WO2017194050A2 - Système de commande et clapet antiretour destiné à être agencé dans un système de commande de ce type - Google Patents

Système de commande et clapet antiretour destiné à être agencé dans un système de commande de ce type Download PDF

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Publication number
WO2017194050A2
WO2017194050A2 PCT/DE2017/100362 DE2017100362W WO2017194050A2 WO 2017194050 A2 WO2017194050 A2 WO 2017194050A2 DE 2017100362 W DE2017100362 W DE 2017100362W WO 2017194050 A2 WO2017194050 A2 WO 2017194050A2
Authority
WO
WIPO (PCT)
Prior art keywords
oil
connecting rod
check valve
control system
pressure
Prior art date
Application number
PCT/DE2017/100362
Other languages
German (de)
English (en)
Other versions
WO2017194050A3 (fr
Inventor
Andreas Nendel
Markus Popp
Michael Knorr
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2017194050A2 publication Critical patent/WO2017194050A2/fr
Publication of WO2017194050A3 publication Critical patent/WO2017194050A3/fr

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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
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded

Definitions

  • the invention relates to a control system for actuating two interacting with an adjusting actuator piston for a device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine, wherein the adjusting element is arranged in a connecting rod of a connecting rod and adjustable by the engine forces of the reciprocating internal combustion engine in two different positions, in which guided in support cylinders single-acting actuator piston, which together with the support cylinders each form a pressure chamber, are in a retracted or extended position, the pressure chambers on the one hand via an oil line in which a check valve is arranged, and a connecting rod bearing with an oil gallery and are connected via a switch between the check valve and the pressure chamber from the oil line branched oil return line with a switching device, so that the switching over device optionally one of the two oil lines is pressure relieved.
  • the invention also relates to a control system for actuating two interacting with an adjusting actuator piston for a device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine, wherein the adjusting element is arranged in a connecting rod eye of a connecting rod and adjustable by the engine forces of the reciprocating internal combustion engine in two different positions, in which the guided in support cylinders single-acting actuator pistons, which together with the support cylinders each form a pressure chamber, are in a retracted or extended position, the pressure chambers on the one hand via an oil line, in which a check valve is arranged, and a connecting rod bearing with an oil gallery and the other over a branched between the check valve and the pressure chamber of the oil line Olgurlauftechnisch are connected to a switching device, so that on the switching means selectively one of the two oil lines is pressure relieved, wherein each of the two Ol Weglauftechnisch is associated with a first aperture.
  • the invention relates to a check valve for a control system of a device for changing the compression ratio of a cylinder unit, which can be arranged in a connecting rod connecting rod of a connecting rod and a pressure chamber of a support cylinder oil hole.
  • the compression ratio ⁇ of a reciprocating internal combustion engine denotes a ratio of a volume of the entire cylinder space to a volume of the compression space.
  • a change in the compression ratio is particularly advantageous for supercharged reciprocating internal combustion engines with spark ignition, since these are in the Overall, a low compression ratio is given with regard to the charge pressure achieved with the charge, wherein the compression is to be increased to improve the thermodynamic efficiency in unfavorable areas of a corresponding engine map.
  • An adjustment of the eccentric by the rotation thereof is effected by the engine forces occurring in the cylinder unit between the connecting rod on the one hand and the piston pin or the crank pin on the other hand, ie load forces resulting from the mass and gas forces. In the working cycle of the cylinder unit, the acting forces change continuously. It is expedient to connect the eccentric with two actuating pistons, which attack on this to its rotation and support via tabs. Thus, the rotation can be assisted by the two adjusting pistons and a return of the eccentric, which can occur due to the forces acting on the eccentric with different directions of force, be avoided.
  • the adjustment of the eccentric in the respective rotary positions is controlled by a switching valve designed as a directional control valve, so that each cylinder unit of the reciprocating internal combustion engine is assigned in each case a switching valve, via which the compression ratio of the cylinder unit is set.
  • a control system and a check valve, which is provided for such a control system, according to the genus described in the respective preamble of claims 1, 3 and 9 are known from DE 10 2012 1 12 434 A1.
  • a device for changing the compression ratio of a reciprocating internal combustion engine is adjusted in one of its two positions.
  • the device is provided for changing the effective length of the connecting rod with a arranged in a connecting rod eye of a connecting rod eccentric.
  • Within the eccentric provided with two diametrically extending tabs extends a piston pin bore, in which a piston connecting a working piston with the connecting rod is arranged. At the tabs in each case engages a piston rod of the device, wherein the piston rods are connected to support piston.
  • Supporting cylinders which receive the support pistons, are supplied with hydraulic fluid from a connecting rod bearing via oil lines, in each of which a non-return valve, which prevents backflow, is supplied. From sections of the oil lines, which extend between the check valve and the pressure chamber, branches off in each case an oil return line. Within a connecting rod of the connecting rod two 2/2-way valves are arranged, each of these is associated with the oil return lines of the directional control valves. In a first exemplary embodiment, both directional control valves are connected to a hydraulic fluid ventilation, via which the pressure medium of the respective oil return line is discharged into the crankcase.
  • the pressure medium is to be passed from a gas-side supporting cylinder in the connecting rod bearing, while the mass-force side support cylinder for the control of the pressure medium, which is located in this, via the associated directional control valve with the crankcase is connectable.
  • DE 10 2010 016 037 A1 discloses a control system for actuating two interacting with an adjusting actuator piston for a device for changing a compression ratio of a reciprocating internal combustion engine, designed as a directional control valve switching valve has a spool, which are similar to two axially spaced apart control piston Outside diameter is provided.
  • the two control pistons connect in their two positions either one of the oil return lines with a vent hole through which the engine oil can be discharged without pressure into an oil pan of the reciprocating internal combustion engine.
  • At one end of the spool there is an actuating device designed as a ballpoint pen mechanism, which is acted upon at an end face with the engine oil pressure of the connecting rod bearing. Disclosure of the invention
  • the object of the invention is to provide an advantageous embodiment and arrangement of the control system, wherein the control system has advantages both in terms of its function and its manufacture and arrangement within the connecting rod.
  • the control system for actuating two cooperating with an adjusting actuator piston for a device for changing the compression ratio of a cylinder unit of a reciprocating internal combustion engine wherein the adjusting arranged in a connecting rod eye of a connecting rod and adjustable by the engine forces the reciprocating internal combustion engine in two different positions is.
  • the single-acting control pistons guided in support cylinders, which together with the support cylinders each form a pressure chamber, are in a retracted or extended position.
  • the pressure chambers are on the one hand via an oil line in which a check valve is arranged, connected via a connecting rod bearing with an oil gallery.
  • the pressure chambers are in each case via an oil return line, which branches off between the check valve and the pressure chamber from the oil line, with a switching device in connection, so that either one of the two oil lines is pressure relieved via the switching device.
  • Pressure medium can thus flow into the pressure chamber via the oil line and the opening check valve. With appropriate switching of the switching device, the pressure medium can flow out of the pressure chamber via a portion of the oil line and the branching from this oil return line.
  • the switching device has a directional control valve which controls both adjusting pistons and has two switching positions, a spool of the directional control valve, via a fluid line extending from the connecting rod bearing, exclusively by at least two different engine oil pressures in cooperation with the return valve. displaced spring in its two switching positions and held in this.
  • the engine oil pressures generated by a variable displacement pump can be a normal engine oil pressure (pwi), a higher control pressure (p ma x) and a reduced reset pressure (pRes) with respect to the engine oil pressure (pwi) single-way valve is acted upon at its front side against the pressure force of the return spring. This for hydraulic actuation of the directional control valve pressure medium is supplied to this from the connecting rod bearing via a fluid bore.
  • a manufacturing technology favorable structure of the control system, because for receiving the directional control valve through the connecting rod is provided in this parallel to the connecting rod bearing eye or to the connecting rod extending receiving bore.
  • To produce the oil lines bores running from the support cylinders to the receiving bore are produced. Since each support cylinder is connected to only one oil line, there are only two holes. In the same way, the fluid bore is made for a drilling process from the connecting rod bearing eye is carried out to the receiving bore.
  • a control module can also be inserted in the receiving bore, which accommodates the directional control valve as well as sections of the oil lines including the check valves, a section of the fluid bore and the oil return lines.
  • each of the two oil return lines to be associated with a first aperture. It is inventively provided that this first aperture is integrated into the respective check valve. Therefore, a diaphragm bore made with a small diameter may already be provided in the check valve and need not be provided within the corresponding oil return conduits formed as a bore within the connecting rod. It is possible to connect the two non-return valves together with the previously mentioned sections of the oil lines and the oil return lines, the section of the fluid line. tion and to provide the directional control valve in a control module, which is insertable into a receiving bore of the connecting rod.
  • a check valve for a control system of a device for varying the compression ratio of a cylinder unit which is arranged in a connecting rod bearing a connecting rod and a pressure chamber of a support cylinder oil hole, according to the patent claim 9, characterized in that in a hollow cylindrical trained check valve housing upstream of a locking body in the reverse direction, at least one radially extending fenden bore is provided, to which an oil return bore leading to a directional valve can be connected.
  • the fine aperture bore can be produced in the hollow cylindrical check valve housing with little manufacturing effort before a blocking body, a valve spring and a check valve cover are used in this and the entire check valve is inserted into the connecting rod.
  • the connecting rod assembly according to DE 10 2012 1 12 434 Al two separate directional control valves and also no fluid bore, via which a hydraulic actuation and determination of this way valves can be done in their switching positions.
  • the shutters shown in a first embodiment are not integrated in the check valves, but arranged within the oil return lines.
  • DE 10 2010 016 037 A1 although a spool valve of the directional control valve is hydraulically actuated, but this is mechanically locked by a ballpoint pen mechanism in its switching positions.
  • both the oil lines and the oil return lines are guided to the support cylinder and connected thereto. In addition, no screens are provided in this control system.
  • the directional control valve in each of the two switching positions in each case connect one of the oil return lines to the connecting rod bearing or the oil supply line.
  • the lubricating oil conveyed by a variable-displacement pump which has initially flowed via the corresponding oil lines and the opening non-return valves into the respective associated pressure chambers of the adjusting cylinders of the adjusting device, is at a corresponding conversion. circuit of the directional control valve in its first or second switching position returned to the connecting rod bearing.
  • the respective connection of the oil return lines via the switching valve with the connecting rod bearing also has the advantage that the adjustment speeds of the adjusting piston are reduced, since a provision is made against the system pressure. As a result, the Aufsetz Anlagenen the support piston are reduced in an advantageous manner.
  • the first diaphragm has a diaphragm bore, which radially penetrates a cylindrically designed check valve housing and opens into the corresponding oil return line device.
  • a second diaphragm is arranged spatially between the diaphragm and a blocking body of the check valve, which opens into a provided in the outer surface of the check valve housing second annular groove.
  • two diaphragm bores are provided in each check valve housing, said diaphragm bores of the first diaphragm and the second diaphragm having different bore diameters.
  • the check valve which is arranged in the leading to the guest-side support cylinder oil line, which is with larger aperture diameter formed second aperture connected to the corresponding oil return line.
  • the orifice bore of the second orifice having a smaller orifice diameter is connected to the corresponding oil return passage.
  • both orifices each open into a provided in an outer circumferential surface of the check valve housing circumferential annular groove, the check valve can be installed in any rotational position in the connecting rod, the corresponding diaphragm is always, as provided, connected to the oil return line.
  • a web extending between the diaphragm bores is formed by the two annular grooves, so that it is prevented that the pressure medium from the unused diaphragm bore also passes into the oil return line.
  • the two orifices can be made with very little effort and consequently also low costs on the clamped check valve body. In contrast, the cost of using two different check valves would be significantly higher, and when installing the check valves in the connecting rod would always make sure that the appropriate oil hole or the corresponding oil return line the right check valve is sorted.
  • the switching device has a control valve of both control piston, two switch positions exhibiting directional control valve and that a spool of the directional control valve via a connec outgoing bearing fluid line exclusively by a normal engine oil pressure (PM), compared to this increased control pressure (p ma x) and with respect to the engine oil pressure (PM) reduced reset pressure (pRes) moved in conjunction with the return spring in its two switching positions and held in this, and that the directional control valve in each of the two switch positions each one of the oil return lines with connecting the connecting rod bearing or the corresponding oil line.
  • the directional control valve can also be actuated mechanically or electromagnetically. In the case of mechanical actuation, this can be achieved, for example, by a curve made element, which is displaced so that it actuates the axially on the connecting rod projecting spool on its front side.
  • FIG. 1 shows a longitudinal section through a connecting rod, wherein the position of a piston pin bearing with respect to the connecting rod can be changed by means of an eccentric lever cooperating with supporting cylinders and a control module is inserted into a receiving bore of the connecting rod.
  • FIG. 1 shows a longitudinal section through a connecting rod, wherein the position of a piston pin bearing with respect to the connecting rod can be changed by means of an eccentric lever cooperating with supporting cylinders and a control module is inserted into a receiving bore of the connecting rod.
  • FIG 2 shows a partial longitudinal section through the control module, in FIG in which a check valve designed according to the invention is arranged
  • Figure 3 is a circuit diagram of a first variant of a control system in which a directional control valve is arranged in the connecting rod, that the longitudinal center axis is parallel to a longitudinal central axis of a connecting rod bearing
  • Figure 4 as a circuit diagram, a second variant of a control system in which the
  • FIG. 5 shows a side view of the check valve of FIG. 2
  • Figure 7 is a first view of a lower end face of the check valve of
  • Figure 8 is a second view of an upper end side of the check valve of
  • a connecting rod for a cylinder unit of a reciprocating internal combustion engine which consists of a partially formed as a connecting rod shank 2 Pleueloberteil 3 and a Pleuelunterteil 4.
  • the connecting rod upper part 3 and the Pleuelunterteil 4 together form a connecting rod bearing eye 5, via which the connecting rod 1 can be stored on a crank pin, not shown, a crankshaft.
  • the connecting rod upper part 3 is provided with a connecting rod eye 6, in which an eccentric body 7, a piston pin, not shown in turn, can be arranged in a piston pin bearing 8 running eccentrically within the eccentric body 7.
  • piston pin a likewise not shown working piston of a cylinder unit of Hubkolbenbrennkraft- machine is guided on the eccentric body 7, wherein a rotation of the eccentric body 7 in a direction to set a relatively low compression ratio and its rotation in the opposite direction to set a higher compression ratio leads.
  • the eccentric body 7 is adjusted by the in the cylinder unit between the connecting rod 1 on the one hand and the piston pin bearing 8 and the crank pin on the other hand occurring engine forces, ie mass and gas forces. During the working process of the cylinder unit, the acting forces change continuously.
  • the adjusting pistons 14 and 15 together with cylinder bores 17 and 18, in which they are guided, support cylinders 19 and 20, each support cylinder 19 and 20 having a pressure chamber 21 and 22, respectively.
  • the support cylinder 19 is, as its diameter reveals, provided on the mass force side, while the support cylinder 20 of the gas-power-side support of the eccentric lever 9 is used.
  • In the pressure chambers 21 and 22 can serve as a hydraulic medium lubricating oil of Hubkolbenbrennkraftmaschi- ne from a con rod bearing 5 arranged in the connecting rod bearing 23 via partially visible in Figure 1 oil lines 24 and 25.
  • a fluid bore 26, which opens just like the oil lines 24 and 25 in a receiving bore 27.
  • boring are understood to mean bores or channels which receive and direct the pressure medium.
  • This receiving bore 27 extends within the connecting rod shaft 2 in the transverse direction to this, ie, parallel to the Pleu- lye 6 and the connecting rod bearing eye 5.
  • a cylindrically shaped control module 28 is inserted in this receiving bore 27, in this receiving bore 27, a cylindrically shaped control module 28 is inserted.
  • a housing 33 of the control module 28 is made of a shaft portion and has a transverse to the longitudinal axis extending valve receiving bore 34 for receiving a directional valve 29.
  • This directional control valve 29 may be formed as a 3/2 or, as shown in Figures 3 and 4, as a 4/2 way valve.
  • the directional control valve 29 has a longitudinally displaceable spool valve 35, which is acted upon by a control thrust at one end face via a section 36 of the fluid bore 26 running within the control module 28 and is supported by a return spring 37 on a cover 38.
  • the connecting rod bearing 23 is provided with circumferentially extending over a portion of the inner circumferential surface groove-shaped recesses 39 to which the fluid bore 26 is connected.
  • An unspecified crank pin of a crankshaft, which is mounted in the connecting rod 1 by means of the connecting rod bearing 23, has an oil outlet bore, which is connected to an oil gallery of the reciprocating internal combustion engine. During one revolution of the crankshaft and thus of the crank pin, this oil outlet bore only comes into contact in phases with the groove-shaped recess 39, whereby pressure pulsations in the fluid bore 26, which can lead to faulty switching of the directional control valve 29, are reduced to a minimum.
  • FIG. 2 shows one of the two provided within the control module 28 check valves, namely the check valve 32 which is disposed in the housing 33 of the control module 28 and consists of a spherical closure member 40, a compression spring 41, a check valve housing 42 and a check valve cover 43.
  • the entire unit is arranged in an extension 44 of a portion 45 of the oil line 24.
  • the other check valve 31, which in the 14 is shown in section, is taken from an identical portion 46 of the oil line 25, as can be seen from the figure 4.
  • first diaphragm 47 and a second diaphragm 48 are provided within the check valve housing 42, which have a first orifice bore 49 of larger diameter and a second orifice bore 50 of smaller diameter.
  • the orifice bores 49 and 50 are spaced apart from one another in the axial direction of the check valve housing 42 and, as stated above, have different bore diameters.
  • the first orifice bore 49 which has a larger bore diameter than the second orifice bore 50, is to be connected via an oil return bore 51 and the oil bore 24 to the support cylinder 19 of the mass force side.
  • the directional control valve 29 is designed as a 4/2 way valve.
  • the pressure medium is supplied in phases to the fluid bore 26 via the groove-shaped recess 39, which extends only over a partial region of the circumference of the connecting rod bearing 23.
  • the oil lines 24 and 25, which open into the pressure chambers 21 and 22 of the support cylinders 19 and 20, so connected to the fluid bore 26 and the directional control valve 29, that they over the alternately opening during the adjustment check valves 31 and 32 allow an oil feed into the pressure chambers 21 and 22, and via the apertures 47 and 48 and the oil return bores 51 and 52 at appropriately switched directional control valve 29 allow an oil return into the fluid bore 26.
  • this solution has the advantage that only the oil lines 24 and 25 are connected to the pressure chambers 21 and 22, while, as already explained, the two oil return holes 51 and 52 only between the disposed within the oil lines 24 and 25 check valves 31 and Run 32 and the directional control valve 29.
  • the directional control valve 29 is hydraulically actuated via the fluid bore 26, and that this is achieved in the two switching positions. gene of the directional control valve 29 from the oil return holes 51 and 52 discharged pressure fluid again the fluid bore 26 and thus the connecting rod bearing 23 is fed so that oil pressure losses in the connecting rod bearing 23 and consequently in the oil gallery are avoided.
  • FIG. 4 Another embodiment of the hydraulic control system is shown in FIG.
  • This hydraulic circuit diagram of Figure 4 assumes that the fluid bore from the connecting rod bearing 23 is supplied continuously pressure medium from an oil gallery of the reciprocating internal combustion engine. Also in this case, the pressure pulsations occurring in the fluid bore 26 should be reduced to a minimum.
  • an end face 53 of the directional valve 29 provided for the hydraulic actuation is aligned with the connecting-rod bearing eye 5.
  • the two diaphragm bores 49 and 50 each open into an annular groove 54 and 55 formed on the outer lateral surface of the check valve housing 42, which are thus separated from one another by a peripheral web 56.
  • through-holes 57 are provided in the check valve cover 43.
  • the check valve housing 42 has an inlet bore 58.
  • valve receiving bore 34 is designed as a blind hole.
  • the spool 35 has an end face 55, which forms a circular bearing surface 60 for the return spring 37.
  • the spool 35 which is displaceably guided on the inner lateral surface 61, also has the end face 53, which can be acted upon by a control pressure from control connections 62 and 63, wherein the control pressure is a normal engine oil pressure PM, a reduced control pressure pi_ow or an increased control pressure pmGH and these different control pressures via a variable in their delivery volume oil pump, which is not shown, are created.
  • the control terminals 62 and 63 are connected to the already mentioned, provided in the connecting rod 2 fluid bore 26, which emanates from an oil gallery of the reciprocating internal combustion engine.
  • the spool 35 has control edges 64 and 65.
  • the spool 35 has, in addition to the annular end face 53, a circular end face 68, which firstly acts only on the end face 53 and then after a longitudinal displacement of the spool on both the end face 53 and the end face 68 when subjected to a control pressure is charged.
  • the described longitudinal displacement is caused by an increased control pressure p ma x.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un système de commande pour l'actionnement de deux pistons de réglage (14 et 15) coopérant avec un élément de réglage pour un dispositif de modification du rapport volumétrique d'une unité cylindre d'un moteur alternatif à combustion interne. Le système comprend un élément de réglage qui est agencé dans une tête d'une bielle et qui peut être déplacé par les forces du groupe turbomoteur du moteur alternatif à combustion interne dans deux positions différentes, dans lesquelles les pistons de réglage (14 et 15) à simple effet, qui sont guidés dans les cylindres de support (19 et 20) et qui forment conjointement avec les cylindres de support (19 et 20) une chambre de pression (21, 22) respective, se situent dans une position rentrée ou sortie. Les chambres de pression (21 et 22) sont reliées d'une part à une canalisation d'huile chacune par l'intermédiaire d'une conduite d'huile (24, 25), dans laquelle un clapet antiretour (31, 32) est agencé, et d'un coussinet de bielle (23), et d'autre part à un dispositif de basculement par l'intermédiaire d'une conduite de retour d'huile (51, 52) bifurquant de la conduite d'huile (24, 25) entre le clapet antiretour (31, 32) et la chambre de pression (21, 22), de telle manière que le dispositif de basculement permet de décharger la pression sélectivement d'une des deux conduites d'huile (24, 25). L'objet de l'invention est d'obtenir une configuration et un agencement avantageux du système de commande, lequel présente des avantages aussi bien en ce qui concerne son fonctionnement que sa fabrication et son agencement à l'intérieur de la bielle. Le dispositif de basculement comprend à cet effet un distributeur (29) commandant les deux pistons de réglage (14 et 15) et présentant deux positions de basculement, et un tiroir de commande du distributeur (29) est déplacé dans ses deux positions de basculement au moyen d'une conduite de fluide (26) sortant du coussinet de bielle (23), exclusivement en raison d'au moins deux pressions de commande différentes en coopération avec un ressort de rappel (37), et y est maintenu.
PCT/DE2017/100362 2016-05-13 2017-05-02 Système de commande et clapet antiretour destiné à être agencé dans un système de commande de ce type WO2017194050A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016208329.5A DE102016208329B4 (de) 2016-05-13 2016-05-13 Steuersystem und Rückschlagventil zur Anordnung in einem derartigen Steuersystem
DE102016208329.5 2016-05-13

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WO2017194050A2 true WO2017194050A2 (fr) 2017-11-16
WO2017194050A3 WO2017194050A3 (fr) 2018-01-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3546723A1 (fr) * 2018-03-29 2019-10-02 ECO Holding 1 GmbH Bielle pour un moteur à combustion interne à compression variable
US10954850B2 (en) 2018-03-29 2021-03-23 ECO Holding 1 GmbH Connecting rod for a variable compression internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010016037A1 (de) 2010-03-19 2011-09-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil
DE102012112434A1 (de) 2012-12-17 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstangenanordnung sowie Verfahren zum Entlüften eines Hydraulikzylinders einer derartigen Pleuelstangenanordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012112481A1 (de) * 2012-12-18 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rückschlagventil
DE102013206513A1 (de) * 2013-04-12 2014-10-16 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil
DE102013105391B4 (de) * 2013-05-27 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil
DE102013210494B4 (de) * 2013-06-06 2014-12-31 Schaeffler Technologies Gmbh & Co. Kg Umschalteinrichtungen für Schaltventile
DE102013107127A1 (de) * 2013-07-05 2015-01-08 Hilite Germany Gmbh Pleuel für eine zweistufige variable Verdichtung
DE102013111617B4 (de) * 2013-10-22 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem solchen Umschaltventil
DE102013021065A1 (de) * 2013-12-18 2015-06-18 Fev Gmbh Kolbenmaschine mit Stützkolben
DE102014220175A1 (de) * 2014-10-06 2016-04-07 Schaeffler Technologies AG & Co. KG Steuersystem

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010016037A1 (de) 2010-03-19 2011-09-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil
DE102012112434A1 (de) 2012-12-17 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pleuelstangenanordnung sowie Verfahren zum Entlüften eines Hydraulikzylinders einer derartigen Pleuelstangenanordnung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3546723A1 (fr) * 2018-03-29 2019-10-02 ECO Holding 1 GmbH Bielle pour un moteur à combustion interne à compression variable
US10954850B2 (en) 2018-03-29 2021-03-23 ECO Holding 1 GmbH Connecting rod for a variable compression internal combustion engine

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