EP1092849B1 - Brennkraftmaschine - Google Patents
Brennkraftmaschine Download PDFInfo
- Publication number
- EP1092849B1 EP1092849B1 EP00122171A EP00122171A EP1092849B1 EP 1092849 B1 EP1092849 B1 EP 1092849B1 EP 00122171 A EP00122171 A EP 00122171A EP 00122171 A EP00122171 A EP 00122171A EP 1092849 B1 EP1092849 B1 EP 1092849B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- engine
- axis
- internal combustion
- crankshaft
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 230000005484 gravity Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
-
- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0002—Cylinder arrangements
- F02F7/0019—Cylinders and crankshaft not in one plane (deaxation)
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
Definitions
- This invention relates to an internal combustion engine, in particular four-stroke cycle engine, according to the preamble part of the independent claim 1.
- the above method has problems: Since the engine as a whole is displaced with respect to the drive shaft by the use of gears, the weight of the engine increases. Moreover, since the rotating direction of the engine is changed by the use of gears, the engine must be modified to cope with the reverse rotation as by providing gears also on the rotating component side. Moreover, since the entire engine is displaced, the center of gravity is also displaced and the problem of vibration is aggravated.
- FIG. 1 is a side view of a four-stroke cycle engine in which the invention is embodied and which is mounted in an outboard motor as an example.
- the outboard motor 1 is provided with; a clamp bracket 3 removably attached to the a rear part of a hull 2, a swivel bracket 6 supported for up and down swinging about a tilt shaft 5 on the clamp bracket 3, and a propulsion unit 7 supported for horizontal swiveling on the swivel bracket 6.
- the propulsion unit 7 has an upper case 9 supported for rotation with the swivel bracket 6, and a lower case 10 attached to the lower part of the upper case 9.
- the upper and lower cases 9 and 10 constitute a single casing as a whole.
- a propeller 11 is attached to the lower case 10.
- a bottom cowling 12 is attached to the top of the upper case 9.
- a top cowling 13 is removably attached to the bottom cowling 12.
- An engine 14 is mounted on the upper case 9.
- the engine 14 is, for example, of the single cylinder, overhead valve, four-stroke cycle type.
- An engine body comprises; a head cover 15, a cylinder head 16, a cylinder body 17, and a crankcase 19 serving also as an oil pan.
- a cylinder 20 and a piston 21 are disposed horizontally, and a crankshaft 22 is disposed vertically.
- the cylinder head 16 is provided with an intake valve 23, an exhaust valve 24, and an exhaust port 25.
- a recoil starter 26 is attached to the top of the crankshaft 22.
- the numeral 18 denotes a drive shaft connected to the crankshaft 22, and the numeral 27 denotes a fuel tank disposed in front of the cylinder body 17.
- FIG. 2(A) shows a cross section of the swivel bracket 6 and its vicinity in FIG. 1.
- FIG. 2(B) shows the cross section B-B in FIG. 2(A).
- An upper tube 8 for supporting the engine 14 is formed in tubular shape with an internal exhaust passage 8a. In the exhaust passage 8a are disposed: the drive shaft 18, a shift rod 62, and a cooling water pipe 61 in the vertical direction.
- An oil pan connecting portion 8b flaring like a dish is formed in the upper part of the upper tube 8.
- a small diameter tubular portion 8c is formed in the lower part of the upper tube 8.
- the swivel bracket 6 is formed in tubular shape and its inside circumference is formed with support flanges 6a extending horizontally in two, upper and lower positions.
- mounts 28 made of an elastic material such as rubber are disposed between the tubular portion 8c of the upper tube 8 and the support flanges 6a of the swivel bracket 6 in two, upper and lower positions.
- a full pivot type of outboard motor that enables the boat to go forward and backward is constituted in which the upper tube 8 is supported for 360 degree rotation on the swivel bracket 6 through the mounts 28.
- a bush 28a is interposed between the upper tube 8 and the mounts 28.
- FIG. 3 is a cross-sectional view as seen in the direction of arrows X-X in FIG. 1. Incidentally, the same parts are provided with the same reference numerals and their explanations are sometimes omitted in the following description.
- the crankshaft 22 is provided with a crank pin 29 and counterweights 30.
- the crank pin 29 is connected through a connecting rod 31 to the piston 21.
- a camshaft 32 is disposed in the cylinder body 17 parallel to the crankshaft 22 so that the rotation of the crankshaft 22 is transmitted to the camshaft 32 through gears 33 and 34.
- a carburetor 43 and an ignition plug 44 is shown in the drawing.
- a valve drive chamber 35 is formed in the cylinder head 16 and the head cover 15.
- the exhaust valve 24 (also the intake valve 23) extends through the cylinder head 16 into the valve drive chamber 35 and comes into contact with one end of a rocker arm 39 through a valve spring 36 and a retainer 37.
- a lifter 40 is slidably disposed in the cylinder body 17. One end of the lifter 40 is in contact with a cam of the camshaft 32. The other end of the lifter 40 is in contact with the other end of the rocker arm 39 through a push rod 41.
- the plunger of a fuel pump 42 is also in contact with the cam of the camshaft 32.
- FIG. 4 shows a cross section of an essential part of FIG. 3 in a larger scale.
- One end of the connecting rod 31 is rotatably connected to the crank pin 29 using bolts 46.
- the other end of the connecting rod 31 is connected to the piston 21 through a piston pin 45.
- the an axis L2 of the cylinder 20 is displaced by a distance D1 in the direction opposite the direction of the lateral component F of the thrust acting on the piston 21 with respect to the a line L1 that is parallel to the cylinder 20 and passes the axis of the crankshaft 22.
- the axis of the piston pin 45 is displaced by a distance D2 in the direction of the lateral component of the thrust with respect to the axis L2 of the cylinder 20.
- FIGs. 5 and 6 show a four-stroke cycle engine as another embodiment of the invention.
- FIG. 5 is a side view partially in cross section of the engine applied to an outboard motor as an example.
- FIG. 6 is a cross-sectional view as seen in the direction of arrows X-X in FIG. 5.
- the same parts as those in the previous embodiment are provided with the same reference numerals and their explanations are omitted.
- the axis L2 of the cylinder 20 is displaced by the distance D1 in the direction opposite the thrust component direction with respect to the line L1 that is parallel to the cylinder 20 and passes the axis of the crankshaft 22.
- a silencer 47 is shown in FIG. 5.
- FIG. 7 is a horizontal cross-sectional view of still another embodiment of the invention.
- This embodiment shows an example of a double overhead camshaft type of multicylinder four-stroke cycle engine, with an intake cam 49 and an exhaust cam 50.
- the axis L2 of the cylinder 20 is displaced by the distance D1 in the direction opposite the thrust component direction with respect to the line L1 that is parallel to the cylinder 20 and passes the axis of the crankshaft 22.
- the invention makes it possible to improve operation efficiency and durability by reducing the lateral component of the thrust acting on the piston, to make the engine compact without increasing weight and without changing the direction of rotation. And since the crankshaft made of a heavy iron-based material is not shifted, the amount of vibration is held to a minimum as the amount of center of gravity shift is reduced. As a result, since the lateral component of the thrust acting on the cylinder is reduced, an iron-made sleeve can be disused, an aluminium-made cylinder can be used, resulting in the reduction in weight and cost.
- the invention makes it possible to dispose the engine components in the space produced by shifting the cylinder and the cylinder head with respect to the crankshaft.
- the invention makes it possible to hold down the vibration and reduce the size of the engine especially effectively when the invention is applied to the outboard motor that is used at high revolutions and subject to wide variation in the revolution.
- the invention makes it possible to further reduce vibration.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Claims (8)
- Brennkraftmaschine (14), insbesondere ein Viertakt- Motor, aufweisend zumindest einen Zylinder (20), gebildet in einem Motorkörper, einen Kolben (21), gleitend in dem Zylinder (20) angeordnet, und eine Kurbelwelle (22), verbunden mit dem Kolben (21) durch eine Pleuelstange (31), wobei eine Zylinderachse (L2) des Zylinders (20) verlagert ist, seitlich versetzt in Bezug auf eine parallele Linie (L1), die eine Achse der Kurbelwelle (22) schneidet, dadurch gekennzeichnet, dass eine Achse eines Kolbenbolzens (45) verlagert ist, um einen Abstand (D2) in Richtung zu der parallelen Linie (L1) in eine Richtung einer seitlichen Druckkomponente (F), die auf den Kolben (21) in Bezug auf die Achse (L2) des Zylinders (20) wirkt, wobei Halterungen (28)vorgesehen sind, um den Motor zu lagern, wobei die Halterungen (28) eine sich ändernde Wanddicken haben, derart, dass die Wanddicke von Teilen jeder der Halterungen (28) auf der Seite entgegengesetzt zu einer Verlagerungsrichtung der Zylinderachse erhöht ist, verglichen mit der Seite, die sich in die Richtung der Verlagerungsrichtung der Zylinderachse (L2) erstreckt.
- Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Zylinderachse (L2) in eine Richtung entgegengesetzt zu der Richtung der seitlichen Druckkomponente (F), die auf den Kolben (21) wirkt, verlagert ist, relativ zu der Linie (L1) die sich parallel zur Zylinderachse (L2) erstreckt und die die Achse der Kurbelwelle (22) schneidet.
- Brennkraftmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Motorbauteile, insbesondere eine Nockenwelle (32), eine Kraftstoffpumpe (42) und ein Vergaser (43) in einem Bereich einer Seitenoberfläche des Motors, die zu der Verlagerungsrichtung der Zylinderachse (L2) entgegengesetzt ist, angeordnet sind.
- Brennkraftmaschine nach zumindest einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass einige Motorbauteile, insbesondere ein Vergaser (43) und ein Kraftstofftank (27), in dem Bereich der Seitenoberfläche des Motors, der zu der Verlagerungsrichtung der Zylinderachse (L2) entgegengesetzt ist, angeordnet sind, einige der Motorbauteile, z. B. die Nockenwelle (32), an einer Seitenoberfläche des Motors angeordnet sind, die der Verlagerungsrichtung der Zylinderachse (L2) in Bezug auf die Linie (L1)entspricht, die sich parallel erstreckt und die Achse der Kurbelwelle (22) scheidet, und einige der Motorkomponenten, insbesondere die Kraftstoffpumpe (42), außerhalb des Zylinderblockkörpers (17) des Motors angeordnet sind.
- Brennkraftmaschine nach zumindest einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Motor eine Teil des Außenbordmotors bildet und die Kurbelwelle (22) im Wesentlichen vertikal angeordnet ist.
- Brennkraftmaschine nach zumindest einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Ventilantriebskammer (35) in einem Zylinderkopf (16) und einer Kopfabdeckung (15) des Motors gebildet ist, wobei die Ventile (23, 24) über eine Kipphebelarmvorrichtung (39) und einen Heber (40) angetrieben werden, wobei der Heber (40) durch eine Druckstange (41) in Kontakt mit einem Ende des Kipphebelarms (39) ist und andererseits, in dem Zylinderkörper (17) gleitbar angeordnet, durch einen Nocken der Nockenwelle (32), der in Kontakt mit dem Ende des Hebers (40) ist, betätigt wird.
- Brennkraftmaschine nach zumindest einem der vorhergehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Nockenwelle (42) von der Kurbelwelle (22) mittels Zahnräder (33, 34), die miteinander im Kämmeingriff sind, angetrieben wird.
- Brennkraftmaschine nach zumindest einem der vorhergehenden Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kurbelwelle (22) aus eisen- basierten Material hergestellt ist, während der Zylinder aus einer Aluminium- basierten Legierung, die Aluminium enthält, hergestellt werden kann.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28902999 | 1999-10-12 | ||
JP28902999A JP2001107800A (ja) | 1999-10-12 | 1999-10-12 | 4サイクルエンジン |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1092849A2 EP1092849A2 (de) | 2001-04-18 |
EP1092849A3 EP1092849A3 (de) | 2002-04-17 |
EP1092849B1 true EP1092849B1 (de) | 2006-06-28 |
Family
ID=17737915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00122171A Expired - Lifetime EP1092849B1 (de) | 1999-10-12 | 2000-10-12 | Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1092849B1 (de) |
JP (1) | JP2001107800A (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10865734B2 (en) | 2017-12-06 | 2020-12-15 | Ai Alpine Us Bidco Inc | Piston assembly with offset tight land profile |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017089415A (ja) | 2015-11-04 | 2017-05-25 | スズキ株式会社 | 燃料タンク内蔵型の船外機 |
JP6734145B2 (ja) * | 2016-08-22 | 2020-08-05 | ヤマハ発動機株式会社 | 船外機 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5076220A (en) * | 1980-12-02 | 1991-12-31 | Hugh G. Evans | Internal combustion engine |
US5331932A (en) * | 1992-08-11 | 1994-07-26 | Unisia Jecs Corporation | Engine piston |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2726459B2 (ja) * | 1988-12-01 | 1998-03-11 | ヤマハ発動機株式会社 | ピストン・クランク機構 |
US5049100A (en) * | 1989-04-17 | 1991-09-17 | Honda Giken Kogyo Kabushiki Kaisha | Outboard engine unit |
JP2883626B2 (ja) | 1989-04-17 | 1999-04-19 | 本田技研工業株式会社 | 駆動軸オフセット型船外機 |
US5443044A (en) * | 1994-04-29 | 1995-08-22 | Outboard Marine Corporation | Outboard motor with four stroke engine |
JP3583254B2 (ja) * | 1997-02-28 | 2004-11-04 | 川崎重工業株式会社 | 小型滑走艇 |
JP3950204B2 (ja) * | 1997-09-12 | 2007-07-25 | 本田技研工業株式会社 | 空冷エンジンを搭載した船外機 |
-
1999
- 1999-10-12 JP JP28902999A patent/JP2001107800A/ja active Pending
-
2000
- 2000-10-12 EP EP00122171A patent/EP1092849B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5076220A (en) * | 1980-12-02 | 1991-12-31 | Hugh G. Evans | Internal combustion engine |
US5331932A (en) * | 1992-08-11 | 1994-07-26 | Unisia Jecs Corporation | Engine piston |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10865734B2 (en) | 2017-12-06 | 2020-12-15 | Ai Alpine Us Bidco Inc | Piston assembly with offset tight land profile |
Also Published As
Publication number | Publication date |
---|---|
JP2001107800A (ja) | 2001-04-17 |
EP1092849A2 (de) | 2001-04-18 |
EP1092849A3 (de) | 2002-04-17 |
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