EP1092866A2 - Internal combustion engine - Google Patents
Internal combustion engine Download PDFInfo
- Publication number
- EP1092866A2 EP1092866A2 EP00122173A EP00122173A EP1092866A2 EP 1092866 A2 EP1092866 A2 EP 1092866A2 EP 00122173 A EP00122173 A EP 00122173A EP 00122173 A EP00122173 A EP 00122173A EP 1092866 A2 EP1092866 A2 EP 1092866A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- engine according
- crankshaft
- cylinder
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 20
- 239000007858 starting material Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000002828 fuel tank Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 5
- 239000000446 fuel Substances 0.000 claims 2
- 230000013011 mating Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
- 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 an outboard motor, especially the structure of a recoil starter and a flywheel, as indicated in the introductory portion of claim 1.
- Engines of outboard motors may be started manually or electrically.
- a recoil starter is attached to a flywheel secured to the top of the crankshaft, and a starter rope is provided to be pulled for starting the engine.
- the outboard motor with the conventional recoil starter has a problem that the engine height cannot be reduced because of the presence of a large unused space between the recoil starter and the flywheel.
- an objective of the present invention to provide an internal combustion engine to solve the above problem by providing an engine structure for outboard motors in which the engine height may be reduced by optimizing the layout of the recoil starter and the flywheel.
- said objective is performed by an internal combustion engine having the features of claim 1.
- FIGs. 1 to 5 show an embodiment of the engine structure of this invention for outboard motors.
- FIG. 1 is a side view partially in cross section of an outboard motor.
- the same components in different drawings are provided with the same reference numerals and their explanations are omitted, and the terms 'the front' and 'the rear' as used herein are respectively meant with respect to the advancing direction and the reverse direction of the boat.
- an outboard motor 1 is provided with; a clamp bracket 3 removably attached to the 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 rotatably supported 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 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 laid to extend from the front to the side of the cylinder body 17.
- the numeral 43 denotes a carburetor and the numeral 47 denotes a silencer.
- 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 bush 28a is interposed between the upper tube 8 and the mounts 28.
- FIG. 3 shows an enlarged cross section of the engine shown in FIG. 1.
- FIG. 4 shows a cross section cut along the line X-X in FIG. 1 and seen in the arrow direction.
- 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.
- the axis of the exhaust valve 24 (also of the intake valve 23) is tilted relative to the mating surface 52 between the cylinder head 16 and the cylinder body 17 to form a wedge-shaped combustion chamber 50.
- the mating surface 51 between the cylinder head 16 and the head cover 15 is tilted forward in the vertical direction relative to the axis of the exhaust valve 24.
- 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 valve drive chamber 35 is formed with the cylinder head 16 and the head cover 15.
- the exhaust valve 24 and the intake valve 23 extend 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.
- a flywheel 45 is attached to the top part of the crankshaft 22.
- a recoil starter 26 is attached to the top of the flywheel 45.
- the recoil starter 26 and the flywheel 45 are covered with a starter cover 46 secured to the cylinder body 17.
- a magnet 45a is disposed around the flywheel 45.
- An ignition coil 53 is disposed in the vicinity of outside circumference of the flywheel 45.
- a recessed breather chamber 47 is formed in the top part of the cylinder head 16 and tightly closed with a plate 49.
- a splasher gear 44 is provided to be driven with the crankshaft 22 and to splash oil into the cylinder body 17.
- FIG. 5(A) shows an enlarged cross section of an essential part of FIG. 3.
- FIG. 5(B) is a plan view of the flywheel. According to the invention, it is arranged that the dimension H1 of the flywheel 45 in the height direction overlaps with the dimension H2 of the recoil starter 26 in the height direction so as to reduce the engine height while retaining the mass of the flywheel 45. The arrangement will be hereinafter described in detail.
- the flywheel 45 and the pulley 54 of a bowl shape are secured with a bolt 55 to the top end of the crankshaft 22.
- the flywheel 45 is made up of a disk-shaped base plate 45b and projections 45c, 45d extending up and down from the peripheral part of the base plate 45b.
- a water drain hole 45e is bored in the base plate 45b.
- the outside circumference of the pulley 54 is also formed with a plurality of engagement recesses 54a.
- a rotor 56 and a guide member 60 are rotatably mounted on the underside of the starter cover 46.
- the rotor 56 is connected through a rope 57 to a starter handle 59.
- the guide member 60 is provided in its central part with a recess 60a and a guide portion 60b formed at the lower peripheral part of the recess 60a and is mounted in a position so that the bolt 55 is located within the recess 60a.
- An engagement arm 61 rotatable about a shaft 61a is attached to the underside of the rotor 56.
- the engagement arm 61, the pulley 54, and the rotor 56 constitute a one-way clutch.
- the rotor 56 When the starter handle 59 is pulled, the rotor 56 is rotated with the rope 57, the engagement arm 61, as guided with the guide member 60, engages with the engagement recess 54a of the pulley 54, so that the pulley 54 and the crankshaft 22 rotate.
- the one-way clutch works to disengage the engagement arm 61.
- the invention is not limited to the above embodiment but may be embodied in various ways.
- the invention is applied to a single cylinder, overhead valve, four-stroke type of engine in the above embodiment, the invention may also be applied to multicylinder engines, overhead camshaft type of engines, or two-stroke cycle engines.
- the engine height may be reduced by optimizing the layout of the recoil starter and the flywheel.
- the flywheel mass may be secured to absorb variations in revolution.
- crankshaft is based of iron-based material while the cylinder can be made of an aluminium based alloy including aluminium.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Pulleys (AREA)
Abstract
Description
- This invention relates to an internal combustion engine, in particular an outboard motor, especially the structure of a recoil starter and a flywheel, as indicated in the introductory portion of claim 1.
- Engines of outboard motors may be started manually or electrically. In the case the engine is started manually, a recoil starter is attached to a flywheel secured to the top of the crankshaft, and a starter rope is provided to be pulled for starting the engine.
- However, the outboard motor with the conventional recoil starter has a problem that the engine height cannot be reduced because of the presence of a large unused space between the recoil starter and the flywheel.
- Accordingly, it is an objective of the present invention to provide an internal combustion engine to solve the above problem by providing an engine structure for outboard motors in which the engine height may be reduced by optimizing the layout of the recoil starter and the flywheel.
- According to the present invention, said objective is performed by an internal combustion engine having the features of claim 1.
- Preferred embodiments are laid down in the further subclaims.
- Embodiments of the invention will be hereinafter described with reference to the appended drawings.
- FIG. 1 shows an outboard motor partially in cross section, with a breather chamber structure as an embodiment of the invention;
- FIG. 2(A) shows a cross section of a
swivel bracket 6 shown in FIG. 1 and its vicinity. - FIG. 2(B) shows the cross section B-B in FIG. 2(A);
- FIG. 3 is an enlarged cross-sectional view of the engine shown in FIG. 1;
- FIG. 4 shows a cross section cut along the line X-X in FIG. 1 and seen in the arrow direction; and
- FIG. 5(A) shows an enlarged cross section of an essential part of FIG. 3. FIG. 5(B) is a plan view of the flywheel.
-
- FIGs. 1 to 5 show an embodiment of the engine structure of this invention for outboard motors. FIG. 1 is a side view partially in cross section of an outboard motor. Incidentally, the same components in different drawings are provided with the same reference numerals and their explanations are omitted, and the terms 'the front' and 'the rear' as used herein are respectively meant with respect to the advancing direction and the reverse direction of the boat.
- As shown in FIG. 1, an outboard motor 1 is provided with; a
clamp bracket 3 removably attached to the rear part of a hull 2, aswivel bracket 6 supported for up and down swinging about atilt shaft 5 on theclamp bracket 3, and a propulsion unit 7 supported for horizontal swiveling on theswivel bracket 6. The propulsion unit 7 has an upper case 9 rotatably supported with theswivel bracket 6, and alower case 10 attached to the lower part of the upper case 9. The upper andlower cases 9 and 10 constitute a single casing as a whole. Apropeller 11 is attached to thelower case 10. A bottom cowling 12 is attached to the top of the upper case 9. Atop cowling 13 is removably attached to the bottom cowling 12. - An
engine 14 is mounted on the upper case 9. Theengine 14 is, for example, of the single cylinder, overhead valve, four-stroke cycle type. An engine body comprises; ahead cover 15, acylinder head 16, acylinder body 17, and acrankcase 19 serving also as an oil pan. Acylinder 20 and apiston 21 are disposed horizontally, and acrankshaft 22 is disposed vertically. Thecylinder head 16 is provided with anexhaust valve 24 and anexhaust port 25. Arecoil starter 26 is attached to the top of thecrankshaft 22. Thenumeral 18 denotes a drive shaft connected to thecrankshaft 22, and thenumeral 27 denotes a fuel tank laid to extend from the front to the side of thecylinder body 17. Thenumeral 43 denotes a carburetor and thenumeral 47 denotes a silencer. - 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 theengine 14 is formed in tubular shape with aninternal exhaust passage 8a. In theexhaust passage 8a are disposed; thedrive shaft 18, ashift rod 62, and acooling water pipe 61 in the vertical direction. An oilpan connecting portion 8b flaring like a dish is formed in the upper part of the upper tube 8. A small diametertubular portion 8c is formed in the lower part of the upper tube 8. Theswivel bracket 6 is formed in tubular shape and its inside circumference is formed withsupport flanges 6a extending horizontally in two, upper and lower positions. When theswivel bracket 6 is installed around the upper tube 8,mounts 28 made of an elastic material such as rubber are disposed between thetubular portion 8c of the upper tube 8 and thesupport flanges 6a of theswivel bracket 6 in two, upper and lower positions. In this way, 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 theswivel bracket 6 through themounts 28. Abush 28a is interposed between the upper tube 8 and themounts 28. - FIG. 3 shows an enlarged cross section of the engine shown in FIG. 1. FIG. 4 shows a cross section cut along the line X-X in FIG. 1 and seen in the arrow direction. The
crankshaft 22 is provided with a crank pin 29 andcounterweights 30. The crank pin 29 is connected through a connectingrod 31 to thepiston 21. The axis of the exhaust valve 24 (also of the intake valve 23) is tilted relative to themating surface 52 between thecylinder head 16 and thecylinder body 17 to form a wedge-shaped combustion chamber 50. Themating surface 51 between thecylinder head 16 and thehead cover 15 is tilted forward in the vertical direction relative to the axis of theexhaust valve 24. - A
camshaft 32 is disposed in thecylinder body 17 parallel to thecrankshaft 22 so that the rotation of thecrankshaft 22 is transmitted to thecamshaft 32 throughgears valve drive chamber 35 is formed with thecylinder head 16 and thehead cover 15. Theexhaust valve 24 and theintake valve 23 extend through thecylinder head 16 into thevalve drive chamber 35 and comes into contact with one end of arocker arm 39 through avalve spring 36 and aretainer 37. Alifter 40 is slidably disposed in thecylinder body 17. One end of thelifter 40 is in contact with a cam of thecamshaft 32. The other end of thelifter 40 is in contact with the other end of therocker arm 39 through a push rod 41. With the above constitution, when thecamshaft 32 rotates, thelifter 40 and the push rod 41 slide to rock therocker arm 39, and to drive theintake valve 23 and theexhaust valve 24 to be opened and closed against thevalve spring 36 - A
flywheel 45 is attached to the top part of thecrankshaft 22. Arecoil starter 26 is attached to the top of theflywheel 45. Therecoil starter 26 and theflywheel 45 are covered with astarter cover 46 secured to thecylinder body 17. Amagnet 45a is disposed around theflywheel 45. Anignition coil 53 is disposed in the vicinity of outside circumference of theflywheel 45. Arecessed breather chamber 47 is formed in the top part of thecylinder head 16 and tightly closed with aplate 49. Asplasher gear 44 is provided to be driven with thecrankshaft 22 and to splash oil into thecylinder body 17. - Features of the embodiment will be hereinafter described in reference to FIG. 5. FIG. 5(A) shows an enlarged cross section of an essential part of FIG. 3. FIG. 5(B) is a plan view of the flywheel. According to the invention, it is arranged that the dimension H1 of the
flywheel 45 in the height direction overlaps with the dimension H2 of therecoil starter 26 in the height direction so as to reduce the engine height while retaining the mass of theflywheel 45. The arrangement will be hereinafter described in detail. - The
flywheel 45 and thepulley 54 of a bowl shape are secured with abolt 55 to the top end of thecrankshaft 22. Theflywheel 45 is made up of a disk-shapedbase plate 45b andprojections base plate 45b. Awater drain hole 45e is bored in thebase plate 45b. The outside circumference of thepulley 54 is also formed with a plurality ofengagement recesses 54a. - A
rotor 56 and aguide member 60 are rotatably mounted on the underside of thestarter cover 46. Therotor 56 is connected through arope 57 to astarter handle 59. Theguide member 60 is provided in its central part with a recess 60a and aguide portion 60b formed at the lower peripheral part of the recess 60a and is mounted in a position so that thebolt 55 is located within the recess 60a. Anengagement arm 61 rotatable about a shaft 61a is attached to the underside of therotor 56. Theengagement arm 61, thepulley 54, and therotor 56 constitute a one-way clutch. - When the
starter handle 59 is pulled, therotor 56 is rotated with therope 57, theengagement arm 61, as guided with theguide member 60, engages with theengagement recess 54a of thepulley 54, so that thepulley 54 and thecrankshaft 22 rotate. Once the engine starts, the one-way clutch works to disengage theengagement arm 61. - While an embodiment of the invention is described above, the invention is not limited to the above embodiment but may be embodied in various ways. For example, while the invention is applied to a single cylinder, overhead valve, four-stroke type of engine in the above embodiment, the invention may also be applied to multicylinder engines, overhead camshaft type of engines, or two-stroke cycle engines.
- As is clear from the above description, the engine height may be reduced by optimizing the layout of the recoil starter and the flywheel.
- With the invention, the flywheel mass may be secured to absorb variations in revolution.
- With the invention, water is prevented from collecting in the flywheel.
- The crankshaft is based of iron-based material while the cylinder can be made of an aluminium based alloy including aluminium.
Claims (14)
- Internal combustion engine, in particular for an outboard motor, comprising a crankshaft and a flywheel secured to one end thereof and a recoil starter which is disposed above the flywheel such that a height (H2) of a recoil starter (26) overlaps with the height (H1) of the flywheel.
- Internal combustion engine according to claim 1, wherein the recoil starter comprises; a rotor rotated with a rope, an engagement arm rotatably disposed on the rotor, and a guide member for enabling the engagement arm to engage with the pulley, characterized in that a recess is formed in the central part of the guide member, and a bolt for securing the flywheel to the crankshaft is disposed in the recess.
- Internal combustion engine according to claim 1 or 2, wherein the peripheral part of the flywheel is provided with projections extending in up and down directions.
- Internal combustion engine according to at least one of the preceding claims 1 to 3, wherein the flywheel is provided, in its top surface, with a water drain hole.
- Internal combustion engine according to at least one of the preceding claims 1 to 4, wherein a cylinder axis (L2) of the cylinder is displaced laterally offset with respect to a parallel line intersecting the axis of the crankshaft (22).
- Internal combustion engine according to at least one of the preceding claims 1 to 5, wherein the cylinder axis (L2) is displaced in a direction opposite to the direction of a lateral component of thrust (F) acting on the piston (21) relative to said line (L1) extending in parallel to the cylinder axis (L2) and intersecting the axis of the crankshaft (22).
- Internal combustion engine according to at least one of the preceding claims 1 to 6, wherein the axis of a piston pin (45) is displaced by a distance (D2) in the direction of a lateral component of the thrust (F) with respect to the axis (L2) of the cylinder (20).
- Internal combustion engine according to one of the preceding claims 1 to 7, wherein engine components, in particular a camshaft (32), a fuel pump (42), and a carburetor (43) are disposed in the area of a side surface of the engine that is opposite to the direction of displacement of the cylinder axis (L2).
- Internal combustion engine according to at least one of the preceding claims 1 to 8, wherein some engine components, in particular a carburetor (43) and a fuel tank (27), are disposed in the area of a side surface of the engine that is opposite to the direction of displacement of the cylinder axis (L2), some of the engine components such as the camshaft (32) are disposed in the area on a side surface of the engine that complies with the displacement direction of the cylinder axis (L2) with respect to the line (L1) extending in parallel and intersecting the axis of the crankshaft (22) and some of the engine components, in particular the fuel pump (42) are disposed outside of a cylinder block body (17) of the engine.
- Internal combustion engine according to at least one of the preceding claims 1 to 9, wherein the engine forms part of an outboard motor and the crankshaft (22) is disposed substantially vertically.
- Internal combustion engine according to at least one of the preceding claims 1 to 10, wherein mounts (28) are provided to support the engine, said mounts (28) having a vanable wall thickness such that the wall thickness of parts of each of the mounts (28) on the side opposite to the displacement direction of the cylinder axis (L2) is increased compared to the side extending towards the direction of displacement of the cylinder axis (L2).
- Internal combustion engine according to at least one of the preceding claims 1 to 11, wherein a valve drive chamber (35) is formed in a cylinder head (16) and a head cover (15) of the engine wherein the valves (23,24) are driven via a rocker arm mechanism (39) and a lifter (40), said lifter (40) being in contact with an end of the rocker arm (39) through a push rod (41) and, on the other hand, being slidably disposed in the cylinder body (17), is operated by a cam of the camshaft (32) which is in contact with said end of the lifter (40).
- Internal combustion engine according to at least one of the preceding claims 1 to 12, wherein the camshaft (42) is driven from the crankshaft (22) by means of gears (33,34) being in mesh with each other.
- Internal combustion engine according to at least one of the preceding claims 1 to 13, wherein the crankshaft (22) is made of iron-based material while the cylinder can be made of an aluminium based alloy including aluminium.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP28902999 | 1999-10-12 | ||
JP28902999A JP2001107800A (en) | 1999-10-12 | 1999-10-12 | Four cycle engine |
JP29227899A JP2001115932A (en) | 1999-10-14 | 1999-10-14 | Engine structure for outboard motor |
JP29227899 | 1999-10-14 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1092866A2 true EP1092866A2 (en) | 2001-04-18 |
EP1092866A3 EP1092866A3 (en) | 2002-04-17 |
EP1092866B1 EP1092866B1 (en) | 2005-08-10 |
Family
ID=26557427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20000122173 Expired - Lifetime EP1092866B1 (en) | 1999-10-12 | 2000-10-12 | Internal combustion engine |
Country Status (1)
Country | Link |
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EP (1) | EP1092866B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2194262A2 (en) | 2008-12-03 | 2010-06-09 | Yamaha Hatsudoki Kabushiki Kaisha | Outboard motor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4846124A (en) * | 1987-02-03 | 1989-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Engine with a balancer mechanism |
US5031591A (en) * | 1989-01-30 | 1991-07-16 | Honda Giken Kogyo Kabushiki Kaisha | OHC vertical crankshaft engine |
US5049100A (en) * | 1989-04-17 | 1991-09-17 | Honda Giken Kogyo Kabushiki Kaisha | Outboard engine unit |
JPH10238359A (en) * | 1997-02-28 | 1998-09-08 | Kawasaki Heavy Ind Ltd | Small planing boat |
EP0902174A2 (en) * | 1997-09-12 | 1999-03-17 | Honda Giken Kogyo Kabushiki Kaisha | Outboard marine drive powered by an air-cooled internal combustion engine |
-
2000
- 2000-10-12 EP EP20000122173 patent/EP1092866B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4846124A (en) * | 1987-02-03 | 1989-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Engine with a balancer mechanism |
US5031591A (en) * | 1989-01-30 | 1991-07-16 | Honda Giken Kogyo Kabushiki Kaisha | OHC vertical crankshaft engine |
US5049100A (en) * | 1989-04-17 | 1991-09-17 | Honda Giken Kogyo Kabushiki Kaisha | Outboard engine unit |
JPH10238359A (en) * | 1997-02-28 | 1998-09-08 | Kawasaki Heavy Ind Ltd | Small planing boat |
EP0902174A2 (en) * | 1997-09-12 | 1999-03-17 | Honda Giken Kogyo Kabushiki Kaisha | Outboard marine drive powered by an air-cooled internal combustion engine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14, 31 December 1998 (1998-12-31) & JP 10 238359 A (KAWASAKI HEAVY IND LTD), 8 September 1998 (1998-09-08) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2194262A2 (en) | 2008-12-03 | 2010-06-09 | Yamaha Hatsudoki Kabushiki Kaisha | Outboard motor |
US8490594B2 (en) | 2008-12-03 | 2013-07-23 | Yamaha Hatsudoki Kabushiki Kaisha | Outboard motor |
Also Published As
Publication number | Publication date |
---|---|
EP1092866B1 (en) | 2005-08-10 |
EP1092866A3 (en) | 2002-04-17 |
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