EP2173989B1 - Vorrichtung zur direkt am kolben stattfindenden messung der effektiven volumetrischen rate eines motors mit variablem kompressionsverhältnis - Google Patents

Vorrichtung zur direkt am kolben stattfindenden messung der effektiven volumetrischen rate eines motors mit variablem kompressionsverhältnis Download PDF

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Publication number
EP2173989B1
EP2173989B1 EP08805485.3A EP08805485A EP2173989B1 EP 2173989 B1 EP2173989 B1 EP 2173989B1 EP 08805485 A EP08805485 A EP 08805485A EP 2173989 B1 EP2173989 B1 EP 2173989B1
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Prior art keywords
engine
piston
compression ratio
variable compression
cylinder
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EP08805485.3A
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English (en)
French (fr)
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EP2173989A1 (de
Inventor
Vianney Rabhi
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    • 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
    • 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
    • F02B75/048—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable crank stroke length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F01B9/047—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft with rack and pinion
    • 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
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating, or supervising devices
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for

Definitions

  • the present invention relates to a device for measuring directly on the piston the effective volumetric ratio of at least one cylinder of a variable compression ratio engine which comprises at least one sensor fixed on the cylinder block of said engine which detects the passage of at least one target secured to the piston of said engine, said sensor cooperating with at least one angular position sensor of the crankshaft of said engine, and a computer.
  • the mechanical transmission device for variable compression ratio engine comprises a piston secured in its lower part of a transmission member cooperating on the one hand with a rolling guide device, and on the other hand with a toothed wheel secured to a connecting rod for transmitting the movement between said piston and said connecting rod.
  • the mechanical transmission device for variable compression ratio engine comprises at least one cylinder in which moves a piston which is secured in its lower part, a transmission member cooperating on the one hand by means of a small rack with a rolling guide device, and secondly by means of another rack of large dimension with a toothed wheel secured to a connecting rod.
  • Said mechanical transmission device for variable compression ratio engine also comprises at least one control rack cooperating with the gear wheel, means for fixing the piston on the transmission member which provide a clamping preload, connecting means which make it possible to stiffen the teeth of the racks, and means for reinforcing and lightening the structure of the toothed wheel.
  • a sensor may be provided for measuring the position of the control rack of the variable compression ratio engine to inform the management computer of said engine on the position of said control rack.
  • variable compression ratio engine comprises more moving parts than that of a conventional engine with a variable compression ratio.
  • fixed compression This feature extends the chain of dimensions on which depends the position of the piston relative to the cylinder head.
  • variable compression ratio engine Taking into account the large number of moving parts of the variable compression ratio engine, the sum of the functional clearances between said parts, differential expansions between said parts which are subjected to variable operating temperatures, wearings and matings which may be subject to the contact surfaces of said parts during the life of said engine, it is not possible to guarantee that the value of the volumetric ratio of said engine reported by a sensor which measures the position of the control rack of said engine corresponds to the effective volumetric ratio said engine.
  • the device according to the invention makes it possible to measure the effective volumetric ratio of at least one cylinder of the variable compression ratio engine directly on the piston while the latter performs an alternative translatory movement in said cylinder.
  • the device allows, from the capture of two signals and a calculation performed by a computer, to inform the management system of the variable compression ratio engine on the effective altitude of the piston to Top Dead Center (TDC) with respect to the cylinder head of said engine.
  • TDC Top Dead Center
  • the device for measuring the effective compression ratio of at least one cylinder of a variable compression ratio engine comprises at least one target passage sensor fixed on the cylinder block and located under the running surface of the synchronized roller of a rolling guide device which detects the passage of at least one target located on a transmission member integral with the piston of said engine, said target passage sensor cooperating with at least one angular position sensor crankshaft said engine, and a calculator.
  • the device for measuring the effective compression ratio of at least one cylinder of a variable compression ratio engine comprises a target which is placed on the face of the transmission member which comprises a small rack .
  • the device for measuring the effective compression ratio of at least one cylinder of a variable compression ratio engine comprises a target which consists of a hole or the like formed in the transmission member.
  • the device for measuring the effective compression ratio of at least one cylinder of a variable compression ratio engine comprises a target which consists of a pin or the like integral with the transmission member.
  • Figure 1 is a schematic sectional view illustrating the main components of the device for measuring the effective volumetric ratio of at least one cylinder of a variable compression ratio engine according to a variant of the invention, and their positioning in the engine at a rate variable compression.
  • FIG. 1 a device 90 for measuring directly on the piston 2 the effective volumetric ratio of at least one cylinder 110 of a variable compression ratio engine.
  • variable compression ratio engine comprises a mechanical transmission device 1 comprising in the lower part of the piston 2 a transmission 3 secured to said piston and cooperating, on the one hand with a rolling guide device 4, and on the other hand with a toothed wheel 5.
  • the toothed wheel 5 cooperates with a connecting rod 6 connected to a crankshaft 9 in order to carry out the transmission of the movement between the piston 2 and said crankshaft 9.
  • the toothed wheel 5 cooperates opposite the transmission member 3 with a control rack 7 whose vertical position relative to the cylinder block 100 is controlled by a control device 12 comprising a control cylinder 8, the piston of which of cylinder 13 is guided in a cylinder cylinder 112 arranged in the cylinder block 100.
  • the control cylinder 8 consists of an upper cylinder rod 10, a lower cylinder rod 16, a piston cylinder 13 and a control rod 20.
  • the transmission member 3 integral with the piston 2 is provided on one of its faces with a first large-sized rack 35 whose teeth 34 cooperate with those 51 of the toothed wheel 5.
  • the transmission member 3 comprises, opposite the first rack 35, a second rack 37 whose teeth 38 of small dimensions cooperate with those of a roller 40 of the rolling guide device 4.
  • the cylinder block 100 is secured to a support 41 comprising racks 46 ensuring the synchronization of the displacement of the roller 40 of the rolling guide device 4 with that of the piston 2.
  • the device 90 for measuring the effective volumetric ratio of at least one cylinder 110 of a variable compression ratio engine according to the present invention comprises at least one target passage sensor 91 fixed on the cylinder block 100.
  • the device 90 for measuring the effective volumetric ratio of at least one cylinder 110 of a variable compression ratio engine comprises at least one target 92 secured to the piston 2.
  • the target passage sensor 91 is provided to detect the passage of the target 92 secured to the piston 2.
  • the device 90 for measuring the effective volumetric ratio of at least one cylinder 110 of a variable compression ratio engine comprises at least one angular position sensor of the crankshaft 93, and at least one calculator 94.
  • the target passage sensor 91 is provided to cooperate with the angular position sensor of the crankshaft 93 and the computer 94.
  • the target passage sensor 91 is located under the running surface of the synchronized roller 40 of the rolling guide device 4 of the variable compression ratio engine.
  • the target 92 integral with the piston 2, is located on the transmission member 3 of the mechanical transmission device 1 of the variable compression ratio engine.
  • the target 92 is placed on the face of the transmission member 3 which comprises the small-sized rack 37 and opposite the teeth 34 of the first large rack 35.
  • the target 92 may consist of a hole or the like formed in the transmission member 3.
  • the target 92 may consist of a pin or the like integral with the transmission member 3.
  • the target passage sensor 91 attached to the cylinder block 100 is based on the principle of the Hall effect.
  • the target passage sensor 91 may consist of a coil cyclically traversed by an electric current to detect the passage of the target 92, said current flowing through said coil when the target 92 passes in front of said coil, said target 92 being made of a material that creates a magnetic field.
  • the target passage sensor 91 may consist of two superimposed coils defining a miniature electric current transformer, the current transformation ratio making it possible to detect the passage of the target 92, said target being constituted by a magnetic material.
  • the target passage sensor 91 may be optical detection, capacitive type, or any other type known to those skilled in the art.
  • the operation of the device 90 for measuring directly on the piston 2 the effective volumetric ratio of at least one cylinder 110 of the variable compression ratio engine is as follows:
  • the target 92 secured to the piston 2 passes in front of the target passage sensor 91 at each rise and each descent of said piston 2 in its cylinder 110.
  • the computer 94 which records - via a signal transmitted by the crank angular position sensor 93 - the position angular of the crankshaft 9 corresponding to the passage of said target 92, in front of the target passage sensor 91.
  • said calculator can determine the position of the piston cap 2 relative to the cylinder head when the piston 2 will have reached its Top Dead Center (TDC), and therefore, the effective volumetric ratio of the engine.
  • TDC Top Dead Center
  • each cylinder 110 of the variable compression ratio engine is placed, on assembly, each cylinder 110 of the variable compression ratio engine to a known volumetric ratio and found by means of a suitable metrology or by any other means.
  • the motor is rotated and the computer 94 can definitively establish the relation that there is for each cylinder 110 of said engine between the volumetric ratio of said cylinder 110, the point of passage of the target 92 of the piston 2 of said cylinder 110 in front of the target passage sensor 91, and the angular position of the crankshaft 9 of said engine.
  • the computer 94 can calculate at any time the effective volumetric ratio of each cylinder 110.

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

Claims (4)

  1. Vorrichtung, die das Messen des effektiven Verdichtungsverhältnisses mindestens eines Zylinders (110) eines Motors mit variablem Verdichtungsverhältnis erlaubt, wobei der Motor mit variablem Verdichtungsverhältnis eine mechanische Übertragungsvorrichtung (1) enthält, die im unteren Bereich eines Kolbens (2) ein Übertragungselement (3) aufweist, das einerseits mit einer eine synchronisierte Rolle (40) aufweisenden Rollführungsvorrichtung (4) und andererseits mit einem Zahnrad (5) und einer fest mit einer Kurbelwelle (9) verbundenen Pleuelstange (6) zusammenwirkt, dadurch gekennzeichnet, dass sie mindestens einen Zieldurchgangssensor (91), der am Zylindergehäuse (100) befestigt ist und sich unter der Rollfläche der synchronisierten Rolle (40) der Rollführungsvorrichtung (4) befindet, der den Durchgang mindestens eines Ziels (92) erfasst, das sich am fest mit dem Kolben (2) des Motors verbundenen Übertragungselement (3) befindet, wobei der Zieldurchgangssensor (91) mit mindestens einem Kurbelwelle-Winkelpositionssensor (93) des Motors zusammenwirkt, und einen Rechner (94) enthält.
  2. Vorrichtung, die das Messen des effektiven Verdichtungsverhältnisses mindestens eines Zylinders eines Motors mit variablem Verdichtungsverhältnis nach Anspruch 1 erlaubt, dadurch gekennzeichnet, dass das Ziel (92) auf der Seite des Übertragungselements (3) angeordnet ist, die eine Zahnstange geringer Abmessung (37) aufweist.
  3. Vorrichtung, die das Messen des effektiven Verdichtungsverhältnisses mindestens eines Zylinders eines Motors mit variablem Verdichtungsverhältnis nach Anspruch 1 erlaubt, dadurch gekennzeichnet, dass das Ziel (92) aus einem Loch oder dergleichen besteht, das im Übertragungselement (3) ausgespart ist.
  4. Vorrichtung, die das Messen des effektiven Verdichtungsverhältnisses mindestens eines Zylinders eines Motors mit variablem Verdichtungsverhältnis nach Anspruch 1 erlaubt, dadurch gekennzeichnet, dass das Ziel (92) aus einem fest mit dem Übertragungselement (3) verbundenen Stift oder dergleichen besteht.
EP08805485.3A 2007-04-16 2008-04-16 Vorrichtung zur direkt am kolben stattfindenden messung der effektiven volumetrischen rate eines motors mit variablem kompressionsverhältnis Active EP2173989B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0702731A FR2914950B1 (fr) 2007-04-16 2007-04-16 Dispositif permettant de mesurer directement sur le piston le rapport volumetrique effectif d'un moteur a taux de compression variable.
US90778407P 2007-04-17 2007-04-17
PCT/FR2008/000530 WO2008145837A1 (fr) 2007-04-16 2008-04-16 Dispositif permettant de mesurer directement sur le piston le rapport volumétrique effectif d'un moteur a taux de compression variable

Publications (2)

Publication Number Publication Date
EP2173989A1 EP2173989A1 (de) 2010-04-14
EP2173989B1 true EP2173989B1 (de) 2014-10-15

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EP08805485.3A Active EP2173989B1 (de) 2007-04-16 2008-04-16 Vorrichtung zur direkt am kolben stattfindenden messung der effektiven volumetrischen rate eines motors mit variablem kompressionsverhältnis

Country Status (10)

Country Link
US (1) US8065909B2 (de)
EP (1) EP2173989B1 (de)
JP (1) JP5167339B2 (de)
KR (1) KR101387809B1 (de)
CN (1) CN101680364B (de)
AU (1) AU2008257318B2 (de)
CA (1) CA2681631C (de)
ES (1) ES2527947T3 (de)
FR (1) FR2914950B1 (de)
WO (1) WO2008145837A1 (de)

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DE102010032486A1 (de) * 2010-07-28 2012-02-02 Daimler Ag Verfahren zum Betreiben einer Hubkolbenmaschine
FR2969705B1 (fr) * 2010-12-23 2014-04-04 Vianney Rabhi Vanne tubulaire de commande d'un moteur a rapport volumetrique variable
CN103335686A (zh) * 2013-07-16 2013-10-02 上海交通大学 发动机气缸容积动态测量方法及装置
FR3029977B1 (fr) 2014-12-12 2018-11-30 MCE 5 Development Dispositif de transmission d'un moteur, notamment pour un moteur a taux de compression et/ou a cylindree variable.
FR3051838B1 (fr) * 2016-05-24 2018-09-07 MCE 5 Development Dispositif de guidage a roulement d'un piston de combustion pour un moteur a taux de compression variable
AT518268B1 (de) * 2016-05-31 2017-09-15 Avl List Gmbh Verfahren und System zur Diagnose und/oder Steuerung einer Hubkolbenmaschine mit einem variablen Verdichtungsverhältnis
AT518694B1 (de) 2016-05-31 2019-08-15 Avl List Gmbh Hubkolbenmaschine sowie Verfahren und Vorrichtung zur Diagnose und/oder Steuerung einer Hubkolbenmaschine
FR3066787B1 (fr) * 2017-05-29 2021-07-09 MCE 5 Development Piston pour moteur a combustion interne portant une cible, et moteur a combustion interne comprenant un tel piston
FR3066817B1 (fr) * 2017-05-29 2019-08-16 MCE 5 Development Dispositif de mesure pour moteur a combustion interne comprenant un detecteur de passage d'une cible et moteur comportant un tel dispositif de mesure
KR20190018822A (ko) * 2017-08-16 2019-02-26 현대자동차주식회사 가변 압축비 장치, 및 이의 제어방법
DE102017123726A1 (de) * 2017-10-12 2017-11-23 FEV Europe GmbH VCR-Hubkolbenmaschine
JP7309115B2 (ja) * 2019-03-25 2023-07-18 株式会社三井E&S Du エンジン
CN112177771B (zh) * 2019-07-05 2022-08-09 伊希欧1控股有限公司 具有可变压缩的内燃机的连杆
US11421588B2 (en) * 2020-04-02 2022-08-23 Soon Gil Jang Variable compression ratio engine

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Also Published As

Publication number Publication date
WO2008145837A1 (fr) 2008-12-04
FR2914950B1 (fr) 2012-06-15
AU2008257318B2 (en) 2011-12-22
CN101680364B (zh) 2012-05-16
FR2914950A1 (fr) 2008-10-17
CN101680364A (zh) 2010-03-24
US8065909B2 (en) 2011-11-29
AU2008257318A1 (en) 2008-12-04
EP2173989A1 (de) 2010-04-14
US20100107746A1 (en) 2010-05-06
CA2681631C (fr) 2014-07-29
CA2681631A1 (fr) 2008-12-04
JP5167339B2 (ja) 2013-03-21
KR101387809B1 (ko) 2014-04-21
KR20090129518A (ko) 2009-12-16
JP2010525208A (ja) 2010-07-22
ES2527947T3 (es) 2015-02-02

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