifugal separator is at least partially in the valve cover and / or the cylinder head are advantageous and / or the cylinder block is integrated, wherein the crankcase and the at least one centrifugal separator via a chain box and the valve cover are interconnected, so that the vent flow from the crankcase via the chain case and the valve cover is passed into the at least one centrifugal separator.
  • This variant of the method advantageously uses existing components to form the connection between the crankcase and centrifugal separator.
  • valve cover on the one hand provided for covering the camshaft and the valve trains valve cover is used, which has the task from home to seal the said components and component groups oil-tight to the environment and to protect against contamination.
  • the realized on the basis of these functions already in the valve bonnet technical characteristics, in particular the oil tightness are used according to the invention to direct the vent flow as free of leakage from the crankcase to the centrifugal, without the valve cover would have to be constructively changed in view of this additionally assigned their task.
  • the chain case extends close to the crankcase, so that the vent flow can be conducted from the crankcase into the chain case and at the other end of the chain case in the area of the camshaft drive into the valve cover. From here it is fed to the at least one centrifugal separator.
  • the at least one centrifugal separator is at least partially integrated into the valve cover and / or the cylinder head and / or the cylinder block.
  • the valve cover is usually a plastic part produced by the injection molding process, so that at least part of the functional surfaces of the centrifugal separator can be integrated by appropriate shaping in the valve cover already in the production of the valve cover.
  • functional surfaces can be incorporated into the cylinder head and the cylinder block, which are basically also castings.
  • only corresponding molds or cores are required in the production, which can realize functional surfaces of the centrifugal separator.
  • centrifugal separator along a vertical d. H. can be arranged substantially in the direction of gravitational acceleration in the engine block, so that the separated oil can be discharged by utilizing the gravitational acceleration of the deposition chamber.
  • the bleed stream can be used to lubricate the camshaft timing gear, camshaft and valve trains.
  • embodiments of the method are also advantageous in which the at least one centrifugal separator is at least partially integrated in the valve cover and / or the cylinder head and / or the cylinder block, wherein the crankcase and the at least one centrifugal separator via a riser, at least partially in the valve cover and / or the cylinder head and / or the cylinder block are connected to each other, so that the vent flow is passed from the crankcase via the riser into the at least one centrifugal separator.
  • crankcase is connected by means of a riser with the at least one centrifugal separator.
  • This riser is characterized by its short flow paths, which is particularly advantageous in cases where there is only a slight pressure gradient between the crankcase and centrifugal separator to promote the vent flow.
  • Embodiments of the method are advantageous in which the at least one centrifugal separator is connected by means of a line to a vacuum source in order to evacuate the gaseous constituents of the vent flow from the deposition chamber.
  • This embodiment utilizes the fact that there is a negative pressure at several points in an internal combustion engine in operation. This vacuum is used to evacuate the gaseous components by connecting the deposition chamber to the vacuum source. There are no additional measures required to remove the gaseous phase of the vent flow to the separator. The promotion is due to a pressure gradient between the deposition chamber and vacuum source.
  • Embodiments of the method in which the at least one centrifugal separator is connected by means of a line to an intake tract of the internal combustion engine are advantageous in order to evacuate the gaseous constituents of the venting stream from the deposition chamber, wherein the line is preferably connected to the intake tract downstream of a throttle valve arranged in the intake tract becomes.
  • This embodiment of the method is advantageous because the gaseous phase is evacuated not only without further action as a result of an already prevailing pressure gradient, but also because the gaseous phase of the venting stream is fed together with additional combustion air or fresh fuel-air mixture combustion and disposed of advantageously in this way.
  • This variant of the method is particularly advantageous because the oil contained in the vent flow can not be completely separated from the gaseous constituents, even when using an active precipitator, so that the gaseous phase of the vent flow has an unavoidable residual fraction of oil even after passing through the precipitator and thus unsuitable for being fired directly into the environment. A slight increase in pollutant emissions due to combustion of the oil is accepted.
  • a first valve is provided in the line to the vacuum source, with which the evacuation of the gaseous components from the deposition chamber is controlled.
  • the line to the vacuum source for example, be closed when the pressure gradient between the deposition chamber and vacuum source for a promotion of the purified vent flow is too low.
  • a venting of the deposition chamber can thus be selectively controlled, but in particular also be laid on operating conditions in which a vent offers. If, on the other hand, the pressure gradient is too great, the flow resistance of the pipe can be increased with the aid of the valve.
  • the valve can also be closed in operating conditions in which an increased pollutant emissions due to oil combustion is undesirable.
  • driving conditions or operating states of the internal combustion engine are conceivable in which a return flow starting from the negative pressure source in the direction of the deposition chamber is to be feared, as may occur, for example, during pushing operation.
  • embodiments of the method are advantageous in which the valve is opened when the pressure in the deposition chamber is higher than the pressure of the vacuum source, and the valve is closed when the pressure in the deposition chamber is lower than the pressure of the vacuum source.
  • the deposition chamber tapers in the direction of a discharge opening for the liquid ingredients.
  • the deposition chamber is preferably cylindrical in its basic form, which supports the circulating cyclone flow.
  • the tapered portion of the chamber is preferably in the shape of a truncated cone so that the radius of the tangential tangential flow steadily decreases as it enters the conical section, thereby increasing the centrifugal forces acting on the oil droplets still in the purge stream the efficiency of cleaning by additional deposits of oil further increased.
  • a centrifugal separator which has a subsequent to the deposition chamber calming chamber.
  • the settling chamber also serves as a reservoir for the separated oil and gives the opportunity with the oil in the settling chamber gaseous components of the venting flow to escape back into the deposition chamber.
  • the second sub-task on which the invention is based is achieved by an internal combustion engine which has a crankcase, a cylinder block, a cylinder head, at least one cover, for example a valve cover, an engine mount, and an intake tract as components, and which is characterized in that at least provided with a Abscheidehunt centrifugal separator is provided, which is integrated in such a way in the internal combustion engine, that all walls of the at least one centrifugal separator are formed by components of the internal combustion engine, wherein a first connection of the crankcase is provided with the at least one centrifugal separator, through which from the crankcase and contaminated with oil venting stream is passed into the at least one centrifugal separator to separate the liquid components and to separate from the gaseous components of the venting stream.
  • a first connection of the crankcase is provided with the at least one centrifugal separator, through which from the crankcase and contaminated with oil venting stream is passed into the at least one centrifugal separator to separate the liquid components and to
  • the functional surfaces of the at least one centrifugal separator are basically all components that are already present in a conventional internal combustion engine according to the prior art.
  • the crankcase, the cylinder block, the cylinder head, covers of any kind, such as the valve cover, engine mounts, parts of the intake manifold or the oil filter housing and the like are suitable.
  • Preferably own manufactured by casting process parts They offer the greatest potential for integration, whereby parts produced by injection molding as well as sand casting, but also parts produced by the so-called lost foam process, are suitable.
  • the parting planes can be selected in an advantageous manner, which will become clear in connection with the description of the figures.
  • Embodiments of the internal combustion engine in which the at least one centrifugal separator is at least partially integrated in the valve cover and / or the cylinder head and / or the cylinder block are advantageous.
  • the main advantages have already been mentioned in connection with the method according to the invention.
  • the valve cover is usually a plastic part produced by injection molding and the cylinder block and the cylinder head sand cast components, which is why these components include the above-mentioned - preferably to be used - components.
  • these components are also suitable for the formation of at least one centrifugal separator, because they allow the integration of the necessary channels in the internal combustion engine in addition to the integration of the separator, so allow training these channels without external supply lines, especially hose connections, would be necessary.
  • This advantage, the functional integration basically offer all components that are arranged between the crankcase and Einlass Thermal
  • Embodiments of the internal combustion engine in which the crankcase and the at least one centrifugal separator are connected to one another by means of a chain box and a valve cover are advantageous, so that the vent flow from the crankcase can be introduced into the at least one centrifugal separator through the chain case and the valve cover
  • crankcase and the at least one centrifugal separator are connected to each other by means of a riser, wherein the riser is at least partially disposed in the valve cover and / or the cylinder head and / or the cylinder block, so that the vent flow from the Crankcase is introduced through the riser in the at least one centrifugal separator.
  • a riser connection is particularly suitable if the internal combustion engine has no chain case, which could be used to connect the crankcase with the at least one centrifugal separator.
  • the riser is also characterized by short flow paths, so that the vent flow does not need to travel too far to the at least one centrifugal separator, which also offers advantages, if only a small Overpressure in the crankcase to promote the contaminated with oil venting current is available or available.
  • the riser preferably has a rectilinear course, so that - if at all - only small amounts of oil are deposited on the way from the crankcase to the at least one centrifugal and also the connection between the crankcase and centrifugal only a small flow resistance for the venting flow, which ensures a vent even with a slight overpressure in the crankcase.
  • Embodiments of the internal combustion engine in which the at least one centrifugal separator is connected by means of a line to a vacuum source are advantageous in order to evacuate the gaseous constituents of the venting stream from the separating chamber.
  • Embodiments of the internal combustion engine in which the at least one centrifugal separator is connected by means of a line to the intake tract of the internal combustion engine are advantageous in order to evacuate the gaseous components of the venting stream from the deposition chamber. Even after passing through the separator, the venting stream is more or less contaminated with oil, so that it is advantageous from an ecological point of view to supply this gas stream to the combustion and burn it and not to conduct it into the environment.
  • Embodiments of the internal combustion engine in which the line opens downstream of a throttle flap arranged in the intake tract into the intake tract are advantageous.
  • This embodiment of the internal combustion engine makes use of the fact that - especially in the partial load range - a pressure gradient across the more or less closed throttle valve, wherein behind the throttle valve. downstream of the throttle there is a negative pressure.
  • a valve in which in the line to the vacuum source, a valve is provided, with which the evacuation of the gaseous components from the deposition chamber is controlled.
  • the valve serves - as already on outlined above - including the prevention of backflow from the intake into the at least one centrifugal separator, which not only makes evacuation difficult or impossible, but also increase the mass of air contaminated with oil, since the back flowing in the at least one centrifugal separator Air or the returning fuel-air mixture would mix with oil in the separator.
  • Embodiments of the internal combustion engine in which the at least one centrifugal separator is equipped with a separation chamber which tapers in the direction of a discharge opening for the liquid constituents are advantageous. This serves to reduce the radius of the trajectory of the oil droplets and thus the increase of the centrifugal forces acting on the oil droplets contained in the vent flow, whereby the deposition process is supported. The efficiency of the cleaning process and the degree of purity of the vent flow is thereby increased.
  • Embodiments of the internal combustion engine in which the at least one centrifugal separator is equipped with a calming chamber adjoining the separation chamber are advantageous.
  • the at least one centrifugal separator is equipped with a second valve, with which the discharge of the liquid components is controlled.
  • the valve is preferably located behind the settling chamber so that oil can be removed from the settling chamber by opening the valve.
  • Embodiments of the internal combustion engine in which a second connection of the crankcase to the at least one centrifugal separator is provided, which serves to return the separated liquid constituents to the crankcase, are advantageous.
  • Figure 1 shows schematically a section of a first embodiment of the internal combustion engine according to the invention in cross section.
  • the internal combustion engine has a valve cover 3, a cylinder head 4 and a cylinder block 5.
  • the valve cover 3 serves to cover the camshaft and the valve trains (not shown) and has the task to seal these groups of components oil-tight against the environment and to protect against contamination.
  • the valve cover 3 is connected to the cylinder head 4, wherein a separating plane 17 is formed between the valve cover 3 and the cylinder head 4.
  • the cylinder head 4 is connected to form a further parting plane 18 with the cylinder block 5.
  • the already existing components namely the valve cover 3, the cylinder head 4 and the cylinder block 5 are used in an advantageous manner to integrate two centrifugal 1 a, 1 b in the internal combustion engine.
  • all the walls or functional surfaces of the centrifugal separators 1a, 1b are formed by the already existing components of the internal combustion engine.
  • Each centrifugal separator 1a, 1b is provided with a separation chamber 8a, 8b into which a vent stream coming from the crankcase and contaminated with oil is passed to separate the liquid components 15a, 51b, in particular the oil, and the gaseous components 16a, 16b to separate the vent flow.
  • the crankcase is connected, for example via a chain case (not shown) and the valve cover 3 with the deposition chambers 8a, 8b.
  • Figure 1 is a section this connection in the form of a first, arranged in the valve cover 3 connecting line 2a, 2b and a feed channel 2a, 2b visible.
  • valve cover 3 The already realized in the valve cover 3 technical features, in particular the oil seal, are used to conduct the vent flow as free of leakage from the crankcase to centrifugal 1a, 1b, without the valve cover 3 would have to be structurally changed in view of this additionally assigned task.
  • the bleed stream can be used to lubricate the camshaft timing gear, camshaft and valve trains.
  • the venting stream is then separated into its two phases, namely, on the one hand, the liquid phase 16a, 16b and, on the other hand, the gaseous phase 15a, 15b. Both phases can be removed separately from the deposition chambers 8a, 8b.
  • the gaseous components 15a, 15b or the purified air streams 16a, 16b evacuated via vacuum lines 12a, 12b up from the deposition chambers 8a, 8b, whereas the deposited liquid components 16a, 16b taking advantage of the gravitational acceleration down from the Separating chambers 8a, 8b are discharged.
  • Each separation chamber 8a, 8b tapers in the direction of the discharge opening 19a, 19b, wherein the tapered portion 9a, 9b of the chambers 8a, 8b - as shown in Figure 1 - preferably has the shape of a truncated cone, so that the radius of the rotating tangential flow 11 a, 11 b when entering the conical section 9a, 9b steadily reduced, whereby the centrifugal forces acting on the oil droplets still in the exhaust flow, are increased, which further increases the efficiency of cleaning by additional deposits of oil.
  • the oil flow 15a, 15b passes via the discharge openings 19a, 19b into settling chambers 10a, 10b, where the oil is collected.
  • the crankcase There is a second connection of the crankcase with the centrifugal separator 1a, 1b and the settling chamber 10a, 10b provided, which serves as a discharge channel 13a, 13b for discharging and returning the separated liquid components 15a, 15b in the crankcase.
  • the parting plane 17 between the valve cover 3 and cylinder head 4 on the one hand and the parting plane 18 between the cylinder head 4 and cylinder block 5 on the other hand with regard to the training of Functional surfaces of centrifugal separators 1a, 1b used in an advantageous manner.
  • the first parting plane 17 is specifically arranged where the conical section 9a, 9b of the deposition chamber 8a, 8b merges into the cylindrical section, which is preferable from casting technical points of view, since otherwise undercuts would be to be feared with complex Gußkern Modellen.
  • the second parting plane 18 is provided where the calming chambers 10a, 10b end and pass into the discharge channels. This ensures that the calming chambers 10a, 10b are easily accessible at a position of their largest diameter, which in turn offers advantages of casting technology.
  • FIG. 2 shows schematically the first embodiment shown in Figure 1 in longitudinal section.
  • the discharge of the purified air stream 16a is shown here.
  • the separation chamber 8a is connected by means of a vacuum line 12a to a vacuum source, preferably to the intake tract of the internal combustion engine. Otherwise, reference is made to FIG. 1.
  • the same reference numerals have been used for the same components.
  • Figure 3a shows schematically and in plan view a second embodiment in the longitudinal direction cut.
  • the contaminated with oil vent flow flows through the chain case 7 and arranged in the valve cover 3 feed channel 2a from the crankcase to the centrifugal separator 1a.
  • the vent flow of the deposition chamber 8a is supplied tangentially, so that in the deposition chamber 8a a revolving tangential flow 11a is formed.
  • the plunger 21 of the valve trains and on the other hand, the intake manifold 22 are arranged.
  • FIG. 3b schematically shows the second embodiment shown in FIG. 3a along the section line A-A marked in FIG. 3a.
  • the contaminated with oil vent flow passes through the feed channel 2a in the deposition chamber 8a.
  • a circumferential tangential flow 11a is formed, wherein the liquid components contained in the vent flow 15a, in particular the oil, are deposited as a result of the centrifugal forces, so that two phases, namely on the one hand, the liquid phase or the oil and on the other hand, the gaseous phase available.
  • the gaseous constituents 16a are removed as purified air stream 16a via a vacuum line 12a upwards out of the separation chamber 8a.
  • the separated liquid components 15a are discharged by utilizing the acceleration of gravity down from the deposition chamber 8a.
  • the deposition chamber 8a initially tapers in the direction of the discharge opening 19a and forms a conical section 9a, as a result of which the centrifugal forces which act on the oil droplets still present in the deaeration stream are increased.
  • the oil flow 15a passes through the discharge ports 19a from the deposition chamber 8a into the settling chamber 10a, where the oil is collected.
  • a discharge channel 13a in which a second valve 14a is arranged, the separated liquid components 15a are discharged into the crankcase.
  • the centrifugal separator 1 a is integrated into the valve cover 3 and the cylinder head 4.
  • the cylinder block is not used for integration.
  • the parting plane 17 between the valve cover 3 and the cylinder head 4 is used to facilitate the formation of the functional surfaces of the centrifugal separator 1a in an advantageous manner that is provided at a suitable location.
  • the valve cover 3 is modular, ie in the present case in two parts, wherein the valve cover 3 has a lower valve cover 3 'and an upper valve cover 3 ", which also supports the formation of the separation device.
  • the first parting plane 17 in the structure of the centrifugal separator 1a is specifically arranged at the upper end of the settling chamber 10a, which is preferable from casting technical points of view. This ensures that the settling chamber 10a is easily accessible at a location of its largest diameter.
  • the Abscheidehunt 8 a with its conical portion 9 a is disposed completely in the valve cover 3 and can be produced in a simple manner, since the valve cover 3 is formed in two parts and the Abscheidehunt 8 a in the open state of the valve cover 3 i. in the disassembled state, the valve cover 3 is accessible.
  • the parting planes 17, 18 are provided with O-rings 23, so that a sufficient sealing function is ensured both in the parting plane 17 between the valve cover 3 and cylinder head 4 and in the parting plane 18 between the cylinder head 4 and cylinder block.
  • Figure 4a shows schematically and in plan view a third embodiment which is cut along the longitudinal direction.
  • FIG. 4b shows this third embodiment along the section line B - B marked in FIG. 4a.
  • this third embodiment has a riser 20 to connect the crankcase and the at least one centrifugal separator 1a together. Only the differences from the embodiment shown in FIGS. 3a and 3b will be discussed, for which reason reference is made to FIGS. 3a and 3b. The same reference numerals have been used for the same components.
  • the riser 20 is partially integrated in the valve cover 3 and the cylinder head 4 and leads through the cylinder block to the crankcase (not shown).
  • the vent flow can be passed in this way through the riser 20 into the centrifugal separator 1a.
  • the bleed stream flowing through the riser 20 is fed tangentially to the centrifugal separator. The deposition or the separation of the liquid from the gaseous phase then takes place as already described in detail above.
  • the riser 20 is characterized by short flow paths and provides only a low flow resistance for the vent flow, so that a vent is ensured even if only a slight overpressure in the crankcase to promote the contaminated with oil vent flow is available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP04103757A 2004-08-04 2004-08-04 Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé Ceased EP1624162A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04103757A EP1624162A1 (fr) 2004-08-04 2004-08-04 Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04103757A EP1624162A1 (fr) 2004-08-04 2004-08-04 Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé

Publications (1)

Publication Number Publication Date
EP1624162A1 true EP1624162A1 (fr) 2006-02-08

Family

ID=34929422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04103757A Ceased EP1624162A1 (fr) 2004-08-04 2004-08-04 Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé

Country Status (1)

Country Link
EP (1) EP1624162A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009209A1 (de) * 2006-02-22 2007-03-15 Elringklinger Ag Ölfunktionseinheit
US9388764B2 (en) 2013-02-20 2016-07-12 Elringklinger Ag Valve cover
CN108301935A (zh) * 2018-03-28 2018-07-20 潍柴动力股份有限公司 油气分离器壳体及柴油车

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828256A1 (de) * 1978-06-28 1980-01-03 Daimler Benz Ag Vorrichtung zur entlueftung des kurbelwellengehaeuses einer brennkraftmaschine
DE3152747A1 (de) * 1981-07-18 1983-06-30 Bayerische Motoren Werke Ag Zyklonoelabscheider
US4825818A (en) * 1987-03-30 1989-05-02 Suzuki Jidosha Kogyo Kabushiki Kaisha Breather apparatus and cam chain tensioner adjuster apparatus in four-cycle engine
EP0591737A1 (fr) * 1992-10-09 1994-04-13 FIAT AUTO S.p.A. Dispositif de ventilation des gaz de fuite du carter d'un moteur à combustion interne
JPH10220215A (ja) * 1997-02-12 1998-08-18 Kubota Corp エンジンのブリーザ装置
US20010054418A1 (en) * 2000-05-24 2001-12-27 Burgess Stephen F. Safety shut-off valve for crankcase emission control system
US20020000224A1 (en) * 2000-02-29 2002-01-03 Rudolf Tscherne Four stroke engine having blow-by ventilation system and lubrication system
US20020100465A1 (en) * 2000-05-30 2002-08-01 Sieghard Pietschner Device to deoil the crankcase ventilation gases of an internal combustion engine
US20030024512A1 (en) * 2001-08-06 2003-02-06 Honda Giken Kogyo Kabushiki Kaisha Air-oil separating apparatus for engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2828256A1 (de) * 1978-06-28 1980-01-03 Daimler Benz Ag Vorrichtung zur entlueftung des kurbelwellengehaeuses einer brennkraftmaschine
DE3152747A1 (de) * 1981-07-18 1983-06-30 Bayerische Motoren Werke Ag Zyklonoelabscheider
US4825818A (en) * 1987-03-30 1989-05-02 Suzuki Jidosha Kogyo Kabushiki Kaisha Breather apparatus and cam chain tensioner adjuster apparatus in four-cycle engine
EP0591737A1 (fr) * 1992-10-09 1994-04-13 FIAT AUTO S.p.A. Dispositif de ventilation des gaz de fuite du carter d'un moteur à combustion interne
JPH10220215A (ja) * 1997-02-12 1998-08-18 Kubota Corp エンジンのブリーザ装置
US20020000224A1 (en) * 2000-02-29 2002-01-03 Rudolf Tscherne Four stroke engine having blow-by ventilation system and lubrication system
US20010054418A1 (en) * 2000-05-24 2001-12-27 Burgess Stephen F. Safety shut-off valve for crankcase emission control system
US20020100465A1 (en) * 2000-05-30 2002-08-01 Sieghard Pietschner Device to deoil the crankcase ventilation gases of an internal combustion engine
US20030024512A1 (en) * 2001-08-06 2003-02-06 Honda Giken Kogyo Kabushiki Kaisha Air-oil separating apparatus for engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 13 30 November 1998 (1998-11-30) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009209A1 (de) * 2006-02-22 2007-03-15 Elringklinger Ag Ölfunktionseinheit
US9388764B2 (en) 2013-02-20 2016-07-12 Elringklinger Ag Valve cover
DE102013202762B4 (de) 2013-02-20 2022-01-13 Elringklinger Ag Ventilhaube
CN108301935A (zh) * 2018-03-28 2018-07-20 潍柴动力股份有限公司 油气分离器壳体及柴油车
CN108301935B (zh) * 2018-03-28 2024-02-20 潍柴动力股份有限公司 油气分离器壳体及柴油车

Similar Documents

Publication Publication Date Title
DE602004006659T2 (de) Vorrichtung zur Regelung von Kurbelwellengas
EP1845238B1 (fr) Culasse de moteur
DE3542900C2 (fr)
DE102008037350B4 (de) Kurbelgehäuseentlüftungssystem sowie damit ausgestatteter Verbrennungsmotor
DE102006024816A1 (de) Einrichtung für die Entlüftung eines Kurbelgehäuses
WO2012019812A1 (fr) Corps creux à dispositif séparateur d'huile intégré
DE102006024817A1 (de) Zylinderkopf eines Verbrennungsmotors
EP1691043A2 (fr) Dispositif pour ventiler un carter de moteur en particulier d'un moteur en V
DE112013003026T5 (de) Abdecksystem
DE102012001458A1 (de) Brennkraftmaschine
DE10227790A1 (de) Motorkettenabdeckung
EP1094204A1 (fr) Dispositif de ventilation avec un separateur d'huile pour moteur a combustion interne
EP3034820A2 (fr) Dispositif de purge d'air pour un moteur a combustion interne et moteur a combustion interne
DE202007003292U1 (de) Ölabscheider mit mindestens einem Zyklon
DE102015218201B4 (de) Gas-ölabscheider für einen verbrennungsmotor
EP1624162A1 (fr) Procédé d'aération du carter d' un moteur à combustion interne et moteur effectuant ce procédé
EP1498582B1 (fr) Module comprenant un filtre à huile et un séparateur pour moteur à combustion interne
EP2949911B1 (fr) Dispositif de lames de soupape, notamment pour un dispositif de filtre pour un véhicule automobile
DE10320493A1 (de) Brennkraftmaschine mit Kurbelgehäuseentlüftung
DE102015222165B4 (de) Verbrennungsmotor mit einer ölabscheidekammer
EP2336509B1 (fr) Couvre culasse pour moteurs à combustion interne
DE102015217372B4 (de) Ölabscheidestruktur für verbrennungsmotoren
EP2929170B1 (fr) Moteur à combustion interne
DE102004013763A1 (de) Brennkraftmaschine mit Entlüftungssystem
AT503763B1 (de) Brennkraftmaschine mit einem kurbelgehäuse für mehrere zylinder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20060808

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20061110

APBK Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNE

APBN Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2E

APBR Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3E

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: FORD GLOBAL TECHNOLOGIES, LLC

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20180628