CN1277654A - Exhaust valve for internal combustion engines - Google Patents
Exhaust valve for internal combustion engines Download PDFInfo
- Publication number
- CN1277654A CN1277654A CN98810576A CN98810576A CN1277654A CN 1277654 A CN1277654 A CN 1277654A CN 98810576 A CN98810576 A CN 98810576A CN 98810576 A CN98810576 A CN 98810576A CN 1277654 A CN1277654 A CN 1277654A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- cooling tube
- valve
- inserting member
- head
- 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.)
- Pending
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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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
- F01L3/16—Cooling of valves by means of a fluid flowing through or along valve, e.g. air
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Details Of Valves (AREA)
Abstract
An exhaust valve for internal combustion engines comprises a cylindrical valve stem (1) with a longitudinal cooling duct (2), and a circular, substantially disc-shaped head (3) securely connected to the valve stem (1), the head (3) having at least one cooling duct (4) which extends from the bottom (5) of the valve stem's cooling duct (2) to an outlet (6) on the head's surface (7), in order to conduct coolant through the valve stem (1), through the head (3) to exhaust gases from the engine. In the valve stem's cooling duct (2) there is inserted a cross section-reducing insert (8).
Description
The present invention relates to the outlet valve of an internal-combustion engine, comprise a cylinder-shaped valve rod, this valve rod has the vertical cooling tube with an inner wall surface; The head that is connected to the roughly dish type on the valve rod securely with a circle, this head (3) has at least one cooling tube that extends from the outlet of bottom on head surface of the cooling tube of valve rod, cooling medium is sent to the waste gas of motor through valve rod, head.
Described such valve in No. the 972301st, Norwegian patent applications, wherein a passage extends through valve rod and valve head, leads to a valve surface part that is connected with the downstream side of valve.
Therefore in order to obtain high efficiency in a motor, valve must can stand high temperature, must selection can stand a valve material of high temperature.In addition, preferably valve is cooled off.For above-mentioned valve, be satisfied to the cooling of valve head, but unsatisfactory to the cooling of valve rod.
A purpose of the present invention provides the valve of mentioning type in a kind of above-mentioned introduction, and wherein the cooling of valve rod is better than the situation of valves known.
Above-mentioned purpose is mentioned in above-mentioned introduction on the valve base plinth of type, realizes by the feature scheme that limits in claims.
Referring now to accompanying drawing this valve is described in more detail, wherein:
Fig. 1 is a longitudinal sectional view by a valve of the present invention;
Fig. 2 is the sectional elevation along the II-II line of Fig. 1;
Fig. 3 is an amplification sectional elevation of an employed valve inserting member in a valve according to the present invention;
Fig. 4 is by the amplification longitudinal sectional view according to the valve head of a valve of the present invention.
Identical reference mark is used for different figure corresponding part or part.
Fig. 1 represents an outlet valve of internal-combustion engine, comprises the head 3 that is connected to the roughly dish type on this valve rod securely of a cylinder-shaped valve rod 1 and a circle.In the time of in valve is used in a combustion engine, head 3 will be brought to a unshowned valve seat and alternately be contacted, and the waste heating of being passed through.According to the design of motor, same waste gas also can be heated to valve rod one more or less degree.
Valve rod 1 has a vertical cooling tube 2, and it is connected to the cooling tube 4 in the head 3 at 5 places, bottom.Cooling tube 4 leads to the outlet 6 on the surface 7 of head.When engine running, normally the cooling medium of air passes the cooling tube arrival outlet 6 in valve rod 1 and the head 3, mixes with the waste gas of motor at this cooling medium.Valve rod and head both are cooled thus.
In the cooling tube 2 of valve rod, insert the inserting member 8 that a cross section reduces according to the present invention.This inserting member impels cooling medium to flow along inserting member with a higher speed, thus the better heat transfer of the cooling medium obtaining from valve rod 1 to the inserting member region.The heat transfer of this improvement is to be assumed to such fact to cause: cooling medium is compared when therefore flowing with low speed with high velocity flow, and cooling medium can a broken more most boundary layer along the wall surface 12 of cooling tube.
Obviously a flow at high speed of cooling medium also can obtain by the amount that increases the cooling medium of supplying with, but this must increase the size of cooling medium conveyance conduit and equipment, a conveying equipment compressor normally wherein, and it carries cooling medium.The increase of cooling medium amount also must increase the size of the output tube of motor.It is undesirable that a size like this increases.Certainly, the cross sectional area of the cooling tube 2 by reducing valve rod also can obtain the increase of cooling medium flow velocity, but this will reduce the area of the wall surface 12 of cooling tube simultaneously, thereby has reduced from the heat transfer of valve rod 1 to cooling medium.Therefore, wish to have the cooling tube of a big cross sectional area.
In a preferred embodiment, referring to Fig. 1, inserting member 8 is provided with in such mode, to such an extent as to its from or roughly extend a length L 1 from the bottom 5 of the cooling tube of valve rod and along valve rod 1, this length L 1 corresponding to the length L 2 of valve rod at least half.In the zone of the waste gas that is exposed to heat most, obtained the improved cooling of valve rod 1 thus.
In another preferred embodiment, inserting member 8 is arranged in such a way, to such an extent as to its from or roughly from the bottom 5 of the cooling tube of valve rod and extend to the almost whole length L 2 of valve rod along valve rod 1.Obtained the improved cooling of whole valve rod 1 thus.
Fig. 2 is the sectional elevation through cooling tube 2 and inserting member 8, it represents another preferred embodiment, wherein inserting member 8 is made up of the solid mid-section section 9 that a vertical centering is provided with, this central part section 9 has the fin 10 that outwards protrudes longitudinally along circumference, thereby is provided for the cannelure 11 of cooling medium between the fin 10 that outwards protrudes.This can impel cooling medium to pass through along the wall surface 12 of cooling tube, is the heat transfer of a higher degree to cooling medium thereby cause from valve rod 1.
In another preferred embodiment, referring to Fig. 2, the cooling tube 2 of valve rod has a circle or polygonal cross section, and meanwhile the central part section 9 of inserting member has a circle or polygonal cross section, and is positioned at the centre of cooling tube 2.Outwards the fin 10 that protrudes radially extends from the wall surface 12 of central part section 9 to cooling tube.Thereby obtain an evenly distribution of groove 11, so cause from the heat transfer uniformly of valve rod 1 to cooling medium along the wall surface 12 of cooling tube.
Fig. 3 represents an embodiment again, and wherein the total quantity of the fin 10 that outwards protrudes is at least 6.Obtain an evenly distribution of cooling medium thus along the wall surface 12 of cooling tube, thereby guarantee from the uniformly transfer heat of valve rod 1 to cooling medium.
In an embodiment again, referring to Fig. 3, outwards the fin 10 that protrudes has a constant thickness t from central part section 9 to cooling tube wall surface 12, promptly on its whole zone, is represented by r1.This brings suitable intensity to inserting member, and meanwhile groove 11 obtains a trapezoidal cross section, and wherein trapezoidal position, maximum limit is against wall surface 12 places of cooling tube, thereby guarantees from the heat transfer of valve rod 1 to the satisfaction of cooling medium.
In a preferred embodiment again, referring to Fig. 3, outwards the fin 10 that protrudes has an extension r1 radially, and it is approximately equal to the radius r 2 of central part section 9.Consequently the trapezoidal cross-section of groove 11 obtains such shape, and this shape can be provided at wishes that cooling medium has and lower flow resistance arranged in higher flow rate, the cooling tube 2 and have one the good heat transfer reasonably to coordinate from valve rod 1 to cooling medium.
Fig. 4 is the longitudinal sectional view that amplifies through valve head, it represents another embodiment, wherein inserting member 8 just in time is inserted into the bottom 5 of valve rod cooling tube 2 downwards, and the part 13 of the bottom 5 of the cooling tube that is positioned at valve rod of inserting member be taper or convergent shape, lead to cooling tube 4 in the valve head 3 to allow cooling medium.This provides the favourable Placement of inserting member 8 in cooling tube 2, because this inserting member can just in time be inserted into the bottom of cooling tube downwards, promptly abuts on the bottom.The other end of inserting member can be connected to the top of valve rod in various manners, for example by inserting an internal piston in welding or the cooling tube 2.This connection is a prior art, therefore will not further describe.
In another preferred embodiment, gently press-fit with one and join (cooperation) inserting member 8 is inserted in cooling tube 2 of valve rods.Having obtained one of inserting member thus simply installs, and meanwhile provide such valve rod, wherein inserting member is statically placed in the cooling tube and is close to its motion and without any the gap, and if gapped words will cause the flow field problem of on inserting member and cooling tube undesirable wearing and tearing and cooling medium.
In conjunction with a certain embodiments the present invention has been described above.But, obviously in the scope of claims, can design modification of the present invention, the for example variation of relevant fin quantity, because can with shown in the fin of quantity be replaced with a bigger or littler quantity, this will cause cooling off the slight variation with flowing state, thereby make the present invention can be applicable to related motor.
Claims (10)
1. the outlet valve used of an internal-combustion engine comprises a cylinder-shaped valve rod (1), and this valve rod has vertical cooling tube (2) of a band inner wall surface (12); The head (3) that is connected to the roughly dish type on the valve rod (1) securely with a circle, this head (3) has the cooling tube (4) of outlet (6) extension of bottom (5) on head surface (7) of at least one cooling tube from valve rod (2), to send cooling medium the waste gas of motor to through valve rod (1), head (3), it is characterized in that: in the cooling tube (2) of valve rod, insert the inserting member (8) that a cross section reduces.
2. outlet valve as claimed in claim 1 is characterized in that: inserting member (8) from or roughly extend a length (L1) from the bottom (5) of the cooling tube of valve rod and along valve rod (1), this length (L1) corresponding to the length (L2) of valve rod at least half.
3. outlet valve as claimed in claim 1 is characterized in that: inserting member 8 from or roughly from the bottom (5) of the cooling tube of valve rod and extend to the almost whole length (L2) of valve rod along valve rod (1).
4. the described outlet valve of one of claim as described above, it is characterized in that: inserting member (8) is made up of a solid mid-section section (9) that is provided with vertically placed in the middle, this central part section (9) has the fin (10) that outwards protrudes longitudinally along circumference, thereby is provided for the cannelure (11) of cooling medium between the fin (10) that outwards protrudes.
5. outlet valve as claimed in claim 1, it is characterized in that: the cooling tube of valve rod (2) has a circle or polygonal cross section, the central part section (9) of inserting member has a circle or polygonal cross section, and the fin (10) that outwards protrudes radially extends from the wall surface (12) of central part section (9) to cooling tube.
6. as claim 4 or 5 described outlet valves, it is characterized in that: outwards the quantity of the fin (10) that protrudes is at least 6.
7. as the described outlet valve of one of claim 4～6, it is characterized in that: outwards the fin (10) that protrudes has a constant thickness (t) from central part section (9) to cooling tube wall surface (12).
8. as the described outlet valve of one of claim 4～7, it is characterized in that: outwards the fin (10) that protrudes has one radially extension (r1), and it is approximately equal to the radius (r2) of central part section (9).
9. the described outlet valve of one of claim as described above, it is characterized in that: inserting member (8) just in time is inserted into the bottom (5) of valve rod cooling tube (2) downwards, and the part (13) of the bottom (5) of the cooling tube that is positioned at valve rod of inserting member be taper or convergent shape, lead to cooling tube (4) in the valve head (3) to allow cooling medium.
10. the described outlet valve of one of claim as described above is characterized in that: with a light force fit inserting member (8) is inserted in the cooling tube (2) of valve rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO973949 | 1997-08-27 | ||
| NO973949A NO306074B1 (en) | 1997-08-27 | 1997-08-27 | Exhaust gas valve for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1277654A true CN1277654A (en) | 2000-12-20 |
Family
ID=19901047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98810576A Pending CN1277654A (en) | 1997-08-27 | 1998-08-26 | Exhaust valve for internal combustion engines |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1023527A1 (en) |
| JP (1) | JP2001516833A (en) |
| KR (1) | KR20010023374A (en) |
| CN (1) | CN1277654A (en) |
| AU (1) | AU9008898A (en) |
| CA (1) | CA2302348A1 (en) |
| NO (1) | NO306074B1 (en) |
| WO (1) | WO1999010630A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378675A (en) * | 2018-02-09 | 2018-08-10 | 九阳股份有限公司 | A kind of cooking machine reducing oil smoke |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10159100B4 (en) * | 2001-12-01 | 2004-09-16 | Man B&W Diesel A/S | reciprocating engine |
| GR20080100222A (en) * | 2008-04-02 | 2009-11-19 | Διονυσιος Χαραλαμπους Χοϊδας | Method and devices of cooling of the environment of an outlet value. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2158654A5 (en) * | 1971-10-27 | 1973-06-15 | Semt | |
| FR2221961A5 (en) * | 1973-03-13 | 1974-10-11 | Etud Machines Thermiques | |
| CH571154A5 (en) * | 1973-10-31 | 1975-12-31 | Sulzer Ag | |
| US4187807A (en) * | 1978-02-22 | 1980-02-12 | Caterpillar Tractor Co. | Cooled engine valve with improved heat transfer |
| DK148122C (en) * | 1982-01-26 | 1985-08-05 | B & W Diesel As | COOLED EXHAUST VALVE FOR A STAMP COMBUSTION ENGINE |
| DE3223920A1 (en) * | 1982-06-26 | 1983-12-29 | Gesenkschmiede Schneider Gmbh, 7080 Aalen | Hollow-forged cooled valve for internal-combustion engines |
| US5458314A (en) * | 1993-04-01 | 1995-10-17 | Eaton Corporation | Temperature control in an ultra light engine valve |
| DE19504239A1 (en) * | 1995-02-09 | 1996-08-14 | Bosch Gmbh Robert | Inlet valve for a combustion chamber of an internal combustion engine |
| NO972301L (en) * | 1996-07-31 | 1998-02-02 | Kvaerner Asa | Exhaust valve for internal combustion engines |
-
1997
- 1997-08-27 NO NO973949A patent/NO306074B1/en unknown
-
1998
- 1998-08-26 CA CA002302348A patent/CA2302348A1/en not_active Abandoned
- 1998-08-26 AU AU90088/98A patent/AU9008898A/en not_active Abandoned
- 1998-08-26 KR KR1020007002013A patent/KR20010023374A/en not_active Application Discontinuation
- 1998-08-26 EP EP98941935A patent/EP1023527A1/en not_active Ceased
- 1998-08-26 CN CN98810576A patent/CN1277654A/en active Pending
- 1998-08-26 JP JP2000507920A patent/JP2001516833A/en not_active Withdrawn
- 1998-08-26 WO PCT/NO1998/000254 patent/WO1999010630A1/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378675A (en) * | 2018-02-09 | 2018-08-10 | 九阳股份有限公司 | A kind of cooking machine reducing oil smoke |
Also Published As
| Publication number | Publication date |
|---|---|
| NO973949D0 (en) | 1997-08-27 |
| JP2001516833A (en) | 2001-10-02 |
| KR20010023374A (en) | 2001-03-26 |
| NO306074B1 (en) | 1999-09-13 |
| NO973949L (en) | 1999-03-01 |
| AU9008898A (en) | 1999-03-16 |
| CA2302348A1 (en) | 1999-03-04 |
| EP1023527A1 (en) | 2000-08-02 |
| WO1999010630A1 (en) | 1999-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |