EP4036387B1 - Einheitsschwenkmotor - Google Patents

Einheitsschwenkmotor Download PDF

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Publication number
EP4036387B1
EP4036387B1 EP22153249.2A EP22153249A EP4036387B1 EP 4036387 B1 EP4036387 B1 EP 4036387B1 EP 22153249 A EP22153249 A EP 22153249A EP 4036387 B1 EP4036387 B1 EP 4036387B1
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EP
European Patent Office
Prior art keywords
ignition plug
engine
ignition
cylinder
unit swing
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.)
Active
Application number
EP22153249.2A
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English (en)
French (fr)
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EP4036387A1 (de
Inventor
Shinichi Yamada
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.)
Suzuki Motor Corp
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Suzuki Motor Corp
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Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Publication of EP4036387A1 publication Critical patent/EP4036387A1/de
Application granted granted Critical
Publication of EP4036387B1 publication Critical patent/EP4036387B1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders

Definitions

  • a front side of the frame member is separated from the crankcase having a large engine width, and it is easy to ensure a gap between the second ignition plug and peripheral components.
  • the frame member of the vehicle body frame extends in an upper-lower direction in front of the crankcase, and the second ignition plug is disposed inside the frame member and in front of the frame member. Therefore, the second ignition plug can be added to the unit swing engine without affecting a layout of the peripheral components. Even when the unit swing engine swings, the second ignition plug does not interfere with the peripheral components.
  • a method such as adding a catalyst to an exhaust system or increasing a size of the catalyst is generally used in order to clear an exhaust gas regulation.
  • a noble metal is used for the catalyst, there is a problem that a cost increases.
  • twin plugs for the unit swing engine 40 as a countermeasure against an exhaust gas, but it is necessary to greatly change a layout of peripheral components of the unit swing engine 40. Therefore, in the unit swing engine 40 according to the present embodiment, an arrangement of the twin plugs is devised to minimize the change from the existing layout of the peripheral components.
  • FIG. 2 is a perspective view of the unit swing engine according to the present embodiment.
  • FIG. 3 is a left side view of the unit swing engine according to the present embodiment.
  • FIG. 4 is a front view of the cylinder head according to the present embodiment.
  • FIG. 5 is a cross-sectional view of the unit swing engine in FIG. 3 taken along a line A-A.
  • FIG. 6 is a cross-sectional view of the unit swing engine in FIG. 3 taken along a line B-B.
  • some members are omitted from the unit swing engine.
  • a cylindrical accommodating portion 78 is formed at a center position of the partition wall 77 in the upper-lower direction, and the first ignition plug 61 is inserted into the accommodating portion 78 so as to aim at a center of the combustion chamber 71 (see FIG. 9 ).
  • the second ignition plug 64 is inserted into the left side surface of the cylinder head 52 so as to aim at a left end of the combustion chamber 71 (see FIG. 9 ).
  • the second ignition plug 64 is disposed on a side opposite to the cam chain chamber 73 with the first ignition plug 61 interposed therebetween. Therefore, it is not necessary to increase the number of components and the number of work steps in order to allow the second ignition plug 64 to pass through the cam chain chamber 73. In addition, maintenance at the time of replacement of the second ignition plug 64 is also facilitated.
  • the left side surface of the cylinder head 52 is recessed to form the attachment seat surface 65 of the second ignition plug 64 (see FIG. 4 ).
  • the insertion hole 66 for the second ignition plug 64 is formed in the attachment seat surface 65.
  • the attachment seat surface 65 is located on a straight line L1 passing through centers of the left pair of bolts 74.
  • the attachment seat surface 65 does not largely protrude from the straight line L1, and a mating surface of the cylinder head 52 and the cylinder 51 is made small, so that the cylinder unit 50 is formed compactly.
  • the water jacket 88 is formed in vicinity of the attachment seat surface 65, and the second ignition plug 64 is cooled by the cooling water of the water jacket 88.
  • FIG. 7 is a left side view of the unit swing engine and the vehicle body frame according to the present embodiment.
  • FIG. 8 is a front view of the unit swing engine and the vehicle body frame according to the present embodiment.
  • FIG. 9 is a cross-sectional view of the unit swing engine in FIG. 7 taken along a line C-C. In FIG. 8 , the high tension cord is omitted.
  • the engine suspension portion 47 of the unit swing engine 40 is supported by the bracket 14 of the vehicle body frame 10 such that the cylinder unit 50 enters inside of the cradle shape of the vehicle body frame 10.
  • the pair of rear frames 13 extend in the upper-lower direction in front of the crankcase 41. More specifically, each of the pair of rear frames 13 rises obliquely rearward from a lower portion of the lower frame 12 so as to cross a lateral side of the cylinder 51.
  • the cylinder head 52 having a relatively narrow engine width is present in front of the rear frame 13, and the crankcase 41 having a relatively wide engine width is present behind the rear frame 13.
  • the high tension cords 68, 69 can be shortened to suppress an influence on the layout of the peripheral components.
  • the ignition coil 67 and the second ignition plug 64 are attached to a left side of the unit swing engine 40, the high tension cord 69 connecting the ignition coil 67 and the second ignition plug 64 can be shortened.
  • the ignition coil 67 is disposed in front of the engine suspension portion 47, and a swing range of the ignition coil 67 is suppressed, and the influence on the layout of the peripheral components is suppressed.
  • the thermostat attachment portion 81 slightly protruding from the left side surface of the cylinder head 52 is formed above the second ignition plug 64.
  • the thermostat cover 83 that covers the thermostat 82 (see FIG. 6 ) is attached to the thermostat attachment portion 81.
  • the second ignition plug 64 and the thermostat cover 83 are both provided on the left side surface of the cylinder head 52, and the second ignition plug 64 is located more inward than the thermostat cover 83 in an engine width direction. Since the second ignition plug 64 does not protrude outward (leftward) from the thermostat cover 83, a gap between the second ignition plug 64 and the peripheral components is ensured.
  • the inlet pipe 85 extends downward from the thermostat cover 83, and the inlet pipe 85 partially overlaps with the second ignition plug 64 in a side view.
  • the inlet pipe 85 effectively protects the second ignition plug 64 from flying objects from the lateral side. Since the inlet pipe 85 passes through outside of the second ignition plug 64, installation of the inlet pipe 85 is not hindered by the second ignition plug 64. Since the second ignition plug 64 does not protrude outward (leftward) from the inlet pipe 85, the gap between the second ignition plug 64 and the peripheral components is ensured.
  • the high tension cords 68, 69 are connected to the ignition coil 67 from the first and second ignition plugs 61, 64 through outside of the inlet pipe 85. Therefore, installation of the high tension cords 68, 69 is not hindered by the inlet pipe 85.
  • the exhaust side connection portion 57 protrudes obliquely downward to the right from the lower surface of the cylinder head 52, and the exhaust pipe (not shown) connected to the exhaust side connection portion 57 extends rearward through a right side of the unit swing engine 40.
  • the second ignition plug 64 and the ignition coil 67 are disposed on the left side of the unit swing engine 40, which is a side opposite to the exhaust pipe, so as to ensure a passage of the exhaust pipe.
  • the unit swing engine 40 is supported by the vehicle body frame 10 in a state where the cylinder unit 50 is tilted forward.
  • the engine width on the front side of the engine where the cylinder 51 and the cylinder head 52 are present is narrower than that on the rear side of the engine where the crankcase 41 is present. Therefore, the front side of the rear frame 13 is separated from the crankcase 41 having the large engine width, and it is easy to ensure the gap between the second ignition plug 64 and the peripheral components. Since the second ignition plug 64 is disposed in front of the rear frame 13, the second ignition plug 64 can be added to the unit swing engine 40 without affecting the layout of the peripheral components. Even when the unit swing engine 40 swings, the second ignition plug 64 does not interfere with the peripheral components.
  • the second ignition plug, the ignition coil and the thermostat cover are provided on the left side of the unit swing engine, but the second ignition plug, the ignition coil and the thermostat cover may be provided on the right side of the unit swing engine.
  • the vehicle body frame is formed in the cradle shape, but the vehicle body frame is not limited to the cradle shape, as long as the vehicle body frame includes a frame member extending in the upper-lower direction in front of the crankcase.
  • the long side direction of the ignition coil is directed to the engine swing direction, but the long side direction of the ignition coil may not be directed to the engine swing direction as long as the long side direction of the ignition coil is along the extending direction of the frame member.
  • the cylinder head is provided with the thermostat and the thermostat cover, but the cylinder may be provided with the thermostat and the thermostat cover.
  • the unit swing engine according to the present embodiment may be adopted, not limited to the straddle-type vehicle shown in the drawings, in other types of straddle-type vehicles.
  • the straddle-type vehicle is not limited to general vehicles in which a rider rides in a posture of straddling a seat, and also includes a small-sized scooter type vehicle in which a rider rides without straddling a seat.
  • a unit swing engine (40) is a unit swing engine swingably supported by a vehicle body frame (10), and the unit swing engine includes: a cylinder (51) tilted forward horizontally or nearly horizontally; a cylinder head (50) connected to a front surface of the cylinder; a crankcase (41) connected to a rear surface of the cylinder; a first ignition plug (61) disposed on a top surface of the cylinder head; and a second ignition plug (64) disposed on a side surface of the cylinder head.
  • the vehicle body frame includes a frame member (rear frame 13) extending in an upper-lower direction in front of the crankcase, and the second ignition plug is disposed inside the frame member and in front of the frame member.
  • an engine width on a front side of the engine where the cylinder and the cylinder head are present is narrower than that on a rear side of the engine where the crankcase is present. Therefore, a front side of the frame member is separated from the crankcase having a large engine width, and it is easy to ensure a gap between the second ignition plug and peripheral components. Since the second ignition plug is disposed in front of the frame member, the second ignition plug can be added to the unit swing engine without affecting a layout of the peripheral components. Even when the unit swing engine swings, the second ignition plug does not interfere with the peripheral components.
  • the unit swing engine further includes: an ignition coil (67) configured to apply a discharge voltage to the first ignition plug and the second ignition plug.
  • the ignition coil is disposed behind the second ignition plug on an engine outer surface on one side in an engine width direction as the second ignition plug. According to this configuration, a positional relationship between the ignition coil and the first and second ignition plugs is fixed by attaching the ignition coil to the unit swing engine. It is not necessary to provide a margin for a length of a high tension code, and the high tension code can be shortened to suppress an influence on the layout of the peripheral components.
  • the ignition coil and the second ignition plug are attached to the one side of the unit swing engine in the engine width direction, the high tension cord connecting the ignition coil and the second ignition plug can be shortened.
  • a dead space is formed behind the second ignition plug by the cylinder and the crankcase, and the dead space can be effectively used as an arrangement space for the ignition coil.
  • an engine suspension portion (47) is provided on an upper surface of the crankcase, and the ignition coil is disposed in a space surrounded by the crankcase, the cylinder and the frame member in front of the engine suspension portion.
  • a long side direction of the ignition coil is directed to an engine swing direction (D) such that the long side direction of the ignition coil is along the frame member.
  • D engine swing direction
  • a gap between the ignition coil and the frame member can be ensured.
  • a strength against a gravity applied to the ignition coil when the unit swing engine swings is increased.
  • the unit swing engine further includes: a thermostat (82) configured to open and close a cooling water passage according to a cooling water temperature; and a thermostat cover (83) configured to cover the thermostat.
  • the thermostat cover is attached to a side surface of the cylinder or the cylinder head on an one side in an engine width direction as the second ignition plug, and the second ignition plug is located more inward than the thermostat cover in the engine width direction. According to this configuration, since the second ignition plug does not protrude outward from the thermostat cover, the gap between the second ignition plug and the peripheral components is ensured. In addition, the engine width does not increase due to addition of the second ignition plug to the unit swing engine.
  • a pipe (inlet pipe 85) is attached to the thermostat cover, and the pipe overlaps with the second ignition plug in a side view.
  • the pipe protects the second ignition plug from flying objects from a lateral side. Since the pipe passes through the lateral side of the second ignition plug, installation of the pipe is not hindered by the second ignition plug. Since the second ignition plug does not protrude outward from the pipe, the gap between the second ignition plug and the peripheral components is ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (7)

  1. Zweiradfahrzeug (1), umfassend:
    einen Fahrzeugkarosserierahmen (10); und
    einen Einheitsschwenkmotor (40), der schwenkbar durch den Fahrzeugkarosserierahmen (10) getragen wird,
    dadurch gekennzeichnet, dass der Einheitsschwenkmotor (40) Folgendes umfasst:
    einen Zylinder (51), der horizontal oder nahezu horizontal nach vorne geneigt ist;
    einen Zylinderkopf (52), der mit einer Vorderfläche des Zylinders (51) in einer von vorn nach hinten verlaufenden Richtung des Zweiradfahrzeugs (1) verbunden ist;
    ein Kurbelgehäuse (41), das in der von vorn nach hinten verlaufenden Richtung mit einer Rückfläche des Zylinders (51) verbunden ist;
    eine erste Zündkerze (61), die an einer Vorderfläche des Zylinderkopfes (52) in der von vorn nach hinten verlaufenden Richtung angeordnet ist; und
    eine zweite Zündkerze (64), die an einer Seitenfläche des Zylinderkopfes (52) in einer von links nach rechts verlaufenden Richtung des Zweiradfahrzeugs (1) angeordnet ist,
    wobei der Fahrzeugkarosserierahmen (10) ein Rahmenelement (13) beinhaltet, das sich in einer von oben nach unten verlaufenden Richtung des Zweiradfahrzeugs (1) vor dem Kurbelgehäuse (41) in der von vorn nach hinten verlaufenden Richtung erstreckt, und
    wobei die zweite Zündkerze (64) innerhalb des Rahmenelements (13) und in der von vorn nach hinten verlaufenden Richtung vor dem Rahmenelement (13) angeordnet ist.
  2. Zweiradfahrzeug (1) nach Anspruch 1, ferner umfassend:
    eine Zündspule (67), die dazu konfiguriert ist, eine Entladespannung an die erste Zündkerze (61) und die zweite Zündkerze (64) anzulegen,
    wobei die Zündspule (67) hinter der zweiten Zündkerze (64) in der von vorn nach hinten verlaufenden Richtung auf einer Motoraußenfläche auf einer Seite in der von links nach rechts verlaufenden Richtung wie die zweite Zündkerze (64) angeordnet ist.
  3. Zweiradfahrzeug nach Anspruch 2,
    wobei ein Motoraufhängungsabschnitt (47) an einer oberen Fläche des Kurbelgehäuses (41) in der von oben nach unten verlaufenden Richtung bereitgestellt ist, und
    wobei die Zündspule (67) in einem von dem Kurbelgehäuse (41), dem Zylinder (51) und dem Rahmenelement (13) umgebenen Raum in der von vorn nach hinten verlaufenden Richtung vor dem Motoraufhängungsabschnitt (47) angeordnet ist.
  4. Zweiradfahrzeug (1) nach Anspruch 2 oder 3,
    wobei eine Längsseitenrichtung der Zündspule (67) in eine Motorschwenkrichtung (D) weist, sodass die Längsseitenrichtung der Zündspule (67) entlang des Rahmenelements (13) verläuft.
  5. Zweiradfahrzeug (1) nach einem der Ansprüche 1 bis 4, ferner umfassend:
    einen Thermostat (82), der dazu konfiguriert ist, einen Kühlwasserkanal gemäß einer Kühlwassertemperatur zu öffnen und zu schließen; und
    eine Thermostatabdeckung (83), die dazu konfiguriert ist, den Thermostat (82) abzudecken,
    wobei die Thermostatabdeckung (83) an einer Seitenfläche des Zylinders (51) oder des Zylinderkopfes (52) auf einer Seite in der von links nach rechts verlaufenden Richtung als zweite Zündkerze (64) angebracht ist, und
    wobei die zweite Zündkerze (64) in der von links nach rechts verlaufenden Richtung weiter innen als die Thermostatabdeckung (83) angeordnet ist.
  6. Zweiradfahrzeug (1) nach Anspruch 5,
    wobei die Thermostatabdeckung (83) in der von oben nach unten verlaufenden Richtung oberhalb der zweiten Zündkerze (64) an dem Zylinderkopf (52) angebracht ist.
  7. Zweiradfahrzeug (1) nach Anspruch 6,
    wobei ein Rohr (85) an der Thermostatabdeckung (83) angebracht ist, und
    wobei sich das Rohr (85) in einer Seitenansicht des Einheitsschwenkmotors (40) mit der zweiten Zündkerze (64) überschneidet.
EP22153249.2A 2021-01-28 2022-01-25 Einheitsschwenkmotor Active EP4036387B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021011836A JP7494747B2 (ja) 2021-01-28 2021-01-28 ユニットスイングエンジン

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Publication Number Publication Date
EP4036387A1 EP4036387A1 (de) 2022-08-03
EP4036387B1 true EP4036387B1 (de) 2024-07-10

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EP22153249.2A Active EP4036387B1 (de) 2021-01-28 2022-01-25 Einheitsschwenkmotor

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JP (1) JP7494747B2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025210662A1 (en) * 2024-03-30 2025-10-09 Hero MotoCorp Limited Straddle-ride type vehicle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114261A (en) * 1979-02-24 1980-09-03 Fuji Oil Co Ltd Chocolate for flozen food

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4689474B2 (ja) * 2006-01-11 2011-05-25 本田技研工業株式会社 内燃機関
JP4550018B2 (ja) * 2006-06-23 2010-09-22 本田技研工業株式会社 車両用内燃機関
JP4313413B2 (ja) * 2008-01-28 2009-08-12 本田技研工業株式会社 内燃機関
JP5089421B2 (ja) * 2008-02-14 2012-12-05 本田技研工業株式会社 自動二輪車用点火コイル配置構造
JP2010001025A (ja) * 2009-10-07 2010-01-07 Yamaha Motor Co Ltd 鞍乗型車両
JP4967043B2 (ja) * 2010-05-24 2012-07-04 本田技研工業株式会社 内燃機関の点火コイル配置構造
JP5291691B2 (ja) * 2010-11-30 2013-09-18 本田技研工業株式会社 鞍乗型車両
JP2013068161A (ja) * 2011-09-22 2013-04-18 Yamaha Motor Co Ltd 自動二輪車
JP6036255B2 (ja) * 2012-12-17 2016-11-30 スズキ株式会社 エンジンの点火プラグ配置構造
JP2015098798A (ja) * 2013-11-18 2015-05-28 スズキ株式会社 車両用内燃機関
JP6420884B2 (ja) * 2017-11-24 2018-11-07 本田技研工業株式会社 ユニットスイングエンジンにおけるノックセンサ取付け構造

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114261A (en) * 1979-02-24 1980-09-03 Fuji Oil Co Ltd Chocolate for flozen food

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EP4036387A1 (de) 2022-08-03
JP2022115301A (ja) 2022-08-09
JP7494747B2 (ja) 2024-06-04

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