WO2003014546A1 - Slow release inhibitor-generating device for an ic engine - Google Patents
Slow release inhibitor-generating device for an ic engine Download PDFInfo
- Publication number
- WO2003014546A1 WO2003014546A1 PCT/AU2002/001044 AU0201044W WO03014546A1 WO 2003014546 A1 WO2003014546 A1 WO 2003014546A1 AU 0201044 W AU0201044 W AU 0201044W WO 03014546 A1 WO03014546 A1 WO 03014546A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inhibitor
- pellet
- slow release
- generating device
- perforated chamber
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
-
- 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
- F01P11/06—Cleaning; Combating corrosion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/54—Disc armature motors or generators
-
- 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
- F01P11/06—Cleaning; Combating corrosion
- F01P2011/066—Combating corrosion
- F01P2011/068—Combating corrosion chemically
Definitions
- the present invention relates to a slow release inhibitor-generating device for an internal combustion (IC) engine.
- the inhibitor-generating device obviates the need to remove inhibitor liquid from the engine at regular services intervals.
- the device is installed in an IC engine having pure (de-mineralised) water in its cooling system.
- the inhibitor-generating device is of the inline type, being installed into a main coolant hose of the cooling system of an IC engine.
- the device includes a bypass chamber to reduce the chances of blockage of the device by detritus material entrained in the inhibitor.
- the device has a slow release table that releases a concentrated inhibitor into the water over a period of typically about 6 months or 10.000 kilometres thus maintaining relatively high concentrations of inhibitor in the cooling system and hence maintaining relatively high levels of protections to the IC engine.
- inhibitor in IC engines must be removed and replaced at regular service intervals. In petrol engines this is typically required every 1 to 2 years. In heavy-duty diesel engines this can be as often as every month or every 20.000 kms.
- the ethylene glycol and triethanol amine used as major components of inhibitors are toxic substances and many authorities now require the disposal of spent inhibitor in proper facilities. Otherwise the ethylene glycol and triethanol amine damage the environment and poses a threat to anyone who comes into contact with it. This increases the cost of replacing the inhibitor and creates a problem with the handling and disposal the inhibitor.
- inhibitor filters are typically spin-on devices that act as a bypass filter.
- the bypass filter is capable of treating substantially all of the inhibitor liquid once for every 16 to 20 volumes of inhibitor pumped through the cooling system.
- Such filters are a disposable item and often contain some kind of slow release additive either in liquid, powder or pellet form. Special devices are provided to ensure that there is slow release of the additives into the main coolant system - say over a period of hours in some cases, and up to about a year in other cases.
- the advantage of these filters is that the period between replacement of the inhibitor in the engine is greatly increased and in some cases it is not necessary to every replace the liquid in the cooling system - as in Penray ' s ® Fill-For-Life® coolant program.
- the Fill-For-Life® program requires a phase were a special cleaning filter is applied to the IC engine to clean out any detritus material that could otherwise cause blocking of the spin- on bypass filter.
- These coolant filters mechanically filter the engine inhibitor through a fine paper filter element to remove impurities, such as sand and rust particles suspended in the cooling system.
- spin-on filters A common disadvantage to most of these spin-on filters is that they cannot be retrofitted to an engine that has been in use because the inhibitors released from the filters cannot dissolve corrosion products or gels that have already formed. Therefore, these spin-on filters can only be used on engines with special facility to receive them and must be installed at the point of manufacture of the engine. Also, these filters are not intended to replace the function of a inhibitor, they simply augment the inhibitor by adding extra inhibitors that extend the life of the inhibitor and in most cases reduce the time before which the inhibitor must be dumped from the engine and new inhibitor added. Further, these filters are solely used in diesel engines and are not intended for use in petrol engines. Still further, these filters must be thrown away once their internal inhibitor supplementing function is exhausted. ⁇ ere have also been some attempts to provide cooling systems with in-line filters for removing tritus material and thereby cleaning the cooling system for reducing the likelihood of blockage the radiator of the cooling system. Typical examples of this kind of filter are shown in
- EP0080541. which has a V-shaped sheet mesh.
- a disadvantage of this filter is that the filter must be cleaned out at very regular intervals to prevent clogging of the mesh, which would then lead to blocking of the cooling system. In some cases the filter must be unblocked every few hundred kilometres.
- a slow release inhibitor- generating device for releasing inhibitor into the cooling system of an IC engine
- the slow release inhibitor-generating device including a housing having an inlet and an outlet, means to couple the inlet and the outlet to the said cooling system, a perforated chamber located within the housing and in fluidic communication with the inlet and the outlet, a bypass chamber located within the housing allowing fluid to bypass the perforated chamber, a pellet including inhibitor agent shaped for location within the perforated chamber for slowly releasing inhibitor into the cooling system, and means located in the housing for allowing the pellet to be inserted into the perforated chamber.
- a pellet for use in a slow release inhibitor-generating device including a housing having an inlet and an outlet, means to couple the inlet and the outlet to a cooling system of an IC engine, a perforated chamber located within the housing and in fluidic communication with the inlet and the outlet, a bypass chamber located within the housing allowing fluid to bypass the perforated chamber, and means located in the housing for allowing the pellet to be inserted into the perforated chamber for releasing inhibitor into the cooling system, the pellet including one or more inhibitor agents and one or more binding agents, the inhibitor agents being concentrated and the binding agents allowing slow dissolution of the inhibitor agents into liquid in the cooling system of the IC engine over the normal service interval of the IC engine.
- slowly in connection with the releasing of the inhibitor into the cooling system means over a period of at least several months (such as about 6 months) up to about 10,000 kms in vehicle based IC engines, and up to about 300 hours of operation in tionary IC engines. That is, the inhibitor is released over a period that is similar in duration to ? normal service interval of the IC engine.
- the slow release inhibitor-generating device is mounted in a fluid hose of the cooling system as an in-line filter.
- Figure 1 is a perspective view, seen from above, of a slow release inhibitor-generating device for an IC engine
- Figure 2 is an end view of the slow release inhibitor-generating device of Figure 1, showing a perforated chamber and a bypass chamber;
- Figures 3 and 4 are a side and plan view respectively of the slow release inhibitor-generating device of Figure 1 ;
- Figure 5 is a cross-sectional side view of the slow release inhibitor-generating device of Figure 4 taken on lines AA;
- Figure 6 is an exploded perspective view, seen from above, of the slow release inhibitor- generating device of Figure 1 ; and.
- Figure 7 is a schematic side view of an IC engine including a cooling system fitted with the device of Figure 1.
- the device 10 has a housing 12, a perforated chamber 14 rotationally mounted in the housing 12. and an inhibitor pellet 16 located in the perforated chamber 14.
- e housing 12 includes an inlet port 20 and an outlet port 22 for connection into a hose 23 (as >wn in Figure 7) of the cooling system 10a.
- the ports 20 and 22 each have an annular lip 24 linst which two of the ends of the hose 23 can be clamped in known manner. Alternatively barbs or the like could be formed into the outer circumferential surface of the ports 20 and 22 to retain the hose 23.
- the housing 12 is made from plastics materials, which are resistant to temperatures below about 200 °C, more preferably to temperatures below 400 °C. It is also preferred that the material be resistant to attack or deterioration from contact with petrol, diesel and other oils, as well as radiator inhibitor.
- the housing 12 could be made from glass filled nylon. It i to be noted that some plastics materials are not suitable because they become brittle or warp or the like in the environment of the IC engine 10b.
- the device 10 could be made from metal materials, including stainless steel or other non- corrosive metals.
- the housing 12 also has a body 26 upon which the ports 20 and 22 are mounted on substantially opposite sides. There is fluidic communication possible from one of the ports 20 and 22 to the other port 22 and 20 through the body 26. Typically, the ports 20 and 22 are located on opposite sides of the body 26. Preferably, the ports 20 and 22 are disposed off axis to a diameter of the body 26, particularly as shown in Figures 2 and 4 - for reasons that will be explained.
- the body 26 has a cavity 28 that is substantially cylindrical, with its axis at 90 degrees to the axes of the ports 20 and 22 and intended to be disposed substantially upright with respect to the IC engine 10b.
- An upper end 30 of the cavity 28 terminates with an externally threaded annular wall 32 upon which is threaded an inspection cap 34.
- a lower end 36 of the cavity 28 terminates with an externally threaded annular wall 38 upon which is threaded a sump cap 40.
- Each cap 34 and 40 is sealed to its end 30 and 36 of the cavity 28 with a respective O-ring 42.
- the cavity 28 has a base wall 50 proximate the lower end 36. which defines a sump 52 with the sump cap 40.
- the base wall 50 has a plurality of apertures, typically in the form of holes 54, for communication of fluid and detritus material from the port 20 as described hereinafter.
- the base wall 50 has a central hole 56 that is substantially coaxial with the axis of the cavity 28 to provide a journal for the perforated chamber 14.
- e inspection cap 34 has a centre post 60 with a hole 62 formed partway into it and arranged for position inside and coaxial with the cavity 28 when the inspection cap 34 is threaded onto the per end 30 of the cavity 28.
- the inspection cap 34 and/or the body 26 could have a transparent portion to allow inspection of the cavity.
- the inspection cap 34 is intended to allow inspection of the colour of the inhibitor liquid in the cooling system 10a and thereby give a quick check as to operation of the inhibitor. In the event of little or no inhibitor colour new pellets 16 need to be added into the perforated chamber 14.
- the perforated chamber 14, particularly as shown in Figure 6. has a spindle 70. a screen 72 and a retainer 74.
- the spindle 70 includes a base plate 76 with a plurality of apertures, conveniently in the form of holes 78. and a shaft 80 disposed upwardly from the base plate 76.
- the base plate 76 also has an annular groove 81 located proximate its outer circumference.
- the shaft 80 has a pair of vanes 82 and a stub 84 proximate its distal end.
- the spindle 70 has another stub 86 on the underside of the base plate 76.
- the screen 72 is substantially cylindrical and has a diameter large enough to receive the pellet 16.
- the screen 72 is perforated with many holes 88.
- the screen 72 is typically made from plastics materials, although it could be made from metals materials, such as. for example. stainless steel.
- the perforations 88 of the screen 72 are provided with small ribs on one side, not shown in the drawings. It is intended that such ribs be disposed from proximate an upper most extent of each perforation 88 to a lowermost extent of each perforation 88 so that liquid passing by the screen 72 can impinge against the ribs and thereby induce the perforated chamber 14 to rotate in the body 26 of the housing 12.
- the ribs are not essential to achieving rotation of the perforated chamber 14. It is the offset of the ports 20 and 22, which is primarily responsible for inducing rotation of the perforated chamber 14. Any ribs used are intended to increase the rate of that rotation for a given flow rate of inhibitor liquid through the cooling system 10a and thereby reduce any likelihood of the device 10 of the present invention leading to clogging of the cooling system 10a in the event that the perforate chamber 14 becomes completely clogged with detritus material entrained in the inhibitor liquid.
- the ribs could be up to about 2 mm high and be disposed substantially parallel to a rotational axis of the perforated chamber 14. It is also envisaged that 10 to 20 ribs could be used disposed evenly about the circumferential surface of the perforated screen 72.
- ⁇ e perforations 88 of the screen 72 typically have a diameter in a range from 0.25 to 1.0 mm for hides having cooling systems 10a with a capacity of up to about 20 litres of inhibitor liquid. It envisaged that in the case of truck and other engines having a cooling system capacity of between 50 and 200 litres, the perforations 88 would have a diameter of up to about 3 mm. That is to say that cooling systems 10a of larger liquid capacity require larger perforations 88.
- the retainer 74 is circular in plan and has a central hole 90 and an annular flange 92 disposed downwardly about the hole 90, particularly as shown in Figure 5.
- the annular flange 92 is dimensioned to receive the vanes 82 of the shaft 80 so that the retainer 74 is attached to the spindle 70.
- the retainer 74 also has an annular groove 94. which matches and overlays the groove 81 of the base plate 76.
- the shaft 80 of the spindle 70 tapers from its lowermost end towards its distal end.
- the tapering is used to inhibit the pellet 16 from touching the base plate 76 and hence inhibits the pellet 16 from blocking the flow of detritus material from falling into the sump 52.
- other means could be used to create a displacement between the pellet and the base plate 76.
- an annular flange could be provided around the shaft 80 proximate the base plate 76. Such a flange could be formed integral with or separate to the shaft 80.
- the perforated chamber 14 is centrally journalled in the body 26 of the housing 12 (by the stubs 84 and 86), and thereby is off axis to the ports 20 and 22. Hence, liquid fiowing through the ports 20 and 22 impinges more on one side of the screen 72 than the other.
- a bypass chamber 98 can be seen though the outlet port 22.
- the bypass chamber 98 is situated inside the cavity 28 along side the perforated chamber 14 and allows the liquid in the cooling system 10a to pass around the perforated chamber 14 and thereby not unduly restrict the flow of the inhibitor liquid.
- the perforated chamber 14 is assembled with the screen 72 inserted over the shaft 80 and located in the annular groove 81.
- the pellet 16 is then inserted into the screen 72 about the shaft 80.
- the retainer 72 is then placed over the distal end of the shaft 80 and the stub 84 inserted into the hole 90 until the vanes 82 engage with the annular flange 92.
- the engagement of the vanes 82 with the flange 92 that keeps the perforated chamber 14 assembled as one piece.
- the perforated chamber 14 fits in the cavity 28 of the body 26.
- the stub 86 fits into the hole 56 of the base wall 50 and the stub 84 fits into the hole 62 the inspection cap 34 to journal the perforated chamber 14 to the body 26 of the housing 12.
- the inhibitor pellet 16 is conveniently formed in two parts, each of a half cylindrical annular shape.
- the inhibitor pellet 16 is sized to fit in the perforated chamber 14 around the shaft 80.
- the inhibitor pellet 16 includes a concentrated inhibitor agent, and a binding agent.
- the inhibitor agent is sufficiently concentrated so as to be able to partly dissolve in de-mineralised water to form an inhibitor liquid in the cooling system 10a and to continue to slowly dissolve over the normal service interval of the IC engine 10b whilst maintaining a concentration of inhibitor in the liquid that will protect the IC engine 10b from corrosion.
- the binding agent of the inhibitor pellet 16 is designed to slow the rate of dissolution of the pellet 16 so that instead of dissolving in a matter of a few hours the pellet dissolves gradually over the normal service interval of the IC engine 10b - which is typically 6 months of 10.000 kms travelled.
- the term “slowly " in relation to the dissolving of the pellet 16 means that the pellet 16 dissolves over a period of time approximately equal, or similar to. the normal service interval of the IC engine 10b. This period could be 6 months, or 10.000 kms travelled for a vehicle engine 10b or about 300 hours of operation of a stationary IC engine 10b.
- inhibitor pellet 16 could also include concentrated anti-freeze agents that arc slowly released by the binding agents.
- the slow release inhibitor-generating device 10 of the present invention is inserted into either the upper or lower radiator hose 23 of an engine cooling system 10a as shown in Figure 7.
- the hose 23 is conveniently clamped in two places to ensure no leakage of liquid from the cooling system 10a during installation of the device 10.
- the hose 23 is then typically cut transversely between the clamps and the ports 20 and 22 inserted into the ends of the cut hose 23.
- Conventional hose clamps are then used to secure the device 10 into the hose 23 so as to avoid leakage.
- the inspection cap 34 is then unthreaded from the wall 32 and the perforated chamber 14 removed from the cavity 28 of the housing 12.
- the retainer 74 is pulled off the shaft 80 and a pellet 16 placed in the screen 72 over the shaft 80.
- the pellet 16 slides down the shaft 80 until it wedges against the shaft 80 and is thereby prevented from falling further and so it held above the base plate 76.
- the retainer 74 is then replaced on the stub 84 to retain the pellet 16 in the :rf orated chamber 14.
- te perforated chamber 14 is then reinserted into the cavity 26 so that the stub 86 is journalled in the hole 56 in the base wall 50.
- the inspection cap 34 is then rethreaded onto the wall 32. making sure that the O-ring seal 42 sits neatly on the wall 32 and seals the inspection cap 34 to the body 26.
- the sump cap 40 is similarly threaded onto the wall 38 with the O-ring seal 42 to prevent leakage of the liquid from the cooling system 10a.
- the clamps are then removed from the hose 23 and the IC engine 10b can be run.
- the existing inhibitor When the device 10 is first installed into an IC engine 10b the existing inhibitor must be removed and disposed of.
- the cooling system 10a is then filled with mineral free water and the device 10 installed into the radiator hose 23.
- liquid When in operation, liquid is pumped around the cooling system 10a in known manner.
- the liquid flows into the device 10 via the inlet port 20 and impinges on the screen 72. Some of the liquid flows through the screen 72 and comes into contact with the pellet 16 and causes the pellet 16 to dissolve a little.
- the rate of dissolution of the pellet 16 is controlled by the binding agents and is such that the pellet 16 will take most of the regular service interval of the IC engine 10b before it completely dissolves.
- the impinging of the inhibitor liquid on the screen 72 causes the perforated chamber 14 to rotate. This is very important since it has the effect of drawing the inhibitor through the housing 12 from the inlet port 20 to the outlet port 22. If the perforated chamber 14 was not able to rotate in the chamber 26 it would present a partial blockage to the flow of inhibitor liquid in the cooling system 10a and would thereby reduce the effectiveness of the cooling system 10a in removing heat from the IC engine 10b. Hence, the rotation of the perforated chamber 14 has the effect of reducing the restriction to flow of inhibitor liquid that the perforated chamber 14 would otherwise make.
- the inspection cap 34 is then removed and the perforated chamber 14 lifted out of the cavity 28.
- the retainer 74 is removed from the shaft 80 and the perforated chamber 14 disassembled and cleaned. After cleaning the perforated chamber 14 is reassembled with a new pellet 16 located around the shaft 80.
- the clamps are then removed and the IC engine 10b can be safely run until the next service interval.
- the inspection cap 34 can be removed, without the need to clamp the hose 23, and the liquid inspected to see if it has a sufficient concentration of inhibitor agent. This can be determined by the colour of the liquid in the cavity 28.
- the inhibitor liquid is a green colour when in sufficient concentrations to protect the IC engine 10b.
- the colour of the liquid typically changes from say green to a muddy brown colour. It is to be understood that other colour changes could be used without departing from the spirit of the present invention.
- the slow release inhibitor-releasing device 10 of the present invention can be used with an IC engine 10b cooling system 10a containing nothing but water.
- the pellet 16 then provides all the inhibitor required for the protection of the IC engine 10b over a relatively long period of time relating substantially to the normal service intervals of the IC engine 10b. During this time the pellet 16 slowly dissolves to maintain the inhibitor level in the IC engine 10b at a sufficiently high level to provide good protection to the IC engine 10b against over-heating and/or corrosion.
- the slow release inhibitor-generating device 10 of the present invention has advantages including; a substantial reduction in the risks of corrosion in the cooling system 10a; improved cooling of the IC engine 10b and thus increased engine efficiency, power and performance; greatly reduced need for servicing of the cooling system 10a; substantial reduction in engine contaminants (through filtering of detritus material and removal via the sump); greatly reduced impact on the environment (through reduced dumping of coolant); and safer to handle than conventional liquid inhibitors. iodifications and variations such as would be apparent to a skilled addressee are considered ithin the scope of the present invention.
- the pellet could be formed onto a metal • plastic former, thereby obviating the need to make the pellet in two halves.
- the housing 1 could be attached directly to or formed integrally with the cooling system 10a or with the IC engine 10b. Such an arrangement could be formed at the time of construction of a radiator of the cooling system 10a or at the time for formation of a block of the IC engine 10b.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Fuses (AREA)
- Medicinal Preparation (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPS269101 | 2001-08-08 | ||
AUPS2691 | 2001-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003014546A1 true WO2003014546A1 (en) | 2003-02-20 |
Family
ID=45879091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2002/001044 WO2003014546A1 (en) | 2001-08-08 | 2002-08-08 | Slow release inhibitor-generating device for an ic engine |
Country Status (3)
Country | Link |
---|---|
MY (1) | MY135143A (en) |
NZ (1) | NZ520674A (en) |
WO (1) | WO2003014546A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007003291U1 (en) * | 2007-03-02 | 2008-07-10 | Hengst Gmbh & Co.Kg | Internal combustion engine with coolant care additive |
DE102010002341A1 (en) * | 2010-02-25 | 2011-08-25 | Behr GmbH & Co. KG, 70469 | Heat exchangers and components for automotive cooling circuits |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333850A (en) * | 1979-06-15 | 1982-06-08 | Borg-Warner Corporation | Filled polymer composition for automatic addition of a corrosion inhibitor to a coolant system |
US4508684A (en) * | 1981-09-08 | 1985-04-02 | Ford Motor Company | Protection of aluminum based structures against heat transfer corrosion in cooling systems |
GB2148265A (en) * | 1983-10-18 | 1985-05-30 | Standard Telephones Cables Ltd | Corrosion inhibitor for vehicle cooling systems |
US5772873A (en) * | 1996-06-21 | 1998-06-30 | Fleetguard, Inc. | Slow release coolant filter |
WO2000006874A1 (en) * | 1998-07-31 | 2000-02-10 | Volvo Lastvagnar Ab | Device for a cooling system |
-
2002
- 2002-08-07 MY MYPI20022936 patent/MY135143A/en unknown
- 2002-08-08 WO PCT/AU2002/001044 patent/WO2003014546A1/en not_active Application Discontinuation
- 2002-08-08 NZ NZ52067402A patent/NZ520674A/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4333850A (en) * | 1979-06-15 | 1982-06-08 | Borg-Warner Corporation | Filled polymer composition for automatic addition of a corrosion inhibitor to a coolant system |
US4508684A (en) * | 1981-09-08 | 1985-04-02 | Ford Motor Company | Protection of aluminum based structures against heat transfer corrosion in cooling systems |
GB2148265A (en) * | 1983-10-18 | 1985-05-30 | Standard Telephones Cables Ltd | Corrosion inhibitor for vehicle cooling systems |
US5772873A (en) * | 1996-06-21 | 1998-06-30 | Fleetguard, Inc. | Slow release coolant filter |
WO2000006874A1 (en) * | 1998-07-31 | 2000-02-10 | Volvo Lastvagnar Ab | Device for a cooling system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007003291U1 (en) * | 2007-03-02 | 2008-07-10 | Hengst Gmbh & Co.Kg | Internal combustion engine with coolant care additive |
DE102010002341A1 (en) * | 2010-02-25 | 2011-08-25 | Behr GmbH & Co. KG, 70469 | Heat exchangers and components for automotive cooling circuits |
Also Published As
Publication number | Publication date |
---|---|
NZ520674A (en) | 2004-03-26 |
MY135143A (en) | 2008-02-29 |
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