EP2385538B1 - Elektromagnetisches Schütz mit Doppelkontakt und damit versehener Anlasser eines Verbrennungsmotor - Google Patents

Elektromagnetisches Schütz mit Doppelkontakt und damit versehener Anlasser eines Verbrennungsmotor Download PDF

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Publication number
EP2385538B1
EP2385538B1 EP11152651A EP11152651A EP2385538B1 EP 2385538 B1 EP2385538 B1 EP 2385538B1 EP 11152651 A EP11152651 A EP 11152651A EP 11152651 A EP11152651 A EP 11152651A EP 2385538 B1 EP2385538 B1 EP 2385538B1
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EP
European Patent Office
Prior art keywords
contact
contactor
micro
stirrup
winding
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.)
Not-in-force
Application number
EP11152651A
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English (en)
French (fr)
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EP2385538A1 (de
Inventor
Stéphane PLAIDEAU
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Valeo Equipements Electriques Moteur SAS
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Valeo Equipements Electriques Moteur SAS
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Publication of EP2385538A1 publication Critical patent/EP2385538A1/de
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Publication of EP2385538B1 publication Critical patent/EP2385538B1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current

Definitions

  • the invention relates to the field of thermal motor starters in motor vehicles. More particularly, the invention relates to an improved electromagnetic contactor type called double contact for inclusion in starters.
  • Starters with electromagnetic contactors with double contact are known in the state of the art. Such a starter 1a according to the prior art, including a contactor 10a, is described below with reference to FIG. Fig.1 .
  • the contactor 10a comprises a body 104 in which translational movement a plunger 100 whose front end 101 is provided with a finger 1010.
  • the rear end of the plunger 100 actuates two movable contact plates CM1 and CM2 for establish galvanic contacts between contact terminals C11, C12 and C21, C22.
  • a return spring core 103 is disposed between the body and the front end 101 of the plunger 100 and exerts a restoring force opposing a translation thereof backwards.
  • the contactor 10a also comprises two windings, L m and L a , having a common end. Another end of the winding L m is connected to an electrical ground M (conventionally connected to the chassis of the vehicle). Another end of the winding L a is connected to the terminals C12, C22 and an electric brush B1. The end common to the two windings, L m and L a , is connected to the positive terminal ("B +") of a battery 12 via a starting contact 13 of the vehicle (or any similar body acting). The terminal C21 is connected directly to the positive terminal B + of the battery 12. The terminals C11 is connected to the positive terminal of the battery 12 through a current limiting resistor RD.
  • the starter 1a comprises an electric motor 11.
  • This engine 11 is constituted conventionally an armature or rotor 110 (winding L3) and an inductor or stator 114 which may comprise permanent magnets.
  • the armature 110 is fed conventionally via a slip ring 115, disposed at the rear of the motor 11, and two brushes B1 and B2, the brush B1 said positive being connected to the terminals C12, C22 and the broom B2 says negative being connected to mass M.
  • a launcher here comprising a launcher pinion assembly 113, free wheel 112, meshing spring 115 and a pulley (not shown) in which is engaged a fork 15.
  • a helical ramp 111 is also provided at the front of the motor 11.
  • the mechanical coupling between the contactor 10a is the motor 11 is obtained by the fork 15 movable about an axis of rotation ⁇ 1. As it appears in Fig.1 , the upper end of this fork 15 is driven by the finger 1010.
  • the lower end of the fork 15 is mechanically coupled to the launcher pulley, at the rear of the meshing spring 115, itself arranged between this lower end and the freewheel 112.
  • the movable contact plate CM1 bypasses the contact terminals C11 and C12 (closed position), the contact terminals C21 and C22 remaining non-short. circuited (open position).
  • the contact terminals C11 and C12 in the closed position connect, through the current limiting resistor RD, the positive brush B1 to the positive terminal B + of the battery 12 and feeds by running the motor 11, the electric circuit closing by the negative brush B2.
  • the armature 110 (rotor) of the motor 11 begins to rotate about its axis of rotation ⁇ 2 in reduced regime, that is to say, at reduced speed and torque, because of the current limitation imposed by the resistance RD , which also causes a rotation R of the pinion 113.
  • the pinion 113 approaches the ring gear 14 of the engine.
  • the movable contact plate CM2 bypasses the contact terminals C21 and C22 (closed position), the contact terminals C11 and C12 remaining in the closed position.
  • the contact terminals C21 and C22 in the closed position directly connect the positive brush B1 to the positive terminal B + of the battery 12.
  • the motor 11 is then powered at full speed and rotates the engine for a start operation.
  • the call winding L a is short-circuited since there has more potential difference between the end common to the two windings, L m and L a , and the contact C21-C22 both connected to the positive terminal of the battery 12.
  • the movable contact pads CM1 and CM2 are maintained in position closed by the holding winding L m , acting on the plunger 100 and the return spring core 103.
  • the electromagnetic force that developed in the contactor 10a ceases, the holding winding L m is no longer supplied.
  • the plunger 100 is returned to its rest position by the spring 103 and the electrical connection battery 12 - motor 11 is broken.
  • the motor 11 is no longer powered stops driving the pinion 113 in rotation.
  • the plunger 100 returns to its initial position (towards the rear), it acts on the fork 15 which disengages the pinion 113 of the crown 14.
  • the invention relates to a double-contact electromagnetic contactor for a heat engine starter, comprising a plunger core, a first call winding, a second holding winding, a movable contact pad and first, second and third contact pads, the contactor having three operating states: a first state without electrical contact between the contact pads, a second state with an electrical contact between the first and second contact pads and a third state with an electrical contact between the first, second and third contact pads.
  • the contactor also comprises an electrically controllable micro-actuator for enabling or prohibiting, according to the electrical control applied to it, switching between the second and third operating states, said switching being prohibited by the micro-actuator. by means of a force opposing a thrust of the movable contact plate when the micro-actuator is electrically excited.
  • the presence of the electrically controllable micro-actuator allows control of the delay between the second and third operating states of the contactor. It thus becomes possible to better control the sequencing of control of a starter and to easily adapt this sequencing to different applications of the starter.
  • the electrically controllable micro-actuator is a micro-solenoid.
  • the micro-solenoid comprises a contact stirrup, preferably made of copper, and an assembly comprising an electric coil and a movable magnetic core, the assembly being arranged between two jaws of the stirrup-contact.
  • the stirrup-contact is provided to support the passage of a power current in the contactor, in the second and third operating states of the contactor.
  • the assembly indicated above also comprises a tank forming part of the magnetic circuit of the micro-solenoid and forming a housing for the electric coil.
  • the tank housing the electrical coil is integral with a wall of the contactor and the stirrup-contact is integral with the movable core.
  • the micro-solenoid also comprises a conductive braid, preferably copper, having a first end connected to the contact stirrup and a second end connected to the second contact pad.
  • the movable contact plate and the contact stirrup are able to come into contact during the second and third operating states of the contactor.
  • stirrup-contact and the third contact pad are able to come into contact during the third state of operation of the contactor.
  • the invention also relates to a starter for a heat engine, equipped with a double contact electromagnetic contactor and an electronic control device.
  • the electromagnetic contactor included in the starter is as briefly described above.
  • the starter according to the invention is particularly well suited for applications in motor vehicles equipped with the automatic stop-recovery function of the engine, also called “stop / start” or “stop &go” in English.
  • the general configuration of a starter according to the invention takes up most of the configuration described with regard to the Fig.1 , that is to say a general configuration, in itself, in accordance with the prior art.
  • the invention has an additional advantage because it does not require substantial modifications and remains compatible with technologies commonly used in the automotive industry.
  • a starter with electromagnetic control now referenced 1
  • a contactor now referenced 10
  • the contactor 10 has particular double-contact characteristics which will be described hereinafter.
  • an electronic control device ECC is provided for controlling the contactor 10.
  • the different components of the starter 1 according to the invention are supplied with electrical energy by a battery 12.
  • the battery 12 supplies also the ECC electronic control device.
  • the contactor 10 comprises a double contact device 10dc which differs very substantially from the double contact device according to the prior art of the Fig.1 .
  • the double contact device 10dc essentially comprises a movable contact pad CM, an electrically controllable micro-actuator in the form of a micro-solenoid MS, and three contact pads PC +, PC1 and PC2.
  • the movable contact plate CM is actuated in translation by the rear end of the plunger 100 and is intended to establish a galvanic contact between the contact pad PC + and a mobile magnetic core NM of the micro-solenoid MS.
  • the micro-solenoid MS is shown schematically at the Fig.2 to facilitate understanding of the operation of the double contact device 10dc
  • the movable core NM is made for example of soft iron so as to have magnetic properties and electrical conduction.
  • the micro-solenoid MS comprises a contact stirrup, for example made of copper, for the passage of the power electric current of the starter 1.
  • the moving core NM is electrically connected to the contact pad PC1 by an electrically conductive braid TS.
  • the braid TS is preferably copper.
  • the micro-solenoid MS comprises an electric coil BO whose end is connected to the common end of the windings L a and L m which is connected to the terminal B + of the battery 12. The other end of the coil BO is connected to a connection terminal (not marked) of the electronic control device ECC.
  • the contact pad PC + is connected to the terminal B + of the battery 12.
  • the contact pad PC1 is connected to a connection terminal (not marked) of the electronic control device ECC and to the brush B1 through the current limiting resistor DR.
  • the contact pad PC2 is connected directly to the brush B1.
  • the ECC electronic control device is supplied with electrical energy after closure of the starting contact 13, via a link 20 allowing connection to the terminal B + of the battery 12.
  • the electronic control device ECC is also connected to the winding L a , through a link 21, and controls the excitation thereof by allowing a connection to the mass M of the end of the winding L to other than that connected to the common end of the windings L a and L m .
  • Figs.3A to 3C are schematic drawings voluntarily simplified to facilitate the understanding of the reader.
  • the double contact device 10dc is shown in the open state designated "OV state" hereinafter.
  • This state corresponds to a non-activation of the ignition contact 13.
  • the electric motor 11 is not powered, no electrical connection being established between the contact pad PC + connected to the terminal B + of the battery 12 and one or other of the contact pads PC1, PC2.
  • the movable contact pad CM is kept in its rest state by the mainspring spring 103 ( Fig.2 ).
  • the micro-solenoid MS is not excited and the mobile core NM is also in its idle state.
  • the double contact device 10dc is shown in a first closed state, namely, in a "1st closed contact” state, designated “state 1 CF” below, which corresponds to the closed state of the C11-C12 contact of the prior art shown in Fig.1 .
  • the start contact 13 has been closed and is kept closed.
  • the movable contact plate CM is pushed in translation by the plunger 100 and provides electrical contact between the contact pad PC + and the mobile core NM.
  • the mobile core NM being connected to the contact pad PC1 through the braid TS, the electrical contact is thus ensured between the contact pad PC + and the PC1 contact pad.
  • the coil BO of the micro-solenoid MS is excited here and the core NM exerts a force f 3 opposing the thrust of the movable contact plate CM, as shown in FIG. 3B in which the plate CM is shown slightly at an angle.
  • the excitation of the coil BO therefore prohibits the translation of the mobile core NM and the electrical circuit remains open between the PC + and PC2 pads.
  • An electrical connection is established only between the contact pad PC + and the contact pad PC1 and the electric motor 11 is supplied in reduced regime through the current limiting resistor RD.
  • the double contact device 10dc is shown in a second closed state, namely, in a "2nd closed contact” state, designated “2CF state” hereinafter, which corresponds to the closed state of the C21-C22 contact of the prior art shown in Fig.1 .
  • the design of the double contact device 10dc according to the invention allows an adjustable time delay between the 1CF state and the 2CF state, the transition from the first state to the second state being controlled by the de-excitation of the micro-solenoid MS, itself controlled. by the electronic control device ECC.
  • FIGS. Figs.4A and 4B A practical embodiment of the contactor 10 according to the invention is shown in FIGS. Figs.4A and 4B in the open state OV and the 2nd closed contact state 2CF described with reference to Figs.3A and 3C .
  • the contactor 10 is shown in longitudinal section at Figs.4A and 4B in order to show the implantation of the micro-solenoid MS therein.
  • the different functional elements of the double contact device 10dc appear at Figs.4A and 4B , with the exception of PC1 contact pad.
  • micro-solenoid MS is now described in detail with reference to Figs.5, 6A, 6B and 6C .
  • the micro-solenoid MS comprises, in addition to the coil BO and the moving core NM, an AN tank forming a coil housing and forming part of the magnetic circuit, a contact stirrup ET made of copper for the passage of the electric power current and a spring RE.
  • the tank AN has an inner housing (visible to Figs.4A and 4B ) in which the BO coil is placed.
  • the tank AN, containing the coil BO, and the spring RE are inserted into the movable core NM and the assembly is inserted between the upper and lower jaws of the stirrup-contact ET.
  • One end of the copper braid TS is fixed on the contact stirrup ET, the other end thereof being connected to the contact pad PC1.
  • An assembly with clamping of the movable core NM between the jaws of the stirrup-contact ET allows the mechanical strength of all parts of the micro-solenoid MS.
  • the mounting and the mechanical positioning of the micro-solenoid MS in the double contact device 10dc are provided through the tank AN which is integral with a wall of the device 10dc.
  • the Fig.6A shows the state of the micro-solenoid MS when the double contact device 10dc is in the OV state.
  • the spring RE provides a thrust P R on the contact stirrup ET, and the latter and the mobile core NM are thus pushed down, without any electrical contact with the mobile plate MC and the stud. PC2.
  • the Fig.6B shows the state of the micro-solenoid MS when the double contact device 10dc is in the state 1 CF.
  • the coil BO is energized and the force f 3 applied to the movable core NM and the stirrup-contact ET is added to the thrust P R of the spring RE and opposes their displacement under the action of the mobile plate CM.
  • the Fig.6C shows the state of the micro-solenoid MS when the double contact device 10dc is in the 2CF state.
  • state 2CF coil BO is no longer energized.
  • the thrust P R of the spring RE is not sufficient to oppose the displacement of the core NM and the calliper ET under the action of the mobile plate MC.
  • the core NM and the calliper ET come into high position and the electrical contact is then ensured between the mobile plate MC and the pads PC1 and PC2, via the core-stirrup assembly NM-ET and the braid TS.
  • the electronic control device ECC is now described in detail with reference to Figs.7 , 8A, 8B and 8C .
  • the ECC device can be housed inside a cover of the contactor 10.
  • the ECC device can be made in the form of an ASIC.
  • the electronic control device ECC is an analog type circuit.
  • the ECC device essentially comprises three transistors T1, T2 and T3, two voltage stabilization circuits CZ1 and CZ2, three circuits RC1, RC2 and RC3 with a time constant and a switching lock circuit SL.
  • Transistors T1, T2 and T3 are here of MOSFET type. Transistors T1 and T3 control the excitation of the call winding L a and the coil BO, respectively.
  • a drain electrode of the transistor T1 is connected to the end of the winding L a other than that connected to the common end of the windings L a and L m .
  • a source electrode of the transistor T1 is connected to the ground M.
  • a drain electrode of the transistor T3 is connected to the end of the coil BO other than that connected to the common end of the windings L a and L m .
  • a source electrode of the transistor T3 is connected to the ground M.
  • the transistor T2 is intended to force the opening of the transistor T1 by connecting the ground M the gate thereof at the end of excitation of the winding L a .
  • the transistor T2 comprises drain and source electrodes respectively connected to the gate of the transistor T1 and to the ground M.
  • the voltage stabilization circuits CZ1 and CZ2 are conventional Zener diode circuits.
  • the circuit CZ1 is formed of a resistor R6 and a zener diode Z1 and provides a stabilized voltage U1.
  • the voltage U1 is produced from a voltage U APC which is available for the ECC device after the closing of the starting contact 13.
  • the voltage U APC thus corresponds to the voltage U B of the battery 12 after closure of the start contact. 13.
  • the circuit CZ2 is formed of a resistor R7 and a zener diode Z2 and provides a stabilized voltage U2.
  • the voltage U2 is produced from a voltage U PC1 available on the contact pad PC1 in the state 1CF of the double contact device 10dc.
  • the voltage U PC1 therefore corresponds to the voltage U B when it becomes available on the pad PC1.
  • the voltage stabilization circuit CZ1 supplies the voltage U1 to the circuits RC1 and RC2.
  • the voltage stabilization circuit CZ2 supplies the voltage U2 to the circuits RC3 and SL.
  • the RC1 circuit is of RC integrator circuit type and comprises two resistors R1 and R2 in series with a capacitor C1.
  • the voltage U1 is applied to a first terminal of the resistor R1, a second terminal of which is connected to a first terminal of the capacitor C1.
  • a second terminal of capacitor C1 is connected to a first terminal of resistor R2, a second terminal of which is connected to ground M.
  • the point of connection between the terminals of resistor R1 and capacitor C1 is connected to the control gate of the transistor T1.
  • the RC2 circuit is a derivation-type RC circuit and comprises a capacitor C3 in series with a resistor R5.
  • the voltage U1 is applied to a first terminal of the capacitor C3.
  • a second terminal of the capacitor C3 is connected to a first terminal of the resistor R5, a second terminal of which is connected to the ground M.
  • the point of connection between the terminals of the capacitor C3 and the resistor R5 is connected to a control gate of the transistor T3.
  • the RC3 circuit is an integrating type RC circuit and comprises a resistor R3 in series with a capacitor C2.
  • the voltage U2 is applied to a first terminal of the resistor R3.
  • a second terminal of the resistor R3 is connected to a first terminal of the capacitor C2, a second terminal of which is connected to the ground M.
  • the point of connection between the terminals of the resistor R3 and the capacitor C2 is connected to a control gate of the transistor T2.
  • the switching lock circuit SL has a switching diode D1 in series with a resistor R4.
  • the voltage U2 is applied to an anode of the diode D1, a cathode of which is connected to a first end of the resistor R4.
  • a second end of the resistor R4 is connected to the gate of the transistor T1.
  • the time t0 of the curves of Figs.8A, 8B and 8C corresponds to the closing of the starting contact 13.
  • the voltage U APC is supplied to the voltage stabilization circuit CZ1 which applies the stabilized voltage U1 to the circuits RC1 and RC2.
  • the excitation of the winding L a by the current I a causes the displacement of the movable core 100 of the contactor 10 and the double contact device 10dc switches to the state 1CF at time t1.
  • Switching the double contact device 10dc to the 1CF state shows the voltage U PC1 on the contact pad PC1, as shown in FIG. Fig.8A .
  • the voltage U PC1 supplies the voltage stabilization circuit CZ2 which then supplies the stabilized voltage U2 to the switching lock circuit SL and to the circuit RC3.
  • the voltage U2 raises the voltage potential at the gate of the transistor T1 to a value equal to approximately U2 - 0.6V, 0.6 V being the voltage drop due to the diode D1. This rise in potential on the gate of transistor T1 locks transistor T1 in the closed state and thus avoids eventual switching rebounds.
  • the transistor T2 remains in the open state despite the appearance of the voltage U2, because of the time constant R3.C2 imposed by the RC3 circuit.
  • the motor 11 is powered by the voltage U PC1 and starts its rotation in reduced speed. It follows a fall of the voltage U B and consecutively of the voltage U PC1 , visible at the Fig.8A due to the power current supplied to the motor 11. The drop in the voltage U B due to the motor 11 also produces a weakening of the currents I a and I ms , as shown in FIGS. Figs.8B and 8C but which remain of sufficient amplitude to maintain a correct excitation of the coil BO and winding L a .
  • the charging voltage of the capacitor C3 reaches a value such that the voltage on the gate of the transistor T3 is no longer sufficient to maintain it in conduction.
  • the transistor T3 then switches to the open state and interrupts the current I ms in the coil BO, as it appears in FIG. Fig.8C .
  • PC2 contact pad double contact device 10dc is set at a voltage U PC2 PC1 .sensiblement equal to U and U B.
  • the voltage PC2 U then feeds the engine 11 at full speed, the starter pinion 113 being at this stage engaged in the ring gear 14 of the engine.
  • the current I a is maintained in the call winding L a until time t3.
  • This maintenance of the excitation of the call winding L has for a duration equal to t3-t2 makes it possible to guard against a possible backtracking of the starter pinion 113. Maintaining the excitation of the winding of the appeal has to t3 can last a few milliseconds to tens of milliseconds after the time t2 according to the applications of the invention.
  • the time t3 is determined by the time constant R3.C2 of the circuit RC3. At time t3, the charging voltage of capacitor C2 has reached a value sufficient to control transistor T2 in conduction. Transistor T2 switches to the closed state and earths the gate of transistor T1. The transistor T1 then switches from the closed state to the open state and interrupts the current I a in the winding L a .

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  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Relay Circuits (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Contacts (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Electromagnets (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (10)

  1. Elektromagnetisches Schütz mit Doppelkontakt für einen Anlasser eines Verbrennungsmotors, das einen Tauchkern (100), eine erste, so genannte Einzugswicklung (La), eine zweite, so genannte Haltewicklung (Lm), eine bewegliche Kontaktplatte (CM) und erste, zweite und dritte Kontaktstücke (PC+, PC1 und PC2) enthält, wobei das Schütz drei Betriebszustände hat: einen ersten Zustand (OV) ohne elektrischen Kontakt zwischen den Kontaktstücken (PC+, PC1, PC2), einen zweiten Zustand (1CF) mit einem elektrischen Kontakt zwischen dem ersten und dem zweiten Kontaktstück (PC+, PC1) und einen dritten Zustand (2CF) mit einem elektrischen Kontakt zwischen dem ersten, dem zweiten und dem dritten Kontaktstück (PC+, PC1, PC2), wobei das Schütz ebenfalls einen elektrisch steuerbaren Mikroaktor (MS) enthält, um je nach der an ihn angewendeten elektrischen Steuerung (Ims) eine Umschaltung zwischen dem zweiten (1CF) und dritten (2CF) Betriebszustand zu erlauben oder zu verhindern, dadurch gekennzeichnet, dass die Umschaltung vom Mikroaktor (MS) mittels einer Kraft (f3) verhindert wird, die sich einem Schub der beweglichen Kontaktplakette (CM) widersetzt, wenn der Mikroaktor (MS) elektrisch angeregt wird.
  2. Schütz nach Anspruch 1, dadurch gekennzeichnet, dass der elektrisch steuerbare Mikroaktor ein Mikrosolenoid (MS) ist.
  3. Schütz nach Anspruch 2, dadurch gekennzeichnet, dass das Mikrosolenoid (MS) einen Kontaktbügel (ET), vorzugsweise aus Kupfer, und eine Einheit enthält, die eine elektrische Spule (BO) und einen beweglichen Magnetkern (NM) aufweist, wobei die Einheit zwischen zwei Backen des Kontaktbügels (ET) angeordnet ist.
  4. Schütz nach Anspruch 3, dadurch gekennzeichnet, dass der Kontaktbügel (ET) vorgesehen ist, um den Durchgang eines Leistungsstroms im Schütz in den zweiten (1CF) und dritten (2CF) Betriebszuständen des Schützes zu vertragen.
  5. Schütz nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Einheit ebenfalls eine Mulde (AN) aufweist, die Teil des Magnetkreises des Mikrosolenoids (MS) ist und eine Aufnahme für die elektrische Spule (BO) bildet.
  6. Schütz nach Anspruch 5, dadurch gekennzeichnet, dass die die elektrische Spule (BO) aufnehmende Mulde (AN) fest mit einer Wand des Schützes und der Kontaktbügel (ET) fest mit dem beweglichen Kern (NM) verbunden ist.
  7. Schütz nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass das Mikrosolenoid (MS) ebenfalls eine leitende Litze (TS), vorzugsweise aus Kupfer, enthält, deren erstes Ende mit dem Kontaktbügel (ET) und ein zweites Ende mit dem zweiten Kontaktstück (PC1) verbunden ist.
  8. Schütz nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass die bewegliche Kontaktplatte (CM) und der Kontaktbügel (ET) in den zweiten (1CF) und dritten (2CF) Betriebszuständen des Schützes in Kontakt kommen können.
  9. Schütz nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass der Kontaktbügel (ET) und das dritte Kontaktstück (PC2) im dritten Betriebszustand (2CF) des Schützes in Kontakt kommen können.
  10. Anlasser für einen Verbrennungsmotor, der mit einem elektromagnetischen Schütz mit Doppelkontakt (1) und mit einer elektronischen Steuervorrichtung (ECC) ausgestattet ist, dadurch gekennzeichnet, dass das elektromagnetische Schütz einem der Ansprüche 1 bis 9 entspricht.
EP11152651A 2010-05-07 2011-01-31 Elektromagnetisches Schütz mit Doppelkontakt und damit versehener Anlasser eines Verbrennungsmotor Not-in-force EP2385538B1 (de)

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EP2385538A1 (de) 2011-11-09
CN102270548A (zh) 2011-12-07
JP2011256861A (ja) 2011-12-22
US8446238B2 (en) 2013-05-21
ES2384221T3 (es) 2012-07-02
FR2959862B1 (fr) 2015-01-02
CN102270548B (zh) 2014-05-14
FR2959862A1 (fr) 2011-11-11
US20110273250A1 (en) 2011-11-10
JP5603290B2 (ja) 2014-10-08

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