EP0802307B1 - Intake valve device for preventing adhesion of deposits - Google Patents
Intake valve device for preventing adhesion of deposits Download PDFInfo
- Publication number
- EP0802307B1 EP0802307B1 EP19960105692 EP96105692A EP0802307B1 EP 0802307 B1 EP0802307 B1 EP 0802307B1 EP 19960105692 EP19960105692 EP 19960105692 EP 96105692 A EP96105692 A EP 96105692A EP 0802307 B1 EP0802307 B1 EP 0802307B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- intake
- groove
- guide
- valve stem
- 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
- 239000010687 lubricating oil Substances 0.000 claims description 19
- 239000000446 fuel Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 5
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000009835 boiling Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 239000013543 active substance Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910003158 γ-Al2O3 Inorganic materials 0.000 description 1
Images
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
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
-
- 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
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
Definitions
- the present invention relates to an intake valve device for preventing adhesion of deposits.
- an intake valve is suggested as mentioned Japanese Patent Laid-Open Pub. No.6-235308, wherein a coating layer which has oxidation catalytic function is formed on the valve head and adjacent area, thereby preventing high boiling point organic substances from adhering on the valve head and adjacent area owing to oxidation catalytic reaction thereof.
- a coating layer which has oxidation catalytic function is formed on the valve head and adjacent area, thereby preventing high boiling point organic substances from adhering on the valve head and adjacent area owing to oxidation catalytic reaction thereof.
- an engine runs for a long time at low load and speed, so that the surface of catalyst is partially covered with high boiling point organic substances in the lubricating oil owing to oil-down until the intake valve becomes reaction temperature of the catalyst, and the catalyst is blocked against air or oxygen.
- oxidization catalytic reaction may not be achieved enough.
- JP-A-5-223041 discloses the features of the first part of claims 1 and 3 and is concerned with increasing the filling efficiency of intake air that flows into a combustion chamber and to atomize the wall film flow of fuel deposited on the valve head.
- this document discloses an intake valve device in which the valve stem is housed within an air nozzle hole trough which assist air is fed to the back of the valve head.
- FR-A-2078676 is concerned with the problem of lubricating the surface of a valve stem and of its bearing guide, avoiding excessive leakage of oil from the guide.
- the solution disclosed is to adopt a double spiral groove: a first groove 22 is wide enough to provide a relatively free passage for the oil and a second groove 24 is smaller and such as to enable building up of carbon deposits within its last two loops in order to block the groove and retain the oil in the groove.
- the same deposits of carbon on the valve head also have the function of limiting the descent of oil from the bigger groove.
- US-A-5,465,691 is concerned with the problem of ensuring that some lubricant is always present on valve stem and guide and yet that the amount of lubricant that finally reaches the combustion chamber is minimal.
- the solution disclosed is to provide the bearing surface of the valve guide with a spiral groove 18 that has a specially shaped cross-section. Groove 18 extends along the bearing part of the valve but it does not extend to the bottom of the valve guide, i.e. to the intake port of the valve device.
- an intake valve device for preventing adhesion of deposits in an internal combustion engine according to claim 1.
- an intake valve device for preventing adhesion of deposits in an internal combustion engine according to claim 3.
- lubricating oil owing to oil-down is guided to the valve head through the annular and elongate grooves or the spiral groove and washed down by fuel injected by the fuel injection means, thereby avoiding the lubricating oil from adhering to the intake valve.
- the first invention is illustrated in Fig. 1, in which the numeral 1 denotes an intake valve which is molded from martensitic heat resisting steels and which comprises a valve stem 1a and and a valve head 1b at the lower end thereof.
- the valve stem 1a of the intake valve 1 is slidably inserted in a cylindrical valve guide 2 which is pressed in a cylinder head 3, and the intake valve 1 is moved up and down by pushing the upper surface of a cylindrical tappet 5 at the upper end of the valve stem 1a by a cam 6.
- 4 denotes a valve spring.
- a lip seal 7 is engaged over the outer circumferential surface of the valve stem 1a, thereby preventing excessive lubricating oil 8 from running into a gap between the valve stem 1a of the intake valve 1 and the valve guide 2.
- an injector 9 for injecting gasoline in vapour is provided in the cylinder head 3, and an injection port 9a is directed to the surface of the valve head 1b in the intake port 10.
- the lower end of the elongate groove 2b opens toward the intake port 10, which is also shown in Figs. 3 and 4.
- the lubricating oil 8 which runs in the gap between the valve stem 1a of the intake valve 1 and the valve guide 2 is temporarily held in the annular groove 2a.
- the lubricating oil 8 in the annular groove 2a runs into the lower end of the valve stem 1a of the intake valve 1 in the intake port 10 and reaches the valve head 1b in the vicinity of the injector 9 via the elongate groove 2a.
- the gasoline 11 is blown to the lower end of the valve stem 1a of the intake valve 1 and the head 1b by the injector 9, so that the lubricating oil 8 which adheres thereon is washed down by the gasoline 11 and sucked into the cylinder 12. Therefore, the lubricating oil 8 hardly adheres on the surface of the intake valve 1 in the intake port 10.
- the annular groove 2a and the elongate groove 2b are both formed on the valve guide 2, but may be formed on the intake valve 1.
- the annular groove 2a may be formed as low as possible. So far as the lubricating oil 8 invaded in the gap between the valve guide and the intake valve 1 is held in the annular groove 2a, the lubricating oil does not reach the contact surface lower than the annular groove 2a. It is for preventing lubrication decrease.
- FIG. 4 An embodiment of the second invention will be illustrated in Fig. 4. Difference between the above and present embodiments is only a groove in the inner circumferential surface of the valve guide 13, and the other illustration will be omitted.
- a spiral groove 14 is formed on the whole inner circumferential surface of the valve guide 13, and an opening 14a at the lower end of the spiral groove 14 communicates with the intake port 10 in the vicinity of the injector 9 similar to the elongate groove 2b in the foregoing embodiment.
- the lubricating oil 8 invaded into a gap between the intake valve 1 and the valve guide 13 runs into the spiral groove 14 and reaches the valve head 1b of the intake valve 1 in the vicinity of the injector 9 similar to the foregoing embodiment.
- the oil 8 which adheres on the valve head 1b is washed down by the gasoline 11 from the injector 9.
- This embodiment achieves similar advantage to the foregoing embodiment, and the spiral groove 14 provides excellent oil-maintenance capability compared with the elongate groove 2b, and increases lubricating properties of contact surfaces of the intake valve 1 and the valve guide 13.
- the spiral groove 14 may be formed from a suitable position on the inner circumferential surface of the valve guide 13 to the lower end of the valve guide 13.
- the spiral groove 14 may be formed on the intake valve 1.
- FIG. 5 Another embodiment of the present invention will be illustrated in Fig. 5, in which a coating layer having oxidation catalytic function is formed on a portion of the intake valve 1 in the intake port 10, i.e. on the lower end of the valve stem 1a and the head 1b on which high boiling point organic substance is likely to adhere.
- the surface of the intake valve 1 is coated with ceramic porous carrier 17 having a limitless number of micropores 16, into which active substances such as Pt, Pd and Rh are dissolved and carried, thereby forming the coating layer 15.
- the porous carrier 17 may be preferably made of oxide ceramics such as Al 2 O 3 , ZrO 2 and cordierite, and may be coated by surface treatment means such as thermal spray and coating.
- the porous carrier 17 comprises two layer structure which comprises treating layer of Al 2 O 3 and wash-coat layer of ⁇ -Al 2 O 3 applied thereon, the surface area of the micropores 16 will become larger, thereby increasing carrying capability of the active substance.
- the high boiling point organic substance included in the lubricating oil 8 which is not washed down by the gasoline 11 and in the lubricating oil 8 which is scattered by up-and-down movement of the intake valve 1 onto the opposite surface of the valve head 1b in the vicinity of the injector 9 is absorbed on the active substance 18 in the coating layer 15.
- the intake valve 1 becomes a predetermined temperature of 200 to 350° C, oxidation catalytic reaction occurs from heated portion, thereby leaving the high boiling point organic substance from the active substance 18 and dispersing it, so that high boiling point organic substance is neither carbonized nor deposited on the surface of the valve head 1b.
- the present invention may be applied to internal combustion engines other than gasoline engine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Description
The present invention relates to an intake valve
device for preventing adhesion of deposits.
In poppet valves in engines of automobiles and
ships, especially, in intake valves which has relatively
low heat load, if high boiling point organic substances in
lubricating oil leaked from a gap between a valve guide
and a valve stem adhere to a valve head and adjacent area,
they will be carbonized at of 200 to 300°C of the intake
valve, gradually aggregated and developed, thereby forming
sludges or bulk of deposits. In the deposits, corrosion
ingredients may be contained, which causes corrosion in
the valve head and adjacent area.
To overcome the disadvantages on the surface of
the valve head and adjacent area, an intake valve is
suggested as mentioned Japanese Patent Laid-Open Pub.
No.6-235308, wherein a coating layer which has oxidation
catalytic function is formed on the valve head and
adjacent area, thereby preventing high boiling point
organic substances from adhering on the valve head and
adjacent area owing to oxidation catalytic reaction
thereof. However, in the intake valve in this
publication, an engine runs for a long time at low load
and speed, so that the surface of catalyst is partially
covered with high boiling point organic substances in the
lubricating oil owing to oil-down until the intake valve
becomes reaction temperature of the catalyst, and the
catalyst is blocked against air or oxygen. Thus,
oxidization catalytic reaction may not be achieved enough.
JP-A-5-223041 discloses the features of the first part of claims 1 and 3 and
is concerned with increasing the filling efficiency of intake
air that flows into a combustion chamber and to atomize the wall film
flow of fuel deposited on the valve head.
To solve this problem, this document discloses an intake valve device in
which the valve stem is housed within an air nozzle hole trough which
assist air is fed to the back of the valve head.
FR-A-2078676 is concerned with the problem of lubricating the surface of
a valve stem and of its bearing guide, avoiding excessive leakage of oil
from the guide. The solution disclosed is to adopt a double spiral groove:
a first groove 22 is wide enough to provide a relatively free passage for
the oil and a second groove 24 is smaller and such as to enable building
up of carbon deposits within its last two loops in order to block the
groove and retain the oil in the groove. The same deposits of carbon on
the valve head also have the function of limiting the descent of oil from
the bigger groove.
US-A-5,465,691 is concerned with the problem of ensuring that some
lubricant is always present on valve stem and guide and yet that the
amount of lubricant that finally reaches the combustion chamber is
minimal. The solution disclosed is to provide the bearing surface of the
valve guide with a spiral groove 18 that has a specially shaped cross-section.
Groove 18 extends along the bearing part of the valve but it
does not extend to the bottom of the valve guide, i.e. to the intake port
of the valve device.
It is an object of
the present invention to provide a valve device in which
oil-down is directed toward a fuel injection device to
prevent deposits from adhering to a valve head and
adjacent area and catalyst surface from being covered by
lubricating oil.
According to one aspect of the present invention,
there is provided an intake valve device for preventing
adhesion of deposits in an internal combustion engine
according to claim 1.
According to another aspect of the present
invention there is provided an intake valve device for
preventing adhesion of deposits in an internal combustion
engine
according to claim 3.
According to the present invention, lubricating
oil owing to oil-down is guided to the valve head through
the annular and elongate grooves or the spiral groove and
washed down by fuel injected by the fuel injection means,
thereby avoiding the lubricating oil from adhering to the
intake valve.
The features and advantages of the invention will
become more apparent from the following description with
respect to embodiments as shown in appended drawings
wherein:
The first invention is illustrated in Fig. 1, in
which the numeral 1 denotes an intake valve which is
molded from martensitic heat resisting steels and which
comprises a valve stem 1a and and a valve head 1b at the
lower end thereof. The valve stem 1a of the intake valve
1 is slidably inserted in a cylindrical valve guide 2
which is pressed in a cylinder head 3, and the intake
valve 1 is moved up and down by pushing the upper surface
of a cylindrical tappet 5 at the upper end of the valve
stem 1a by a cam 6. 4 denotes a valve spring.
At the upper end of the valve guide 2, a lip seal
7 is engaged over the outer circumferential surface of the
valve stem 1a, thereby preventing excessive lubricating
oil 8 from running into a gap between the valve stem 1a of
the intake valve 1 and the valve guide 2.
In the vicinity of the intake valve 1, an injector
9 for injecting gasoline in vapour is provided in the
cylinder head 3, and an injection port 9a is directed to
the surface of the valve head 1b in the intake port 10.
On the surface of the valve guide 2 which contacts the
intake valve 1, there is formed an annular groove 2a and
an elongate groove 2b which communicates with the annular
groove 2a at the upper end and which extends to the lower
end of the valve guide 2. The lower end of the elongate
groove 2b opens toward the intake port 10, which is also
shown in Figs. 3 and 4.
The function of the embodiment as above will be
described. The lubricating oil 8 which runs in the gap
between the valve stem 1a of the intake valve 1 and the
valve guide 2 is temporarily held in the annular groove
2a. The lubricating oil 8 in the annular groove 2a runs
into the lower end of the valve stem 1a of the intake
valve 1 in the intake port 10 and reaches the valve head
1b in the vicinity of the injector 9 via the elongate
groove 2a. The gasoline 11 is blown to the lower end of
the valve stem 1a of the intake valve 1 and the head 1b by
the injector 9, so that the lubricating oil 8 which
adheres thereon is washed down by the gasoline 11 and
sucked into the cylinder 12. Therefore, the lubricating
oil 8 hardly adheres on the surface of the intake valve 1
in the intake port 10.
In the above embodiment, the annular groove 2a and
the elongate groove 2b are both formed on the valve guide
2, but may be formed on the intake valve 1.
Preferably, the annular groove 2a may be formed as
low as possible. So far as the lubricating oil 8 invaded
in the gap between the valve guide and the intake valve 1
is held in the annular groove 2a, the lubricating oil does
not reach the contact surface lower than the annular
groove 2a. It is for preventing lubrication decrease.
An embodiment of the second invention will be
illustrated in Fig. 4. Difference between the above and
present embodiments is only a groove in the inner
circumferential surface of the valve guide 13, and the
other illustration will be omitted. A spiral groove 14 is
formed on the whole inner circumferential surface of the
valve guide 13, and an opening 14a at the lower end of the
spiral groove 14 communicates with the intake port 10 in
the vicinity of the injector 9 similar to the elongate
groove 2b in the foregoing embodiment.
The lubricating oil 8 invaded into a gap between
the intake valve 1 and the valve guide 13 runs into the
spiral groove 14 and reaches the valve head 1b of the
intake valve 1 in the vicinity of the injector 9 similar
to the foregoing embodiment. The oil 8 which adheres on
the valve head 1b is washed down by the gasoline 11 from
the injector 9. This embodiment achieves similar
advantage to the foregoing embodiment, and the spiral
groove 14 provides excellent oil-maintenance capability
compared with the elongate groove 2b, and increases
lubricating properties of contact surfaces of the intake
valve 1 and the valve guide 13.
The spiral groove 14 may be formed from a
suitable position on the inner circumferential surface of
the valve guide 13 to the lower end of the valve guide 13.
The spiral groove 14 may be formed on the intake valve 1.
Another embodiment of the present invention will
be illustrated in Fig. 5, in which a coating layer having
oxidation catalytic function is formed on a portion of the
intake valve 1 in the intake port 10, i.e. on the lower
end of the valve stem 1a and the head 1b on which high
boiling point organic substance is likely to adhere. As
enlarged in Fig. 6, the surface of the intake valve 1 is
coated with ceramic porous carrier 17 having a limitless
number of micropores 16, into which active substances such
as Pt, Pd and Rh are dissolved and carried, thereby
forming the coating layer 15. The porous carrier 17 may
be preferably made of oxide ceramics such as Al2O3, ZrO2
and cordierite, and may be coated by surface treatment
means such as thermal spray and coating. If the surface
of the intake valve 1 is made rough, peeling resistance of
the porous carrier 17 will be increased. If the porous
carrier 17 comprises two layer structure which comprises
treating layer of Al2O3 and wash-coat layer of γ-Al2O3
applied thereon, the surface area of the micropores 16
will become larger, thereby increasing carrying capability
of the active substance.
The high boiling point organic substance included
in the lubricating oil 8 which is not washed down by the
gasoline 11 and in the lubricating oil 8 which is
scattered by up-and-down movement of the intake valve 1
onto the opposite surface of the valve head 1b in the
vicinity of the injector 9 is absorbed on the active
substance 18 in the coating layer 15. When the intake
valve 1 becomes a predetermined temperature of 200 to 350°
C, oxidation catalytic reaction occurs from heated
portion, thereby leaving the high boiling point organic
substance from the active substance 18 and dispersing it,
so that high boiling point organic substance is neither
carbonized nor deposited on the surface of the valve head
1b.
The present invention may be applied to internal
combustion engines other than gasoline engine.
The foregoings merely relate to preferred
embodiments of the invention. Various changes and
modifications may be made by person skilled in the art
without departing from the scope of claims wherein:
Claims (4)
- An intake valve device to prevent adhesion of deposits in an internal combustion engine, comprising:characterised in thatan intake poppet valve (1) which comprises a valve head (1b) and a valve stem (1a);a valve guide (2) in which the valve stem (1a) is slidably inserted;fuel injection means (9) which injects fuel toward the valve head (1b);a contact surface of the valve stem (1a) or the valve guide (2) having groove means, a lower end of the groove means opening toward an intake port in the vicinity of the fuel injection means (9),said groove means consists of an annular groove (2a) and an elongate groove (2b),said elongate groove communicates with said annular groove and opens toward said intake port,said deposits comprise lubricating oil (8), anda lip seal (7) is provided at the upper end of the valve guide (2) to engage the valve stem (1a) thereby preventing excessive lubricating oil (8) from running into a gap between the valve stem and the valve guide.
- An intake valve device as defined in claim 1, wherein the annular groove (2a) is formed at a lower portion at the contact surface of the valve guide (2).
- An intake valve device to prevent adhesion of deposits in an internal combustion engine, comprising:characterised in thatan intake poppet valve (1) which comprises a valve head (1b) and a valve stem (1a);a valve guide (2) in which the valve stem (1a) is slidably inserted;fuel injection means (9) which injects fuel toward the valve head (1b);a contact surface of the valve stem (1a) or the valve guide (2) having groove means, a lower end of the groove means opening toward an intake port in the vicinity of the fuel injection means (9),said groove means is formed as a spiral groove (14),said deposits comprise lubricating oil (8), anda lip seal (7) is provided at the upper end of the valve guide (2) to engage the valve stem (1a) thereby preventing excessive lubricating oil (8) from running into a gap between the valve stem and the valve guide.
- An intake valve device as defined in any preceding claim, wherein a coating layer having an oxidation catalytic function is formed on at least a portion of the intake poppet valve (1), which portion works in the intake port.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1996600412 DE69600412T2 (en) | 1996-04-11 | 1996-04-11 | Inlet valve device for preventing the adherence of deposits |
| ES96105692T ES2118655T3 (en) | 1996-04-11 | 1996-04-11 | ADMISSION VALVE DEVICE TO PREVENT THE ADHESION OF DEPOSITS. |
| EP19960105692 EP0802307B1 (en) | 1996-04-11 | 1996-04-11 | Intake valve device for preventing adhesion of deposits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19960105692 EP0802307B1 (en) | 1996-04-11 | 1996-04-11 | Intake valve device for preventing adhesion of deposits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0802307A1 EP0802307A1 (en) | 1997-10-22 |
| EP0802307B1 true EP0802307B1 (en) | 1998-07-08 |
Family
ID=8222659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19960105692 Expired - Lifetime EP0802307B1 (en) | 1996-04-11 | 1996-04-11 | Intake valve device for preventing adhesion of deposits |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0802307B1 (en) |
| DE (1) | DE69600412T2 (en) |
| ES (1) | ES2118655T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826865B4 (en) * | 1998-06-17 | 2005-04-14 | Audi Ag | Direct injection internal combustion engine |
| DE10117509A1 (en) * | 2001-04-07 | 2002-10-17 | Volkswagen Ag | Internal combustion engine with direct injection |
| DE10358729A1 (en) * | 2003-12-15 | 2005-07-21 | Volkswagen Ag | Gas exchange valve e.g. intake valve, for e.g. petrol engine, has valve stem whose outer surface has anti-adhesive coating so that dirt particles cannot stick to cold surface area of stem and glides towards valve plate |
| EP3464842B1 (en) | 2016-06-02 | 2020-07-15 | Volvo Truck Corporation | Valve arrangement and valve guide |
| US10794334B2 (en) | 2016-06-02 | 2020-10-06 | Volvo Truck Corporation | Valve arrangement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3581728A (en) * | 1970-02-18 | 1971-06-01 | Caterpillar Tractor Co | Grooved valve stem guide |
| JPS59158363A (en) * | 1983-02-28 | 1984-09-07 | Hino Motors Ltd | Fluid supply device to intake and exhaust ports |
| DE3719077A1 (en) * | 1987-06-06 | 1988-12-22 | Daimler Benz Ag | COATED VALVE FOR COMBUSTION ENGINES |
| JPH05223041A (en) * | 1992-02-12 | 1993-08-31 | Nissan Motor Co Ltd | Intake device for internal combustion engine |
| JPH06235308A (en) * | 1993-02-09 | 1994-08-23 | Fuji Oozx Inc | Intake valve for internal combustion engine |
| JP2873990B2 (en) * | 1994-06-01 | 1999-03-24 | 株式会社荒井製作所 | Valve stem sealing device |
| US5465691A (en) * | 1995-03-08 | 1995-11-14 | Capaldo; Richard G. | Valve guide |
-
1996
- 1996-04-11 ES ES96105692T patent/ES2118655T3/en not_active Expired - Lifetime
- 1996-04-11 EP EP19960105692 patent/EP0802307B1/en not_active Expired - Lifetime
- 1996-04-11 DE DE1996600412 patent/DE69600412T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69600412D1 (en) | 1998-08-13 |
| DE69600412T2 (en) | 1998-11-05 |
| EP0802307A1 (en) | 1997-10-22 |
| ES2118655T3 (en) | 1998-09-16 |
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