EP4314502A1 - Verbrennungskraftmaschine für ein kraftfahrzeug, kraftfahrzeug sowie verfahren - Google Patents
Verbrennungskraftmaschine für ein kraftfahrzeug, kraftfahrzeug sowie verfahrenInfo
- Publication number
- EP4314502A1 EP4314502A1 EP22711036.8A EP22711036A EP4314502A1 EP 4314502 A1 EP4314502 A1 EP 4314502A1 EP 22711036 A EP22711036 A EP 22711036A EP 4314502 A1 EP4314502 A1 EP 4314502A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- internal combustion
- combustion engine
- reservoir
- return
- 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
Links
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
-
- 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
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
- F01M11/061—Means for keeping lubricant level constant
-
- 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
- F01M13/0416—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil arranged in valve-covers
-
- 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
-
- 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
-
- 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
Definitions
- the invention relates to an internal combustion engine for a motor vehicle according to the preamble of patent claim 1.
- the invention also relates to a motor vehicle and a method for operating an internal combustion engine of a motor vehicle according to the preamble of patent claim 10.
- EP 3020934 B1 discloses a vehicle with an internal combustion engine which has a crankcase and a charging device with a
- crankcase ventilation device which has at least one inertia-based oil separation device with at least one inertia-based oil separator, an oil return returning separated oil to the crankcase and a suction jet pump which is driven with compressed air from the charging device and which creates a negative pressure to drive blow-by gas.
- the crankcase ventilation device includes a pump control valve that regulates and/or controls the flow of compressed air through the ejector pump and that has a loss part that is arranged with force applied against a valve seat and when a threshold pressure difference between a valve inlet and a valve Outlet or when an input-side threshold pressure is exceeded against the force of the valve seat is lifted so that the pump control valve is opened.
- EP 3 034820 A2 is a ventilation device for discharging blow-by gas from an engine block of an internal combustion engine, having a first inlet opening and a second inlet opening spaced apart from the first inlet opening for admitting blow-by gas originating from the engine block to remove the ventilation device and with at least one oil separator for separating oil from the blow-by gas as known.
- the ventilation device comprises a first supply channel for supplying blow-by gas to the at least one oil separator, the first supply channel running from the first inlet opening to such an oil separator, and a second supply channel for supplying blow-by gas to the at least an oil separator, wherein the second feed channel from the second inlet opening extends to a connection point which is arranged upstream of the at least one oil separator in the first feed channel.
- the object of the invention is to create an internal combustion engine for a motor vehicle, a motor vehicle with such an internal combustion engine and a method for operating such an internal combustion engine, so that oil can be separated particularly advantageously from a blow-by gas of the internal combustion engine.
- a first aspect of the invention relates to an internal combustion engine for a motor vehicle, which is preferably designed as a motor vehicle, in particular as a passenger car, commercial vehicle or truck.
- the internal combustion engine has an output shaft, designed in particular as a crankshaft, via which the motor vehicle can be driven by the internal combustion engine.
- the internal combustion engine includes a crankcase, referred to in particular as a cylinder crankcase, which at least partially delimits at least one cylinder and a crankcase of the internal combustion engine.
- the output shaft is arranged at least partially within the crankcase and thus in the crankcase, with the output shaft being rotatable relative to the crankcase.
- a piston is preferably arranged in the cylinder so that it can be moved translationally relative to a cylinder wall of the cylinder.
- the cylinder wall can be formed by the crankcase.
- the cylinder wall and the piston partially delimit a combustion chamber of the internal combustion engine.
- the internal combustion engine has an intake duct through which air can flow and an exhaust duct through which exhaust gas from the internal combustion engine can flow.
- the air can be supplied to the combustion chamber via the intake tract and the exhaust gas can be discharged from the combustion chamber via the exhaust tract.
- the air flowing through the intake tract can in particular be referred to as fresh air.
- At least one compressor can be arranged in the intake tract, by means of which the air flowing through the intake tract can be compressed and conveyed into the combustion chamber.
- the internal combustion engine preferably has a cylinder head which partially delimits the combustion chamber.
- An intake duct through which the air can flow can run inside the cylinder head, which intake duct is part of the intake tract, it being possible for the air flowing through the intake duct to be supplied to the combustion chamber.
- the intake tract can run at least partially within the cylinder head, so that the air flowing through the intake tract can be guided through the cylinder head via the intake port.
- combustion processes take place in the combustion chamber, in which a fuel-air mixture comprising fresh air is burned, resulting in the exhaust gas of the internal combustion engine.
- the combustion processes can in particular be referred to as combustion.
- the internal combustion engine has at least two oil separator devices, in particular designed separately from one another, by means of which oil can be separated from a blow-by gas discharged from the crankcase, in particular the crank chamber, and fed to the oil separator devices.
- the oil separating devices can be referred to in particular as oil separators or as oil mist separators.
- Blow-by gas can be understood in particular as exhaust gas which flows from the combustion chamber, in particular via a gap which is at least partially formed by the piston or at least one piston ring arranged on the piston and the cylinder wall, into the crankcase, in particular in the Crank space arrives or flows.
- the blow-by gas may include the oil, wherein the oil may be excluded from the blow-by gas as the blow-by gas flows from the combustion chamber into the crankcase, for example.
- the oil which can wet the cylinder wall and/or the piston rings, for example, can be entrained by the blow-by gas as the blow-by gas flows through the gap, as a result of which the oil is absorbed by the blow-by gas can.
- the oil can be provided, for example, for lubricating, in particular a bearing of the output shaft, in the crankcase or the crankcase and can be absorbed by the blow-by gas in the crankcase.
- the blow-by gas can include the oil
- the blow-by gas can in particular be referred to as oil mist.
- blow-by gas can be used in particular as Crankcase ventilation are called.
- the blow-by gas can be discharged from the crankcase via a line element and fed to the oil separator devices.
- One of the oil separating devices is preferably designed as a full-load oil separator and the other of the oil separating devices is preferably designed as a part-load oil separator.
- This can in particular be understood to mean that in an operating state of the internal combustion engine referred to as full load, the oil can be or is separated from the blow-by gas by means of the full-load oil separator, with the oil preferably not being separated from the blow-by gas by means of the part-load oil separator , and in an operating state of the internal combustion engine that differs from full load and is referred to as part load, the oil can be or is separated from the blow-by gas by means of the part-load oil separator, with the oil preferably not being separated from the blow-by gas by means of the full-load oil separator .
- a torque of the internal combustion engine or the output shaft can be particularly high and correspond, for example, to a maximum torque of the internal combustion engine.
- the torque of the internal combustion engine or the output shaft can be particularly low, in particular lower than at full load and can correspond, for example, to less than 50 percent of the maximum torque of the internal combustion engine.
- the blow-by gas flows through the respective oil separator, as a result of which the oil is separated from the blow-by gas by means of the respective oil separator and the blow-by gas is thus removed by means of the respective oil separation device is cleaned of the oil and is therefore preferably free of the oil after separation.
- the blow-by gas freed from the oil by means of the oil separating devices when separating the oil can be supplied to the intake tract after the separation and can thus be introduced into the intake tract.
- the blow-by gas is preferably introduced into the intake tract upstream of the compressor after the oil has been separated by means of the full-load oil separator in the direction of flow of the air flowing through the intake tract.
- the blow-by gas is preferably introduced into the intake tract, in particular into the inlet channel, downstream of the compressor after the oil has been separated by means of the part-load oil separator in the direction of flow of the air flowing through the intake tract.
- the internal combustion engine includes a return device through which the oil separated by the oil separator devices can flow, via which the oil separated from the blow-by gas by the oil separator devices can be guided or introduced from the oil separator devices into a reservoir.
- the reservoir is preferably designed as an oil pan, which is provided for collecting the oil.
- the oil pan can in particular be referred to as an oil sump.
- the reservoir In the installed position of the internal combustion engine, the reservoir is preferably arranged below the oil separator devices in the vertical direction of the vehicle, with the internal combustion engine assuming the installed position in the motor vehicle in its fully assembled state.
- the internal combustion engine assumes the installation position in a completely manufactured state of the motor vehicle.
- the reservoir can be arranged, for example, in the installation position of the internal combustion engine in the vertical direction of the vehicle below the crankcase or in the crankcase or the crankcase.
- the return device has at least one first return channel through which a first part of the oil separated from the blow-by gas by means of a first of the oil separator devices can flow, via which the first Part of the separated oil can be guided from the first oil separator device into the reservoir and at least one second return channel, which is at least partially spaced apart from the first return channel and through which a second part of the oil, separated from the blow-by gas by means of the second oil separator device, can flow, via which the second part of the separated oil can be guided from the second oil separation device into the reservoir.
- the return device comprises the return channels that are at least partially separate from one another, in particular designed separately from one another, the first oil separator device being fluidically connected to the reservoir via the first return channel and the second oil separator device being fluidically connected to the reservoir via the second return channel, whereby the first part of the oil can be introduced into the reservoir via the first return channel and the second part of the oil can be introduced into the reservoir via the second return channel.
- the return channel assigned to the full-load oil separator can be referred to in particular as a full-load separation channel
- the return channel assigned to the part-load oil separator can be referred to in particular as a part-load separation channel.
- a filtration efficiency of the respective oil separation device can depend, in particular directly, on a pressure loss referred to as pressure loss potential, viewed in the direction of flow of the oil, above the oil separation device.
- the pressure loss can be understood in particular as a pressure difference, in particular a hydrostatic pressure difference, between two pressures, with a first of the pressures being a pressure of the oil in the oil separator device and the second of the pressures being a pressure of the oil in the return device or in the reservoir .
- the filtration efficiency can be understood in particular as an efficiency of the oil separated by means of the respective oil separation device, in particular a degree of separation. A particularly high filtration efficiency can usually be achieved with a particularly high pressure loss.
- Oil tearing can be understood in particular to mean that oil flows upwards via the return device, which is referred to in particular as an oil return channel, in the vertical direction of the vehicle, contrary to an originally intended flow direction of the oil flowing through the return device, into the respective oil separation device, in particular into a separation chamber of the respective oil separation device and/or even into can reach the intake tract, in particular in the direction of flow of the air flowing through the intake tract upstream of the compressor and/or into the intake duct.
- the filtration efficiency of the oil separator can drop particularly sharply.
- the oil can get into the intake tract, the oil can get into the combustion chamber via the intake tract and take part in the combustion processes or be burned there, as a result of which pollutant emissions from the internal combustion engine can be particularly increased.
- the return device can only have exactly one return channel, via which the first part and the second part of the separated oil can be guided from the respective oil separator device into the reservoir.
- the two oil separator devices can have a common return channel.
- one of the oil separator devices can be arranged below the other oil separator devices in the vertical direction of the vehicle, for example the part-load oil separator be arranged in the vertical direction of the vehicle below the full-load oil separator.
- a geodetic height difference referred to in particular as the geodetic height, of the respective oil separation device, in particular of the lower oil separation devices in the vertical direction of the vehicle, between the respective oil separation device and the reservoir can be particularly small.
- the geodetic height difference can be understood as a distance between two points running in the vertical direction of the vehicle, wherein a first of the points can be arranged, for example, in a respective outlet opening of the respective oil separation device and the second point can be arranged in the reservoir.
- the respective oil separation device is fluidically connected to the return device via the respective outlet opening.
- the first point is preferably a lowest point of the outlet opening in the vertical direction of the vehicle.
- the second point is a highest point of the reservoir in the vertical direction of the vehicle.
- the pressure loss potential and thus the filtration efficiency of the respective oil separator device in the conventional internal combustion engine can be particularly low.
- the geodetic height difference can no longer be sufficient, so that the oil flows through the return device, contrary to the originally intended flow direction of the oil , Can be pushed upwards in the vehicle vertical direction into the oil separation devices, in particular into the separation chambers, or even into the intake tract.
- the geodetic height difference or the distance is particularly high, as a result of which the oil flows cleanly downwards in the vertical direction of the vehicle in all driving states of the motor vehicle, in particular when cornering, even with particularly high lateral acceleration the reservoir can be routed and from there cannot reach the oil separator devices in the vertical direction of the vehicle.
- the pressure loss potential can be particularly increased, as a result of which the filtration efficiency of the respective oil separation devices can be particularly increased.
- the oil separation devices can be arranged particularly high in the internal combustion engine in the vertical direction of the vehicle and thus compared to a conventional internal combustion engine be shifted particularly far up, whereby the geodetic height difference or the distance can be particularly increased.
- the internal combustion engine comprises the reservoir and the oil separator devices are each equidistant from the reservoir in the installation position of the internal combustion engine in the vertical direction of the vehicle.
- the respective first point of the respective oil separation device is spaced the same distance from the second point in the vertical direction of the vehicle.
- both oil separating devices have the same geodetic height difference or the same value of the geodetic height difference, as a result of which the pressure loss potential for both oil separating devices can be particularly increased.
- the internal combustion engine according to the invention comprises the reservoir in the embodiment, the reservoir in the embodiment is part of the scope of protection of the internal combustion engine according to the invention.
- the return channels have at least one length region through which the oil can flow and which runs within a housing wall of the crankcase, which is delimited in its circumferential direction at least partially, in particular completely circumferentially, by the housing wall, in particular directly.
- the two parts of the oil are routed through the housing wall of the crankcase over the respective length area of the return ducts.
- the oil discharged from the respective oil separator device can be received by the respective return channel, in particular at an interface to the cylinder head, and can thus be routed through the crankcase downwards in the vertical direction of the vehicle to the reservoir.
- the oil separated from the blow-by gas by means of the oil separating devices can be routed from the oil separating devices into the reservoir in a particularly advantageous manner, as a result of which, for example, manufacturing costs or manufacturing effort of the internal combustion engine and/or the installation space of the internal combustion engine can be kept particularly low.
- the internal combustion engine comprises respective opening points at which the return channels open into at least one receiving region which is delimited, in particular directly, by the reservoir and in which the oil can be received.
- this is the respective Oil flowing through the return channel can be removed or discharged from the respective return channel via the respective orifice point and introduced into the reservoir, the respective return channel being fluidically connected to the receiving area by means of the respective orifice point.
- the oil flowing through the return channels can be fed into the reservoir in a particularly advantageous manner.
- At least one of the openings in the installed position of the internal combustion engine is arranged in the vertical direction of the vehicle below an oil level of the oil in the reservoir, referred to in particular as the oil level.
- the oil level an oil level of the oil in the reservoir
- the internal combustion engine is in a deactivated state and/or when the oil received in the receiving area or the reservoir has a temperature of 25° Celsius and/or the internal combustion engine has a defined oil quantity, referred to in particular as a target oil quantity, which is intended for normal operation of the internal combustion engine when the internal combustion engine is in a completely manufactured state
- the fact that the motor vehicle is at rest can in particular be understood to mean that the motor vehicle is not driving and is therefore not moving relative to the roadway.
- the fact that the roadway is level can be understood in particular to mean that the roadway is not inclined, that is to say has no incline.
- the deactivated state of the internal combustion engine is an operating state of the internal combustion engine that differs from the activated state, with the combustion processes in the combustion chamber not taking place in the deactivated state.
- an oil siphon through which the oil can flow for example in the cylinder head, can be arranged in the flow direction of the oil flowing from the respective oil separator to the reservoir between the oil separator and the reservoir.
- the oil siphon has at least one curved sub-area in which the oil can collect, the oil collected in the sub-area being able to flow out of the sub-area, in particular when a fill level of the sub-area is exceeded, and thereby discharged, for example, from the oil siphon and can be introduced into the return device.
- the oil siphon in the conventional internal combustion engine be arranged in particular directly on the oil separator and are referred to in particular as a bird bath.
- the oil siphon can assume a function referred to in particular as a tightness function, since the oil siphon can be impermeable to gas as a result of the oil located there.
- a second geodetic height difference or a second distance between the oil siphon and the respective oil separating device in the vertical direction of the vehicle can be particularly low, as a result of which the pressure loss potential and thus the filtration efficiency of the respective oil separating device can be particularly low.
- the oil siphon of the conventional internal combustion engine can be omitted since the reservoir, in particular the oil pan, has the function of the conventional oil siphon.
- one position of the oil siphon in the vertical direction of the vehicle, in particular compared to the conventional internal combustion engine can be moved particularly far down, as a result of which the second distance or the second geodetic height difference can be particularly increased.
- the geodetic height difference can correspond to the second geodetic height difference.
- the respective return channel can run at least partially within a reservoir wall, which at least partially delimits the reservoir, and can be routed below the target oil level of the reservoir in the vertical direction of the vehicle.
- the respective return duct or the oil flowing through the respective return duct can communicate in the vertical direction of the vehicle below the target oil level with a reservoir interior, which is referred to in particular as the interior of the trough.
- at least one of the openings can be arranged in the installed position of the internal combustion engine in the vertical direction of the vehicle above the oil level of the oil in the oil pan.
- the oil separating devices are arranged in a cylinder head cover which, when the internal combustion engine is installed, is arranged in the vertical direction of the vehicle above the cylinder head of the internal combustion engine.
- the oil separator devices are at least partially surrounded by the cylinder head cover.
- the cylinder head is in Vehicle vertical direction arranged above the crankcase and limits the crankcase in vehicle vertical direction upwards at least partially, in particular directly.
- the cylinder head cover can in particular be referred to as a valve cover and delimits the cylinder head in the vertical direction of the vehicle at least partially, in particular directly. Due to the fact that the oil separator devices are arranged in the cylinder head cover, the geodetic height difference or the distance can be particularly increased, as a result of which the pressure loss potential can be particularly increased.
- the return ducts each have at least one second length region through which the oil can flow, which is arranged upstream of the respective length region in the direction of flow of the oil flowing through the return ducts and runs inside the cylinder head, the second length region extending at least partially, in particular completely, in its circumferential direction circumferentially, is limited by the cylinder head, in particular directly.
- at least the respective second longitudinal region of the return channels is arranged in the cylinder head, whereby the two parts of the oil can be guided or introduced from the respective oil separator through the cylinder head into the reservoir.
- the two parts of the oil from the respective oil separator devices can be guided from the cylinder head cover via the cylinder head through the crankcase to the reservoir.
- the respective return channel is produced by means of drilling and/or by means of casting.
- the respective length area and/or the respective second length area is produced by means of drilling and is thereby designed as a respective bore and/or is produced by means of casting and is thereby cast.
- the respective return channel can be machined by drilling and/or the respective return channel can be cast.
- a production of the respective return channel designed as a bore can be carried out, for example, by means of two meeting bores, wherein a first of the bores can be made starting from the cylinder head, which can be described in particular as a bore coming from a cover surface, and a second of the bores can be made starting from the reservoir side be carried out, which can be described in particular as a bore on the reservoir side or on the oil pan side.
- the respective return channels are preferably cast by means of at least one core.
- the respective return channel can be particularly cost-effective and/or by means of drilling or by means of casting be manufactured particularly precisely.
- the respective cross-sections of the return channels can be of different sizes, depending on requirements and production possibilities.
- At least one sealing element can be installed between the reservoir and the crankcase, in particular the housing wall.
- the sealing element can be arranged between the reservoir and the crankcase, in particular the housing wall, by means of which the reservoir or the respective return channel can be kept particularly tight.
- a second aspect of the invention relates to a motor vehicle which has an internal combustion engine according to the first aspect of the invention.
- Advantages and advantageous configurations of the first aspect of the invention are to be regarded as advantages and advantageous configurations of the second aspect of the invention and vice versa.
- the motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car, commercial vehicle or truck or as a passenger bus or motorcycle.
- a third aspect of the invention relates to a method for operating an internal combustion engine for a motor vehicle, having a crankcase and at least two oil separator devices that are designed separately from one another, according to the first aspect of the invention.
- Advantages and advantageous configurations of the first aspect and the second aspect of the invention are to be regarded as advantages and advantageous configurations of the third aspect of the invention and vice versa.
- oil is separated from a blow-by gas discharged from the crankcase and fed to the oil separator devices by means of the oil separator devices, and by means of a return device through which the oil separated by means of the oil separator devices can flow, the oil separated from the blow-by gas by means of the oil separator devices is separated Oil out of the oil separator in a reservoir or introduced.
- the reservoir In the installation position of the internal combustion engine, the reservoir is preferably arranged below the oil separator devices in the vertical direction of the vehicle.
- the reservoir is preferably designed as an oil pan in which the oil fed into the oil pan is collected.
- the return device has at least one of a a first return channel through which the first part of the separated oil is guided from the first oil separator device into the reservoir, and at least one at least partially from the first return channel spaced or separate second return channel through which a second part of the oil can flow, separated from the blow-by gas by means of the second oil separator, via which the second part of the separated oil is guided from the second oil separator into the reservoir.
- FIG. 1 shows a schematic partial sectional view of an internal combustion engine according to the invention in a perspective view
- Fig. 2 is a schematic partial sectional view of one according to the invention
- Fig. 3 is a schematic partial sectional view of one according to the invention
- FIG. 4 shows a schematic partial sectional view of an internal combustion engine according to the invention in a front perspective view.
- FIG. 1 shows a schematic partial sectional view of an internal combustion engine 1 for a motor vehicle 2 in a perspective view
- FIG. 2 shows a schematic Partial sectional view of the internal combustion engine 1 in a side perspective view
- FIG. 3 shows the internal combustion engine in a schematic partial sectional view
- the motor vehicle 2 is preferably designed as a motor vehicle, in particular as a passenger car, commercial vehicle or truck.
- the internal combustion engine 1 comprises an output shaft, designed in particular as a crankshaft, via which the motor vehicle
- the internal combustion engine 1 has at least one crankcase 3, referred to in particular as a cylinder crankcase, which at least partially delimits at least one cylinder 4 and a crank chamber 5 of the internal combustion engine 1, with the internal combustion engine 1 shown in the exemplary embodiment comprising six cylinders 4.
- Each cylinder 4 has a cylinder wall 6 which partially delimits a combustion chamber 7 in each case.
- a piston is arranged in each cylinder 4 and can be moved translationally relative to the cylinder wall 6 .
- the internal combustion engine 1 has an intake tract through which air can flow and an exhaust duct through which an exhaust gas of the internal combustion engine 1 can flow.
- the air referred to in particular as fresh air can be supplied to the combustion chamber 7 via the intake tract, and the exhaust gas can be discharged from the combustion chamber 7 via the exhaust tract.
- combustion processes referred to in particular as combustion, take place in the respective combustion chamber 7 , with a fuel-air mixture comprising fresh air being burned, resulting in the exhaust gas of the internal combustion engine 1 .
- a gas in particular the exhaust gas
- a gas can escape from the respective combustion chamber 7, in particular through a gap which is at least partially formed by the respective piston and the respective cylinder wall 6, into the crankcase 3 or the crankcase 5 arrive, wherein the gas that reaches the crankcase 3 or the crankcase 5 from the respective combustion chamber 7 and is located in the crankcase 5 can be referred to in particular as blow-by gas.
- the internal combustion engine 1 has at least two oil separator devices 8, 9, in particular designed separately from one another, by means of which oil can be separated from the blow-by gas discharged from the crankcase 3 or the crank chamber 5 and fed to the oil separator devices 8, 9.
- the oil separation devices 8, 9 are shown schematically in FIGS.
- the Internal combustion engine 1 includes one of the means of
- the reservoir 11 can in particular be designed as an oil pan and be provided for collecting the oil.
- the reservoir 11 is preferably arranged in the installation position of the internal combustion engine in the vertical direction 12 of the vehicle below the oil separator devices 8, 9 in the crankcase 3 or the crank chamber 5 or in the vertical direction 12 of the vehicle below the crankcase 3. In its fully manufactured state, the internal combustion engine 1 assumes the installation position in the motor vehicle 2 in a fully manufactured state of the motor vehicle 2 .
- the reservoir 11 is shown in FIG. 4, in which a schematic partial sectional view of the internal combustion engine 1 is shown in a front perspective view. In a provided flow direction 12a, the oil flowing through the return device 10 flows from the respective oil separator device 8,
- the return device 10 has at least one first return channel 14 through which a first part 13 of the oil separated from the blow-by gas by means of a first of the oil separator devices 8 can flow , via which the first part 13 of the separated oil can be guided from the first oil separation device 8 into the reservoir 11, and at least one at least partially spaced or separated from the first return channel 14 and removed from the blow-by gas by means of the second oil separation device 9 separated, second part 15 of the oil through which the oil can flow, second return channel 16, via which the second part 15 of the separated oil can be guided from the second oil separator device 9 into the reservoir 11.
- a respective geodetic height difference or a respective distance 17, 18 in the vertical direction 12 of the vehicle between the respective oil separation device 8, 9 and the reservoir 11 can be particularly increased.
- the respective distance 17, 18 runs in the vertical direction 12 of the vehicle, for example between a respective first point 8a, 9a of the respective oil separation device 8, 9 and a second point 11a of the reservoir
- the respective first point 8a, 9a is arranged, for example, in a respective outlet opening of the respective oil separator device 8, 9 and the second point 11a is in be arranged in the reservoir 11 .
- the respective oil separation device 8, 9 is fluidically connected to the return device 10 via the respective outlet opening.
- the respective first point 8a, 9a is preferably a lowest point of the respective outlet opening in the vertical direction 12 of the vehicle. Due to the fact that the respective distance 17, 18 can be particularly increased, a respective pressure loss potential of the respective oil separator device 8, 9 can be particularly increased.
- the filtration efficiency of the respective oil separation device 8, 9 can be particularly increased and, on the other hand, it can be avoided that oil in the reservoir 11 flows upwards through the return device 10, in particular the respective return channel 14, 16, in the vertical direction 12 of the vehicle and thus against the intended direction of flow 12a to the respective oil separator device 8, 9 flows.
- the filtration efficiency of the respective oil separator device 8, 9 can be particularly increased and introduction of the oil that has flowed back into the intake tract can be avoided, as a result of which pollutant emissions from the internal combustion engine 1 can be kept particularly low.
- the internal combustion engine 1 is preferably installed in the motor vehicle
- the oil separation devices 8, 9 are each equidistant from the reservoir 11 in the vertical direction 12 of the vehicle.
- a first of the distances 17 between the first oil separation device 8 and the reservoir 11 is the same size as the second of the distances 18 between the second oil separation device 9 and the reservoir 11.
- the return channels 14, 16 each have at least one through which the oil can flow and within a housing wall 19 of the crankcase
- the first return channel 14 or the longitudinal area 20, 21 of the first return channel 14 is arranged in the crankcase 3 on the inlet side.
- the second return channel 16 or the longitudinal area 20, 21 of the second return channel 16 is arranged in the crankcase 3 on the inlet side.
- the following can be understood in particular by the arrangement on the inlet side or the outlet side: Based on an imaginary position in the vertical direction 12 of the vehicle and in the direction of longitudinal extension of the A first side of the center plane of the cylinders 4 extending on the output shaft can be referred to as the intake side, with the air flowing through the intake tract being guided via the first side to the combustion chambers 7 and a second side of the center plane opposite the first side can be referred to as the outlet side, the exhaust gas flowing through the exhaust tract being discharged from the combustion chambers 7 via the second side.
- the partial sectional view shown in FIG. 2 is a partial sectional view on the inlet side.
- the first oil separator 8 is designed as a part-load oil separator and the second oil separator 9 is designed as a full-load oil separator.
- the first return channel 14 is referred to as a partial load separation channel and the second return channel 16 as a full load separation channel.
- the internal combustion engine 1 comprises a cylinder head 25 which is arranged above the crankcase 3 in the installed position of the internal combustion engine 1 in the motor vehicle 2 .
- the oil separation devices 8, 9 are preferably arranged in a cylinder head cover 24, which is arranged in the installation position of the internal combustion engine 1 in the motor vehicle 2 in the vertical direction 12 of the vehicle above the cylinder head 25 of the internal combustion engine 1.
- the cylinder head cover 24 can in particular be referred to as a valve cover and delimits the cylinder head 25 upwards in the vertical direction 12 of the vehicle at least partially, in particular directly.
- the return ducts 14, 16 each have at least one second length region 26, 27 through which the oil can flow, which is arranged upstream of the respective length region 20, 21 in the direction of flow 12a of the oil flowing through the return ducts 14, 16 and which runs within the cylinder head 25 , wherein the respective second length region 26, 27 in its respective circumferential direction 28, 29 is at least partially, in particular completely circumferentially, limited by the cylinder head 25, in particular directly.
- the oil can be guided from the respective oil separator device 8, 9 through the cylinder head 25 and the crankcase 3 into the reservoir 11, with the fact that the oil separator devices 8, 9 are arranged in the cylinder head cover 24, the distances 17, 18 particularly can be increased.
- the internal combustion engine 1 comprises respective openings 30, 31, at which the return channels 14, 16 open into at least one receiving area 32, which is directly delimited by the reservoir 11 and in which the oil can be received.
- the openings 30, 31 are shown in FIG. 4 as an example and schematically outlined.
- the return channels 14, 16 each have at least one third length region 33 through which the oil can flow, which is arranged downstream of the respective length region 20, 21 in the flow direction 12a of the oil flowing through the return channels 14, 16 and which runs within a reservoir wall 34 of the reservoir 11.
- the third longitudinal region 33 is delimited in its circumferential direction at least partially, in particular completely circumferentially, by the reservoir wall 34, in particular directly.
- At least one of the opening points 30, 31 is arranged in the installed position of the internal combustion engine 1 in the motor vehicle 2 in the vertical direction 12 of the vehicle below an oil level 35 of the oil in the reservoir 11, referred to in particular as the oil level.
- the reservoir 11 can assume the function of a siphon, referred to in particular as an oil siphon, which means that a corresponding oil siphon designed separately from the reservoir 11 can be omitted, with the oil collected in the reservoir 11 e.g , can flow out of the reservoir 11 , in particular laterally or laterally downwards in the vertical direction of the vehicle. In other words, the oil siphon can be moved into the reservoir 11.
- the third length region 33 can lengthen the respective return channel 14, 16 in the vertical direction 12 of the vehicle to below the oil level 35.
- at least one of the openings 30, 31 can be arranged above the oil level 35 in the installed position of the internal combustion engine 1 in the vertical direction 12 of the vehicle.
- the respective return channel 14, 16, in particular at least one of the respective longitudinal areas 20, 21, 26, 27, 33, is preferably produced by means of drilling and/or by means of casting.
- the internal combustion engine 1, in particular the respective return channel 14, 16, can be manufactured particularly advantageously and particularly inexpensively.
- at least one valve device 36 referred to in particular as a check valve, can be arranged, by means of which a respective mass flow of the oil flowing through the respective return channel 14, 16 can be adjusted.
- a counter to the direction of flow 12a running from the reservoir 11 through the respective return channel 14, 16 running Backflow of the oil to the respective oil separator 8, 9 can be avoided in a particularly advantageous manner.
- combustion chamber first oil separation device a first point second oil separation devicea first point 0 return device 1 reservoir 1; second point 2 vertical direction of vehicle 2 direction of flow 3 first part 4 first return channel 5 second part 6 second return channel 7 first distance 8 second distance 9 housing wall 0 length area 1 length area 2 circumferential direction 3 circumferential direction 4 cylinder head cover 5 cylinder head 6 second length area 7 second length area 8 circumferential direction 9 circumferential direction 0 first estuary second opening point receiving area third length area reservoir wall oil level
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021108393.1A DE102021108393B3 (de) | 2021-04-01 | 2021-04-01 | Verbrennungskraftmaschine für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren |
| PCT/EP2022/055784 WO2022207247A1 (de) | 2021-04-01 | 2022-03-08 | Verbrennungskraftmaschine für ein kraftfahrzeug, kraftfahrzeug sowie verfahren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4314502A1 true EP4314502A1 (de) | 2024-02-07 |
| EP4314502B1 EP4314502B1 (de) | 2025-05-07 |
Family
ID=80785093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22711036.8A Active EP4314502B1 (de) | 2021-04-01 | 2022-03-08 | Verbrennungskraftmaschine für ein kraftfahrzeug, kraftfahrzeug sowie verfahren |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12590553B2 (de) |
| EP (1) | EP4314502B1 (de) |
| CN (1) | CN116724165A (de) |
| DE (1) | DE102021108393B3 (de) |
| WO (1) | WO2022207247A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2633829A (en) * | 2023-09-22 | 2025-03-26 | Jcb Res | Internal combustion engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108312U (de) * | 1988-01-14 | 1989-07-21 | ||
| US20100077999A1 (en) * | 2007-04-18 | 2010-04-01 | Naoya Okada | Internal combustion engine |
| DE102016015111A1 (de) * | 2016-12-20 | 2018-06-21 | Deutz Aktiengesellschaft | Brennkraftmaschine |
| EP3020934B1 (de) * | 2014-11-14 | 2019-05-01 | Mahle International GmbH | Kurbelgehäuseentlüftungseinrichtung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0558807U (ja) * | 1992-10-22 | 1993-08-03 | 三菱自動車工業株式会社 | エンジンのオイル戻し構造 |
| DE4239108A1 (de) * | 1992-11-20 | 1994-05-26 | Opel Adam Ag | Vorrichtung zur Entlüftung des Kurbelgehäuses einer Brennkraftmaschine mit V-förmig angeordneten Zylindern |
| DE202004010550U1 (de) | 2004-07-06 | 2005-11-17 | Hengst Gmbh & Co.Kg | Einrichtung für die Regelung des Drucks im Kurbelgehäuse einer Brennkraftmaschine und für die Ölnebelabscheidung aus dem Kurbelgehäuseentlüftungsgas |
| DE102008029904A1 (de) * | 2008-06-24 | 2009-12-31 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung und Verfahren zur Kurbelgehäuseentlüftung |
| CN104685173B (zh) * | 2012-10-02 | 2016-11-16 | 日产自动车株式会社 | V型内燃机的漏气处理装置 |
| DE102014225817B4 (de) | 2014-12-15 | 2022-10-06 | Mahle International Gmbh | Entlüftungseinrichtung für eine Brennkraftmaschine sowie Brennkraftmaschine |
| JP2016113999A (ja) * | 2014-12-17 | 2016-06-23 | アイシン精機株式会社 | オイルミスト分離装置 |
| JP6549659B2 (ja) * | 2017-08-21 | 2019-07-24 | 本田技研工業株式会社 | 内燃機関のブリーザ装置 |
| CN114846225B (zh) * | 2020-03-16 | 2025-06-24 | 株式会社久保田 | 窜漏气体处理装置以及具有窜漏气体处理装置的发动机 |
| DE102020119668B4 (de) | 2020-07-27 | 2022-03-31 | Bayerische Motoren Werke Aktiengesellschaft | Verbrennungskraftmaschine mit zumindest zwei Ölabscheidern |
-
2021
- 2021-04-01 DE DE102021108393.1A patent/DE102021108393B3/de active Active
-
2022
- 2022-03-08 EP EP22711036.8A patent/EP4314502B1/de active Active
- 2022-03-08 WO PCT/EP2022/055784 patent/WO2022207247A1/de not_active Ceased
- 2022-03-08 CN CN202280010854.0A patent/CN116724165A/zh active Pending
- 2022-03-08 US US18/279,160 patent/US12590553B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01108312U (de) * | 1988-01-14 | 1989-07-21 | ||
| US20100077999A1 (en) * | 2007-04-18 | 2010-04-01 | Naoya Okada | Internal combustion engine |
| EP3020934B1 (de) * | 2014-11-14 | 2019-05-01 | Mahle International GmbH | Kurbelgehäuseentlüftungseinrichtung |
| DE102016015111A1 (de) * | 2016-12-20 | 2018-06-21 | Deutz Aktiengesellschaft | Brennkraftmaschine |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2022207247A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US12590553B2 (en) | 2026-03-31 |
| WO2022207247A1 (de) | 2022-10-06 |
| US20240125258A1 (en) | 2024-04-18 |
| CN116724165A (zh) | 2023-09-08 |
| EP4314502B1 (de) | 2025-05-07 |
| DE102021108393B3 (de) | 2022-07-14 |
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