EP3818254A1 - Device for controlling a camshaft phaser - Google Patents

Device for controlling a camshaft phaser

Info

Publication number
EP3818254A1
EP3818254A1 EP19732402.3A EP19732402A EP3818254A1 EP 3818254 A1 EP3818254 A1 EP 3818254A1 EP 19732402 A EP19732402 A EP 19732402A EP 3818254 A1 EP3818254 A1 EP 3818254A1
Authority
EP
European Patent Office
Prior art keywords
valve
assembly
drawer
insert
phase shifter
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Withdrawn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
EP19732402.3A
Other languages
German (de)
French (fr)
Inventor
Lucas GIAMBRONE
Sebastien Stoltz-Douchet
Rodrigue Berhin
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.)
BorgWarner Luxembourg Automotive Systems SA
Original Assignee
Delphi Automotive Systems Luxembourg 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 Delphi Automotive Systems Luxembourg SA filed Critical Delphi Automotive Systems Luxembourg SA
Publication of EP3818254A1 publication Critical patent/EP3818254A1/en
Withdrawn legal-status Critical Current

Links

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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • 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
    • F16K11/0708—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 comprising means to avoid jamming of the slide or means to modify the flow
    • 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
    • F16K15/14—Check valves with flexible valve members
    • F16K15/1401—Check valves with flexible valve members having a plurality of independent valve members
    • 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
    • F16K15/14—Check valves with flexible valve members
    • F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
    • 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
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F16K31/0613—Sliding valves with cylindrical slides
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34463—Locking position intermediate between most retarded and most advanced positions
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the present invention relates to a control device for controlling the position of a variable camshaft phase shifter of an internal combustion engine.
  • Camshaft phase shifters are used to control the angular relationship between the crankshaft pulley and the camshaft of an internal combustion engine.
  • a camshaft phase shifter is used to offset the intake camshaft in order to widen the engine torque curve, increase the power at high variable speed and improve the quality of idle.
  • the exhaust cam can be offset by a camshaft phase shifter to allow control of the exhaust gas recirculation like an internal EGR valve (acronym for "exhaust gas recirculation" which means recirculation exhaust) which significantly reduces pollutant emissions and also saves fuel.
  • camshaft phase shifters are controlled by hydraulic systems that use lubricating oil pressurized by the oil pump.
  • the camshaft phase shifter consists of a stator part connected to the crankshaft by means of a chain or belt and a rotor part fixed to the 'camshaft.
  • One or more pairs of hydraulic chambers are arranged between the rotor and the stator constituting a rotary actuator.
  • Each pair of hydraulic chambers consists of an advance chamber and a delay chamber.
  • the first technology is to use the pressure difference between the pressurized oil from the oil pump and the engine drain pressure close to atmospheric pressure. So when the pressure in the advance chamber is greater than the pressure in the delay chamber, the rotor rotates in the advance direction and idem when the pressure in the delay chamber is greater than the pressure in the advance chamber, the rotor rotates in the delay direction.
  • the direction of rotation is controlled by a 4-port three-position solenoid valve.
  • the volume of oil used for the movement of the rotor is taken from the high pressure circuit and evacuated via a drain, which results in a consumption of hydraulic power.
  • the second technology consists in using the torque oscillations which are exerted on the camshaft and which come from the compression forces of the valve springs. These oscillations are transferred to the rotor which generates a pressure difference on each pair of advance and delay chambers.
  • Each pair of chambers is hydraulically connected by a channel comprising a valve allowing the circulation of oil in one direction. Rotation of the rotor takes place in one direction only. The direction of rotation advance or delay is selected by a
  • solenoid valve with 5 ports and 3 positions.
  • a valve is integrated into a valve solenoid assembly.
  • the rotation is in the advance direction or in the delay direction.
  • the volume of oil displaced during the movement of the rotor is transferred between the advance chamber and the delay chamber.
  • An oil supply is required via the pressurized oil circuit from the oil pump.
  • a second valve is used at the inlet of the solenoid control valve.
  • the valves used today are of the ball or spring type and must have a permeability / bulk ratio compatible with
  • the object of the invention is to solve at least one of the problems associated with known valves.
  • the present invention solves the above-mentioned problems by proposing a device for controlling a camshaft phase shifter provided for locking or releasing a rotor from a camshaft phase shifter of an internal combustion engine.
  • the control device includes a hydraulic element comprising a body, a drawer assembly having a drawer body, a seal and a valve assembly comprising a first valve, a second valve and a third valve.
  • the control device further comprises an electromagnetic actuator connected to the drawer assembly of the hydraulic element which can move along a longitudinal axis between:
  • the valve assembly comprises at least three valves integrated in a flexible monobloc piece.
  • each valve comprises at least one pallet connected to two flexible arms and in that the valve is connected to two contiguous rigid rings.
  • the valve assembly comprises a longitudinal bar and at least three valves integrated in a flexible monobloc piece.
  • the valve comprises at least one pallet connected to a flexible arm extending along the longitudinal axis and the longitudinal bar connects the valve to the adjoining valve.
  • the longitudinal bar connects two contiguous valves.
  • Figure 1 is a perspective view of an engine with a control device according to the invention
  • Figure 2 is a sectional view of an engine with the control device according to the invention
  • FIG. 3 is a sectional view of the control device according to the invention.
  • FIG. 4 is a perspective view of the control device according to the invention.
  • Figure 5 is a perspective view of a valve assembly according to a first embodiment of the invention.
  • Figure 6 is a perspective view of the valve assembly according to a second embodiment of the invention.
  • FIG. 7 is a sectional view of the control device with the oil flows according to the invention.
  • FIGS. 1 and 2 there is shown a motor 10, a control device 12 and a camshaft phase shifter 13.
  • the control device 12 is arranged in a bore produced in the lower engine of the engine 10.
  • the control device 12 comprises an electromagnetic actuator 14 and a hydraulic element 16.
  • the electromagnetic actuator 14 controls the hydraulic element 16.
  • the electromagnetic actuator 14 comprises a connector 18 a coil 20, a rod 22, a housing 24 and a fixing lug 26.
  • the connector 18 is arranged at an end opposite to the hydraulic element 16, the hydraulic element 16 comprises a body 28, a drawer assembly 30, a gasket 32, a compression spring 40 and a washer 44.
  • the drawer assembly 30 comprises a valve assembly 34, a drawer body 36, a drawer insert 38 and a stop ring 42.
  • the slide assembly 30 is mounted in the body 28 and controls a flow of fluid between the advance and delay chambers of a camshaft phase shifter (not shown) to rotate the camshaft phase shifter in the advance or delay directions.
  • FIG. 3 and 4 is shown the body 28 of the hydraulic element.
  • the body 28 extends along a longitudinal and central X axis.
  • the body 28 is of cylindrical shape.
  • the body 28 includes a bore 29.
  • the drawer assembly 30 delimits an internal chamber 45 where the recirculation pressure of the control screw 18 prevails.
  • At least one opening which will be used later in the description defines a number of openings comprising at least one opening.
  • FIG. 3 is shown the hydraulic element 16 comprising the body 28 having three ports 46,48,50 arranged radially which makes three ports.
  • Port 46 is also called advance port 46.
  • Port 48 is called delay port 48.
  • Port 50 is called power port 50.
  • the three ports 46, 48, 50 are provided with a filter 53.
  • the power port 50 is provided with at least one opening connected to the pressurized oil circuit of the engine (not shown).
  • the advance port 46 is provided with at least one opening connected to the advance chambers of the rotor of the camshaft phase shifter 13 (not shown).
  • the port delay 48 is provided with at least one opening connected to the delay chambers of the rotor of the camshaft phase shifter 13 (not shown).
  • the drawer body 36 comprising openings 54,56,58,60.
  • the openings 54, 56, 58 are arranged radially all around the drawer body 36.
  • the opening 54 is also called the feed opening 54.
  • the opening 58 is also called the feed opening 58.
  • the opening 56 is called also delay opening 56.
  • the opening 60 is also called recirculation opening 60.
  • the drawer body 36 comprises at least the advance opening 54, at least the delay opening 56, at least the opening
  • the internal chamber 45 is arranged between the drawer insert 38 and the drawer body 36.
  • the drawer assembly 30 is arranged inside a bore formed in the body 28 of the hydraulic element 16.
  • the drawer assembly 30 extends along the longitudinal X axis.
  • the oil supply openings 58 communicate with the supply port 50 regardless of the position of the drawer assembly 30 on the longitudinal X axis.
  • the recirculation openings 60 communicate with the advance port 46 or the delay port 48 depending on the position of the drawer assembly 30 on the longitudinal X axis.
  • the feed openings 54 may or may not communicate with the feed port 46 depending on the position of the drawer assembly 30 on the longitudinal X axis.
  • the delay openings 48 may or may not communicate with the delay port 48 depending on the position of the drawer assembly 30 on the longitudinal X axis.
  • FIG. 3 According to Figure 3 are shown the recirculation 60 and supply 58 openings of the drawer body.
  • the recirculation 60 and supply 58 openings are elongated in a circumferential direction
  • the recirculation 60 and supply 58 openings of the drawer body each have an oblong projected section.
  • This oblong cross-section allows a larger flow surface than a circular opening for the same width along the axis X and therefore a greater flow of fluid through the advance 46, delay 48 and supply ports. 50.
  • the recirculation openings 60 and the oil supply openings 58 are positioned opposite the vanes 62 of the valve assembly 34.
  • the valve assembly 34 is arranged in a bore of the drawer body 36 so that an exterior surface of the valve assembly 34 is in contact with the interior surface of the drawer body 36.
  • the valve assembly 34 is tubular, that is to say it has a cylindrical shape and it is open at both ends 66.
  • the oil can flow through the internal volume of the valve assembly 34, l oil flow flowing in the direction of the longitudinal and central X axis.
  • the thickness of the tube of the valve assembly 34 is very small compared to its diameter, that is to say of the order of 0.1% to 10%.
  • the valve assembly 34 comprises at least three rigid rings 68 and at least a first valve 70, a second valve 71 and a third valve 73.
  • Each valve 70, 71, 73 comprises at least one pallet 62 connected to two arms 72,74 flexible and each valve 70, 71, 73 is connected to two rigid rings 68 consecutive.
  • the valve assembly 34 comprises at least one angular indexing element 76 produced by an internal or external notch. As shown in FIGS. 2, 3 and 4, the angular indexing element 76 does not allow the rotation of the valve assembly 34 inside the body 28 of the hydraulic element 16.
  • the rigid rings 68 may include a or several openings of different shape to allow the circulation of oil inside the valve assembly34.
  • the pallet 62 is elongated in the tangential direction of the tubular valve assembly.
  • the shape of the pallet 62 defines an oblong shape complementary to the oblong section of the recirculation opening 58 and of the feed opening 60 of the drawer body.
  • the pallet 62 has a larger area than the surface of the recirculation opening 60 and the feed opening 58 of the drawer body. The overlap of the two surfaces provides an oil seal necessary for the one-way valve function. All
  • valve34 comprises several valves 70 arranged in one direction
  • valve assembly 34 may include both valves 70,71,73 arranged in a circumferential manner and valves 70,71,73 arranged linearly along the longitudinal X axis.
  • each pair of arms 72, 74 flexible extends towards the rear of the pallet 62 with sufficient spacing so that the next pallet in the circumferential direction is arranged between the pairs of arms 72, 74 flexible.
  • the arrangement of the pallets 62 in the same circumferential direction makes it possible to increase the ratio
  • the pallets 62 and the arms 72, 74 are integral with one another.
  • the valve assembly 34 can be formed for example by cutting, for example with a laser, a cylindrical metal tube, such as steel, other variants of the embodiment of the valve assembly 34 described above are possible as for example from a metal sheet then cut by stamping or by laser or by chemical attack and then roll the metal sheet and finally weld the rolled metal sheet.
  • each valve 70,71,73 is defined by the pair of arms 72, 74 with spring.
  • the arms 72, 74 are also called first arm 72 and second arm 74.
  • the spring arms 72, 74 diverge away from the pallet 62 of the valve 70.
  • the first spring arm 72 extends to left in FIG. 4 towards a first end 66 while the second spring arm 74 extends to the right towards a second open end 67 of the valve assembly 34.
  • the spring arms 72,74 are thin in width. Due to the slenderness of the arms, an opening 80 of the pallet is defined between the spring arms 72, 74 of the valve 70, 71, 73.
  • control valve assembly 34 described in FIG. 6 is tubular, that is to say that it has a cylindrical shape and is open at both ends 80.
  • the shape of the control valve assembly 34 is called origami form.
  • the valve assembly 34 comprises at least at least three valves 70.
  • Each valve 70 comprises at least one pallet 62 connected to a flexible arm 82 and a rigid element 86.
  • the valve assembly 34 further comprises a longitudinal bar 84 extending the along the longitudinal and central X axis.
  • the longitudinal bar 84 connects two contiguous valves 70,71,73.
  • Two contiguous valves 70 are connected to each other by a longitudinal bar 84 extending along the axis X.
  • the arm 82 is arranged longitudinally along the axis X.
  • the longitudinal bar 84 is arranged between the two adjacent rigid elements 86. Bar longitudinal 84 serves to index the valve assembly 34.
  • the pallet 62 is elongated in the tangential direction of the tubular valve assembly 34.
  • the shape of the pallet 62 defines a rectangular shape complementary to the oblong section of the recirculation opening 60 and the feed opening 58 of the drawer body 36.
  • the pallet 62 has a larger surface than the surface from the recirculation opening 60 and from the feed opening 58 of the drawer body.
  • the spring arm 82 moves at an angle to the longitudinal X axis while remaining in a plane perpendicular to the X axis.
  • the spring arm 82 moves while approaching the longitudinal and central X axis .
  • the electromagnetic actuator 14 is connected to the drawer assembly 30 of the hydraulic element 16 which can move along the longitudinal axis X between:
  • valve assembly 34 of the two embodiments.
  • the pressure exerted on the outside of the pallet 62 is greater than that exerted on the inside of the pallet 62, the force exerted on the surface tends to deform the flexible arms 72,74,82.
  • the arms 72, 74, 82 flex the pallet 60, the pallet 60 moves towards the central and longitudinal axis X, which frees the recirculation opening 60 and the opening
  • the method of assembling the commandel2 device includes the following steps:
  • the assembled control device 12 is then placed on the motor 10 and then a screw is screwed through the fixing paste 26 so as to come to tighten for the axial stop and in rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Device (12) for controlling a camshaft phaser (13), comprising: - a hydraulic element (16) which comprises a body (28), a tray assembly (30) having a tray member (36) and a valve assembly (34) comprising a first valve (70), a second valve (71) and a third valve (73) and; - an actuator (14) which can move along a longitudinal axis (X) between: - a first position in which the first valve (70) opens or closes a first fluid communication (F1) and, - a second position in which the second valve (71) and the tray member (36) open or close a second fluid communication (F2) and, - a third position in which the third valve (73) and the tray member (36) open or close a third fluid communication (F3) between a delay port (48) and a delay chamber.

Description

DISPOSITIF DE COMMANDE D’UN DEPHASEUR D’ARBRE A CAMES  DEVICE FOR CONTROLLING A CAMSHAFT DEPHASEUR
DOMAINE TECHNIQUE TECHNICAL AREA
La présente invention se rapporte à un dispositif de commande pour contrôler la position d’un déphaseur d’arbre à cames variable d’un moteur à combustion interne.  The present invention relates to a control device for controlling the position of a variable camshaft phase shifter of an internal combustion engine.
ARRIERE-PLAN TECHNOLOGIQUE DE L’INVENTION TECHNOLOGICAL BACKGROUND OF THE INVENTION
Les déphaseurs d’arbre à cames sont utilisés pour contrôler la relation angulaire entre la poulie de vilebrequin et l’arbre à cames d'un moteur à combustion interne. Sur un moteur à double arbre à cames en tête, un déphaseur d’arbre à came est utilisé pour décaler l’arbre à cames d’admission afin d’élargir la courbe de couple moteur, d’augmenter la puissance à haut régime variable et d’améliorer la qualité de ralenti. En outre, la came d'échappement peut être décalée par un déphaseur d’arbre à cames afin de permettre un contrôle de la recirculation des gaz d’échappement comme une vanne EGR interne (acronyme anglais de « exhaust gas recirculation » qui veut dire recirculation des gaz d’échappement) ce qui réduit considérablement les émissions de polluants et permet aussi d’économiser du carburant.  Camshaft phase shifters are used to control the angular relationship between the crankshaft pulley and the camshaft of an internal combustion engine. On a double overhead camshaft engine, a camshaft phase shifter is used to offset the intake camshaft in order to widen the engine torque curve, increase the power at high variable speed and improve the quality of idle. In addition, the exhaust cam can be offset by a camshaft phase shifter to allow control of the exhaust gas recirculation like an internal EGR valve (acronym for "exhaust gas recirculation" which means recirculation exhaust) which significantly reduces pollutant emissions and also saves fuel.
En faisant tourner les arbres à cames vers des positions avance ou retard le calage angulaire de la levée des soupapes est modifié. Les déphaseurs d’arbre à cames sont commandés par des systèmes hydrauliques qui utilisent l’huile de lubrification mise sous pression par la pompe à huile.  By turning the camshafts to advance or delay positions the angular setting of the valve lift is changed. The camshaft phase shifters are controlled by hydraulic systems that use lubricating oil pressurized by the oil pump.
Afin de permettre la rotation de l’arbre à cames, le déphaseur d’arbre à cames est constitué d’une partie stator reliée au vilebrequin par le biais d’une chaîne ou d’une courroie et d’une partie rotor fixée à l’arbre à cames.  In order to allow the camshaft to rotate, the camshaft phase shifter consists of a stator part connected to the crankshaft by means of a chain or belt and a rotor part fixed to the 'camshaft.
Une ou plusieurs paires de chambres hydrauliques sont disposées entre le rotor et le stator constituant un vérin rotatif. Chaque paire de chambres hydrauliques est constituée d’une chambre d’avance et d’une chambre retard.  One or more pairs of hydraulic chambers are arranged between the rotor and the stator constituting a rotary actuator. Each pair of hydraulic chambers consists of an advance chamber and a delay chamber.
Deux technologies distinctes permettent le mouvement de rotation du rotor par rapport au stator.  Two distinct technologies allow the rotational movement of the rotor relative to the stator.
La première technologie consiste à utiliser la différence de pression entre l’huile sous pression qui provient de la pompe à huile et la pression de drainage du moteur proche de la pression atmosphérique. Ainsi quand la pression dans la chambre d’avance est supérieure à la pression dans la chambre retard, le rotor tourne dans le sens avance et idem lorsque la pression dans la chambre retard est supérieure à la pression dans la chambre d’avance, le rotor tourne dans le sens retard. Le sens de rotation est contrôlé par un électrovanne à 4 ports et trois positions. Le volume d’huile servant au mouvement du rotor est prélevé au circuit haute pression et évacué via un drain ce qui entraîne une consommation de puissance hydraulique. The first technology is to use the pressure difference between the pressurized oil from the oil pump and the engine drain pressure close to atmospheric pressure. So when the pressure in the advance chamber is greater than the pressure in the delay chamber, the rotor rotates in the advance direction and idem when the pressure in the delay chamber is greater than the pressure in the advance chamber, the rotor rotates in the delay direction. The direction of rotation is controlled by a 4-port three-position solenoid valve. The volume of oil used for the movement of the rotor is taken from the high pressure circuit and evacuated via a drain, which results in a consumption of hydraulic power.
La seconde technologie consiste à utiliser les oscillations de couple qui s’exerce sur l’arbre à cames et qui proviennent des efforts de compression des ressorts de soupape. Ces oscillations sont transférées au rotor ce qui engendre une différence de pression sur chaque paire de chambres d’avance et retard. Chaque paire de chambres est reliée hydrauliquement par un canal comprenant un clapet autorisant la circulation d’huile dans un sens. La rotation du rotor se fait dans un seul sens. Le sens de rotation avance ou retard est sélectionné par une  The second technology consists in using the torque oscillations which are exerted on the camshaft and which come from the compression forces of the valve springs. These oscillations are transferred to the rotor which generates a pressure difference on each pair of advance and delay chambers. Each pair of chambers is hydraulically connected by a channel comprising a valve allowing the circulation of oil in one direction. Rotation of the rotor takes place in one direction only. The direction of rotation advance or delay is selected by a
électrovanne à 5 ports et 3 positions. Un clapet est intégré à un ensemble tiroir de l’électrovanne. Suivant la position de l’ensemble tiroir, la rotation se fait dans le sens avance ou dans le sens retard. Le volume d’huile déplacé lors du mouvement du rotor est transféré entre la chambre d’avance et la chambre de retard. Il y a recirculation d’huile à l’intérieur du déphaseur et donc il n’y a pas de puissance hydraulique consommée. Une alimentation en huile est nécessaire via le circuit d’huile sous pression provenant de la pompe à huile. Afin de ne pas évacuer la pression interne du déphaseur d’arbre à came vers le circuit d’huile du moteur et ne pas perturber celui-ci, un second clapet est utilisé à l’entrée de l’électro vanne de commande. Les clapets utilisés aujourd’hui sont de type à bille ou à ressort et doivent avoir un ratio perméabilité/encombrement compatible avec les solenoid valve with 5 ports and 3 positions. A valve is integrated into a valve solenoid assembly. Depending on the position of the drawer assembly, the rotation is in the advance direction or in the delay direction. The volume of oil displaced during the movement of the rotor is transferred between the advance chamber and the delay chamber. There is oil recirculation inside the phase shifter and therefore there is no hydraulic power consumed. An oil supply is required via the pressurized oil circuit from the oil pump. In order not to relieve the internal pressure of the camshaft phase shifter towards the engine oil circuit and not to disturb it, a second valve is used at the inlet of the solenoid control valve. The valves used today are of the ball or spring type and must have a permeability / bulk ratio compatible with
performances attendues du déphaseur d’arbre à cames ce qui est difficile à obtenir. expected performance of the camshaft phase shifter which is difficult to obtain.
Des constructeurs demandent des solutions de plus en compactes pour les déphaseurs d’arbre à came. Des solutions comme le dispositif de commande appelé aussi alimentation centrale en huile dans le déphaseur (appelé en anglais « barrel check valve ») ne peuvent pas être utilisés car l’encombrement disponible pour le déphaseur d’arbre à came est insuffisant dans le moteur. Pour cela il faut rechercher un compromis entre un encombrement du déphaseur d’arbre à cames réduit et sa vitesse de rotation. Dans ce contexte, l’objet de l'invention est de résoudre au moins l'un des problèmes associés aux clapets connus. Manufacturers are asking for more and more compact solutions for camshaft phase shifters. Solutions such as the control device also called central oil supply in the phase shifter (called in English "barrel check valve") cannot be used because the space available for the camshaft phase shifter is insufficient in the motor. For this it is necessary to seek a compromise between a space requirement of the reduced camshaft phase shifter and its speed of rotation. In this context, the object of the invention is to solve at least one of the problems associated with known valves.
RESUME DE L’INVENTION SUMMARY OF THE INVENTION
La présente invention résout les problèmes ci-dessus mentionnés en proposant un dispositif de commande d’un déphaseur d’arbre à cames prévu pour verrouiller ou libérer un rotor d’un déphaseur d’arbre à cames d’un moteur à combustion interne. De plus le dispositif de commande comprend un élément hydraulique comprenant un corps, un ensemble tiroir ayant un corps de tiroir, un joint et un ensemble clapet comprenant un premier clapet, un deuxième clapet et un troisième clapet. Le dispositif de commande comprend de plus un actionneur électromagnétique relié à l’ensemble tiroir de l’élément hydraulique pouvant se déplacer selon un axe longitudinal entre :  The present invention solves the above-mentioned problems by proposing a device for controlling a camshaft phase shifter provided for locking or releasing a rotor from a camshaft phase shifter of an internal combustion engine. In addition, the control device includes a hydraulic element comprising a body, a drawer assembly having a drawer body, a seal and a valve assembly comprising a first valve, a second valve and a third valve. The control device further comprises an electromagnetic actuator connected to the drawer assembly of the hydraulic element which can move along a longitudinal axis between:
-une première position dans laquelle le premier clapet ouvre ou ferme une première communication de fluide entre un port d’avance du corps de tiroir et une chambre d’avance du déphaseur d’arbre à cames et,  a first position in which the first valve opens or closes a first fluid communication between an advance port of the slide body and an advance chamber of the camshaft phase shifter and,
-une deuxième position dans laquelle le deuxième clapet et le corps de tiroir ouvrent ou ferment une deuxième communication de fluide entre un circuit d’huile provenant du moteur et un port d’alimentation du corps de tiroir et,  a second position in which the second valve and the drawer body open or close a second fluid communication between an oil circuit coming from the engine and a supply port for the drawer body and,
-une troisième position dans lequel le troisième clapet et le corps de tiroir ouvrent ou ferment une troisième communication de fluide entre un port de retard du corps de tiroir et une chambre de retard du déphaseur d’arbre à cames. De plus Dans un premier mode de réalisation de l’invention, l’ensemble clapet comprend au moins trois clapets intégrés dans une pièce monobloc flexible. De plus chaque clapet comprend au moins une palette reliée à deux bras flexibles et en ce que le clapet est relié à deux anneaux rigides contigus. Dans un deuxième mode de réalisation de l’invention l’ensemble clapet comprend une barre longitudinale et au moins trois clapets intégrés dans une pièce monobloc flexible. De plus le clapet comprend au moins une palette reliée à un bras flexible s’étendant le long de l’axe longitudinal et la barre longitudinale relie le clapet au clapet contigu. De plus la barre longitudinale relie deux clapets contigus. Une méthode de réalisation du dispositif de commande des deux modes de réalisation de l’invention décrit ci- dessus comprend les étapes suivantes : - insérer l’ensemble clapet dans le corps de tiroir, a third position in which the third valve and the slide body open or close a third fluid communication between a delay port of the slide body and a delay chamber of the camshaft phase shifter. In addition, in a first embodiment of the invention, the valve assembly comprises at least three valves integrated in a flexible monobloc piece. In addition, each valve comprises at least one pallet connected to two flexible arms and in that the valve is connected to two contiguous rigid rings. In a second embodiment of the invention, the valve assembly comprises a longitudinal bar and at least three valves integrated in a flexible monobloc piece. In addition, the valve comprises at least one pallet connected to a flexible arm extending along the longitudinal axis and the longitudinal bar connects the valve to the adjoining valve. In addition, the longitudinal bar connects two contiguous valves. A method of producing the control device for the two embodiments of the invention described above comprises the following steps: - insert the valve assembly into the drawer body,
- insérer l’insert de tiroir dans l’ensemble réalisé à l’étape précédente, - insert the drawer insert into the assembly made in the previous step,
- insérer l’anneau d’arrêt ondulé dans l’ensemble de l’étape précédente,- insert the wavy stop ring in the whole of the previous step,
- insérer le ressort de compression dans le corps, - insert the compression spring in the body,
- insérer l’ensemble tiroir dans le corps,  - insert the drawer assembly into the body,
- sertir l’élément hydraulique avec l’actionneur électromagnétique.  - crimp the hydraulic element with the electromagnetic actuator.
BREVE DESCRIPTION DES DESSINS BRIEF DESCRIPTION OF THE DRAWINGS
Un ou plusieurs modes de réalisation de l'invention vont maintenant être décrits, à titre d’exemple uniquement, en référence aux dessins annexés, sur lesquels :  One or more embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
La figure 1 est une vue en perspective d’un moteur avec un dispositif de commande selon l’invention ;  Figure 1 is a perspective view of an engine with a control device according to the invention;
La figure 2 est une vue en coupe d’un moteur avec le dispositif de commande selon l’invention  Figure 2 is a sectional view of an engine with the control device according to the invention
La figure 3 est une vue en coupe du dispositif de commande selon l’invention ;  Figure 3 is a sectional view of the control device according to the invention;
La figure 4 est une vue en perspective du dispositif de commande selon l’invention ;  Figure 4 is a perspective view of the control device according to the invention;
La figure 5 est une vue en perspective d’un ensemble clapet selon un premier mode de réalisation de l’invention ;  Figure 5 is a perspective view of a valve assembly according to a first embodiment of the invention;
La figure 6 est une vue en perspective de l’ensemble clapet selon un deuxième mode de réalisation de l’invention ;  Figure 6 is a perspective view of the valve assembly according to a second embodiment of the invention;
La figure 7 est une vue en coupe du dispositif de commande avec les flux d’huile selon l’invention ;  Figure 7 is a sectional view of the control device with the oil flows according to the invention;
DESCRIPTION DES MODES DE REALISATION PREFERES DESCRIPTION OF THE PREFERRED EMBODIMENTS
Pour faciliter et clarifier la description qui suit, l'orientation de haut en bas est choisi arbitrairement et, les mots et expressions tels que "ci-dessus, dessous, dessus, dessous, haut, bas ..." peuvent être utilisés sans aucune intention de limiter l'invention. Selon les figure 1 et 2, est représenté un moteur 10, un dispositif de commande 12 et un déphaseur d’arbre à cames 13. Le dispositif de commande 12 est agencé dans un alésage réalisé dans le bas moteur du moteur 10. To facilitate and clarify the following description, the orientation from top to bottom is chosen arbitrarily and, words and expressions such as "above, below, above, below, top, bottom ..." can be used without any intention to limit the invention. According to FIGS. 1 and 2, there is shown a motor 10, a control device 12 and a camshaft phase shifter 13. The control device 12 is arranged in a bore produced in the lower engine of the engine 10.
Selon les figure 3 et 4 est représenté le dispositif de commande 12. Le dispositif de commande 12 comprend un actionneur électromagnétique 14 et un élément hydraulique 16. L’ actionneur électromagnétique 14 pilote l’élément hydraulique 16. L’ actionneur électromagnétique 14 comprend un connecteur 18 une bobine 20, une tige 22, un boîtier 24 et une patte de fixation 26. Le connecteur 18 est agencé à une extrémité opposée à l’élément hydraulique 16, L’élément hydraulique 16 comprend un corps 28, un ensemble tiroir 30, un joint 32, un ressort de compression 40 et une rondelle 44. L’ensemble tiroir 30 comprend un ensemble clapet 34, un corps de tiroir 36, un insert de tiroir 38 et un anneau d’arrêt 42.  According to FIGS. 3 and 4, the control device 12 is shown. The control device 12 comprises an electromagnetic actuator 14 and a hydraulic element 16. The electromagnetic actuator 14 controls the hydraulic element 16. The electromagnetic actuator 14 comprises a connector 18 a coil 20, a rod 22, a housing 24 and a fixing lug 26. The connector 18 is arranged at an end opposite to the hydraulic element 16, the hydraulic element 16 comprises a body 28, a drawer assembly 30, a gasket 32, a compression spring 40 and a washer 44. The drawer assembly 30 comprises a valve assembly 34, a drawer body 36, a drawer insert 38 and a stop ring 42.
Selon les figures 3 et 4, l’ensemble tiroir 30 est monté dans le corps 28 et commande un écoulement de fluide entre les chambres d'avance et de retard d’un déphaseur d’arbre à cames (non représenté) pour faire tourner le déphaseur d’arbre à cames dans les directions avance ou retard.  According to Figures 3 and 4, the slide assembly 30 is mounted in the body 28 and controls a flow of fluid between the advance and delay chambers of a camshaft phase shifter (not shown) to rotate the camshaft phase shifter in the advance or delay directions.
Dans les figure 3 et 4 est représenté le corps 28 de l’élément hydraulique. Le corps 28 s’étend le long d’un axe X longitudinal et central. Le corps 28 est de forme cylindrique. Le corps 28 comprend un alésage 29. L’ensemble tiroir 30 délimite une chambre interne 45 où règne la pression de recirculation de la vis de commande 18.  In Figures 3 and 4 is shown the body 28 of the hydraulic element. The body 28 extends along a longitudinal and central X axis. The body 28 is of cylindrical shape. The body 28 includes a bore 29. The drawer assembly 30 delimits an internal chamber 45 where the recirculation pressure of the control screw 18 prevails.
Le terme « « au moins une ouverture » qui sera utilisé ensuite dans la description définit un nombre d’ouvertures comprenant au moins une ouverture.  The term "at least one opening" which will be used later in the description defines a number of openings comprising at least one opening.
Dans la figure 3 est représenté l’élément hydraulique 16 comprenant le corps 28 ayant trois ports 46,48,50 disposés radialement ce qui fait trois ports. Le port 46 est appelé aussi port d’avance 46. Le port 48 est appelé port de retard 48. Le port 50 est appelé port d’alimentation 50. Les trois ports 46, 48, 50 sont pourvus d’un filtre 53.  In Figure 3 is shown the hydraulic element 16 comprising the body 28 having three ports 46,48,50 arranged radially which makes three ports. Port 46 is also called advance port 46. Port 48 is called delay port 48. Port 50 is called power port 50. The three ports 46, 48, 50 are provided with a filter 53.
Dans la figure 3, le port d’alimentation 50 est pourvu d’au moins une ouverture reliée au circuit d’huile sous pression du moteur (non représenté). Le port d’avance 46 est pourvu au minimum d’une ouverture reliée aux chambres d’avance du rotor du déphaseur d’arbre à cames 13 (non représenté). Le port retard 48 est pourvu d’au moins une ouverture reliée aux chambres de retard du rotor du déphaseur d’arbre à cames 13 (non représenté). In Figure 3, the power port 50 is provided with at least one opening connected to the pressurized oil circuit of the engine (not shown). The advance port 46 is provided with at least one opening connected to the advance chambers of the rotor of the camshaft phase shifter 13 (not shown). The port delay 48 is provided with at least one opening connected to the delay chambers of the rotor of the camshaft phase shifter 13 (not shown).
Dans la figure 3 est représenté le corps de tiroir 36 comprenant des ouvertures 54,56,58,60. Les ouvertures 54,56,58 sont agencées radialement tout autour du corps de tiroir 36. L’ouverture 54 est appelée aussi ouverture d’avance 54. L’ouverture 58 est appelée aussi ouverture d’alimentation 58. L’ouverture 56 est appelée aussi ouverture de retard 56. L’ouverture 60 est appelée aussi ouverture de recirculation 60. Le corps de tiroir 36 comprend au moins l’ouverture d’avance 54, au moins l’ouverture de retard 56, au moins l’ouverture  In Figure 3 is shown the drawer body 36 comprising openings 54,56,58,60. The openings 54, 56, 58 are arranged radially all around the drawer body 36. The opening 54 is also called the feed opening 54. The opening 58 is also called the feed opening 58. The opening 56 is called also delay opening 56. The opening 60 is also called recirculation opening 60. The drawer body 36 comprises at least the advance opening 54, at least the delay opening 56, at least the opening
d’alimentation 58, et au moins l’ouverture de recirculation 60. Les ouvertures 54,56,58 sont soumises à la pression de recirculation via la chambre interne 45. La chambre interne 45 est agencé entre l’insert de tiroir 38 et le corps de tiroir 36. supply 58, and at least the recirculation opening 60. The openings 54, 56, 58 are subjected to the recirculation pressure via the internal chamber 45. The internal chamber 45 is arranged between the drawer insert 38 and the drawer body 36.
Selon la figure 3, l’ensemble tiroir 30 est agencé à l’intérieur d’un alésage réalisé dans le corps 28 de l’élément hydraulique 16. L’ensemble tiroir 30 s’étend le long de l’axe X longitudinal. Les ouvertures d’alimentation 58 d’huile communiquent avec le port d’alimentation 50 quel que soit la position de l’ensemble tiroir 30 sur l’axe X longitudinal. Les ouvertures de recirculation 60 communiquent avec le port d’avance 46 ou le port de retard 48 en fonction de la position de l’ensemble tiroir 30 sur l’axe X longitudinal. Les ouvertures d’avance 54 communiquent ou non avec le port d’avance 46 en fonction de la position de l’ensemble tiroir 30 sur l’axe X longitudinal. Les ouvertures de retard 48 communiquent ou non avec le port de retard 48 en fonction de la position de l’ensemble tiroir 30 sur l’axe X longitudinal.  According to Figure 3, the drawer assembly 30 is arranged inside a bore formed in the body 28 of the hydraulic element 16. The drawer assembly 30 extends along the longitudinal X axis. The oil supply openings 58 communicate with the supply port 50 regardless of the position of the drawer assembly 30 on the longitudinal X axis. The recirculation openings 60 communicate with the advance port 46 or the delay port 48 depending on the position of the drawer assembly 30 on the longitudinal X axis. The feed openings 54 may or may not communicate with the feed port 46 depending on the position of the drawer assembly 30 on the longitudinal X axis. The delay openings 48 may or may not communicate with the delay port 48 depending on the position of the drawer assembly 30 on the longitudinal X axis.
Selon la figure 3 sont représentées les ouvertures de recirculation 60 et d’alimentation 58 du corps de tiroir. Les ouvertures de recirculation 60 et d’alimentation 58 sont allongées dans une direction circonférentielle  According to Figure 3 are shown the recirculation 60 and supply 58 openings of the drawer body. The recirculation 60 and supply 58 openings are elongated in a circumferential direction
perpendiculaire à l’axe X longitudinal. De cette manière les ouvertures de recirculation 60 et d’alimentation 58 du corps de tiroir ont chacune une section projetée oblongue. Cette section transversale oblongue permet une plus grande surface d’écoulement qu’une ouverture circulaire pour une même largeur suivant l’axe X et donc un plus grand débit de fluide à travers les ports d’avance 46, de retard 48 et d’alimentation 50. Selon la figure 3, les ouvertures de recirculation 60 et les ouvertures d’alimentation 58 d’huile sont positionnées face aux palettes 62 de l’ensemble clapet34. L’ensemble clapet 34 est agencé dans un alésage du corps de tiroir 36 de sorte qu’une surface extérieure de l’ensemble clapet34 est au contact de la surface intérieure du corps de tiroir 36. perpendicular to the longitudinal X axis. In this way the recirculation 60 and supply 58 openings of the drawer body each have an oblong projected section. This oblong cross-section allows a larger flow surface than a circular opening for the same width along the axis X and therefore a greater flow of fluid through the advance 46, delay 48 and supply ports. 50. According to FIG. 3, the recirculation openings 60 and the oil supply openings 58 are positioned opposite the vanes 62 of the valve assembly 34. The valve assembly 34 is arranged in a bore of the drawer body 36 so that an exterior surface of the valve assembly 34 is in contact with the interior surface of the drawer body 36.
Selon la figure 5 est décrit un premier mode de réalisation. L’ensemble clapet 34 est tubulaire c’est-à-dire qu’il a une forme cylindrique et il est ouvert aux deux extrémités 66. L’huile peut s’écouler à travers le volume interne de l’ensemble clapet 34, l’écoulement de l’huile s’écoulant dans la direction de l’axe X longitudinal et central. L’épaisseur du tube de l’ensemble clapet 34 est très petite en regard de son diamètre, c’est-à-dire de l’ordre de 0,1% à 10%.  According to Figure 5 is described a first embodiment. The valve assembly 34 is tubular, that is to say it has a cylindrical shape and it is open at both ends 66. The oil can flow through the internal volume of the valve assembly 34, l oil flow flowing in the direction of the longitudinal and central X axis. The thickness of the tube of the valve assembly 34 is very small compared to its diameter, that is to say of the order of 0.1% to 10%.
L’ensemble clapet 34 comprend au moins trois anneaux rigides 68 et au moins un premier clapet 70, un deuxième clapet 71 et un troisième clapet 73. Chaque clapet 70, 71, 73 comprend au moins une palette 62 relié à deux bras 72,74 flexibles et chaque clapet 70, 71, 73 est relié à deux anneaux rigides 68 consécutifs. The valve assembly 34 comprises at least three rigid rings 68 and at least a first valve 70, a second valve 71 and a third valve 73. Each valve 70, 71, 73 comprises at least one pallet 62 connected to two arms 72,74 flexible and each valve 70, 71, 73 is connected to two rigid rings 68 consecutive.
L’ensemble clapet 34 comprend au moins un élément d’indexation 76 angulaire réalisé par une encoche interne ou externe. Comme représenté dans les figures 2,3 et 4, l’élément d’indexation 76 angulaire ne permet pas la rotation de l’ensemble clapet34 à l’intérieur du corps 28 de l’élément hydraulique 16. Les anneaux rigides 68 peuvent comporter une ou plusieurs ouvertures de forme différente pour permettre la circulation d’huile à l’intérieur de l’ensemble clapet34. La palette 62 est allongée dans la direction tangentielle de l’ensemble clapet34 tubulaire. La forme de la palette 62 définit une forme oblongue complémentaire de la section oblongue de l’ouverture de recirculation 58 et de l’ouverture d’alimentation 60 du corps de tiroir. De plus la palete 62 a une surface plus grande que la surface de l’ouverture de recirculation 60 et de l’ouverture d’alimentation 58 du corps de tiroir. Le recouvrement des deux surfaces permet d’avoir une étanchéité à l’huile nécessaire à la fonction de soupape unidirectionnelle. L’ensemble The valve assembly 34 comprises at least one angular indexing element 76 produced by an internal or external notch. As shown in FIGS. 2, 3 and 4, the angular indexing element 76 does not allow the rotation of the valve assembly 34 inside the body 28 of the hydraulic element 16. The rigid rings 68 may include a or several openings of different shape to allow the circulation of oil inside the valve assembly34. The pallet 62 is elongated in the tangential direction of the tubular valve assembly. The shape of the pallet 62 defines an oblong shape complementary to the oblong section of the recirculation opening 58 and of the feed opening 60 of the drawer body. In addition the pallet 62 has a larger area than the surface of the recirculation opening 60 and the feed opening 58 of the drawer body. The overlap of the two surfaces provides an oil seal necessary for the one-way valve function. All
clapet34 comprend plusieurs clapets 70 disposés dans une direction valve34 comprises several valves 70 arranged in one direction
circonférentielle perpendiculaire à l’axe X longitudinal. Dans d’autres alternatives l’ensemble clapet 34 peut comprendre à la fois des clapets 70,71,73 agencés de manière circonférentielle et des clapets 70,71,73 agencés linéairement le long de l’axe X longitudinal. Dans la direction circonférentielle, chaque paire de bras 72, 74 flexibles s’étend vers l’arrière de la palette 62 avec un écartement suffisant pour que la palette suivante dans la direction circonférentielle soit agencée entre les paires de bras 72, 74 flexibles. L’agencement des palettes 62 dans une même direction circonférentielle permet d’augmenter le ratio circumferential perpendicular to the longitudinal X axis. In other alternatives, the valve assembly 34 may include both valves 70,71,73 arranged in a circumferential manner and valves 70,71,73 arranged linearly along the longitudinal X axis. In the circumferential direction, each pair of arms 72, 74 flexible extends towards the rear of the pallet 62 with sufficient spacing so that the next pallet in the circumferential direction is arranged between the pairs of arms 72, 74 flexible. The arrangement of the pallets 62 in the same circumferential direction makes it possible to increase the ratio
perméabilité/encombrement de l’ensemble clapet34. permeability / bulk of the valve assembly34.
Dans le mode de réalisation décrit précédemment, les palettes 62 et les bras 72, 74 sont solidaires l'un de l'autre. L’ensemble clapet 34 peut être formé par exemple en découpant, par exemple au laser, un tube de métal cylindrique, comme par exemple l’acier, D’autres variantes au mode de réalisation de l’ensemble clapet34 décrits précédemment sont possibles comme par exemple partir d’une feuille de métal puis découper par emboutissage ou par laser ou par attaque chimique et ensuite rouler la feuille de métal et enfin souder la feuille de métal roulée.  In the embodiment described above, the pallets 62 and the arms 72, 74 are integral with one another. The valve assembly 34 can be formed for example by cutting, for example with a laser, a cylindrical metal tube, such as steel, other variants of the embodiment of the valve assembly 34 described above are possible as for example from a metal sheet then cut by stamping or by laser or by chemical attack and then roll the metal sheet and finally weld the rolled metal sheet.
Selon la figure 5, chaque clapet 70,71,73 est défini par la paire de bras 72, 74 à ressort. Les bras 72, 74 sont appelés aussi premier bras 72 et deuxième bras 74. Selon la figure 4 les bras 72, 74 de ressort divergent en s'éloignant de la palette 62 du clapet 70. Le premier bras 72 de ressort s'étend à gauche sur la figure 4 vers une première extrémité 66 tandis que le deuxième bras 74 de ressort s'étend à droite vers une deuxième extrémité 67 ouverte de l’ensemble clapet 34.  According to Figure 5, each valve 70,71,73 is defined by the pair of arms 72, 74 with spring. The arms 72, 74 are also called first arm 72 and second arm 74. According to FIG. 4, the spring arms 72, 74 diverge away from the pallet 62 of the valve 70. The first spring arm 72 extends to left in FIG. 4 towards a first end 66 while the second spring arm 74 extends to the right towards a second open end 67 of the valve assembly 34.
Les bras de ressort 72,74 sont minces en largeur. En raison de l’élancement des bras, une ouverture 80 de la palette est définie entre les bras 72, 74 à ressort du clapet 70, 71, 73.  The spring arms 72,74 are thin in width. Due to the slenderness of the arms, an opening 80 of the pallet is defined between the spring arms 72, 74 of the valve 70, 71, 73.
Dans un deuxième mode de réalisation l’ensemble clapet de commande 34 décrit sur la figure 6 est tubulaire c’est-à-dire qu’il a une forme cylindrique et ouverte aux deux extrémités 80. La forme de l’ensemble clapet de commande 34 est appelée forme en origami. L’ensemble clapet34 comprend au moins au moins trois clapets 70. Chaque clapet 70 comprend au moins une palette 62 reliée à un bras 82 flexible et un élément rigide 86. L’ensemble clapet 34 comprend de plus une barre longitudinale 84 s’étendant le long del’axe X longitudinal et central. La barre longitudinale 84 relie deux clapets 70,71,73 contigus. Deux clapets 70 contigus sont reliés entre eux par une barre longitudinale 84 s’étendant le long de l’axe X. Le bras 82 est agencé longitudinalement selon l’axe X. La barre longitudinale 84 est agencé entre les deux éléments rigides 86 contigus. La barre longitudinale 84 sert d’indexation à l’ensemble clapet 34. La palette 62 est allongée dans la direction tangentielle de l’ensemble clapet 34 tubulaire. La forme de la palette 62 définit une forme rectangulaire complémentaire de la section oblongue de l’ouverture de recirculation 60 et de l’ouverture d’alimentation 58 du corps de tiroir 36. De plus la palette 62 a une surface plus grande que la surface de l’ouverture de recirculation 60 et de l’ouverture d’alimentation 58 du corps de tiroir. In a second embodiment, the control valve assembly 34 described in FIG. 6 is tubular, that is to say that it has a cylindrical shape and is open at both ends 80. The shape of the control valve assembly 34 is called origami form. The valve assembly 34 comprises at least at least three valves 70. Each valve 70 comprises at least one pallet 62 connected to a flexible arm 82 and a rigid element 86. The valve assembly 34 further comprises a longitudinal bar 84 extending the along the longitudinal and central X axis. The longitudinal bar 84 connects two contiguous valves 70,71,73. Two contiguous valves 70 are connected to each other by a longitudinal bar 84 extending along the axis X. The arm 82 is arranged longitudinally along the axis X. The longitudinal bar 84 is arranged between the two adjacent rigid elements 86. Bar longitudinal 84 serves to index the valve assembly 34. The pallet 62 is elongated in the tangential direction of the tubular valve assembly 34. The shape of the pallet 62 defines a rectangular shape complementary to the oblong section of the recirculation opening 60 and the feed opening 58 of the drawer body 36. In addition, the pallet 62 has a larger surface than the surface from the recirculation opening 60 and from the feed opening 58 of the drawer body.
Selon la figure 6 le bras 82 de ressort se déplace en faisant un angle avec l’axe X longitudinale en restant dans un plan perpendiculaire à l’axe X. Le bras 82 de ressort se déplace en rapprochant de l’axe X longitudinal et central.  According to FIG. 6, the spring arm 82 moves at an angle to the longitudinal X axis while remaining in a plane perpendicular to the X axis. The spring arm 82 moves while approaching the longitudinal and central X axis .
Nous allons décrire brièvement le fonctionnement du dispositif de commande 12 du déphaseur d’arbre à cames 13 prévu pour verrouiller ou libérer un rotor d’un déphaseur d’arbre à cames 13. L’actionneur électromagnétique 14 est relié à l’ensemble tiroir 30 de l’élément hydraulique 16 pouvant se déplacer selon l’axe longitudinal X entre :  We will briefly describe the operation of the control device 12 of the camshaft phase shifter 13 provided for locking or releasing a rotor of a camshaft phase shifter 13. The electromagnetic actuator 14 is connected to the drawer assembly 30 of the hydraulic element 16 which can move along the longitudinal axis X between:
-une première position dans laquelle le premier clapet 70 ouvre ou ferme une première communication de fluide Fl entre une chambre d’avance du déphaseur d’arbre à cames 13 et un port d’avance 46 du corps de tiroir 36,  a first position in which the first valve 70 opens or closes a first fluid communication F1 between an advance chamber of the camshaft phase shifter 13 and an advance port 46 of the slide body 36,
-une deuxième position dans laquelle le deuxième clapet 71 et le corps de tiroir (36) ouvrent ou ferment une deuxième communication de fluide (F2) entre un circuit d’huile provenant du moteur (10) et un port d’alimentation (50) du corps de tiroir (36) et,  a second position in which the second valve 71 and the slide body (36) open or close a second fluid communication (F2) between an oil circuit coming from the engine (10) and a supply port (50) of the drawer body (36) and,
-une troisième position dans lequel le troisième clapet 73 ouvre ou ferme une troisième communication de fluide F3 entre une chambre de retard du déphaseur d’arbre à cames 13 et un port de retard 48 du corps de tiroir 36.  a third position in which the third valve 73 opens or closes a third fluid communication F3 between a delay chamber of the camshaft phase shifter 13 and a delay port 48 of the slide body 36.
Nous allons décrire brièvement le fonctionnement de l’ensemble clapet 34 des deux modes de réalisation. Lorsque la pression qui s’exerce à l’extérieur de la palette 62 est supérieure à celle exercée sur l’intérieur de la palette 62, la force exercée sur la surface tend à déformer les bras 72,74,82 flexibles. Les bras 72,74,82 fléchissent la palette 60, la palette 60 se déplace vers l’axe X central et longitudinal ce qui libère l’ouverture de recirculation 60 et l’ouverture  We will briefly describe the operation of the valve assembly 34 of the two embodiments. When the pressure exerted on the outside of the pallet 62 is greater than that exerted on the inside of the pallet 62, the force exerted on the surface tends to deform the flexible arms 72,74,82. The arms 72, 74, 82 flex the pallet 60, the pallet 60 moves towards the central and longitudinal axis X, which frees the recirculation opening 60 and the opening
d’alimentation 58 du corps de tiroir 36. La déformation maximale des bras 72,74,82 est limitée par des arrêts radiaux dans l’insert de tiroir 38. L’ensemble clapet 34 tubulaire décrit ci-dessus pourrait être incorporée dans n’importe quel autre système d’un véhicule nécessitant ce type de clapet pour bloquer sélectivement une ouverture de la manière décrite. supply 58 of the drawer body 36. The maximum deformation of the arms 72, 74, 82 is limited by radial stops in the drawer insert 38. The tubular valve assembly 34 described above could be incorporated into any other system of a vehicle requiring this type of valve to selectively block an opening as described.
L'homme du métier appréciera que l'invention puisse être modifiée pour prendre de nombreuses variantes sans se départir de la portée des revendications en annexe.  Those skilled in the art will appreciate that the invention can be modified to take many variants without departing from the scope of the appended claims.
Nous allons décrire dans ce qui suit la méthode de réalisation et d’assemblage de l’invention décrite précédemment pour les deux modes de réalisation:  We will describe in what follows the method of making and assembling the invention described above for the two embodiments:
La méthode d’assemblage du dispositif de commandel2 comprend les étapes suivantes : The method of assembling the commandel2 device includes the following steps:
100/ insérer l’ensemble clapet de commande 34 dans le corps de tiroir 36, 100 / insert the control valve assembly 34 into the drawer body 36,
110/ insérer l’insert de tiroir 38 dans l’ensemble de l’étape précédente 100,110 / insert the drawer insert 38 in the whole of the previous step 100,
120/ insérer l’anneau d’arrêt 42 ondulé dans l’ensemble de l’étape précédente 110, 120 / insert the wavy stop ring 42 in the assembly of the previous step 110,
130/ insérer le ressort de compression 40 dans le corps 28,  130 / insert the compression spring 40 into the body 28,
140/ insérer l’ensemble tiroir 30 dans le corps 28,  140 / insert the drawer assembly 30 into the body 28,
150/ sertir l’élément hydraulique 16 avec l’actionneur électromagnétique 14,  150 / crimp the hydraulic element 16 with the electromagnetic actuator 14,
Le dispositif de commande 12 assemblé est ensuite placé sur le moteur 10 puis une vis est vissée au travers de la pâte de fixation 26 de sorte à venir serrer pour l’arrêt axial et en rotation. The assembled control device 12 is then placed on the motor 10 and then a screw is screwed through the fixing paste 26 so as to come to tighten for the axial stop and in rotation.
LISTE DES REFERENCES UTILISEES LIST OF REFERENCES USED
10 moteur 10 motor
12 dispositif de commande  12 control device
13 déphaseur d'arbre à came  13 camshaft phase shifter
14 actionneur électromagnétique 14 electromagnetic actuator
16 élément hydraulique  16 hydraulic element
18 connecteur  18 connector
20 bobine  20 reel
22 tige 24 boîtier 22 rod 24 case
26 pâte de fixation  26 fixing paste
28 corps  28 bodies
29 alésage  29 bore
30 ensemble tiroir 30 drawer set
32 joint  32 seal
34 ensemble clapet de commande 36 corps de tiroir  34 control valve assembly 36 drawer body
38 insert de tiroir  38 drawer insert
40 ressort de compression40 compression spring
42 anneau d'arrêt 42 stop ring
44 rondelle  44 washer
45 chambre interne  45 internal chamber
46 port d'avance  46 port ahead
48 port de retard 48 delay port
50 port d'alimentation  50 power port
52 port de drainage  52 drainage port
53 filtre  53 filter
54 ouverture d'avance  54 opening in advance
56 ouverture de retard 56 delay opening
58 ouverture d'alimentation 58 feed opening
60 ouverture de recirculation60 recirculation opening
62 palette 62 pallet
66 première extrémité  66 first end
67 deuxième extrémité 67 second end
68 anneau rigide  68 rigid ring
70 clapet  70 valve
72 bras  72 arms
74 bras  74 arms
76 élément d'indexation 76 indexing element
78 ouverture  78 opening
80 extrémité  80 end
82 bras  82 arms
84 barre longitudinale  84 longitudinal bar
86 élément rigide 86 rigid element

Claims

REVENDICATIONS
1. Dispositif de commande (12) d’un déphaseur d’arbre à cames (13) prévu pour verrouiller ou libérer un rotor d’un déphaseur d’arbre à cames (13) d’un moteur (10) à combustion interne, le dispositif de commande (12) comprenant : 1. Control device (12) for a camshaft phase shifter (13) designed to lock or release a rotor from a camshaft phase shifter (13) of an internal combustion engine (10), the control device (12) comprising:
- un élément hydraulique (16) comprenant un corps (28), un ensemble tiroir (30) ayant un corps de tiroir (36), un joint (32) et un ensemble clapet (34) comprenant un premier clapet (70), un deuxième clapet (71) et un troisième clapet (73) et ;  - a hydraulic element (16) comprising a body (28), a drawer assembly (30) having a drawer body (36), a seal (32) and a valve assembly (34) comprising a first valve (70), a second valve (71) and a third valve (73) and;
- un actionneur électromagnétique (14) relié à l’ensemble tiroir (30) de l’élément hydraulique (16) pouvant se déplacer selon un axe longitudinal (X) entre :  - an electromagnetic actuator (14) connected to the slide assembly (30) of the hydraulic element (16) which can move along a longitudinal axis (X) between:
-une première position dans laquelle le premier clapet (70) ouvre ou ferme une première communication de fluide (Fl) entre un port d’avance (46) du corps de tiroir (36) et une chambre d’avance du déphaseur d’arbre à cames (13) et, -a first position in which the first valve (70) opens or closes a first fluid communication (Fl) between an advance port (46) of the slide body (36) and an advance chamber of the shaft phase shifter with cams (13) and,
-une deuxième position dans laquelle le deuxième clapet (71) et le corps de tiroir (36) ouvrent ou ferment une deuxième communication de fluide (F2) entre un circuit d’huile provenant du moteur (10) et un port d’alimentation (50) du corps de tiroir (36) et, a second position in which the second valve (71) and the drawer body (36) open or close a second fluid communication (F2) between an oil circuit coming from the engine (10) and a supply port ( 50) of the drawer body (36) and,
-une troisième position dans laquelle le troisième clapet (73) et le corps de tiroir (36) ouvrent ou ferment une troisième communication de fluide (F3) entre un port de retard (48) du corps de tiroir (36) et une chambre de retard du déphaseur d’arbre à cames (13) et ,  -a third position in which the third valve (73) and the drawer body (36) open or close a third fluid communication (F3) between a delay port (48) of the drawer body (36) and a camshaft phase shifter delay (13) and,
l’ensemble clapet (34) comprenant au moins trois clapets (70, 71, 73) intégrés dans une pièce monobloc flexible, chaque clapet (70,71 ,73) comprenant au moins une palette (62) reliée à deux bras (72, 74) flexibles et en ce que le clapet the valve assembly (34) comprising at least three valves (70, 71, 73) integrated in a flexible monobloc piece, each valve (70, 71, 73) comprising at least one pallet (62) connected to two arms (72, 74) flexible and in that the valve
(70,71,73) est relié à deux anneaux rigides (68) contigus. (70,71,73) is connected to two contiguous rigid rings (68).
2. Dispositif de commande (12) selon la revendication 1 dans laquelle l’ensemble clapet (34) comprend une barre longitudinale (84) et au moins trois clapets (70,71,73) intégrés dans une pièce monobloc flexible, le clapet (70,71,73) comprenant au moins une palette (62) reliée à un bras (82) flexible s’étendant le long de l’axe (X) longitudinal et la barre longitudinale (84) reliant le clapet (70,71,73) au clapet (70,71,73) contigu. 2. Control device (12) according to claim 1 wherein the valve assembly (34) comprises a longitudinal bar (84) and at least three valves (70,71,73) integrated in a flexible monobloc piece, the valve ( 70, 71, 73) comprising at least one pallet (62) connected to a flexible arm (82) extending the along the longitudinal axis (X) and the longitudinal bar (84) connecting the valve (70,71,73) to the contiguous valve (70,71,73).
3. Méthode de réalisation du dispositif de commande (12) selon l’une quelconque des revendications 1 à 2 comprenant les étapes suivantes : 3. Method for producing the control device (12) according to any one of claims 1 to 2 comprising the following steps:
- insérer l’ensemble clapet (34) dans le corps de tiroir (36),  - insert the valve assembly (34) into the drawer body (36),
- insérer un insert de tiroir (38) dans l’ensemble réalisé à l’étape précédente,  - insert a drawer insert (38) into the assembly produced in the previous step,
- insérer un anneau d’arrêt (42) ondulé dans l’ensemble de l’étape précédente,  - insert a wavy stop ring (42) throughout the previous step,
- insérer un ressort de compression (40) dans le corps (28) de l’élément hydraulique (16),  - insert a compression spring (40) in the body (28) of the hydraulic element (16),
- insérer l’ensemble tiroir (30) dans le corps (28) de l’élément hydraulique - insert the drawer assembly (30) into the body (28) of the hydraulic element
(16), (16)
- sertir l’élément hydraulique (16) avec l’actionneur électromagnétique  - crimp the hydraulic element (16) with the electromagnetic actuator
EP19732402.3A 2018-07-04 2019-06-27 Device for controlling a camshaft phaser Withdrawn EP3818254A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1856149A FR3083569B1 (en) 2018-07-04 2018-07-04 CAMSHAFT DEPHASER CONTROL DEVICE
PCT/EP2019/067182 WO2020007709A1 (en) 2018-07-04 2019-06-27 Device for controlling a camshaft phaser

Publications (1)

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EP3818254A1 true EP3818254A1 (en) 2021-05-12

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EP (1) EP3818254A1 (en)
KR (1) KR20210028195A (en)
CN (1) CN112352091A (en)
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KR20210028195A (en) 2021-03-11
FR3083569B1 (en) 2020-11-27
FR3083569A1 (en) 2020-01-10
WO2020007709A1 (en) 2020-01-09
US20210148255A1 (en) 2021-05-20
US11346259B2 (en) 2022-05-31
CN112352091A (en) 2021-02-09

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