WO2012175100A1 - Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne - Google Patents

Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne Download PDF

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Publication number
WO2012175100A1
WO2012175100A1 PCT/EP2011/006249 EP2011006249W WO2012175100A1 WO 2012175100 A1 WO2012175100 A1 WO 2012175100A1 EP 2011006249 W EP2011006249 W EP 2011006249W WO 2012175100 A1 WO2012175100 A1 WO 2012175100A1
Authority
WO
WIPO (PCT)
Prior art keywords
compression ratio
internal combustion
combustion engine
hydraulic
actuator
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
PCT/EP2011/006249
Other languages
German (de)
English (en)
Inventor
Dietmar Schröer
Friedemann Wolpers
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.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Publication of WO2012175100A1 publication Critical patent/WO2012175100A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0423—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/042—Controlling the temperature of the fluid
    • F15B21/0427—Heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/851—Control during special operating conditions during starting

Definitions

  • the invention relates to an adjusting device for variably setting at least one compression ratio of an internal combustion engine specified in the preamble of claim 1.
  • DE 601 27 919 T2 discloses a mechanism which makes it possible to set different compression ratios for a reciprocating internal combustion engine having a piston which can be moved via a stroke in the engine and a
  • Piston pin has, as well as containing a crankshaft, which converts the stroke movement of the piston into rotary motion.
  • the crankshaft has a crank pin, wherein the
  • a variable compression ratio generating mechanism includes a plurality of links mechanically connecting the piston pin to the crankpin.
  • the mechanism further includes a control shaft to which an eccentric cam is attached so that a center of the eccentric cam is eccentric to a center of the control shaft.
  • a control link is provided which is connected at one end to one of the plurality of links and is connected at the other end to the eccentric cam.
  • an actuator is provided which drives the control shaft within a predetermined controlled angular range and keeps the control shaft at a desired angular position so that a compression ratio of the engine continuously decreases when the control shaft is driven in a first rotational direction and the compression ratio continuously increases. when the control shaft is driven in a second direction of rotation, opposite to the first direction of rotation.
  • the actuator comprises a reciprocating block slider connected to the control shaft at a first end portion.
  • the Actuating member further includes a rotary member which is in meshing engagement with the second end portion of the slider via a meshingly intermeshing pair of screw thread portions, so that rotational movements of the rotary member are converted into axial sliding movements of the slider to drive the control shaft in the first or second rotational directions ,
  • the operating member includes a hydraulic pressure chamber facing an axial end surface of the second end portion of the sliding member, so that a working fluid pressure in the hydraulic chamber pushes the sliding member in the same axial direction as the acting direction of a reciprocating load during the downward stroke of the piston acts on the sliding member, wherein the reciprocating load acts on the sliding member during the upward and downward thrusts of the piston in axial directions of the sliding member.
  • a reciprocating engine which comprises a variable compression ratio mechanism for regulating an engine compression ratio in accordance with an engine load.
  • the reciprocating motor includes a main oil passage and an oil pressure source hydraulically connected to the main oil passage to supply pressurized lubricating oil to the main oil passage.
  • the reciprocating engine includes an oil supply passage that hydraulically connects the main oil passage to a lubricated element.
  • an oil pressure control device for controlling an oil pressure in the main oil passage is provided.
  • the oil pressure control apparatus includes an oil drain passage for discharging a lubricating oil from the main oil passage, and a control valve for regulating an oil drain passage corresponding to the regulated engine compression ratio in response to the regulated engine compression ratio.
  • Compression ratio of an internal combustion engine have further potential, the setting of the compression ratio and their
  • This object is achieved by an adjusting device for variably setting at least one compression ratio of an internal combustion engine having the features of patent claim 1.
  • Compression ratio of an internal combustion engine in particular a reciprocating internal combustion engine, comprises at least one hydraulically actuable actuator, which for adjusting the compression ratio with a
  • hydraulic working fluid that is a hydraulic fluid to supply.
  • At least one heat exchange device is provided, by means of which the hydraulic working medium can be tempered.
  • the temperature of the hydraulic working medium can be adjusted by means of the heat exchange device, so that the temperature can be maintained, for example, at a predefinable desired value and / or in a predefinable desired temperature range.
  • the adjusting device according to the invention enables an improved setting of the compression ratio, in particular because it is undesirably low
  • Temperatures of the working medium can be avoided or periods in which the working medium undesirable temperatures and associated undesirable viscosities can be kept particularly low.
  • Heat exchange device possible to avoid too high temperatures, resulting for example from power losses of the actuator. As a result, the risk of a particular thermal destruction of the working medium and / or a Destruction of seals of the adjusting device can be avoided. As a result, a particularly long life of the adjusting device according to the invention is realized, via which the compression ratio can be set precisely and defined. In other words, the adjusting device has a very high functional performance safety, which is accompanied by the precise and quick adjustability of the compression ratio to desired target values with low fuel consumption and thus low C0 2 emissions of the internal combustion engine.
  • the heat exchange device can thus be used on the one hand for heating in particular at relatively low external or ambient temperatures and for cooling in particular at high ambient or ambient temperatures, so that undesirably high or low viscosities of the working medium and leaks and
  • the internal combustion engine is designed for example as a so-called multi-link engine.
  • the internal combustion engine designed as a reciprocating internal combustion engine comprises at least one cylinder, in which a piston is received translationally relative to the cylinder movable.
  • the piston is articulated via a connecting rod with a crankshaft, so that translational movements of the piston can be converted into rotational movements of the crankshaft.
  • crankshaft is rotatably mounted on a crankcase of the internal combustion engine about an axis of rotation relative to the crankcase.
  • the one hand articulated coupled to the piston rod is on the other hand articulated coupled to a transverse lever, which in turn is rotatably mounted on a crank pin of the crankshaft relative to the crank pin.
  • the transverse lever articulated on the one hand with the connecting rod is at least indirectly coupled or couplable to the actuator of the adjusting device.
  • the transverse lever is articulated, for example, with a Maupleuel, which is coupled to a control shaft of the actuating device.
  • the control shaft is formed for example as an eccentric shaft, wherein the Maupleuel is rotatably mounted on an eccentric pin of the eccentric shaft relative to the eccentric pin.
  • the actuator of the actuator is coupled to the control shaft or the eccentric shaft or coupled and can cause a rotation of the control shaft about its axis of rotation. This results in a rotation of the transverse lever relative to the crank pin, which in turn causes a displacement of the piston in the cylinder relative to the
  • Cylinder is effected.
  • the compression ratio is set or adjusted from a first value to a second, different value.
  • the drawing shows in the figure a schematic diagram of an adjusting device for variably setting at least one compression ratio of a
  • the figure shows an adjusting device 10 for variably setting at least one compression ratio of an example designed as a reciprocating internal combustion engine internal combustion engine for a motor vehicle, in particular a passenger car.
  • the adjusting device 10 comprises a hydraulic actuator 12, which translationally via transmission elements with a in a cylinder of the internal combustion engine relative to the cylinder
  • the hydraulic actuator 12 is a translational displacement of the piston in the cylinder relative to the cylinder effected, so that thereby sets the compression ratio of the cylinder and thus can be adjusted from a first value to a second, to different value.
  • the hydraulic actuator 12 is to be supplied with a hydraulic fluid in the form of hydraulic oil.
  • the actuator 10 includes a tank 14 for receiving and storing the hydraulic oil. In the figure, non-pressurized paths of the hydraulic oil are indicated by dashed lines, while high-pressure paths of the hydraulic oil are shown by solid lines.
  • the adjusting device 10 comprises a pump 16, by means of which hydraulic oil sucked from the tank 14, pressurized and conveyed to a pressure accumulator 18 of the adjusting device 10.
  • the pressurized hydraulic oil can be stored under pressure.
  • the pressure accumulator 18 can receive the hydraulic oil, so that a level 20 is present in the pressure accumulator 18.
  • a motor 22 is provided, which is to be controlled or regulated by means of a control unit 24 of the adjusting device 10.
  • the adjusting device 10 further comprises a pressure sensor 26, by means of which the pressure of the hydraulic oil and in particular the pressure of the hydraulic oil is to be detected in the pressure accumulator 18.
  • the pressure sensor 26 is coupled to the control unit 24 so that the control unit 24 can control or regulate the pump 16 via the motor 22 as a function of the detected pressure of the hydraulic oil, in particular in the pressure accumulator 18. This can ensure that in the accumulator 18 at least almost always a sufficient amount of hydraulic oil is present and correspondingly at least almost always a corresponding pressure of the hydraulic oil is available to actuate the hydraulic actuator 12 and to set or adjust the compression ratio over it ,
  • the adjusting device 10 comprises a valve 28, which, for example, as
  • Proportional valve is formed. Via the valve 28, the hydraulic actuator 12 with the pressure accumulator 18 can be coupled. If a currently set compression ratio is to be maintained, the hydraulic actuator 12 is fluidically shut off from the pressure accumulator 18, so that the hydraulic actuator 12 is not supplied with hydraulic oil. If an adjustment of the compression ratio is desired, then the fluidic connection between the hydraulic actuator 12 and the accumulator 18 is made by means of the valve 28, so that hydraulic oil can flow from the pressure accumulator 18 to the hydraulic actuator 12 to drive it and thereby the compression ratio to be able to adjust. At the same time, the same hydraulic oil volume is supplied to the hydraulic tank 14 at low pressure from the hydraulic actuator 12 via the valve 18.
  • the adjusting device 10 comprises a pressure reducer 30, which in
  • Flow direction of the hydraulic oil is arranged in front of a pressure accumulator 18 to the hydraulic actuator 12 between the pressure accumulator 18 and the hydraulic actuator 12 and in particular between the pressure accumulator 18 and the valve 28.
  • the pump 16 comprises an integrated pulsation damper and / or an integrated check valve and / or an integrated pressure relief valve, so that unwanted pulsations of the hydraulic oil and / or undesirable
  • the adjusting device 10 comprises a heat exchange device with
  • Temperature control device 32 by means of which the hydraulic oil is temperature controlled. For example, if relatively low ambient temperatures prevail, then the hydraulic oil may have a relatively high viscosity.
  • the temperature control device 32 now makes it possible to keep or minimize a period in which this undesirably high viscosity of the hydraulic oil is present since the hydraulic oil can be heated by means of the temperature control device 32. As a result, undesirably low actuating speeds with which the compression ratio can be adjusted can be avoided due to the relatively high viscosity of the hydraulic oil.
  • Temperature control device 32 to cool, thereby thermal destruction of the hydraulic oil as well as leaks and damage
  • Heat exchange device with temperature control device 32 may on the other hand with a lubricant circuit, in particular oil circuit, the internal combustion engine and / or preferably with a coolant circuit, in particular a
  • Cooling water circuit to be fluidly coupled to the internal combustion engine.
  • the coolant circuit heats up when you start (activate) the
  • Coolant on the hydraulic oil particularly fast that is in a very short time, can be heated. Also, for quick heating of the hydraulic oil by means of a corresponding type of heat exchanger, the heat of the exhaust gas of the
  • Internal combustion engine can be used.
  • Temperature control device 32 may be arranged upstream of the hydraulic actuator 12 and downstream of the pump 16 in the conveying direction of the hydraulic oil.
  • the heat exchange device with temperature control device 32 is arranged upstream of the pump 16. This has the advantage that thereby the work to be performed by the pump 16 is facilitated in particular in a warm-up phase after a cold start of the internal combustion engine, since the hydraulic oil is heated particularly quickly. This keeps the power consumption of the pump 16 low, resulting in low fuel consumption and low CO 2 emissions of the
  • the adjusting device 10 preferably comprises a bypass device, a so-called bypass, which is preferably integrated in the valve 28.
  • a bypass device a so-called bypass
  • the hydraulic oil can circulate in a hydraulic circuit 34 of the adjusting device 10, bypassing the hydraulic actuator 12. This means that the hydraulic oil over the
  • Bypass device can bypass the hydraulic actuator 12 without driving it.
  • the hydraulic oil at least almost always or in predetermined operating states of the adjusting device 10 and the
  • a circulation of the hydraulic oil can be effected from a tank 14 via the bypass device bypassing the hydraulic actuator 12 back to the tank 14, for example by means of the pump 16, so that a particularly rapid heating of at least almost all hydraulic oil feasible is.
  • An exchange between cold and warm hydraulic oil in the hydraulic actuator 12 can be achieved, for example, by alternately moving the hydraulic actuator 12 by a small amount, for example within setting tolerances.
  • a switchable bypass in the hydraulic actuator 12 may be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un dispositif de réglage (10) pour le réglage variable au moins d'un taux de compression d'un moteur à combustion interne, notamment d'un moteur à combustion interne à pistons alternatifs, comprenant au moins un actionneur (12) à commande hydraulique, cet actionneur pouvant être alimenté en un milieu de travail hydraulique pour régler le taux de compression, au moins un dispositif échangeur thermique (32) permettant de thermoréguler le milieu de travail hydraulique.
PCT/EP2011/006249 2011-06-21 2011-12-10 Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne Ceased WO2012175100A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011104934.0 2011-06-21
DE102011104934A DE102011104934A1 (de) 2011-06-21 2011-06-21 Stelleinrichtung zum variablen Einstellen eines Verdichtungsverhältnisses einer Verbrennungskraftmaschine

Publications (1)

Publication Number Publication Date
WO2012175100A1 true WO2012175100A1 (fr) 2012-12-27

Family

ID=45319066

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/006249 Ceased WO2012175100A1 (fr) 2011-06-21 2011-12-10 Dispositif de réglage permettant un réglage variable d'un taux de compression d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102011104934A1 (fr)
WO (1) WO2012175100A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT517511A1 (de) 2015-08-10 2017-02-15 Avl List Gmbh Hubkolbenmaschine, insbesondere brennkraftmaschine
CN108603438B (zh) 2015-12-14 2022-01-25 Avl 里斯脱有限公司 长度可调节的连杆、往复式活塞发动机和车辆
AT519011B1 (de) 2016-05-31 2018-03-15 Avl List Gmbh Hubkolbenmaschine
DE102016008306A1 (de) 2016-07-06 2018-01-11 Avl List Gmbh Pleuel mit verstellbarer Pleuellänge
AT519360B1 (de) * 2017-02-24 2018-06-15 Avl List Gmbh Verfahren zum Betrieb einer Hubkolbenmaschine mit wenigstens einer hydraulisch längenverstellbaren Pleuelstange

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309233A1 (de) * 2002-03-07 2003-10-23 Caterpillar Inc Strömungsmittelsystem für einen Verbrennungsmotor
US20050011478A1 (en) * 2003-07-14 2005-01-20 Neal Timothy L. Engine with dual oiling and hydraulic valves
JP2005069181A (ja) * 2003-08-27 2005-03-17 Toyota Motor Corp 可変圧縮比内燃機関
DE602004004933T2 (de) 2003-02-24 2007-06-14 Nissan Motor Co., Ltd., Yokohama Brennkraftmaschine mit variablem Verdichtungsverhältnis
WO2007074612A1 (fr) * 2005-12-27 2007-07-05 Aisin Seiki Kabushiki Kaisha Dispositif pour commander le moment d'ouverture et de fermeture d'une soupape
DE60127919T2 (de) 2000-10-31 2007-08-30 Nissan Motor Co., Ltd., Yokohama Mechanismus für das variable Verdichtungsverhältnis einer Brennkraftmaschine
JP2008208762A (ja) * 2007-02-26 2008-09-11 Mazda Motor Corp エンジンの潤滑装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60127919T2 (de) 2000-10-31 2007-08-30 Nissan Motor Co., Ltd., Yokohama Mechanismus für das variable Verdichtungsverhältnis einer Brennkraftmaschine
DE10309233A1 (de) * 2002-03-07 2003-10-23 Caterpillar Inc Strömungsmittelsystem für einen Verbrennungsmotor
DE602004004933T2 (de) 2003-02-24 2007-06-14 Nissan Motor Co., Ltd., Yokohama Brennkraftmaschine mit variablem Verdichtungsverhältnis
US20050011478A1 (en) * 2003-07-14 2005-01-20 Neal Timothy L. Engine with dual oiling and hydraulic valves
JP2005069181A (ja) * 2003-08-27 2005-03-17 Toyota Motor Corp 可変圧縮比内燃機関
WO2007074612A1 (fr) * 2005-12-27 2007-07-05 Aisin Seiki Kabushiki Kaisha Dispositif pour commander le moment d'ouverture et de fermeture d'une soupape
JP2008208762A (ja) * 2007-02-26 2008-09-11 Mazda Motor Corp エンジンの潤滑装置

Also Published As

Publication number Publication date
DE102011104934A1 (de) 2012-12-27

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