EP2729671A1 - Schmiersystem, brennkraftmaschine und verfahren zum betreiben eines schmiersystems - Google Patents
Schmiersystem, brennkraftmaschine und verfahren zum betreiben eines schmiersystemsInfo
- Publication number
- EP2729671A1 EP2729671A1 EP12733457.1A EP12733457A EP2729671A1 EP 2729671 A1 EP2729671 A1 EP 2729671A1 EP 12733457 A EP12733457 A EP 12733457A EP 2729671 A1 EP2729671 A1 EP 2729671A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- internal combustion
- combustion engine
- pump
- reservoir
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 63
- 238000005461 lubrication Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000314 lubricant Substances 0.000 claims abstract description 161
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
-
- 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
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
-
- 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
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0246—Adjustable pumps
-
- 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
- F01M2011/0095—Supplementary oil tank
Definitions
- Lubricating system Internal combustion engine and method for operating a lubrication system
- the invention relates to a lubricant system of an internal combustion engine, a corresponding internal combustion engine and a method for operating a lubricating system according to the preamble of the independent claims.
- German Offenlegungsschrift DE 10 2007 020 807 A1 discloses a lubricant circuit for an internal combustion engine.
- lubricant is conveyed by means of at least one lubricant pump from a storage tank to lubrication points in at least one cylinder head of the internal combustion engine.
- lubricant collecting tank formed in the cylinder head, which causes at least one a concentrated lubricant return
- Lubricant return connection is connected to the storage tank.
- an oil pump which has a pivotable about a bearing pin stator for adjusting the flow rate.
- the adjusting force required for the stator is generated by a piston which is acted upon hydraulically with a control pressure.
- the inventive lubrication system of an internal combustion engine, the corresponding internal combustion engine and the method for operating a lubrication system with the characterizing features of the independent claims have the advantage that the arrangement of a lubricant reservoir in the hydraulic connection between the lubricant pump and engine depending on the operating condition of the internal combustion engine Brennkraftma- machine can be lubricated by lubricant from the lubricant reservoir.
- the lubricant requirement of the internal combustion engine must be covered at any time, can be covered by the use of a lubricant reservoir next to the lubricant pump, the lubricant requirement also from the lubricant reservoir.
- the promotion of lubricant can be interrupted by the lubricant pump, so the engine alone by lubricant from the
- Lubricant storage is lubricated.
- the power consumption of the lubricant pump can be reduced, so that the operation of the internal combustion engine improves in terms of the usable torque and dynamics.
- the emission behavior with respect to NOx peaks can be improved.
- an adjustable control pump as a lubricant pump
- the flow rate is changed by an adjustable displacement volume, since the adjustable control pump to the lubricant requirement of the engine adapts without the flow rate is changed by an external control of the speed.
- adjustable displacement volume of the adjustable control pump can be regulated by a hydraulic feedback line, since the displacement volume of the adjustable control pump is changed depending on the pressure in the hydraulic feedback line.
- a hydraulic feedback line for controlling the displaceable displacement volume is characterized positively by its ease of implementation in the lubrication system, since no additional control devices are required in addition to an additional line.
- a means for decoupling the lubricant pump in the lubrication system, by which the supply of lubricant through the lubricant pump in Rieh- tion of the internal combustion engine can be interrupted is advantageous because at a high load request to the internal combustion engine by the driver, for example during an acceleration phase, less additional load is generated by the lubricant pump.
- the use of the means for decoupling the lubricant pump reduces the power consumption of the lubricant pump, so that the internal combustion engine has to apply a lower driving torque for the lubricant pump.
- shut-off valve which is arranged between the lubricant pump and the lubricant reservoir, as means for decoupling the lubricant pump, since the shut-off valve is a cost-effective component, which can be easily integrated into the lubrication system.
- control unit which is in communication with the internal combustion engine, the lubricant reservoir and the means for decoupling the lubricant pump, a precise adjustment of the means for decoupling the lubricant pump, depending on the operating condition of the internal combustion engine and the pressure in the lubricant reservoir is possible.
- a method for operating a lubrication system of an internal combustion engine in which the engine is lubricated at a high load requirement by lubricant from the lubricant reservoir, since the lubrication is ensured during high load phases of the internal combustion engine and the power consumption of the lubricant pump by the additional lubricant from the lubricant reservoir lower is.
- Particularly advantageous is the verification of the pressure in the lubricant reservoir by the control unit at a high load request to the internal combustion engine, since it is ensured by checking the pressure that the Internal combustion engine is a sufficient amount of lubricant available.
- the means for decoupling the lubricant pump interrupts the delivery of lubricant from the lubricant pump to the engine only when a sufficient amount of lubricant in the lubricant reservoir is available.
- control unit when falling below the predetermined pressure value in the lubricant reservoir controls the means for decoupling the lubricant pump, so that the lubricant pump promotes lubricant to the engine, so that an adequate supply of the internal combustion engine is ensured with lubricant and the lubricant reservoir is refilled with lubricant.
- the figure shows a lubrication system of an internal combustion engine 2.
- the lubrication system has a lubricant pump 8, which conveys lubricant from a reservoir 12 via a hydraulic line 10 to the engine 2.
- a filter 7 may be arranged to filter dirt particles from the lubricant.
- the filter 7 may also be arranged in the hydraulic line 10 between the lubricant pump 8 and the internal combustion engine 2.
- the drive of the lubricant pump 8 can be done mechanically via the clutch, gear or timing belt by the internal combustion engine 2.
- the lubricant pump 8 may have an electric drive that can be operated with variable power and thus variable speed or constant power and speed. Since there are many moving parts in the internal combustion engine 2, such as the crankshaft with bearings, the connecting rod with bearings or the camshaft with bearings, the internal combustion engine 2 requires lubrication to damage the movable components during operation of the internal combustion engine 2 avoid.
- the lubricant pump 8 delivers lubricant via the hydraulic connection 10 to the engine 2.
- the liquid lubricant passes through internal channels of the engine 2 to the lubrication points in the internal combustion engine 2.
- a crankshaft of the internal combustion engine can by its rotational movement for an additional turbulence of the lubricant and thus contribute to cooling.
- the dripping and emerging from the internal channels lubricant passes through a lubricant discharge 30 into the reservoir 12th
- a lubricant reservoir 14 is arranged in the hydraulic connection 10 between the lubricant pump 8 and the internal combustion engine 2.
- the lubricant reservoir 14 is as shown in the figure with the hydraulic connection 10 via a branch line 11 in conjunction and is thus filled during operation of the lubricant pump 8 with lubricant.
- the lubricant reservoir 14 may also be designed as an accumulator.
- the lubricant reservoir 14 may also be arranged hydraulically in series with the lubricant pump 8 and the internal combustion engine 2 in the hydraulic line 10.
- Lubricant which is conveyed from the lubricant pump 8 to the internal combustion engine 2, passes from the lubricant pump 8 via a portion of the hydraulic line 10 into the lubricant reservoir 14 and from there via a further section of the hydraulic line 10 into the internal combustion engine 2.
- lubricant reservoir 14 In the lubricant reservoir 14 is lubricant under pressure for lubrication of the internal combustion engine 2 available. If the lubricant requirement of the internal combustion engine 2 is not covered by the lubricant pump 8, the internal combustion engine 2 is lubricated with lubricant from the lubricant reservoir 14. In the lubrication system, a means for decoupling 16 of the lubricant pump 8 is arranged by which the promotion of lubricant to the internal combustion engine 2 can be interrupted.
- the means for decoupling 16 of the lubricant pump 8 is connected to an electrical control unit 20 in connection.
- the control unit 20 is connected to the internal combustion engine 2, the lubricant reservoir 14 and the means for decoupling 16 of the lubricant pump 8 in combination.
- the control unit 20 monitors the operating state of the internal combustion engine 2 and the pressure in the lubricant reservoir 14.
- the control unit 20 activates the means for decoupling 16 of the lubricant pump 8 and enables the delivery of lubricant through the lubricant pump 8 to the engine 2 or interrupts the promotion of lubricant through the lubricant pump 8 to the engine 2.
- the means for decoupling 16 of the lubricant pump 8 is driven so that the lubricant pump 8 promotes no lubricant to the engine 2.
- the means for decoupling 16 of the lubricant pump 8 is driven so that the lubricant pump 8 again promotes lubricant to the engine 2.
- the means for decoupling 18 of the lubricant pump 8 is a shut-off valve 16, which is arranged in the hydraulic line 10 between the lubricant pump 8 and the lubricant reservoir 14 and can be opened and closed by the control unit 20.
- a proportional valve or a pressure or flow divider can be used, through which a smoother transition between the individual operating modes is made possible.
- an adjustable control pump 8 As a lubricant pump 8, an adjustable control pump 8 is used, the flow rate can be changed by an adjustable displacement volume.
- the adjustable displacement volume of the variable-displacement pump 8 is controlled by a hydraulic feedback line 18.
- the feedback line branches off from a line section 17 between lubricant pump 8 and shut-off valve 16 and acts on a control piston of the adjustable control pump 8.
- the control piston of the adjustable control pump 8, the delivery volume of the adjustable control pump 8 can be changed.
- the flow rate of the adjustable control pump 8 can be adjusted continuously between a zero flow rate and a maximum flow rate. The maximum flow rate depends on the design of the adjustable control pump 8 and is determined by the maximum cell volume.
- the shut-off valve 16 is closed.
- a high pressure builds up in the line section 17.
- the high pressure acts via the feedback line 18 on the control piston of the adjustable control pump 8 and causes the delivery volume of the variable displacement pump 8 is greatly reduced.
- the adjustable control pump 8 is regulated so far with a further increase in the pressure in the line section 17 that it no longer promotes lubricant.
- the power consumption of the adjustable control pump 8 is reduced to a very low value, so that the internal combustion engine 2 only has to apply a low drive torque for the operation of the adjustable control pump 8. Since no lubricant from the reservoir 12 is conveyed from the lubricant pump 8 to the engine 2, the lubricant requirement of the internal combustion engine 2 is covered by the pressurized lubricant from the lubricant reservoir 14.
- control unit 20 controls the shut-off valve 16 so that the shut-off valve 16 is opened and the lubricant pump 8 can again promote lubricant to the internal combustion engine 2.
- shut-off valve 16 By opening the shut-off valve 16, the pressure in the line section 17 and in the feedback line 18 decreases, so that the pressure on the control piston decreases. A low pressure on the control piston causes the delivery volume of the adjustable control pump 8 increases and again more lubricant is supplied to the internal combustion engine 2.
- the pressure drop in the line section 17 and in the feedback line 18 is higher than with filled lubricant reservoir 14.
- the control piston in the variable displacement pump 8 By the lower pressure is adjusted via the control piston in the variable displacement pump 8, a higher delivery volume, so that the adjustable control pump 8 in addition to the lubricant for lubricating the Bennkraftmaschine 2 also transported additional lubricant for filling the lubricant reservoir 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011078843A DE102011078843A1 (de) | 2011-07-08 | 2011-07-08 | Schmiersystem, Brennkraftmaschine und Verfahren zum Betreiben eines Schmiersystems |
PCT/EP2012/062745 WO2013007543A1 (de) | 2011-07-08 | 2012-06-29 | Schmiersystem, brennkraftmaschine und verfahren zum betreiben eines schmiersystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2729671A1 true EP2729671A1 (de) | 2014-05-14 |
EP2729671B1 EP2729671B1 (de) | 2019-05-08 |
Family
ID=46489198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12733457.1A Not-in-force EP2729671B1 (de) | 2011-07-08 | 2012-06-29 | Verfahren zum betreiben eines schmiersystems |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140137834A1 (de) |
EP (1) | EP2729671B1 (de) |
DE (1) | DE102011078843A1 (de) |
WO (1) | WO2013007543A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015209951A1 (de) * | 2015-05-29 | 2016-12-01 | Zf Friedrichshafen Ag | Ölfördersystem eines Kraftfahrzeugs |
EP3483403B1 (de) * | 2017-11-09 | 2022-11-30 | Winterthur Gas & Diesel AG | Schmieranordnung für einen grossdieselmotor |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59106796A (ja) * | 1982-12-08 | 1984-06-20 | Hitachi Ltd | 給油装置 |
IT1232583B (it) * | 1989-02-14 | 1992-02-26 | Fiat Aviazione | Impianto di lubrificazione di organi meccanici particolarmente di impigo aeronautico provvisto di un dispositivo di emergenza atto a garantire una fornitura minima di olio lubrificante |
FR2658577A1 (fr) * | 1990-02-20 | 1991-08-23 | Aerospatiale | Dispositif de lubrification de secours pour reducteur notamment pour boite de transmission principale de giravion. |
US5644916A (en) * | 1993-11-02 | 1997-07-08 | Nissan Motor Co., Ltd. | Hydraulic pressure supply system for variable torque transfer of four-wheel drive vehicle |
US5474041A (en) * | 1994-12-28 | 1995-12-12 | Cummins Engine Company, Inc. | Engine lubrication system with decreased power draw |
US6742503B2 (en) * | 2002-09-18 | 2004-06-01 | Caterpillar Inc. | Dual pressure fluid system and method of use |
DE102005006703A1 (de) | 2005-02-15 | 2006-08-17 | Audi Ag | Vorrichtung und Verfahren zur Schmierölversorgung |
DE102007020807A1 (de) | 2007-05-04 | 2008-11-13 | Audi Ag | Schmiermittelkreislauf einer Brennkraftmaschine, entsprechende Brennkraftmaschine und Verfahren zum Betreiben eines Schmiermittelkreislaufs |
DE102007021436A1 (de) * | 2007-05-08 | 2008-11-13 | Zf Friedrichshafen Ag | Torsionsschwingungsdämpfersystem für den Antriebsstrang eines Fahrzeugs |
US8079437B2 (en) * | 2008-11-17 | 2011-12-20 | Allan Rosman | Hybrid hydraulic drive system with accumulator as the frame of vehicle |
US8346459B2 (en) * | 2009-05-14 | 2013-01-01 | Aikmeng Kuah | Oil pressure controlling apparatus and system comprising same |
GB2480474B (en) * | 2010-05-20 | 2016-10-05 | Ford Global Tech Llc | An oil supply system for an engine |
US8942901B2 (en) * | 2010-12-09 | 2015-01-27 | Gm Global Technology Operations, Llc | Method of controlling a hydraulic control system for a dual clutch transmission |
-
2011
- 2011-07-08 DE DE102011078843A patent/DE102011078843A1/de not_active Withdrawn
-
2012
- 2012-06-29 WO PCT/EP2012/062745 patent/WO2013007543A1/de active Application Filing
- 2012-06-29 EP EP12733457.1A patent/EP2729671B1/de not_active Not-in-force
- 2012-06-29 US US14/131,436 patent/US20140137834A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20140137834A1 (en) | 2014-05-22 |
DE102011078843A1 (de) | 2013-01-10 |
WO2013007543A1 (de) | 2013-01-17 |
EP2729671B1 (de) | 2019-05-08 |
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