EP1258631A2 - Brennkraftmaschinenstartermotor und Verfahren - Google Patents

Brennkraftmaschinenstartermotor und Verfahren Download PDF

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Publication number
EP1258631A2
EP1258631A2 EP02010941A EP02010941A EP1258631A2 EP 1258631 A2 EP1258631 A2 EP 1258631A2 EP 02010941 A EP02010941 A EP 02010941A EP 02010941 A EP02010941 A EP 02010941A EP 1258631 A2 EP1258631 A2 EP 1258631A2
Authority
EP
European Patent Office
Prior art keywords
engine
electrical motor
shaft
output shaft
arrangement
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Withdrawn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
EP02010941A
Other languages
English (en)
French (fr)
Other versions
EP1258631A3 (de
Inventor
Yoshikazu Kurita
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.)
Yamaha Motor Electronics Co Ltd
Original Assignee
Moric Co Ltd
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 JP2001147860A external-priority patent/JP2002339844A/ja
Application filed by Moric Co Ltd filed Critical Moric Co Ltd
Publication of EP1258631A2 publication Critical patent/EP1258631A2/de
Publication of EP1258631A3 publication Critical patent/EP1258631A3/de
Withdrawn legal-status Critical Current

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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
    • F02N15/003—Starters comprising a brake mechanism
    • 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
    • F02N11/00—Starting of engines by means of electric motors

Definitions

  • This invention relates to a starter motor for an engine for a vehicle such as a motorcycle or the like and to a method for starting such engines and reducing starter noise at the time of the starting operation.
  • a starter motor is used at the time of engine starting to rotate an engine shaft under battery power.
  • the starter motor is generally a DC motor driven through a relay by operation of a manual switch such as main switch or a starter switch of the vehicle.
  • the switch is first turned ON to rotate the starter motor, for cranking.
  • the starter motor load drops to zero, resulting in a maximum rotational speed.
  • the switch is turned OFF to stop the power supply to the starter motor.
  • the starter motor output shaft is disconnected from the engine shaft by a one way clutch type of device and it rotates idly by its inertia and stops after gradually reducing its rotational speed.
  • the power source of the starter motor is turned ON at a time t0 and begins to rotate for cranking.
  • the starter motor load drops to zero and the rotational speed increases to a maximum.
  • the starter switch is turned OFF by hand.
  • the starter motor rotates idly as a result of its inertia, decreasing its rotational speed gradually and stopping eventually at a time t2.
  • an abnormally high noise is generated.
  • the noise at this point is an abnormal and unpleasant one and unusually is louder than the engine noise or even that of the starter motor during the actual starting operation.
  • This abnormal noise is caused by the starter motor yoke of its stator resonating when the natural frequency of the yoke coincides with the number of times of cogging reaction at a specific motor speed.
  • This resonance frequency corresponds to a frequency determined by the least common multiple of the number of slots of an armature and the number of magnetic poles of magnets, or the cogging number/rotation, and the cogging reaction produced at a specific motor speed.
  • the cogging number is the least common multiple of 28 for a motor with fourteen slots and four-pole magnets.
  • an armature connected to the output shaft of the starter motor is formed of a plurality of radially disposed cores. Electrical coils are wound on these cores and face a plurality of magnets on the inside surface of the starter motor yoke. The armature is rotated through successive attractions of magnetic forces of the magnets.
  • the material of the permanent magnets is a ferrite-based magnetic material.
  • neodymium-based magnets made from a magnetic material containing Nd of a rare metal element or its compound known as high-energy magnets are preferred because they permit a higher output starter motor for a given size. If such neodymium-based magnets are used, since the magnetic forces are great, the problem of an abnormal noise due to the cogging reaction is amplified.
  • a first feature of this invention is adapted to be embodied in a starter arrangement for an internal combustion engine.
  • the starter arrangement comprises a DC electrical motor having an output shaft in starting arrangement with a shaft of the engine for starting the engine.
  • a battery is provided for selectively energizing terminals of the DC electrical motor for driving the engine shaft to start the engine.
  • a braking arrangement brakes the rotation of the starter motor output shaft when the engine starts.
  • the braking arrangement comprises a switching arrangement that connects the terminals of the DC electrical motor to the battery to charge the battery upon the deenergization of the terminals for stopping the driving of the DC electrical motor by regeneratively braking the rotation of said DC electrical motor.
  • a DC electrical motor has an output shaft in starting arrangement with a shaft of the engine for starting the engine.
  • a battery is also provided. The method comprises the steps of selectively energizing terminals of the DC electrical motor for driving the engine shaft to start the engine upon operator demand and the rotation of the starter motor output shaft is braked when the engine starts.
  • the starter motor output shaft is braked by connecting the terminals of the DC electrical motor to the battery to charge the battery upon starting of the engine to regeneratively brake the rotation of the DC electrical motor.
  • FIG. 1 is a graphical view showing the noise and speed of a prior art type of starter motor during engine starting operation.
  • FIG. 2 is a cross sectional view of a starter motor constructed and operated in accordance with the invention.
  • FIG. 3 is a cross sectional view taken along the line 3-3 in FIG. 2.
  • FIG. 4 is a cross sectional view taken along the line 4-4 in FIG. 2.
  • FIG. 5 is a circuit diagram of the starter motor.
  • a starter motor for an internal combustion engine (not shown) is indicated generally by the reference numeral 11.
  • the starter motor 11 is comprised of a stator 12 formed of a cylindrical yoke 13 and four permanent magnets 14, of arc-shaped cross section, bonded on the inside surface of the yoke.
  • the permanent magnets 14 are preferably formed from a neodymium (Nd)-based magnetic material that is magnetized after being bonded to the yoke 13.
  • the armature 15 is comprised of a core 16 facing the magnets 14 and fixed to a starter motor output shaft 17.
  • a commutator 18 is fixed adjacent to the core 16 on one end of the starter motor output shaft 17.
  • the core 16 as shown in FIGS. 2 and 3, is formed of a plurality of radially disposed core teeth 19. In the illustrated embodiment there are 14 core teeth 19. Electrical coils (not shown) are wound around the core pieces 19.
  • the commutator 18 is formed of a plurality of contact pieces 21 corresponding in number to the core pieces 19 and that are electrically connected to the coil ends, as is well known in the art.
  • Two sets of two brushes22 and 23 (FIG. 4) held by respective brush holders 24 and 25 are juxtaposed to the commutator 18 at its outside circumference. The brushes 22 and 23 are pressed against the contact pieces 21 of the commutator 18 by coil springs 26.
  • a front cover 27 (FIG. 2) covering the left side of the yoke 13 as seen in the figure and a rear cover 28 covering the right side of the yoke. on the figure, collectively forming, with the yoke 13, a motor case indicated generally by the reference numeral 29.
  • the starter motor output shaft 17 is journalled for rotation on the front cover 27 and the rear cover 28, respectively by bearings 31.
  • a positive terminal 32 for power supply from the positive electrode of a battery (described later by reference to FIG. 5 mounted on the vehicle.
  • the positive terminal 32 is suitably connected to the brushes 22 on the positive electrode side.
  • the brushes 23 on the negative electrode side are connected to the end closure 28 by grounding fasteners 33.
  • the motor case 29 is grounded to the associated engine by a mounting bracket 34 that fixes the starter motor 11 to the engine thus acting as a negative terminal.
  • an oil seal 35 (FIG. 2) for preventing ingress of oil into the motor case 29 from the associated engine, and an O-ring 36 for sealing the mounting portion to the engine.
  • a pinion gear 37 meshing with an flywheel gear (not shown) to rotate the engine shaft for starting.
  • Some form of one way device such as a one way clutch is provided in this connection to permit the engine shaft from driving the starter motor once the engine has started to run under its own power, as is well known in this art.
  • a disk-like brush carrier38 Inside the rear cover 28 covering the commutator 18 at the end of the starter motor output shaft 17 is fixed a disk-like brush carrier38.
  • the brush holders 24 and 25 are affixed to the brush carrier38 at four positions spaced radially at right angles to hold the opposing two positive electrode brushes 22 and opposing two negative electrode (grounding) brushes 23.
  • the brushes 22, 23 are biased radially inwardly toward the commutator 18 by the coil springs 26.
  • the positive electrode brushes 22 are connected to the positive terminal 32, and the negative electrode brushes 23 to the negative (grounding) terminal 34.
  • FIG. 5 is a diagram of a circuit for driving the starter motor 11.
  • the starter motor 11 is connected to the aforementioned battery 39 through a relay 41. Power supply from the battery 39 to the motor is switched ON/OFF through operation of a main or starter switch 42.
  • the relay 41 is comprised of a solenoid winding 43.
  • the winding 43 encircles an armature that carries a contact plate 44.
  • the relay 41 further comprises first and second contacts 45, 46 with which the contact plate 44 comes in contact.
  • the switch 42 is opened. Then, the solenoid 43 is disconnected from the battery 39, and the contact plate 44 is returned to the left on the figure by a spring (not shown) and comes in contact with the second contact 46 to close it (the state shown in FIG. 5).
  • An improved DC electrical starting motor and method for starting internal combustion engines that reduces starter motor noise in the period after the engine starts by effecting breaking of the starter motor shaft at that time.
  • the braking is accomplished by regenerative braking.

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)
EP02010941A 2001-05-17 2002-05-16 Brennkraftmaschinenstartermotor und Verfahren Withdrawn EP1258631A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001147860 2001-05-17
JP2001147860A JP2002339844A (ja) 2001-05-17 2001-05-17 回生ブレーキを使ったエンジンのスタータ
US10/063,641 US6679213B2 (en) 2001-05-17 2002-05-07 Starter arrangement and method for an engine
US63641 2002-05-07

Publications (2)

Publication Number Publication Date
EP1258631A2 true EP1258631A2 (de) 2002-11-20
EP1258631A3 EP1258631A3 (de) 2004-07-28

Family

ID=26615262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02010941A Withdrawn EP1258631A3 (de) 2001-05-17 2002-05-16 Brennkraftmaschinenstartermotor und Verfahren

Country Status (2)

Country Link
EP (1) EP1258631A3 (de)
CN (1) CN1397731A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907174A1 (fr) * 2006-10-11 2008-04-18 Denso Corp Dispositif de demarrage de moteur a combustion interne ayant un bruit reduit
FR2908160A1 (fr) * 2006-11-06 2008-05-09 Valeo Equip Electr Moteur Dispositif de demarrage pour moteur a combustion, notamment de vehicule automobile
WO2008056075A2 (fr) * 2006-11-06 2008-05-15 Valeo Equipements Electriques Moteur Dispositif de demarrage pour moteur a combustiion, notamment de vehicule automobile
RU2657470C1 (ru) * 2017-07-10 2018-06-14 Александр Петрович Носов Схема включения стартера двигателя внутреннего сгорания

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB583881A (en) * 1944-06-23 1947-01-01 Bendix Aviat Corp Engine starter
GB1427430A (en) * 1973-03-28 1976-03-10 Edwards A K Vehicle transmissions
US4308462A (en) * 1980-01-17 1981-12-29 Ambac Industries, Incorporated Engine starter system with improved structure for maintaining engine engagement
US4738148A (en) * 1984-12-12 1988-04-19 Peter Norton Starter drive
US5130560A (en) * 1989-09-09 1992-07-14 Mitsubishi Denki K. K. Engine starter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB583881A (en) * 1944-06-23 1947-01-01 Bendix Aviat Corp Engine starter
GB1427430A (en) * 1973-03-28 1976-03-10 Edwards A K Vehicle transmissions
US4308462A (en) * 1980-01-17 1981-12-29 Ambac Industries, Incorporated Engine starter system with improved structure for maintaining engine engagement
US4738148A (en) * 1984-12-12 1988-04-19 Peter Norton Starter drive
US5130560A (en) * 1989-09-09 1992-07-14 Mitsubishi Denki K. K. Engine starter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907174A1 (fr) * 2006-10-11 2008-04-18 Denso Corp Dispositif de demarrage de moteur a combustion interne ayant un bruit reduit
FR2908160A1 (fr) * 2006-11-06 2008-05-09 Valeo Equip Electr Moteur Dispositif de demarrage pour moteur a combustion, notamment de vehicule automobile
WO2008056075A2 (fr) * 2006-11-06 2008-05-15 Valeo Equipements Electriques Moteur Dispositif de demarrage pour moteur a combustiion, notamment de vehicule automobile
WO2008056075A3 (fr) * 2006-11-06 2008-11-27 Valeo Equip Electr Moteur Dispositif de demarrage pour moteur a combustiion, notamment de vehicule automobile
RU2657470C1 (ru) * 2017-07-10 2018-06-14 Александр Петрович Носов Схема включения стартера двигателя внутреннего сгорания

Also Published As

Publication number Publication date
CN1397731A (zh) 2003-02-19
EP1258631A3 (de) 2004-07-28

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