EP2796676A1 - Vorrichtung zum Deaktivieren der Verbrennungszylinder mit Steuerrad - Google Patents

Vorrichtung zum Deaktivieren der Verbrennungszylinder mit Steuerrad Download PDF

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Publication number
EP2796676A1
EP2796676A1 EP20140160742 EP14160742A EP2796676A1 EP 2796676 A1 EP2796676 A1 EP 2796676A1 EP 20140160742 EP20140160742 EP 20140160742 EP 14160742 A EP14160742 A EP 14160742A EP 2796676 A1 EP2796676 A1 EP 2796676A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
control wheel
wheel
control
combustion engine
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.)
Withdrawn
Application number
EP20140160742
Other languages
English (en)
French (fr)
Inventor
Fabien GOUZONNAT
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2796676A1 publication Critical patent/EP2796676A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02—Cutting-out
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F01L2013/001—Deactivating cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve

Definitions

  • the invention relates to the deactivation of cylinder (s) in combustion engines of motor vehicles.
  • the object of the invention is to provide a rotating deactivation system that is fast and reliable. Another object of the invention is to provide a rotating deactivation system that allows a deactivation and / or activation more spaced than each cycle of the engine.
  • a combustion engine of a motor vehicle comprising a set of combustion cylinders and a set of valves respectively associated with these cylinders
  • the engine comprising a device for modifying the behavior of the valves which comprises a shaft a control wheel provided with at least one circumferential track and an actuator comprising a pin movable between a position where the pin is introduced into the circumferential track and a position where the pin is clear of the circumferential track, the wheel of command describing a displacement in a longitudinal direction to the camshaft during a rotation of the control wheel when the pin is engaged in the circumferential track
  • the valve behavior modification device comprising a drive arrangement of the rotational control wheel according to a rotation speed linearly dependent on the speed of rotation of the shaft with cams
  • the motor being characterized in that the driving arrangement of the rotary control wheel is configured to drive the control wheel according to a rotation speed linearly dependent on the rotational speed of the camshaft which Rotation speed of the control wheel is different from the rotational speed
  • control wheel is arranged coaxially with the camshaft.
  • the motor comprises a drive shaft which drives the control wheel in rotation, the drive shaft being distinct from the camshaft.
  • the drive shaft carries a drive wheel which meshes the control wheel.
  • control wheel is driven at a rotational speed equal to half the speed of rotation of the camshaft.
  • control wheel drives at least one cam of the camshaft moving in a longitudinal direction to the camshaft.
  • control wheel causes a displacement of a cam in a position causing a deactivation of a combustion cylinder associated with the cam.
  • the motor comprises a plurality of control wheels actuating respective cams, and the control wheels are arranged in such a way that the motor is able to implement an operating phase in which at least one combustion cylinder is deactivated at each cycle of the motor and said at least one deactivated cylinder is different from each cycle considered in the consecutive cycle during this phase.
  • control wheel has two circumferential tracks, one of the tracks causing a movement of the wheel (115) in a longitudinal direction to the camshaft and the other of the tracks holding the control wheel in a fixed position in reference. at a longitudinal direction to the camshaft.
  • the actuator has two pins which are arranged vis-à-vis respectively the two tracks of the control wheel (115) so that the pins are selectively operable in engagement of a respective track by the actuator.
  • FIG. 1 represents a rotating deactivation system according to one embodiment of the invention.
  • the figure 2 is a detailed view of an assembly comprising a cam and a control wheel according to this same embodiment.
  • figure 1 a dispensing device comprising two camshafts 100 and 200 and a set of six cam blocks each forming two cams, of which three blocks 110, 120, 130 are mounted on the shaft 100 and three blocks 210, 220, 230 are mounted on the shaft 200.
  • Each block 110, 120, 130, 210, 220, 230 comprises a cam 111, 121, 131, 211, 221, 231 and a respective circular ring 112, 122, 132, 212, 222, 232 both coaxial with the shaft. considered cam.
  • Each cam and its circular ring are integral with each other, so that they are integral in rotation to one another.
  • Each block 110, 120, 130, 210, 220, 230 is further mounted free in translation on the shaft 100, 200 considered, for example by means of a longitudinal aliasing to the shaft, which ensures a blocking rotation of the block with the shaft while allowing a longitudinal translation of the block on the shaft.
  • each block of cams 110, 120, 130, 210, 220, 230 comporte here an additional cam and an additional crown, so that the cams and the rings are here mounted on their respective shaft in a group of two cams and two crowns circular, the pair formed by an additional cam and an additional circular ring are not described in more detail here for the sake of clarity, but being similar to the pair described.
  • a not shown valve rod cooperates with cam 111 or with circular ring 112.
  • the cam 111 is adjoined by a cam of a smaller amplitude eccentric, so that when the cam block 110 is moved to the right, the valve is driven in a variable movement. and come on a reduced race.
  • the duration of the lifting of the valve can be modified by the action of the cam adjacent to the cam 111.
  • variable pitch the cam 111 is adjoined by a cam whose eccentric is angularly offset from that of the cam 111, so that when the block of cams 110 is moved to the right, the valve is driven in a back-and-forth movement offset in time.
  • Each block 110, 120, 130, 210, 220, 230 is here controlled in reciprocating translation movement longitudinally to the camshaft which carries it.
  • the block 110 is moved to the right of the figure against a helical spring 113 which is then compressed between the block considered 110 and a collar 114 fixed on the shaft 100.
  • the collar 114 here consists of a circlip but it can alternatively be made of material with the shaft 100.
  • a control wheel 115 is disposed on a flank of the block 110 which is opposed to the spring 113.
  • the control wheel 115 itself undergoes reciprocal displacement in translation on the shaft 100.
  • the wheel 115 is mounted around the shaft 100 while having a freedom of rotation and translation relative to the shaft 100.
  • the wheel 115 has a toothed drive plate 116 and the rotation of the wheel 115 is ensured by a drive shaft 300 which meshes with the drive plate 116 via a toothed wheel 310 of this shaft 300.
  • the control wheel 115 further comprises a cylinder 117 which carries on its peripheral wall two grooves 118 and 119.
  • the grooves 118 and 119 are juxtaposed to one another and each of these grooves closes on itself in circulation. around the cylinder 117.
  • a first groove 118 describes a ring coaxial with the shaft 100.
  • the second groove 119 describes two successive sections, a first section forming a portion of a circle, for example a semicircle, concentric with the shaft 100. in a first plane perpendicular to the shaft 100 and the second section forming another portion of a circle, for example a semicircle, also concentric with the shaft 100 and lying in a second plane perpendicular to the shaft 100, the second plane being shifted from the first approaching the cam block 110.
  • These two semicircles of the groove 119 are joined by portions obliquely so that the groove 119 is also closed on itself.
  • An actuator 410 is disposed opposite the control cylinder 117, laterally to the latter.
  • the actuator 410 presents, vis-à-vis the two grooves 118 and 119, two respective pins 411 and 412, which are selectively controlled in displacement towards their respective grooves 118, 119 and spaced from it.
  • the pin 411 When the pin 411 is placed in the groove 118, the pin 412 is then extracted from the groove 119. In this situation, the control wheel 115 does not describe any movement back and forth during its rotation due to the configuration. in a ring perpendicular to the groove camshaft 118.
  • the control wheel 115 When the pin 412 is engaged in the groove 119, the pin 411 being this time extracted from the groove 118, the control wheel 115 then describes a longitudinal reciprocating movement between a position on the right corresponding to the presence of the pin in the first section of the groove 119 and a position on the left corresponding to the presence of the pin 412 in the second section.
  • control wheel 115 remains fixed axially or describes an axial reciprocating movement.
  • the actuator 410 is controlled for an output of the pin 411 or an output of the pin 412
  • the control wheel 115 remains fixed axially or describes an axial reciprocating movement.
  • the present control wheel 115 is rotated at a rotational speed which is two times lower than the rotational speed of each of the camshafts 100 and 200.
  • the drive shaft 300 is driven by the shaft 100 via a belt and pulleys not shown.
  • a ratio of the diameters of the gears 310 and 116 respectively of the drive shaft 300 and the control wheel 115 produces such a ratio of one half between the rotational speeds of the control wheel 115 and the shaft.
  • Cams 100 In a variant, such a gear ratio is implemented by a gear or a chain.
  • the drive shaft 300 is driven directly by the crankshaft of the engine.
  • the drive shaft 300 is driven directly by the second camshaft 200.
  • the wheel 115 has a rotational speed subject to the speed of rotation of the motor and the camshafts 100 and 200 with a speed ratio of rotation different from one with respect to the speed of rotation of the camshafts.
  • the speed of rotation of the control wheels has a value in revolutions per minute which is different from the speed of rotation in revolutions per minute of the shaft with cams.
  • the alternating activation grooves of the different control wheels are offset in angular positioning around the camshaft 100, so that the positions in the activated or deactivated situation of the three cams of the shaft 100 are such that a cam is deactivated by motor cycle, this cam being different at each cycle.
  • control wheel having two grooves corresponding to different modes of operation
  • control wheels have a single groove corresponding to a movement back and forth.
  • the cam blocks are not returned in position by a return spring, the control wheel being rendered integral in translation with the cam block, for example by adopting an extension of the cam block which passes through the control wheel. and retains the wheel while surrounding the camshaft, which extension remaining free in rotation with respect to the control wheel.
  • the rotational speed ratio between a control wheel and its associated cam is here a ratio of one to two, other rotational speed ratios can be adopted.
  • a speed of rotation of the control wheels which is four times lower than the speed of rotation of the camshafts. A given cam is then active two out of four consecutive revolutions when the corresponding back-and-forth activation pin is engaged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
EP20140160742 2013-04-26 2014-03-19 Vorrichtung zum Deaktivieren der Verbrennungszylinder mit Steuerrad Withdrawn EP2796676A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1353842A FR3005112B1 (fr) 2013-04-26 2013-04-26 Dispositif de desactivation de cylindres de combustion a roue de commande

Publications (1)

Publication Number Publication Date
EP2796676A1 true EP2796676A1 (de) 2014-10-29

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EP20140160742 Withdrawn EP2796676A1 (de) 2013-04-26 2014-03-19 Vorrichtung zum Deaktivieren der Verbrennungszylinder mit Steuerrad

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EP (1) EP2796676A1 (de)
FR (1) FR3005112B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109083707A (zh) * 2018-09-25 2018-12-25 浙江吉利罗佑发动机有限公司 用于发动机停缸的凸轮轴、发动机及汽车

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3083267B1 (fr) 2018-06-27 2021-06-11 Renault Sas Desactivation de cylindres de moteur thermique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1177428A (en) * 1915-02-20 1916-03-28 Walter A Melin Internal-combustion engine.
WO2005080761A1 (de) * 2004-02-21 2005-09-01 Schaeffler Kg Ventiltrieb mit nockenumschaltung für die gaswechselventile eines 4-takt-verbrennungsmotors
DE102005033018A1 (de) * 2005-07-15 2007-01-25 Schaeffler Kg Ventiltrieb für eine Brennkraftmaschine
DE102008064340A1 (de) * 2008-12-20 2010-06-24 Audi Ag Ventiltrieb mit radialer Nockenträgerführung auf zylindrischen Abschnitten einer Grundnockenwelle
US20110180029A1 (en) * 2010-01-25 2011-07-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve drive for activation of gas exchange valves of internal combustion engines
US20120260870A1 (en) * 2011-04-18 2012-10-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Camshaft having a sliding piece which has different cam profiles
US20120291731A1 (en) * 2011-05-16 2012-11-22 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Device for varying the charge-changing valve lift in an internal combustion engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5556832B2 (ja) * 2012-03-06 2014-07-23 株式会社デンソー バルブリフト調整装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1177428A (en) * 1915-02-20 1916-03-28 Walter A Melin Internal-combustion engine.
WO2005080761A1 (de) * 2004-02-21 2005-09-01 Schaeffler Kg Ventiltrieb mit nockenumschaltung für die gaswechselventile eines 4-takt-verbrennungsmotors
DE102005033018A1 (de) * 2005-07-15 2007-01-25 Schaeffler Kg Ventiltrieb für eine Brennkraftmaschine
DE102008064340A1 (de) * 2008-12-20 2010-06-24 Audi Ag Ventiltrieb mit radialer Nockenträgerführung auf zylindrischen Abschnitten einer Grundnockenwelle
US20110180029A1 (en) * 2010-01-25 2011-07-28 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve drive for activation of gas exchange valves of internal combustion engines
US20120260870A1 (en) * 2011-04-18 2012-10-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Camshaft having a sliding piece which has different cam profiles
US20120291731A1 (en) * 2011-05-16 2012-11-22 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Device for varying the charge-changing valve lift in an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109083707A (zh) * 2018-09-25 2018-12-25 浙江吉利罗佑发动机有限公司 用于发动机停缸的凸轮轴、发动机及汽车

Also Published As

Publication number Publication date
FR3005112A1 (fr) 2014-10-31
FR3005112B1 (fr) 2015-05-01

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