EP3094832A1 - Internal combustion engine comprising cam lubrication troughs - Google Patents
Internal combustion engine comprising cam lubrication troughsInfo
- Publication number
- EP3094832A1 EP3094832A1 EP15702536.2A EP15702536A EP3094832A1 EP 3094832 A1 EP3094832 A1 EP 3094832A1 EP 15702536 A EP15702536 A EP 15702536A EP 3094832 A1 EP3094832 A1 EP 3094832A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- bucket
- combustion engine
- cylinder head
- 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 8
- 238000005461 lubrication Methods 0.000 title claims abstract description 8
- 230000000295 complement effect Effects 0.000 claims description 10
- 238000004880 explosion Methods 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 230000005587 bubbling Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
-
- 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
- F02B75/005—Other engines having horizontal cylinders
Definitions
- the present invention relates to the field of explosion engines, and more particularly to engines whose cylinders are horizontal or inclined in the horizontal plane.
- the cylinder head is the upper part, most often removable, a reciprocating piston engine. She closes the top of the cylinders. On some engines, the intake and exhaust valves are housed. Its shape and characteristics are always closely linked to the evolution of the engines and are more particularly determined according to the type of distribution and the shape of the combustion chamber.
- the Japanese patent application JP 2002 021989 describes an explosion engine whose cylinder head has buckets for lubricating the cams. These buckets are delimited by the breech and the cylinder head cover.
- DE 102008014828 discloses a flat motor comprising a grease return system.
- the cam is greased by projection or bubbling.
- the problem of the prior art is that during the start and the first cam, the cam comes into contact with the pusher before being properly greased. This problem is particularly important for engines with a cylinder head that is horizontal or inclined below the horizontal plane (“head down").
- the present invention relates, according to its most general meaning, to an explosion engine comprising at least one yoke inclined with respect to a horizontal plane and a distribution system by a camshaft in the yoke greased by a system.
- greasing device characterized in that the lubrication of each cam is made by a bucket placed under the cam to form a local tank in which a portion of the cam is immersed, the volume of said bucket being determined by two lateral faces, and a bottom, and whose edge of at least one of the lateral faces determines a level ensuring that the top of the cam plunges.
- each bucket is bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X ° corresponding to the inclination of a cylinder of the engine, X corresponding to the angle inclination of the cylinder head.
- the engine is a two-cylinder engine comprising two opposite identical yokes, the axis of the cylinders forming an angle of -X ° and + X ° respectively with respect to a horizontal plane and in that said buckets are formed of two parts extending respectively half a bearing and the cylinder head, each bucket being bordered laterally by two complementary lateral edges respectively forming an angle of -X ° and + X °.
- the engine comprises two opposite identical yokes and in that said buckets are formed of two parts respectively extending the half-bearing and the yoke.
- bucket in the sense of this patent means a shell whose volume is determined by two lateral faces whose spacing is between 1.1 and 3 times the thickness of the cam, and a bottom, and whose edge at least one of the lateral faces determines a level ensuring that the top of the cam is immersed in the volume thus determined.
- the position of the bucket relative to the cam is determined to ensure lubrication of the top of the cam without the base diameter of the cam enters the oil contained in the bucket.
- the rolls have an inclination of 25 °.
- each bucket is formed of two complementary parts.
- each bucket is bordered laterally by two segments forming respectively an angle of -X ° and + X ° corresponding to the inclination of the cylinder, X corresponding to the angle of inclination of the cylinder, between 0 and 45 °.
- FIG. 1 represents a three-quarter front view of a cylinder head without a cylinder head cover
- FIG. 2 and 3 show detailed views in profile of the buckets respectively of the front yoke and the rear cylinder head of a twin cylinder engine inclined in the longitudinal direction.
- the invention is described with reference to a flat two-cylinder engine having an inclination of 25 °, in the longitudinal direction of the vehicle, in this case a motorcycle.
- the front cylinder is inclined at -25 °, its head down, and the rear cylinder is inclined + 25 °, its head up.
- the two yokes (1, 2) are strictly identical and simply returned, and not symmetrical with respect to the transverse median plane. This reduces the number of parts.
- the distribution is ensured by an intake camshaft (3) and an exhaust camshaft (4) controlling the cams (5, 6, 7, 8) actuating pushers (9, 10; 11, 12) in known manner.
- cam shafts are guided in rotation by bearings formed by semi-cylindrical recesses formed on the cylinder head and complementary semi-cylindrical recesses formed on the upper half-bearing (13).
- the half-bearing (13) is constituted by a foundry piece matched with the cylinder head (1) and machined simultaneously. Its positioning is ensured by cylindrical centering sleeves.
- the half-bearing (13) is fixed on the cylinder head by screws (14 to 22).
- the half-bearing (13) further comprises in its center a borehole (23) to allow access to the candle. It comprises a fixing zone (24) for fixing a chain shoe.
- Each bucket (25 to 28) is formed of two complementary parts. Each bucket (25 to 28) is laterally bordered by two segments respectively forming an angle of -25 ° and + 25 ° corresponding to the inclination of the cylinder.
- the angle of 25 ° is mentioned by way of example, but does not constitute a limitation.
- the inclination can go up to 45 ° and be at least 0 °, for horizontal cylinders.
- One of said portions of the bucket is constituted by an extension of the half-bearing (13), the other of said parts of 1 bucket is constituted by an extension of the yoke (1).
- the lateral edge of the part prolonging the half-bearing forms an angle of 25 °;
- the lateral edge of the part extending the bolt forms an angle of -25 °.
- This configuration makes the cylinder heads completely identical while ensuring that the lubrication adjustment is correct for both the cams in the cylinder head and for the cams in the cylinder head. low. In one case, it will be one of the side edges that will adjust the height of the oil level, and in the other case it will be the additional side edge that will adjust the height of the oil level. oil, as shown in Figures 2 and 3.
- the oil level (32, 33) of the front yoke (1) is adjusted by the edge (34, 35) corresponding to the portion of the bucket extending the half-bearing (13). In the complementary part, the oil is retained by the side of the bucket.
- the oil level (36, 37) of the rear yoke is adjusted by the edge (38, 39) corresponding to the portion of the trough extending the cylinder head (2).
- the oil is retained by the side of the bucket, on the part extending the half-bearing.
- the position of the bucket relative to the cam is determined to ensure lubrication of the top (30) of the cam without the base diameter (31) of the cam enters the oil contained in the bucket.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1450242A FR3016409B1 (en) | 2014-01-13 | 2014-01-13 | EXPLOSION ENGINE COMPRISING CAM LUBRICATION AUGETS |
PCT/FR2015/050030 WO2015104499A1 (en) | 2014-01-13 | 2015-01-08 | Internal combustion engine comprising cam lubrication troughs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3094832A1 true EP3094832A1 (en) | 2016-11-23 |
EP3094832B1 EP3094832B1 (en) | 2017-11-29 |
Family
ID=50780638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15702536.2A Active EP3094832B1 (en) | 2014-01-13 | 2015-01-08 | Internal combustion engine with cam lubrication oil wells |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3094832B1 (en) |
JP (1) | JP6484837B2 (en) |
CN (1) | CN106030055A (en) |
FR (1) | FR3016409B1 (en) |
WO (1) | WO2015104499A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE443021B (en) * | 1979-09-03 | 1986-02-10 | Yanmar Diesel Engine Co | FORBRENNINGSMOTOR |
JPS59226217A (en) * | 1983-06-07 | 1984-12-19 | Honda Motor Co Ltd | Lubricating device of valve mechanism in internal- combustion engine |
JP2911463B2 (en) * | 1988-12-09 | 1999-06-23 | ヤマハ発動機株式会社 | Lubrication structure of valve train |
JPH04107427U (en) * | 1991-02-28 | 1992-09-17 | 富士重工業株式会社 | Cam lubrication system for horizontal DOHC engine |
JPH04116613U (en) * | 1991-03-28 | 1992-10-19 | ダイハツ工業株式会社 | engine lubrication system |
JP3235159B2 (en) * | 1992-01-31 | 2001-12-04 | いすゞ自動車株式会社 | Lubrication system for V-type OHV engine |
JPH074806U (en) * | 1993-06-24 | 1995-01-24 | 富士重工業株式会社 | Direct acting valve mechanism |
DE19630192C2 (en) * | 1996-07-26 | 1998-05-28 | Porsche Ag | Cylinder head arrangement of an internal combustion engine |
JP2002021989A (en) * | 2000-07-05 | 2002-01-23 | Yamaha Motor Co Ltd | Cooling apparatus of engine for motorcycle |
ES2278660T3 (en) * | 2000-07-05 | 2007-08-16 | Yamaha Hatsudoki Kabushiki Kaisha | A MOTORCYCLE, ESPECIALLY A SCOOTER TYPE MOTORCYCLE. |
DE102008014828A1 (en) * | 2008-03-18 | 2009-09-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Internal combustion engine |
JP5135052B2 (en) * | 2008-05-08 | 2013-01-30 | ヤマハ発動機株式会社 | Engine and scooter type motorcycles |
CN202970848U (en) * | 2012-12-10 | 2013-06-05 | 李斯特技术中心(上海)有限公司 | Oil baffle plate for preventing lubricating oil of camshaft and valve mechanism from splashing to oil-gas separator |
-
2014
- 2014-01-13 FR FR1450242A patent/FR3016409B1/en not_active Expired - Fee Related
-
2015
- 2015-01-08 WO PCT/FR2015/050030 patent/WO2015104499A1/en active Application Filing
- 2015-01-08 CN CN201580008799.1A patent/CN106030055A/en active Pending
- 2015-01-08 EP EP15702536.2A patent/EP3094832B1/en active Active
- 2015-01-08 JP JP2016563267A patent/JP6484837B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2015104499A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015104499A1 (en) | 2015-07-16 |
FR3016409A1 (en) | 2015-07-17 |
EP3094832B1 (en) | 2017-11-29 |
JP6484837B2 (en) | 2019-03-20 |
FR3016409B1 (en) | 2018-11-16 |
CN106030055A (en) | 2016-10-12 |
JP2017502212A (en) | 2017-01-19 |
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