EP1136673A2 - Druckregelventil für Kühlsysteme - Google Patents
Druckregelventil für Kühlsysteme Download PDFInfo
- Publication number
- EP1136673A2 EP1136673A2 EP01106204A EP01106204A EP1136673A2 EP 1136673 A2 EP1136673 A2 EP 1136673A2 EP 01106204 A EP01106204 A EP 01106204A EP 01106204 A EP01106204 A EP 01106204A EP 1136673 A2 EP1136673 A2 EP 1136673A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- closure member
- seal
- arrangement according
- housing
- cooling system
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 25
- 230000036316 preload Effects 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000418 atomic force spectrum Methods 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 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
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
- F01P11/0204—Filling
- F01P11/0209—Closure caps
- F01P11/0238—Closure caps with overpressure valves or vent valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
- F01P11/0204—Filling
- F01P11/0209—Closure caps
- F01P11/0214—Mounting
- F01P2011/0228—Sealing
Definitions
- the present invention relates to pressure control valve assemblies for the cooling systems of liquid-cooled internal combustion engines. Such arrangements are normal installed in a cover for an expansion tank. At In modern motor vehicles, such expansion tanks are usually found as separate component away from the heat exchanger in an easily accessible location in the engine compartment. In the past, however, such expansion tanks were usually called Radiator top box trained, and therefore such caps are always still often referred to as a radiator cap.
- radiator caps have been based on a version in which a spring-loaded Disc closes an opening at the base of a filler neck so that the disc rises against the spring at a predetermined pressure to the Limit pressure in the cooling system.
- a support plate for the disc contained one so-called vacuum valve to prevent the pressure from falling significantly Atmospheric pressure drops as the cooling system cools down.
- An example of one such a cover is shown in US 2,164,450.
- valve assemblies have long periods of operation can give during which the pressure in the cooling system to the opening pressure of the pressure relief valve may rise, but there is no reason that the washer of the pressure relief valve against the spring preload from its seat takes off because the temperature has not risen enough or there is no need, Drain gas bubbles from the cooling system. As a result, the sealing washer tilts to stick to their seat, and to lift them is a much higher one Pressure required as originally set by the spring preload was.
- the object of the present invention is to provide a valve arrangement, where the tendency of the valve to jam and only when it is raised Reacting to excess pressure is significantly reduced.
- the shape of the seal can be such that the force of the seal against the Closure member and the housing increased with increasing pressure in the cooling system.
- the elastic seal can either from the closure member or from the housing can be worn and a radially inward lip for sealing, depending on, have against the housing or the closure member.
- the closure member can be arranged so that it is on an annular Border directly abuts the annular joint, the seal then radially inward of the annular interface.
- the seal can be carried by the closure member and for example be glued to it.
- the closure member can be hat-shaped and a cylindrical part and one Have outer edge part, the seal on the inside of the cylindrical Partly located at the intersection with the outer edge part. This can then Closure member at the intersection of the cylindrical part and the outer edge part have a part widened outwards.
- the seal can also be one have a triangular cross section.
- the spring preload can expediently by a between the housing and the compression member acting compression spring are provided.
- the closure member can include a check valve as a vacuum valve to ventilate the cooling system.
- a check valve can be a mushroom-shaped valve member with a shaft extending through an opening in the closure member and a head that can seal against the closure member. If the seal is carried by the closure member, the seal can radially after be extended inside to provide a seal for the valve member.
- the seal can be supported by a separate support disc, which is loose in the Housing is arranged.
- a separate support disc which is loose in the Housing is arranged.
- Such a seal can be diamond-shaped or rhombus-shaped Have cross section and in a V-groove on the inner peripheral edge of the Support disc.
- such a seal can be directed inwards Have lips on both their top and bottom where they are seals against the closure member and the housing.
- the pressure control valve arrangement in a sealing cover must be installed.
- an internal combustion engine 11 contains a pump 12, the liquid Coolant (for example a mixture of water and antifreeze) the engine and a flow line 13 to a heat exchanger in the form of a conventional one air-cooled cooler 14 pumps.
- the coolant flows from the cooler 14 to the pump 12 through a return line 15 and a pump flow line 16.
- a Thermostat and bypass valve 17 controls the flow in the return line 15 and in a bypass line 18 such that much of the coolant flow from the engine 11 runs through the bypass line 18 and no flow through the cooler 14 runs until the coolant reaches higher temperatures.
- An expansion tank 21 has a supply line connected to the flow line 13 22 and a return line connected to the pump flow line 16 23 on.
- the expansion tank 21 has a filler neck 24 which is closed by a closure or a filler cap 25, which one in Figure 2 contains pressure control valve assembly 26 shown in detail.
- a radiator 19 for heating the vehicle interior between the flow line 13 and the pump flow line 16 are provided.
- the filler cap 25 contains a closure part 27 with a Internal thread 28 for engagement with a corresponding screw thread on the expansion tank 21 and a valve part 29, which has an annular extension 31 the closure part 27 is fixed, for example by rotary welding or a snap connection. Seals 32 and 33 are for sealing against the Interior of the filler neck 24 is provided.
- the closure part 27 and the valve part 29 form a housing for the pressure control valve arrangement 26.
- the valve part 29 has an inner flange 34, the one on an upper side 35 middle opening 36 forms an annular joint.
- the opening 36 will of a hat-shaped closure member 37 with a cylindrical part 38 and an outer edge part 39 covered.
- the closure member 37 is pre-loaded Compression spring 41 under spring preload so that it is on an annular Interface on the top 35 directly abuts the flange 34.
- Radially inwards an elastic seal 42 is located in this annular interface Rubber or synthetic rubber that is glued to the closure member 37 so that it seals between the closure member and the flange 34. In this condition the seal 42 is compressed so that it is against the flange 34 an elastic reaction load that is significantly lower than the preload from the spring 41.
- the seal 42 has a generally triangular cross section while being along the inner surface of the cylindrical fastener member 38 and a generally triangular cross-section Recess extends through the top 35 of the flange and an outwardly flared part at the interface of the cylindrical part and the outer edge part is limited.
- closure member 37 contains a check valve 45, which is a valve member 46 with a mushroom-shaped head that against the underside of the closure member 37 is spring-loaded and a seal 47 for closing an opening 48 contains.
- liquid coolant circulates through the supply and return lines 22 and 23 through the expansion tank 21.
- the Air warms above the level of the liquid coolant and there is an increase in pressure in the cooling system.
- a force is exerted on the closure member 37, which counteracts the preload of the spring 41, so that the outer edge part 39 at a predetermined pressure from its abutment with the flange 34 lifts off and air or steam via radial passages 51 in the closure part 27 and can escape into the atmosphere in the valve member 29 through the opening 36.
- the maximum pressure in the cooling system is limited and cannot be significantly above the height set by the preload of the spring 41 increases.
- the shape of the seal 42 is such that the force of the seal against the Flange top 35 increases with increasing pressure in the cooling system because of the seal a radially inwardly directed bead 42B in the compressed state forms ( Figure 3). Furthermore, the shape is such that the surface of the seal 42 tends to be pulled off the flange top 35 when that Closure member 37 moves away from flange 34 under cooling system pressure, wherein this also serves to prevent sticking. In addition, the Seal 42 also tends to rub against the flange top 35 and this can also help clean the mating surfaces of the interface hold and continue to prevent sticking.
- the check valve acts 45 as a conventional vacuum valve to prevent the pressure in the Cooling system drops significantly below atmospheric pressure.
- the seal 142 is radial inward lip 142A when unloaded.
- This forms one Part of a cap-shaped membrane 149 made of an elastomeric material with the underside of the closure member 137 is glued.
- This modification serves the membrane 149 also as a seal for the valve member 146 of the check valve 145.
- FIG. 6 shows the seal 242 in the unloaded state, in which it can be seen diamond-shaped or rhombus-shaped cross-section and in a V-groove on the inner peripheral edge the support disc 251 is arranged.
- washers and seals are commercially available as a complete unit and are generally available as Dowty (RTM) washers known.
- FIG. 7 shows an alternative cross section for the seal 242 at 242A Lips turned inward on both the top and bottom 242B.
- the disk 251A has an alternative groove with a U-shaped cross section for the seal 242A.
- the seal 42, 142 could also by the flange 34, 134 are worn.
- the flange top 35 an annular recess for receiving an elastomeric O-ring or a lip seal which or the adjacent surface of the outer edge part 39 touched the closure member, be formed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Check Valves (AREA)
Abstract
Description
- Figur 1
- eine schematische Darstellung des Kühlsystems einer flüssigkeitsgekühlten Brennkraftmaschine, das eine erfindungsgemäße Druckregelventilanordnung enthält;
- Figur 2
- einen Querschnitt durch eine erfindungsgemäße Druckregelventilanordnung, die in einem Verschlussdeckel eines in Figur 1 gezeigten Ausgleichsbehälters angeordnet ist;
- Figur 3
- einen vergrößerten Querschnitt eines Teils der in Figur 2 gezeigten Druckregelventilanordnung;
- Figur 4
- eine ähnliche Ansicht wie Figur 3, die eine erste Modifikation zeigt;
- Figur 5
- eine ähnliche Ansicht wie Figur 3, die eine zweite Modifikation zeigt;
- Figur 6
- eine vergrößerte Ansicht eines Teils von Figur 5; und
- Figur 7
- eine ähnliche Ansicht wie Figur 6, die eine weitere Modifikation zeigt.
Claims (17)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0006621A GB2360512A (en) | 2000-03-20 | 2000-03-20 | Pressure control valve for cooling system |
| GB0006621 | 2000-03-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1136673A2 true EP1136673A2 (de) | 2001-09-26 |
| EP1136673A3 EP1136673A3 (de) | 2003-03-05 |
| EP1136673B1 EP1136673B1 (de) | 2006-05-31 |
Family
ID=9887946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01106204A Expired - Lifetime EP1136673B1 (de) | 2000-03-20 | 2001-03-14 | Druckregelventil für Kühlsysteme |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1136673B1 (de) |
| DE (1) | DE50109913D1 (de) |
| GB (1) | GB2360512A (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2164450A (en) | 1937-12-30 | 1939-07-04 | Gen Motors Corp | Radiator pressure cap |
| GB1534318A (en) | 1976-08-12 | 1978-11-29 | Gen Motors France | Closure caps |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE477590A (de) * | 1945-01-12 | |||
| US2521201A (en) * | 1949-02-23 | 1950-09-05 | Bruce E Clark | Radiator pressure cap |
| US3489170A (en) * | 1966-06-17 | 1970-01-13 | Arthur L Leman | Slush pump valve assembly |
| GB1596533A (en) * | 1977-11-18 | 1981-08-26 | Coca Cola Co | Pressure relief valves |
| DE8901826U1 (de) * | 1988-11-23 | 1989-04-06 | Reutter Metallwarenfabrik GmbH, 71336 Waiblingen | Kühlerstutzen mit Verschlußdeckel |
-
2000
- 2000-03-20 GB GB0006621A patent/GB2360512A/en not_active Withdrawn
-
2001
- 2001-03-14 EP EP01106204A patent/EP1136673B1/de not_active Expired - Lifetime
- 2001-03-14 DE DE50109913T patent/DE50109913D1/de not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2164450A (en) | 1937-12-30 | 1939-07-04 | Gen Motors Corp | Radiator pressure cap |
| GB1534318A (en) | 1976-08-12 | 1978-11-29 | Gen Motors France | Closure caps |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0006621D0 (en) | 2000-05-10 |
| DE50109913D1 (de) | 2006-07-06 |
| GB2360512A (en) | 2001-09-26 |
| EP1136673A3 (de) | 2003-03-05 |
| EP1136673B1 (de) | 2006-05-31 |
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