CA2431931A1 - Method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and throttle valve assembly - Google Patents
Method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and throttle valve assembly Download PDFInfo
- Publication number
- CA2431931A1 CA2431931A1 CA002431931A CA2431931A CA2431931A1 CA 2431931 A1 CA2431931 A1 CA 2431931A1 CA 002431931 A CA002431931 A CA 002431931A CA 2431931 A CA2431931 A CA 2431931A CA 2431931 A1 CA2431931 A1 CA 2431931A1
- Authority
- CA
- Canada
- Prior art keywords
- throttle valve
- valve assembly
- housing
- sealing compound
- sealing
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
- F02D9/1045—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing for sealing of the flow in closed flap position, e.g. the housing forming a valve seat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lift Valve (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention relates to a throttle valve connection (1), in which a liquid sealing mass (7, 8) is exclusively applied to an adjoining zone of a tubular housing (2) and a throttle valve (3), using a cannula (9). The sealing mass (7, 8) reaches the zone between the tubular housing (2) and the throttle valve (3) by capillary force and subsequently hardens. This prevents a wetting of the surface of the throttle valve (3) by the sealing mass (7, 8).
Description
Description Method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and throttle valve assembly The invention relates to a method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and a tubular housing, or housing having a spherical segment, of the throttle valve assembly, said housing having a spherical segment, in which method the throttle valve is brought into a position closing the housing and subsequently sealing compound is introduced into the throttle valve assembly. The invention relates, furthermore, to a throttle valve assembly with a throttle valve pivotably mounted in a tubular housing or housing having a spherical segment and with a sealing compound sealing off the throttle valve with respect to the housing in the closing position.
Throttle valve assemblies of the above type are used in present-day motor vehicles for regulating a combustion air stream of an internal combustion engine. In a method, known from practice, for sealing off a gap between the throttle valve and the housing, a vacuum is generated on that side of the throttle valve which is to be mounted toward the internal combustion engine.
The sealing compound is sprayed into the housing on the other side of the throttle valve. As a result, leakage air, which, in the installed state of the throttle valve assembly, flows past the throttle valve when the latter is in the closing position, can be reduced to a minimum.
The known method has the disadvantage that it requires a very high outlay and that that region of the housing and of the throttle valve which is located upstream of the throttle valve in the direction of flow is covered by sealing compound. Only a small part of the sealing compound therefore arrives at the gap to be sealed off.
The problem on which the invention is based is to develop a method of the type initially mentioned, in such a way that the throttle valve can be sealed off with respect to the housing particularly cost-effectively. Furthermore, a throttle valve assembly sealed off cost-effectively by means of this method is to be provided.
The first-mentioned problem is solved, according to the invention, in that the sealing compound is applied in drop form into regions of the throttle valve and of the housing which abut one another, in a quantity sufficient for conduction by means of the capillary forces.
By virtue of this arrangement, spray mists of the sealing compound in the housing and on the throttle valve are avoided. The sealing compound can be applied exactly to the intended point, for example, by means of a cannula. The entire sealing compound therefore reaches the point to be sealed. Furthermore, the sealing compound can be metered particularly accurately by means of a cannula. Complicated atomization of the sealing compound is not necessary in the method according to the invention.
To assist the capillary forces, as in the known method, an intended pressure difference could be set on both sides of the throttle valve. In this case, however, the throttle valve assembly must be mounted on the internal combustion engine or a suction-extraction device in order to generate the vacuum. Moreover, since the throttle valve is slightly distorted by the vacuum, during the injection of the sealing compound into the housing the vacuum must be set very accurately to the vacuum occurring when the internal combustion engine is idling. The method according to the invention requires a particularly low outlay when the two sides of the throttle valve are brought into pressure equilibrium before the sealing compound is applied.
In what are known as E-gas systems, in which the throttle valve is pivoted by means of an electrically operable servomotor, a blockage of the throttle valve after the curing of the sealing compound can be avoided in a simple way when, after a curing of the sealing compound, current is applied to a servomotor driving the throttle valve and consequently the throttle valve is pivoted.
The second-mentioned problem, to be precise the provision of a throttle valve assembly sealed off cost-effectively by means of the method, is solved, according to the invention, in that the sealing compound is disposed solely in a gap between the throttle valve and the housing.
By virtue of this arrangement, only a particularly small quantity of sealing agent is necessary, since the throttle valve itself and part of the housing are not covered by sealing agent. The throttle valve assembly according to the invention thereby has a particularly cost-effective design. A further advantage of the invention is that a spherical segment is not contaminated by the sealing compound.
The invention permits numerous embodiments. To make its basic principle even clearer, two of these are illustrated in the drawing and are described below. In the drawing:
fig. 1 shows a sectional illustration through a throttle valve assembly in the region of a throttle valve shaft, fig. 2 shows a sectional illustration through the throttle valve assembly from figure 1 along the line II-II, fig. 3 shows a sectional illustration through a further embodiment of the throttle valve assembly in the region of the throttle valve, fig. 4 shows a sectional illustration through the throttle valve assembly from figure 3 along the line IV-IV.
Parts corresponding to one another are given the same reference symbols in all the figures.
Figure 1 shows a throttle valve assembly 1 with a tubular housing 2 and with a throttle valve 3 pivotably mounted in the latter. The throttle valve 3 is fastened on a throttle valve shaft 4 mounted in the tubular housing 2. The tubular housing 2 has mountings 5, 6 for the throttle valve shaft 4. The throttle valve assembly 1 illustrated is in the closing position, in which the throttle valve 3 closes the tubular housing 2.
Figure 2 shows the throttle valve assembly 1 from figure 1 in a sectional illustration along the line II-II. In the lower half of the throttle valve assembly 1, it is illustrated that the throttle valve 3 is sealed off with respect to the wall of the tubular housing 2 by means of a sealing compound 7. The sealing compound 7 is cured. In the event of a pivoting of the throttle valve 3, the sealing compound 7 remains on the tubular housing 2. The upper half shows the throttle valve assembly 1 during the application of liquid 5 sealing compound 8 into the regions of the tubular housing 2 and of the throttle valve 3 which are adjacent to one another. The sealing compound 8 is applied in drop form by means of a cannula 9 and is transported into the gap between the tubular housing 2 and the throttle valve 3 by means of the capillary forces. The sealing compound 8 can subsequently cure.
The sealing compound 7, 8 may be, for example, a slip lacquer which cures after the volatilization of the solvent and contains, for example, molybdenum sulfide or polytetrafluoroethylene. The slip lacquer may selectively cure or be baked at room temperature.
Figure 3 shows a further embodiment of the throttle valve assembly 1. This differs from that from figure 1 in that the throttle valve 3 is adjustable by an electrically drivable servomotor 10.
As figure 4 shows in a sectional illustration through the throttle valve assembly 1 from figure 3 along the line IV-IV during the application of the sealing compound 7, 8, the housing 3 has, near the throttle valve 3, two spherical segments 11 located opposite one another. These spherical segments 11 allow a particularly good meterability of the air throughput through the housing 2 in the case of small opening angles of the throttle valve 3. The introduction of the sealing compound 7, 8 takes place as in the throttle valve assembly 1 described in figures 1 and 2. Here, however, after the curing of the sealing compound 7, 8, current can be applied to the servomotor 10 and the throttle valve 3 be pivoted.
Throttle valve assemblies of the above type are used in present-day motor vehicles for regulating a combustion air stream of an internal combustion engine. In a method, known from practice, for sealing off a gap between the throttle valve and the housing, a vacuum is generated on that side of the throttle valve which is to be mounted toward the internal combustion engine.
The sealing compound is sprayed into the housing on the other side of the throttle valve. As a result, leakage air, which, in the installed state of the throttle valve assembly, flows past the throttle valve when the latter is in the closing position, can be reduced to a minimum.
The known method has the disadvantage that it requires a very high outlay and that that region of the housing and of the throttle valve which is located upstream of the throttle valve in the direction of flow is covered by sealing compound. Only a small part of the sealing compound therefore arrives at the gap to be sealed off.
The problem on which the invention is based is to develop a method of the type initially mentioned, in such a way that the throttle valve can be sealed off with respect to the housing particularly cost-effectively. Furthermore, a throttle valve assembly sealed off cost-effectively by means of this method is to be provided.
The first-mentioned problem is solved, according to the invention, in that the sealing compound is applied in drop form into regions of the throttle valve and of the housing which abut one another, in a quantity sufficient for conduction by means of the capillary forces.
By virtue of this arrangement, spray mists of the sealing compound in the housing and on the throttle valve are avoided. The sealing compound can be applied exactly to the intended point, for example, by means of a cannula. The entire sealing compound therefore reaches the point to be sealed. Furthermore, the sealing compound can be metered particularly accurately by means of a cannula. Complicated atomization of the sealing compound is not necessary in the method according to the invention.
To assist the capillary forces, as in the known method, an intended pressure difference could be set on both sides of the throttle valve. In this case, however, the throttle valve assembly must be mounted on the internal combustion engine or a suction-extraction device in order to generate the vacuum. Moreover, since the throttle valve is slightly distorted by the vacuum, during the injection of the sealing compound into the housing the vacuum must be set very accurately to the vacuum occurring when the internal combustion engine is idling. The method according to the invention requires a particularly low outlay when the two sides of the throttle valve are brought into pressure equilibrium before the sealing compound is applied.
In what are known as E-gas systems, in which the throttle valve is pivoted by means of an electrically operable servomotor, a blockage of the throttle valve after the curing of the sealing compound can be avoided in a simple way when, after a curing of the sealing compound, current is applied to a servomotor driving the throttle valve and consequently the throttle valve is pivoted.
The second-mentioned problem, to be precise the provision of a throttle valve assembly sealed off cost-effectively by means of the method, is solved, according to the invention, in that the sealing compound is disposed solely in a gap between the throttle valve and the housing.
By virtue of this arrangement, only a particularly small quantity of sealing agent is necessary, since the throttle valve itself and part of the housing are not covered by sealing agent. The throttle valve assembly according to the invention thereby has a particularly cost-effective design. A further advantage of the invention is that a spherical segment is not contaminated by the sealing compound.
The invention permits numerous embodiments. To make its basic principle even clearer, two of these are illustrated in the drawing and are described below. In the drawing:
fig. 1 shows a sectional illustration through a throttle valve assembly in the region of a throttle valve shaft, fig. 2 shows a sectional illustration through the throttle valve assembly from figure 1 along the line II-II, fig. 3 shows a sectional illustration through a further embodiment of the throttle valve assembly in the region of the throttle valve, fig. 4 shows a sectional illustration through the throttle valve assembly from figure 3 along the line IV-IV.
Parts corresponding to one another are given the same reference symbols in all the figures.
Figure 1 shows a throttle valve assembly 1 with a tubular housing 2 and with a throttle valve 3 pivotably mounted in the latter. The throttle valve 3 is fastened on a throttle valve shaft 4 mounted in the tubular housing 2. The tubular housing 2 has mountings 5, 6 for the throttle valve shaft 4. The throttle valve assembly 1 illustrated is in the closing position, in which the throttle valve 3 closes the tubular housing 2.
Figure 2 shows the throttle valve assembly 1 from figure 1 in a sectional illustration along the line II-II. In the lower half of the throttle valve assembly 1, it is illustrated that the throttle valve 3 is sealed off with respect to the wall of the tubular housing 2 by means of a sealing compound 7. The sealing compound 7 is cured. In the event of a pivoting of the throttle valve 3, the sealing compound 7 remains on the tubular housing 2. The upper half shows the throttle valve assembly 1 during the application of liquid 5 sealing compound 8 into the regions of the tubular housing 2 and of the throttle valve 3 which are adjacent to one another. The sealing compound 8 is applied in drop form by means of a cannula 9 and is transported into the gap between the tubular housing 2 and the throttle valve 3 by means of the capillary forces. The sealing compound 8 can subsequently cure.
The sealing compound 7, 8 may be, for example, a slip lacquer which cures after the volatilization of the solvent and contains, for example, molybdenum sulfide or polytetrafluoroethylene. The slip lacquer may selectively cure or be baked at room temperature.
Figure 3 shows a further embodiment of the throttle valve assembly 1. This differs from that from figure 1 in that the throttle valve 3 is adjustable by an electrically drivable servomotor 10.
As figure 4 shows in a sectional illustration through the throttle valve assembly 1 from figure 3 along the line IV-IV during the application of the sealing compound 7, 8, the housing 3 has, near the throttle valve 3, two spherical segments 11 located opposite one another. These spherical segments 11 allow a particularly good meterability of the air throughput through the housing 2 in the case of small opening angles of the throttle valve 3. The introduction of the sealing compound 7, 8 takes place as in the throttle valve assembly 1 described in figures 1 and 2. Here, however, after the curing of the sealing compound 7, 8, current can be applied to the servomotor 10 and the throttle valve 3 be pivoted.
Claims (2)
1. A method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and a housing of the throttle valve assembly, in which method the throttle valve is brought into a position closing the housing and subsequently sealing compound is introduced into the throttle valve assembly, the sealing compound being applied in drop form into regions of the throttle valve and of the housing which abut one another, in a quantity sufficient for distribution by means of the capillary forces, characterized in that the sealing compound is applied to at least one half of the throttle valve from that side of the throttle valve which faces away from a spherical segment.
2. A throttle valve assembly with a throttle valve pivotably mounted in a tubular housing or housing having a spherical segment and with a sealing compound sealing off the throttle valve with respect to the housing in the closing position, the sealing compound being disposed solely in a gap between the throttle valve and the housing, characterized in that the sealing compound (7, 8) is a slip lacquer containing molybdenum sulfide or polytetrafluoroethylene.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10062447.2 | 2000-12-14 | ||
| DE10062447 | 2000-12-14 | ||
| DE10123490.2 | 2001-05-15 | ||
| DE10123490A DE10123490A1 (en) | 2000-12-14 | 2001-05-15 | Method for sealing a gap between a throttle valve pivotally mounted in a throttle valve body and throttle valve body |
| PCT/DE2001/004667 WO2002048586A2 (en) | 2000-12-14 | 2001-12-12 | Method for sealing a gap between a throttle valve that is pivotally mounted in a throttle valve connection and said connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2431931A1 true CA2431931A1 (en) | 2002-06-20 |
Family
ID=26007964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002431931A Abandoned CA2431931A1 (en) | 2000-12-14 | 2001-12-12 | Method for sealing off a gap between a throttle valve pivotably mounted in a throttle valve assembly and throttle valve assembly |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1342027B1 (en) |
| BR (1) | BR0116214A (en) |
| CA (1) | CA2431931A1 (en) |
| DE (1) | DE50111424D1 (en) |
| WO (1) | WO2002048586A2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10237864A1 (en) * | 2002-08-19 | 2004-03-04 | Siemens Ag | Method of closing a throttle body |
| DE10240624A1 (en) * | 2002-09-03 | 2004-03-11 | Siemens Ag | Method of completing a throttle body |
| DE102004003464A1 (en) * | 2004-01-22 | 2005-08-11 | Robert Bosch Gmbh | Method for producing a throttle valve unit with increased tightness |
| GB201200845D0 (en) * | 2012-01-19 | 2012-02-29 | Rolls Royce Plc | Method of sealing cooling holes |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3243996C1 (en) * | 1982-11-27 | 1984-05-24 | Daimler-Benz Ag, 7000 Stuttgart | Method for applying a polymer coating in the intake system of an internal combustion engine |
| DE4027371A1 (en) * | 1990-08-30 | 1992-03-12 | Freudenberg Carl Fa | Butterfly type valve for perfect seal - has gap between valve plate and pipe wall filled with polymer coating on pipe with high content of glass microspheres |
| JPH0814069A (en) * | 1994-06-29 | 1996-01-16 | Nippondenso Co Ltd | Intake device for internal combustion engine |
| JP3192355B2 (en) * | 1995-09-20 | 2001-07-23 | 株式会社日立製作所 | Intake control device for internal combustion engine |
| US5640942A (en) * | 1996-01-16 | 1997-06-24 | Ford Motor Company | Ultraviolet cured throttle bore pre-coating |
| DE19703296A1 (en) * | 1997-01-30 | 1998-08-06 | Mannesmann Vdo Ag | Method of sealing a throttle valve shaft carrying a throttle valve and throttle valve body |
-
2001
- 2001-12-12 EP EP01984698A patent/EP1342027B1/en not_active Revoked
- 2001-12-12 BR BR0116214-4A patent/BR0116214A/en not_active IP Right Cessation
- 2001-12-12 DE DE50111424T patent/DE50111424D1/en not_active Revoked
- 2001-12-12 WO PCT/DE2001/004667 patent/WO2002048586A2/en active IP Right Grant
- 2001-12-12 CA CA002431931A patent/CA2431931A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1342027B1 (en) | 2006-11-08 |
| DE50111424D1 (en) | 2006-12-21 |
| EP1342027A2 (en) | 2003-09-10 |
| WO2002048586A2 (en) | 2002-06-20 |
| BR0116214A (en) | 2003-12-30 |
| WO2002048586A3 (en) | 2002-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |