EP3325798A1 - Lanceur de demarreur de vehicule automobile - Google Patents
Lanceur de demarreur de vehicule automobileInfo
- Publication number
- EP3325798A1 EP3325798A1 EP16750980.1A EP16750980A EP3325798A1 EP 3325798 A1 EP3325798 A1 EP 3325798A1 EP 16750980 A EP16750980 A EP 16750980A EP 3325798 A1 EP3325798 A1 EP 3325798A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pinion
- elastic member
- launcher
- gear
- shoulder
- 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.)
- Granted
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
- F02N15/063—Starter drives with resilient shock absorbers
-
- 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
- F02N11/00—Starting of engines by means of electric motors
-
- 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
Definitions
- a starter comprises a launcher on which is mounted a pinion for meshing with a ring of a heat engine, an electric motor for driving the pinion in rotation and a switch for moving in axial translation the launcher via a fork to allow the pinion to move towards the crown.
- One of the major problems of the starters is to ensure a good gear of the pinion with the crown. Indeed, depending on the state of the engine, the movement of the crown differs, which increases the risk of a longer gear or incomplete. Indeed, in the case of a cold start, the crown is stationary during the gearing but in the case of a hot start (common case with "stop and start” mechanisms that stop the engine thermal when the vehicle is stopped, especially because of traffic conditions (traffic jams, traffic lights Certainly), the crown can still be rotated during the gearing. In addition, in the case of hot starts, the crown can rotate in the direction of rotation of the pinion but can also turn in the opposite direction during the swing phase preceding the stop of the crown, which makes it even more difficult. sprocket gear with the crown. If the torque is transmitted to the pinion by the electric motor before the gearing of the pinion with the crown, this can lead to premature wear of the pinion and / or the crown and a larger noise, especially during startup phases. hot.
- the present invention relates to a launcher for a motor vehicle starter comprising:
- a socket comprising a shoulder and a stop element, a pinion slidably mounted on the bushing between the stop element and the shoulder,
- At least one resilient member mounted between the pinion and the shoulder and being adapted to have a rest position in which the pinion bears on the stop element and a compressed position in which the pinion is moved away from said pinion element; stopping, in which the elastic member is mounted, in its rest position, so that the pinion is prestressed with a load of between 40 N and 80 N.
- the elastic member is mounted, in its rest position, so that the pinion is prestressed with a load of between 55 N and 65 N.
- the pinion has a mass of between 40 g and 110 g, in particular of the order of 60 g, and wherein the launcher has a mass of between 250 g and 420 g, in particular 320 g.
- the pinion has a stroke between the stop element and the shoulder between 2 mm and 6 mm, in particular equal to 4 mm. Indeed, a stroke of less than 2 mm does not allow optimal use of the elastic member which does not provide sufficient acceleration to the pinion. In addition, a stroke greater than 6 mm would increase the axial size of the machine without improving the utility of the elastic member.
- the fact that the pinion has a stroke in this range combined with the fact that the latter also has a certain level of prestressing provides the pinion acceleration then allowing it to improve the gear of the pinion with the crown.
- the elastic member has a stiffness of between 2000 N / m and 10000 N / m.
- the elastic member is a spring, in particular a helical spring.
- the spring has a number of turns between two and four.
- the pinion is movably mounted between a front position in which the pinion is in contact with a stop member and a rear position in which the pinion is in abutment against a stop and compresses the member. elastic against the shoulder.
- the present invention also relates to a motor vehicle starter comprising a launcher as described above.
- the elastic member is arranged so that, when the elastic member is in the compressed position, the pinion is at a distance of at least 2 mm from the stop element and is remote of the shoulder.
- the starter comprises at least one tooth-tooth spring disposed at a contactor and adapted to exert an axial force on the pinion via a fork and in which the force exerted by the elastic member. on the pinion, in its rest position, is greater than the force exerted by said toothed spring on said pinion.
- FIG. 1 shows, schematically and partially, a longitudinal sectional view of a starter according to one embodiment of the present invention
- FIG. 2 shows, schematically and partially, a longitudinal sectional view of a starter of a starter according to one embodiment of the present invention
- FIG. 3 shows, schematically and partially, the starter of Figure 1 in a first position
- FIG. 4 shows, schematically and partially, the starter of Figure 1 in a second position
- FIG. 5 represents, schematically and partially, the starter of FIG. a third position
- FIG. 6 shows, schematically and partially, the starter of Figure 1 in a fourth position
- FIG. 7 shows, schematically and partially, the starter of Figure 1 in a fifth position
- FIG. 8 shows a graph of the efficiency of the gear between the pinion and the ring depending on the prestressing level of the pinion for different stiffness of the elastic member.
- FIG. 1 represents a diagram of a starter 1.
- the starter 1 comprises a launcher 3, an electric motor 7 intended to drive the launcher 3 in rotation, a contactor 13 intended to drive the launcher 3 in translation through a fork 21.
- the electric motor 7 comprises a cylinder head 9, a rotor and a stator.
- the contactor 13 comprises at least one coil 15 allowing, when energized, to move a mobile part of a magnetic core or mobile core 17 in translation towards a fixed part 16 of the magnetic core inside an air gap 19
- a coil 15 which can therefore include several coils.
- the contactor 13 also comprises a rod 18 movable in translation relative to the movable core 17 of the contactor 13.
- a spring said tooth-tooth spring 20 is positioned at the interface between the movable core 17 and the rod 18.
- the rod 18 is therefore movable relative to the movable core between a first position in which the tooth-tooth spring 20 is expanded and a second position in which the tooth-tooth spring 20 is compressed.
- the toothed spring 20 has for example a stiffness of about 11 N / mm and a rest length of about 22 mm and is mounted with a preload of about 45 N.
- the contactor 13 may also comprise of other springs configured to return the movable core 17 to the initial position, that is to say at a distance from the fixed part 16 when the coil 15 is no longer powered.
- the rod 18 is attached to a first end of the fork 21.
- the connection between the rod 18 and the fork 21 can be done by any suitable means for transmitting the force or the torque between the fork 21 and the rod 18 as for example a pivot connection made by a screw-nut assembly.
- the fork 21 is configured to tilt about an axis of rotation located at its central portion.
- the fork 21 also comprises a second end, opposite its first end relative to the central part, intended to come into contact with the launcher 3 to allow axial displacement of the launcher 3 when the coil 15 of the contactor is energized.
- the lever arm of the fork 21 has for example a ratio of a distance between the first end and the axis of rotation on the distance between the second end and the axis of rotation equal to 1.5.
- the stroke of the launcher 3 is thus equal to about 1.5 times the stroke of the rod 18 of the contactor 13.
- the launcher 3 is rotated by the electric motor 7 located at the rear of the launcher 3.
- the rotational drive of the launcher 3 is, here, achieved via a reducing ring 11 disposed at the front end of the cylinder head 9.
- the launcher 3 is mobile in rotation and in translation.
- the rotational drive is performed by the electric motor 7 and the drive in translation is carried out by the switch 13 via the fork 21.
- the launcher 3 is shown in more detail in FIG. 2.
- the launcher 3 comprises a bushing 23 mounted to rotate and translate axially on a shaft 25 via bearings 27, for example needle bearings.
- the shaft 25 extends along an axis X.
- the launcher 3 also comprises a pinion 5 slidably mounted on the front portion of the bush 23.
- the pinion 5 is intended to engage a ring gear 6 of a heat engine, called a ring gear 6.
- the front part of the bushing 23 is therefore the part situated on the side of the driving ring 6 and the rear part of the bushing 23 is the part of the bushing 23 situated on the side of the electric motor 7.
- the bushing 23 comprises a stop element 33 disposed in front of the pinion 5 and a shoulder 29 disposed behind the pinion 5.
- the stop element 33 is for example a circlip disposed in a groove of the bushing 23.
- An elastic member 31 for example a helical spring or an elastomer, is disposed around the axis of the bushing 23 and bears against the shoulder 29 of the bush 23 and against the pinion 5.
- the pinion 5 is constrained by the elastic member 31 against said stop element 33.
- the elastic member 31 allows, in compression, a translational movement of the sleeve 23 when the pinion 5 is in the tooth against tooth position with the motor ring 6, that is to say when the teeth of the pinion 5 are in position. contact with the teeth of the motor ring 6 without there being gearing between the two.
- the shoulder 29 comprises, for example, an axial protrusion such as a stop 37 against which the pinion 5 abuts.
- the stop 37 makes it possible to avoid excessive compression of the elastic member 31 that can degrade it.
- the stop 37 is for example made by one or more pads or by a circular element.
- the stop 37 extends axially from a front face of the shoulder 29.
- the stop 37 extends, for example, between the elastic member 31 and the sleeve 23.
- the pinion 5 is movable between a forward position in which it rests against the stop element 33 and a rear position in which it comes into contact with the stop 37.
- the distance between the front position and the rear position of the pinion 5 defines the race of the pinion 5 with respect to the sleeve 23.
- the numerical simulations have made it possible to define that the optimum race of the pinion 5 is between 2mm and 6mm, in particular 4mm.
- the sleeve is itself movable in axial translation relative to the shaft 25 between a position disengaged with the motor ring 6 and a position meshing with said ring. In the engaged position, the bushing 23 bears on a stop 38 disposed on a front part of the shaft 25.
- the numerical simulations make it possible to identify and determine the value of the influencing parameters making it possible to optimize the gearing of the pinion 5 with the driving ring gear 6 and thus to determine the optimum characteristics of the elastic member 31. For this reason, criteria for optimizing the pinion gear 5 on the motor ring gear 6 are defined. These criteria include, for example, the engagement time of the pinion 5 on the driving ring 6. In addition, the result of the numerical simulations depends on the characteristics of the launcher 3, in particular the weight of the launcher 3 or the size of the pinion 5. However, for to reduce the production costs, the same elastic member 31 can be used for several types of launcher 3 so that an average can be performed on the characteristics of different launchers 3 to obtain the characteristics of the elastic member 31 allowing a quasi gear -optimal for different launchers.
- the elastic member 31 is configured so that the prestressing exerted on the pinion 5 in the rest position against the stop element 33 is between 40 N and 80 N and preferably between 55 N and 65 N.
- the pinion 5 has, here, a mass of between 40 g and 110 g, in particular of the order of 60 g
- the launcher 3 (comprising the pinion 5) has a mass of between 250 g and 420 g, in particular of the order of 320 g.
- the values of stiffness and prestressing of the elastic member 31 can therefore be adapted as a function of the mass of the launcher 3.
- the number of turns of the elastic member 31 is for example between 2 and 4.
- the elastic member 31 may be formed by several elastic elements as per example several helical springs or more elastomers or a combination of springs and elastomers, the different springs or elastomers may have stiffness and / or lengths and / or different races and be assembled in series or in parallel.
- Figure 3 shows the starting position of the starter 1 stopped.
- the coil 15 of the contactor 13 is energized which causes the moving part or movable core 17 to move towards the fixed part 16 of the magnetic core.
- the displacement of the movable core 17 causes the fork 21 to tilt and the launcher 3 to move forward and thus from the pinion 5 towards the motor ring 6 as shown in FIG. 4.
- the pinion 5 comes into contact with the crown motor 6, two cases may occur.
- the pinion 5 arrives directly in a gear slot of the motor ring 6 and can thus mesh directly with the driving ring 6.
- this first case is relatively rare, particularly in the case of a start. hot since the motor ring 6 is rotating.
- the pinion 5 comes into tooth against tooth contact with the motor ring 6 as shown in FIG. 4.
- the inertia of the launcher 3 then causes the compression of the elastic member. 31 which absorbs this energy.
- the elastic member 31 is compressed (the pinion 5 does not necessarily reach the stop 37), as the movable core 17 continues to move towards the fixed portion 16, the tooth-tooth spring 20 is then compressed as shown in FIG.
- the compressions of the elastic member 31 and the tooth-tooth spring 20 can be done simultaneously. However, the compression of the elastic member 31 is faster than that of the tooth-tooth spring 20.
- the movable core 17 then continues to move, independently of the pinion 5 due to the crushing of the tooth-tooth pinion 20, until it bears against the fixed core 16.
- the fixed core 16 pushes a movable contact which comes into contact with electrical terminals so as to create the conjunction of the contactor 13 in order to supply the electric motor 7.
- the electric motor 7 then causes the launcher 3 to rotate about the axis X.
- gear gap is meant a position of the pinion 5 where its teeth are opposite a space between two successive teeth of the motor ring 6. Indeed, before the electric motor 7 reaches full speed of rotation, the pinion 5 rotates at low speed which allows it to position itself in this gear gap.
- the input of the pinion 5 in the motor ring is therefore quickly by the expansion of the elastic member 31 as shown in Figure 6 and the action of the tooth-tooth spring 20 completes the action of the elastic member 31 and makes it possible to continue to exert a constraint on the pinion 5 when the elastic member 31 arrives in the rest position so as to completely engage the pinion 5 with the driving ring gear 6 as shown in FIG. 7.
- said pinion transmits a large torque to said ring to start the engine.
- an elastic member 31 configured to apply a prestressing between 40 N and 80 N to the pinion 5 improves the gear of the pinion 5 with the driving ring 6.
- the elastic member 31 thus allows Engaging the gear by engaging the teeth of the pinion 5 with the teeth of the motor ring 6 and the tooth-tooth spring 20 allows him to complete this gear.
- the prestressing of the elastic member 31 provides a sufficient force to allow the pinion 5 input quickly gear with the motor ring gear 6 when a gear gap occurs and whatever the movement of the motor ring (when stopped, rotation in one direction or in the opposite direction).
- the present invention thus allows, by a configuration of the elastic member 31 and pinion 5, which does not require additional costs, to obtain a faster and more fluid gear pinion 5 on the motor ring 6, avoiding bounces of the pinion, and thus reduce the wear of the pinion 5 and the motor ring 6 and the noise emitted by the starter 1 at the start.
- the elastic member 31 thus acts in addition to the toothed spring 20 to allow an effective gearing of the pinion 5 with the motor ring gear 6.
- FIG. 8 illustrates the level of efficiency of the gearing on a sample of a pinion and a ring as a function of the prestressing level of the pinion for different values of stiffness of the elastic member.
- Efficiency means a gear, a pinion in a crown, fast and with attenuated noise.
- a pinion of the starters of the prior art generally has a preload with a load of the order of 30 N. It is therefore noted that this preload level of the pinion has an efficiency of the order of 0.5 which is significantly lower than the proposed solution in a starter as previously described with reference to the present invention.
- the starter as previously described, is used in an outgoing starter motor.
- the invention finds applications in particular in the field of thermal motor starters and in particular for motor vehicle engines, but it could also apply to any type of starter.
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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1557043A FR3039222B1 (fr) | 2015-07-24 | 2015-07-24 | Lanceur pour demarreur de vehicule automobile |
| PCT/FR2016/051867 WO2017017348A1 (fr) | 2015-07-24 | 2016-07-20 | Lanceur de demarreur de vehicule automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3325798A1 true EP3325798A1 (fr) | 2018-05-30 |
| EP3325798B1 EP3325798B1 (fr) | 2024-04-24 |
Family
ID=54186162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16750980.1A Active EP3325798B1 (fr) | 2015-07-24 | 2016-07-20 | Lanceur de démarreur de véhicule automobile |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3325798B1 (fr) |
| FR (1) | FR3039222B1 (fr) |
| WO (1) | WO2017017348A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233930A (ja) * | 2005-02-28 | 2006-09-07 | Denso Corp | スタータ |
| EP2385243B1 (fr) * | 2007-07-24 | 2013-11-13 | Denso Corporation | Démarreur pour moteurs et circuit de démarrage |
| JP5251693B2 (ja) * | 2009-04-10 | 2013-07-31 | 株式会社デンソー | スタータ |
| DE102011085279A1 (de) * | 2011-10-27 | 2013-05-02 | Robert Bosch Gmbh | Elektrische Maschine, insbesondere Starter für eine Brennkraftmaschine |
| DE102012210684A1 (de) * | 2012-06-25 | 2014-01-02 | Robert Bosch Gmbh | Andrehvorrichtung und Verfahren zum Betreiben einer Andrehvorrichtung |
-
2015
- 2015-07-24 FR FR1557043A patent/FR3039222B1/fr active Active
-
2016
- 2016-07-20 WO PCT/FR2016/051867 patent/WO2017017348A1/fr not_active Ceased
- 2016-07-20 EP EP16750980.1A patent/EP3325798B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3039222B1 (fr) | 2019-04-05 |
| FR3039222A1 (fr) | 2017-01-27 |
| EP3325798B1 (fr) | 2024-04-24 |
| WO2017017348A1 (fr) | 2017-02-02 |
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