EP1332286A1 - Dispositif de demarrage pour moteurs a combustion interne - Google Patents

Dispositif de demarrage pour moteurs a combustion interne

Info

Publication number
EP1332286A1
EP1332286A1 EP01988822A EP01988822A EP1332286A1 EP 1332286 A1 EP1332286 A1 EP 1332286A1 EP 01988822 A EP01988822 A EP 01988822A EP 01988822 A EP01988822 A EP 01988822A EP 1332286 A1 EP1332286 A1 EP 1332286A1
Authority
EP
European Patent Office
Prior art keywords
starting device
locking
pinion
starter pinion
starter
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Withdrawn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
EP01988822A
Other languages
German (de)
English (en)
Inventor
Siegfried Schustek
Karl-Otto Schmidt
Frank Klein
Steffen Fuhr
Ingo Richter
Sven Hartmann
Juergen Kugler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE10150714A external-priority patent/DE10150714A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1332286A1 publication Critical patent/EP1332286A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F02N15/062—Starter drives
    • F02N15/065—Starter drives with blocking means
    • 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
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/026—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the centrifugal type

Definitions

  • the invention relates to a starting device for starting internal combustion engines according to the preamble of claim 1.
  • a so-called starter pinion of the starting device is first turned into a ring gear to start the internal combustion engine
  • the single-track system of the starter pinion consists of a steep thread on the starter's output shaft and a cooperating driving sleeve that carries a freewheel and the starter pinion at the front.
  • the steep thread on the output shaft pushes the pinion axially forward when it rotates relative to the rotor of the starter motor by initially starting the motor without load when the starter is switched on.
  • Pinion and freewheel rotate because of their Mass inertia not yet, but move forward through the steep thread.
  • the pinion is in contact with the ring gear, it is additionally held there against rotation and thus advanced further until it is in contact with a stop. From this point on, the
  • a so-called brake screw drive starter works in a similar way.
  • the driver sleeve interacting with the steep thread is additionally braked during the engagement process of the pinion.
  • a starting device is also known in which the driving sleeve is also provided with a locking toothing which interacts with a pawl fastened in the starter housing in order to secure the pinion against being twisted when the pinion is advanced.
  • the pawl falls into an annular groove in the driving sleeve and thus locks the pinion against back-tracking during the starting process.
  • the pawl is actuated by an additional actuator at the start of the starting process and only comes into its unlocked state after the actuator has been switched off by a pretensioned spring, in which it then releases the pinion to be retraced.
  • screw drive starters are used for internal combustion engines, in which a starter relay starts the starter pinion Start process over the steep thread in the ring gear of the internal combustion engine.
  • a switch contact for the starter motor is usually also included in the starter relay.
  • the starter pinion must be held in the single-track position during the entire starting process via a holding winding of the start relay.
  • a starting device is known from EP 0725 216 B1, in which a starting relay for switching on the starter motor is arranged in the rear part of the starting device, which activates a locking of the starter pinion via a cable.
  • the locking initially prevents the pinion from rotating, so that when the starter motor starts, it can initially mesh into the ring gear of the internal combustion engine with the help of the steep thread.
  • the lock also includes a backstop, with which the starter pinion is held in its engagement position. When the starter relay is switched off, the track lock is finally released again by means of a spring previously tensioned by the cable.
  • the aim of the present solution is to provide a backstop lock for the starter pinion during the starting process, which can be implemented with simple means without an additional actuator and independently of switching the starter motor.
  • the starting device according to the invention with the feature mentioned in the characterizing part of patent claim 1 has the advantage that the proposed reverse track lock takes effect automatically and thus without an actuator after the pinion has been advanced and is automatically unlocked to release the disengagement process after the internal combustion engine has started up.
  • This solution can be implemented for screw drive, thrust screw drive and brake screw drive starters.
  • the start relay can be built away from the starter device.
  • these starters can also be easily equipped with a countershaft with the proposed jerk lock.
  • the holding winding can be omitted for the starter relay, since their function differs from that proposed backstop lock is adopted.
  • Another advantage is that the starter pinion is automatically disengaged when the internal combustion engine is running, so that the pinion is prevented from continuing to run until the starting device is switched off. This not only reduces wear, but also that
  • the retraction lock has at least one locking element which, with the locking force of a pretensioned spring after the starter pinion has been pre-engaged, automatically secures it against backtracking until the release is activated.
  • the locking element is expediently designed as a centrifugal force mass for the centrifugal force-controlled response of the unlocking.
  • the tracking lock is arranged in a constructively expedient manner between the output shaft of the starter and the starter pinion which is axially displaceably mounted thereon.
  • Radial bore is used and the spring is biased against an abutment at the outer end of the radial bore, preferably against a closing plate of the radial bore.
  • a redundant solution is proposed in which several identical locking elements are distributed around the inner circumference of the starter pinion. Despite the spring break on one or more locking elements, the function of the track lock can still be ensured.
  • a structurally simple and inexpensive solution can be realized in that a segmented spring washer with several, preferably three, segment-shaped locking elements is inserted in a circumferential groove on the inner circumference of the starter pinion.
  • the backstop lock can be configured to stop the starter pinion when toe-in.
  • the output shaft with an axial distance to the locking shoulder should be a circumferential stop shoulder facing the locking shoulder
  • the solution according to the invention can also be implemented in so-called free-ejecting starters, in which the starter pinion is arranged at the front on a pinion shaft, which in turn is mounted in the driving sleeve or the like. It is proposed here to advantageously arrange the jerk barrier between a drive sleeve connected to the output shaft and the freely ejecting starter pinion which is axially displaceably mounted therein by means of a pinion shaft.
  • the retraction lock can be designed redundantly by being advantageously used as a segmented spring ring with several locking elements in a circumferential groove on the inner circumference of the driving sleeve, the locking elements pressing radially against the surface of the pinion shaft with the locking force of the spring ring, and the pinion shaft has a circumferential locking shoulder, behind which the locking elements can snap in when the starter pinion is engaged.
  • the pinion shaft is in engagement with the driving sleeve via a steep thread.
  • the jerk lock can be arranged between the pinion and high-helix thread or axially behind the high-helix thread.
  • the steep thread is arranged between the starter pinion and the backstop lock.
  • the reverse track lock at the rear end of the driving sleeve, which is axially displaceably mounted on the output shaft via a steep thread, with at least one locking element of the reverse track lock behind the toe-in of the starter pinion a circumferential locking shoulder of the output shaft can snap into place.
  • the locking shoulder is expediently formed on an annular groove located in the area of the high-helix thread on the output shaft.
  • a circumferential abutment shoulder for the locking element of the return lock in the idle state of the starting device can be formed there expediently on the output shaft behind the steep thread.
  • the track lock on a disk body fastened to the rear end of the driving sleeve, in which at least one locking element is guided in a recess in the disk body in the radial direction and is pressed against the output shaft by a prestressed spring.
  • the prestressed spring is expediently inserted in the recess of the disk body between the blocking element and a support shoulder on the outer circumference of the disk body. Since the locking element in
  • Disk body can be formed with a relatively large mass, two juxtaposed biased springs are arranged in the open to the rear end of the disk body to achieve a sufficient locking force, which the Press the locking element against the output shaft.
  • two juxtaposed biased springs are arranged in the open to the rear end of the disk body to achieve a sufficient locking force, which the Press the locking element against the output shaft.
  • three locking elements in three recesses arranged uniformly distributed on the circumference of the disk body.
  • Recesses with the locking elements and springs used are covered by a protective cap that surrounds the disk body.
  • FIG. 1 shows a starting device with an inventive device
  • Figure 2 shows the front part of the starting device
  • FIG. 4 shows the in another embodiment
  • FIG. 5 shows a further exemplary embodiment with a redundant backstop lock consisting of a segmented spring ring and
  • Figure 6 shows the segmented spring ring with its
  • Locking elements a) in front view and b) in side view.
  • Figure 7 shows a fourth embodiment of the
  • FIG. 8 shows a variant of FIG. 7 as the fifth exemplary embodiment.
  • FIG. 9 shows, as a further exemplary embodiment, a triple track lock at the end of a driving sleeve of a freely ejecting starter pinion, a) in the idle state and b) in the locked state,
  • FIG. 10 shows the triple track lock in a spatial, enlarged representation without a protective cap.
  • FIG. 1 shows a screw drive starter 10 with its essential components in cross section as the starting device of the internal combustion engine. It consists of a starter motor 11, a countershaft 12 driven by the starter motor in the form of a known one
  • Planetary gear a freewheel 13 lying in series therewith and an output shaft 15 formed integrally with the inner ring 14 of the freewheel.
  • a driving sleeve 16 is axially displaceably mounted on the output shaft 15 and has a starter pinion 17 at the front.
  • the output shaft 15 has a steep thread 18 which engages with driving teeth 19 on the inside of the driving sleeve 16.
  • the output shaft 15 has at the front a stop ring 20 for the starter pinion 17, against which a return spring 28 is supported, which presses the driving sleeve 16 with the starter pinion 17 into the rest position shown.
  • the output shaft 15 is mounted on the starter housing 24 and on the gear housing 25 via bearings 22 and 23.
  • the starter pinion 17 is axially displaceably supported by a bearing 26 on a front region of the output shaft.
  • To start the internal combustion engine (not shown), it is provided with a ring gear 27 with which the starter pinion 17 meshes during cranking. In the idle state of the starter device according to FIG.
  • the starter pinion 17 is in its disengagement division relative to the ring gear 27.
  • a return lock 28 which essentially consists of a locking element 29 and a coil spring 30, which are inserted one behind the other in a radial bore 31 lying axially behind the teeth of the starter pinion 17.
  • the helical spring 30 is biased against a closure cap 32 at the outer end of the radial bore 31 and, with the locking force, presses the locking element 29 radially against the surface of the output shaft 15.
  • a circumferential, sloping locking shoulder 33 Further forward on the output shaft 15 is a circumferential, sloping locking shoulder 33, behind which according to Figure 2 locks the locking element 29 in the engaged position of the starter pinion 17 with the locking force of the biased coil spring 30.
  • the starter motor 11 can therefore now crank the internal combustion engine with its full force acting on the ring gear 27 until the machine runs itself.
  • the response speed for unlocking the track lock 28 is selected such that it is achieved at least with the lowest self-running speed of the internal combustion engine, translated to the pinion speed.
  • the response speed is 600 min -1 below the idle speed of the internal combustion engine. This overtakes with the self-running of the internal combustion engine
  • Starter pinion 17, the starter motor 11 and the freewheel 13 is thereby opened.
  • the starter pinion 17 is driven by the ring gear 27, only the frictional forces occurring up to the freewheel 13 being effective.
  • the biased return spring 21 can therefore after unlocking of the locking element 29 on the locking shoulder 33 according to FIG. 3 press the starter pinion back into the starting position.
  • starter motor 11 is switched off, output shaft 15, starter pinion 17 and driving sleeve 19 remain.
  • the centrifugal force F on the blocking element 29 becomes zero and the blocking element 29 now presses again on the peripheral section 34 of the output shaft 15 according to FIG. 1 with the force of the helical spring 30.
  • FIG. 4 shows an enlarged representation of the front end of a somewhat modified output shaft 15a of a starting device according to FIG. 1, the same parts being provided with the same reference numbers.
  • Starter pinion 17 and driving sleeve 16 are shown here in their single-track division, the locking element 29 being latched onto the locking shoulder 33.
  • the stop ring 20 is only required to support the return spring 21.
  • the output shaft 15 has an all-round, rising stop shoulder 35 at an axial distance from the locking shoulder 33, against which the locking element 29 bears in the illustrated locking position of the snap lock 28 when the starter pinion 17 is further toe-in.
  • FIGS. 5 and 6 show a further exemplary embodiment of a track lock with centrifugal force-controlled unlocking, the locking elements being designed redundantly.
  • the same reference numbers are used for the same parts of the starting device.
  • the jerk barrier 28a is here with several of the same
  • Locking elements 29a are distributed along the inner circumference of the starter pinion 17 together with the driving sleeve.
  • the jerk lock 28a here essentially consists of a segmented spring ring 40 with three segment-shaped locking elements 29a distributed uniformly on the circumference, which in one circumferential groove 41 are used on the inner circumference of the pinion driver unit.
  • the locking elements 29a have on their rear side a trough 42 running in the circumferential direction, into which the spring ring 40 in the form of a spring wire spirally wound according to FIGS. 6a and 6b is inserted under pretension. In the unlatched position of the starter pinion 17 according to the upper half of FIG.
  • the locking elements 29a are pressed by the prestressed spring ring 40 onto the surface section 34 of the output shaft 15. As soon as the starter pinion 17 is axially preloaded at the start of a starting process, the locking elements 29a also slide axially forward over the surface area of the output shaft 15 and finally engage behind the locking shoulder 33 of the output shaft 15 in the engaged position of the pinion according to the lower half of FIG , With a
  • the spring ring 40 and the mass of the locking elements 29a are in turn coordinated with one another in such a way that when the idling speed of the internal combustion engine is reached, the centrifugal force F on the locking elements 29a becomes so great that they push the locking elements 29a radially outward against the spring force of the spring ring 40 to the extent that they unlock the return lock 28a on the locking shoulder 23 and thus release the starter pinion 17 for backtracking through the tensioned return spring 21.
  • FIG. 7 as a further exemplary embodiment, the front part of a freely ejecting thrust drive starter is shown in cross section, here also with regard to FIG Previous exemplary embodiments are provided with the same parts with the same reference numbers.
  • the inner ring 14 of the freewheel is not formed in one piece with an output shaft, but with the driving sleeve 16a.
  • the starter pinion 17a sits at the front on a pinion shaft 50, which is mounted axially displaceably in the driving sleeve 16a at the front on the bearing 22 and at the rear end via a bearing 51. In the front area of the pinion shaft 50, this acts for toe-in via a steep thread 18a with the driving teeth 19a
  • the return lock 28a which acts here between the driving sleeve l ⁇ a and the pinion shaft 50.
  • the embodiment of the backstop block 28a corresponds to the solution shown in FIGS. 5 and 6. It is used as a segmented spring ring 40 with three locking elements 29a in the circumferential groove 41 on the inner circumference of the driving sleeve 16a, the locking elements 29a now pressing radially against the surface 34a of the pinion shaft 50 with the locking force of the spring ring 40 in the idle state.
  • Surface area 34a is located on the pinion shaft 50 a circumferential, falling locking shoulder 33a, behind which the locking elements 29a in the ejection position or engagement position of the starter pinion 17a with the
  • FIG. 8 shows an alternative solution for the arrangement of the track lock 28a on the ejecting starter. While the steep thread 18a is arranged between the starter pinion 17a and the reverse lock 28a in FIG. 7, FIG. 8 shows a solution in which the reverse lock 28a is arranged between the starter pinion 17b and the steep thread 18a. In this solution, high-helix thread 18 and backstop lock 28a are arranged between two bearing points 51, 52 of the pinion shaft 50 on the driving sleeve 16a.
  • Figure 8 shows the rest position in the upper part and the ejection position of the pinion and pinion shaft in the lower part.
  • the driver sleeve 16b here carries the starter pinion 17b at the front end, which is rotatably inserted in the driver sleeve and is mounted on the front end of the output shaft 15b.
  • the driver sleeve 16b is also a
  • Return spring 21b is used, which is supported against a support shoulder 60 of the driving sleeve 16b and a stop ring 20b fastened on the output shaft 15b.
  • the backstop block 28b is arranged at the rear end of the driver sleeve 16b. It consists of one at the rear end of the Driver sleeve 16b fastened disk body 61 which, according to FIG. 10, has three evenly distributed cutouts 62 on its circumference, which are open toward the rear end face of disk body 61.
  • a locking element 29b is guided in the radial direction in each of the cutouts 62. The locking elements 29b are pressed by spring force in the radial direction against the outer circumference of the output shaft 15b.
  • two prestressed coil springs 30b are provided, which are arranged next to one another in the respective recess 62 between the locking element 29b and a support shoulder 63 on the outer circumference of the disk body 61.
  • the cutouts 62 with the inserted locking elements 29b and the coil springs 30b are covered by a protective cap 64 which surrounds the disk body 61 of the retraction lock 28b.
  • Locking elements 29b rest against a circumferential contact shoulder 65 behind the steep thread 18b of the output shaft 15b.
  • the retraction lock 28b is pre-engaged via the steep thread 18b.
  • the locking elements 29b are pressed radially outwards against the force of the helical springs 30b via a ramp 66 (see FIG. 9b) at the rear end of the steep thread 18b and slide forward with the steep thread 18a.
  • the blocking elements 29b reach an annular groove 67 in the area of the high-helix thread 18b on the output shaft 15b.
  • Lockout block 28b locked in this position. Only when the internal combustion engine has started up due to a correspondingly high speed of rotation, the centrifugal forces of the locking elements 29b become greater than the pretensioning forces of the coil springs 30b, are the locking elements 29b moved radially outward so that their locking on the annular groove 67 is released. Now the driving sleeve 16b with the starter pinion 17b can be moved back into the starting position by the force of the return spring 21b. When the starter motor is switched off, that is now
  • the invention is not limited to the illustrated embodiments of a backstop lock on starting devices. Rather, it encompasses all solutions which preferably lock themselves automatically after the starter pinion has reached the engaged position and in which an automatic, centrifugal force-controlled unlocking then occurs due to the pinion rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L"invention concerne un dispositif de démarrage destiné à lancer un moteur à combustion interne au moyen d"un moteur de démarreur (11) et d"un arbre de sortie (15) coopérant avec un pignon du démarreur (17) monté coulissant axialement, ledit pignon venant en prise, au début de chaque démarrage, avec une couronne dentée (27) du moteur à combustion interne jusqu"à venir en contact avec une butée (20), et étant maintenu en sa position de prise par un élément de rappel de maintien en prise commandé (28). L"invention a pour but de supprimer l"actionneur et ses moyens de commande, nécessaires jusqu"à présent, pour le verrouillage et le déverrouillage de l"élément de rappel de maintien en prise (28). A cet effet, l"invention est caractérisée en ce que l"élément de rappel de maintien en prise (28) présente un système de déverrouillage à commande par force centrifuge (29, 30, 31).
EP01988822A 2000-10-25 2001-10-25 Dispositif de demarrage pour moteurs a combustion interne Withdrawn EP1332286A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10052796 2000-10-25
DE10052796 2000-10-25
DE10150714 2001-10-13
DE10150714A DE10150714A1 (de) 2000-10-25 2001-10-13 Startvorrichtung für Brennkraftmaschinen
PCT/DE2001/004001 WO2002035088A1 (fr) 2000-10-25 2001-10-25 Dispositif de demarrage pour moteurs a combustion interne

Publications (1)

Publication Number Publication Date
EP1332286A1 true EP1332286A1 (fr) 2003-08-06

Family

ID=26007486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01988822A Withdrawn EP1332286A1 (fr) 2000-10-25 2001-10-25 Dispositif de demarrage pour moteurs a combustion interne

Country Status (4)

Country Link
EP (1) EP1332286A1 (fr)
AU (1) AU2002218144A1 (fr)
DE (1) DE10194706D2 (fr)
WO (1) WO2002035088A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005048599A1 (de) * 2005-10-06 2007-04-12 Robert Bosch Gmbh Startvorrichtung zum Andrehen von Brennkraftmaschinen
DE102005048598B4 (de) 2005-10-06 2016-06-30 Robert Bosch Gmbh Startvorrichtung zum Andrehen von Brennkraftmaschinen
DE102009057263A1 (de) 2009-12-08 2011-06-09 Hofer Eds Gmbh Start-Stopp-System, insbesondere für ein Kraftfahrzeug mit Verbrennungskraftmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1527588A (en) * 1915-05-13 1925-02-24 Eclipse Machine Co Gearing for starting internal-combustion engines
FR774405A (fr) * 1934-06-09 1934-12-06 Ducellier Perfectionnement aux dispositifs d'entraînement à embrayage et débrayage automatiques pour moteurs
DE2439981A1 (de) 1974-08-21 1976-03-04 Bosch Gmbh Robert Andrehvorrichtung fuer brennkraftmaschinen
US4395923A (en) * 1979-10-15 1983-08-02 Facet Enterprises, Inc. Engine starter gearing
US4524629A (en) * 1982-08-18 1985-06-25 Facet Enterprises, Inc. Compact engine starter drive
EP0725216B2 (fr) 1994-09-19 2004-09-01 Denso Corporation Démarreur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0235088A1 *

Also Published As

Publication number Publication date
WO2002035088A1 (fr) 2002-05-02
DE10194706D2 (de) 2003-10-02
AU2002218144A1 (en) 2002-05-06

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