EP1680592B1 - Leak alarm for high-pressure pipe - Google Patents
Leak alarm for high-pressure pipe Download PDFInfo
- Publication number
- EP1680592B1 EP1680592B1 EP04767092A EP04767092A EP1680592B1 EP 1680592 B1 EP1680592 B1 EP 1680592B1 EP 04767092 A EP04767092 A EP 04767092A EP 04767092 A EP04767092 A EP 04767092A EP 1680592 B1 EP1680592 B1 EP 1680592B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- leak
- fuel
- valve
- pipe
- 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.)
- Not-in-force
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/006—Measuring or detecting fuel leakage of fuel injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/05—Miscellaneous constructional elements; Leakage detection
Definitions
- the present invention relates to high-pressure pipe systems for common rail engines.
- the invention relates to leak alarms.
- the publication GB A 2060800 discloses a sort of fitting to be used in the double-walled fuel piping of an engine.
- the leak fuel can be drained out of the flow space formed by the outer wall.
- such fittings may be adapted in conjunction with the injector pump manifold and connect the outlets of the fittings to a common drain line.
- the fitting according to this specification is provided with a piston member, which in case of leakage is displaced so that the leak fuel can be directed through the fitting to the drain line and at the same time the pin of the piston member extends out indicating the leakage. It is, however, difficult to apply this arrangement particularly to a large engine provided with a common rail storage injection system, where the fuel piping is extensive and has many branch pipes. By using the disclosed solution the system becomes, among other things, very scattered and therefore difficult to use and maintain.
- FIG. 1 A more advanced fuel feed system is shown in Fig. 1 .
- a similar system can be found in EP 1150 006 .
- the figure shows schematically a section of the fuel feed system of a combustion engine, especially a large combustion engine.
- a large combustion engine is meant for instance such engines that are applicable e.g. as main or auxiliary engines on ships or at power plants for producing heat and/or electricity.
- the large engines are diesel engines.
- Fig. 1 shows an example of a so-called common rail diesel engine.
- the combustion engine is shown here, for the sake of clarity, very schematically and it may be a known engine as such. It is mainly the cylinders 13 and cylinder heads 12 that are shown a bit in more detail. In two of the cylinders also a piston 23 is shown in its upper position.
- Fuel is supplied from a fuel tank 2 by means of a fuel delivery pump 1 via fuel piping 3 to each high-pressure pump 4, which in turn raises the fuel pressure to such a level that a sufficient injection pressure is provided for injectors 11.
- the high-pressure pumps 4 are in communication with pressure accumulator units 6, into which the fuel is fed by means of the high-pressure pump. From the pressure accumulator unit fuel is conducted further to the injectors 11 by means of a fuel manifold 7.
- the example in Fig. 1 comprises preferably an assembly, where the fuel is delivered by means of a high-pressure pump 4 to a pressure accumulator unit 6, from where the fuel is further fed by means of the injectors 11 to engine cylinders 13.
- Each of the pressure accumulator units 6 is connected at least with two injectors 11 and provided with a high-pressure pump 4 of its own.
- the high-pressure pump 4 and the pressure accumulator unit are connected by a fuel feed pipe 5, the pressure accumulator units 6 and the injectors 11 by a fuel manifold 7, and the pressure accumulator units by connecting lines 8 for fuel, whereby at least the fuel feed pipes 5 and the fuel manifold 7 as well as the connecting lines 8 for fuel are formed of double-walled tube, the outer flow spaces 10 (for leak fuel) of which can be connected to each other.
- the leak fuel may flow along the outer flow space 10 and an outlet flow channel 20 to a leak tank 21 and to a leak indicator 22 connected thereto.
- the leak indicator being e.g. a float or an optical sensor indicating the filling of the leak tank, detects the leak.
- the leak fuel is conducted out of the engine's leak tank via a throttle pipe 27.
- the actual fuel being at a high pressure flows inside an inner flow space 110.
- the connecting line 8 for fuel is equipped with at least one detector apparatus 18 for leak fuel being in communication with the outer flow space of the piping possibly by means of a connecting line 17.
- the detector apparatus 18 for leak fuel comprises members for identifying leakage, by means of which members the outer flow spaces can be either coupled into flow connection with one another or disconnected from one another.
- the detector apparatus is further connected by means of a connecting line 19 with the outlet flow channel 20.
- the connecting line 8 for fuel which connects the pressure accumulator units 6 in the fuel feed system are fitted with a partition wall 9 or the like, by which the outer flow space 10 of the feed system and the feed system itself are divided into separate departments, two of which are shown herein, and the first of which comprises one of the pressure accumulator units and the injectors connected thereto as well as a fuel delivery pump, and correspondingly, the second one comprises the other pressure accumulator unit and the injectors connected thereto as well as a fuel delivery pump, and the outer flow space 10 of both departments is connected to the detector apparatus 18 for leak fuel.
- the detector apparatus 18 for leak fuel arranged in the connecting lines for fuel is not, however, always necessary, but in some fuel feed systems and engines the locating of leakage can be carried out only by using primarily the detector apparatus for leak fuel arranged in conjunction with the pressure accumulator units 6.
- Fig. 1 The area 25 outlined with a dashed line in Fig. 1 depicts a so-called hotbox of the engine. Thus, the figure shows the devices placed inside the hotbox.
- Fig. 2 shows a cross-sectional view of the hotbox.
- the hotbox is an area restricted by a cover 28 and the engine's body and other parts 29 thereof, which area utilises the heat energy produced by the engine. Since the cover can be opened, the condition of the devices can be easily checked.
- the indicating apparatus 18 for leak fuel with necessary connecting lines 17, 19 are, for the sake of simplicity, indicated merely by pipe 210.
- Fig. 2 is a simple principal diagram and therefore does not illustrate all possible devices arranged in the hotbox.
- Fig. 3 shows a combustion engine 31 seen from outside.
- the hotbox is normally located at the upper edge of the engine, where its cover 28 can be opened.
- Fig. 4 shows still another application of the detector apparatus for leak fuel.
- This apparatus can be found in EP 1150 006 . It shows by way of example a detail for locating leakage in a high-pressure pipe 5, 7, 8, i.e. at the joining point of the high-pressure pipe (e.g. at the cylinder head or in the pressure accumulator unit),
- a pin 41 with a matching pin housing 42 and a spring-loaded ball 43 or the like adapted in conjunction with the outer flow space 10 in the pressure accumulator unit 6.
- the spring-loaded ball 43 or the like maintains the normal position of the pin by means of a groove or the like (not shown) arranged in the pin and being in cooperation with the ball or the like.
- the pin acts here as a member of action arranged in conjunction with the wall of the pressure accumulator unit 6, the position of which pin with respect to the pressure accumulator unit is changeable by the impact of the leak fuel pressure, and on the basis of the position of which pin with respect to the pressure accumulator unit the flow of the leak fuel can be conducted in the outer flow space of the fuel piping for detecting the leakage.
- leak fuel does not come out of the system even at the locating stage, but the leak is indicated by the pin protruding from the body.
- the use of pins requires relatively complicated and expensive arrangements.
- One of the problems related to the known concepts is also the fact that the delay between the start of leakage and the alarm is relatively long.
- the amount of the leak liquid is small relative to the volume of the leak passage, whereby it takes,a fairly long time before the alarm device (e.g. a leak indicator in conjunction with the leak tank) reacts.
- the leak channel of the high-pressure piping is located outside the hotbox, whereby it needs to be cleaned after each alarm, as the leak fuel has plugged it. Fairly often the throttle channel in conjunction with the leak tank is also adjusted incorrectly with respect to the leak of the high-pressure pipe.
- An object of the present invention is to eliminate the above-mentioned problems related to prior art.
- the object is achieved as is described in the claims.
- the idea of the invention is to connect the leak flow space of a high-pressure pipe through a valve to an expansion space and in addition, to measure the pressure prevailing in the leak flow space.
- the valve e.g. a check valve, provides the operatively necessary limitation of the volume of the flow space for measuring the pressure, and at the same time it acts as an outlet port for possible over-pressure and leak fuel.
- the channel for continuous leak connected with the fuel recycle system acts as an expansion space.
- the advantage with the channel for continuous leak is the fact that it is ready-fitted in the engine, whereby it is fairly easy to arrange a leak pipe including a valve between the high-pressure pipe and the channel for normal leak. Then, the combined volume of the leak pipe and the leak flow space, limited by the valve, makes the volume, in which the pressure sensor measures the pressure.
- the invention relates to an apparatus according to claim 1.
- Fig. 5 shows an example of an apparatus according to the invention.
- the apparatus is based on the apparatus shown in Fig. 1 , but it has been modified so as to comply with the invention.
- the outer flow space 10 of a high-pressure pipe 8 connecting pressure accumulator units 6 is connected via a leak pipe 53 with the engine's channel 15 for continuous leak.
- the leak pipe is provided with a valve 51, preferably a check valve, by which the total volume of the outer flow space and the volume of the leak pipe attached thereto can be limited. It is to be noted that only that part of the leak pipe volume, which is located between the valve and the high-pressure pipe is included in the total limited volume.
- the pressure in the total limited volume is measured by a pressure sensor 52.
- the pressure sensor is provided with an output for transmitting pressure measurement data for instance to a control centre.
- the pressure in the volume limited by the valve will show a rapid increase, on which the pressure sensor will react.
- the delay between the leakage and alarm is as short as possible.
- the fuel leaking to the outer flow space i.e. the leak fuel
- the valve 51 which will open due to the increased pressure, to the channel 15 for continuous leak.
- the valve does not only provide a limited volume (i.e. a common flow space formed by the leak pipe and the outer flow space), but it also offers the leak fuel a drain port out of the engine.
- the apparatus is provided with a pressure sensor.
- the high-pressure pipe 8 is divided by a separating element 9 (partition wall) into two separate volumes.
- the pressure in the first volume is measured by a pressure sensor 52 attached to the leak pipe 53 and the second volume by a sensor attached directly to the high-pressure pipe 8.
- the location of the pressure sensor is thus dependent on the architecture of the system provided that it is connected to the volume exposed to measurement.
- the leak pipe 53 may be realized in a way suitable for the application. It may be e.g. a channel drilled/milled in the constructions.
- Fig. 6 shows the apparatus according to Fig. 5 in cross direction. Figs. 5 and 6 reveal that the channel for normal leak is preferably located inside the hotbox.
- the channel for normal leak located inside the hotbox where the channel for normal leak located inside the hotbox is employed, no separate cleaning of the channels after the alarm is required.
- the heat of the hotbox keeps the leak fuel in the channel fluent and thereby it does not solidify. After the leak, the leak channels are thus in good condition and ready for next leakage, should any occur. So, it is advantageous to arrange the operational members, the pressure sensors and valves included, in the hotbox.
- the pressure in the inner flow space of the high-pressure pipe is generally max. about 1600 bar (in CR engines), and therefore this pressure, in case of pipe fracture, will discharge into the outer flow space 10 and therethrough into the leak pipe 53, whereby the pressure is also decreased. Due to the pressure increase the valve will open so as to allow pressure release to an outside space, which is called an expansion space in this context.
- a channel for continuous leak connected to the fuel recycle system of the engine may act as an expansion space. Also other structural concepts are conceivable for the required expansion space.
- the impact of the pressure in the leak fuel discharge channels needs to be taken into account before the arrangement according to the invention may be realised. If the pressure is not taken into account, the engine is susceptible to breakage.
- the pressure sensor can operate by a distinction of e.g. 0.1 bar and the valve by a distinction of 0.2 bar.
- a more secure operation of the pressure sensor is enabled before the pressure and leak fuel are allowed to discharge to the expansion space.
- the other operating parameters for the pressure sensor and valve are possible.
- each cylinder in the engine, whereby the combination of a pressure sensor and a valve is connected to each cylinder's injector pipe, i.e. high-pressure pipe, which supplies fuel to the cylinder.
- the pressure sensor and/or the valve may also be connected to the high-pressure pipe between the high-pressure pump and the pressure accumulator unit or to the high-pressure pipe between the pressure accumulator units.
- the invention provides a shorter delay between the leakage and alarm, as well as less expensive structural conceptions. Moreover, the invention decreases the need for maintenance and adds to reliability, since the leak channel system need not to be cleaned after possible leakage.
- the above-described embodiments of the detector apparatus for leak fuel are independent, but it is indeed possible to choose for the same engine several basic concepts operating according to different embodiments. In the scope of the present invention it is also possible to combine the operational principles of various embodiments.
- the engine may be a standard engine, common rail engine or another type of engine.
- the engine may be any combustion engine, but preferably it is a diesel engine.
Abstract
Description
- The present invention relates to high-pressure pipe systems for common rail engines. In particular, the invention relates to leak alarms.
- Many combustion engines, especially large combustion engines, comprise a fuel conduit/conduits, in which fuel flows at high pressure. These conduits are generally called high-pressure pipes. For instance in diesel engines it is known to arrange the fuel pipes inside another tubular sleeve in order to retain possible leaks inside the outer tubing. Should leakage occur in the system, the leak fuel will flow out of the engine inside the other sleeve. Such solutions are disclosed e.g. in
EP A 0002385 andEP A 0786593 . - For detecting leaks in corresponding arrangements e.g. various kinds of plugs have been used, by unfastening of which plugs the leak could have been detected. Another commonly used method has been the use of detachable hoses, by detaching of which it has been possible to detect the leak, as well. This known method is, however, most elementary, as the locating of the leak has been very slow and also laborious by using this method. Hoses or plugs need to be unfastened in turn till the leakage is possibly found sometimes.
- The publication
GB A 2060800 - A more advanced fuel feed system is shown in
Fig. 1 . A similar system can be found inEP 1150 006 . The figure shows schematically a section of the fuel feed system of a combustion engine, especially a large combustion engine. By a large combustion engine is meant for instance such engines that are applicable e.g. as main or auxiliary engines on ships or at power plants for producing heat and/or electricity. Generally, the large engines are diesel engines. More precisely,Fig. 1 shows an example of a so-called common rail diesel engine. - The combustion engine is shown here, for the sake of clarity, very schematically and it may be a known engine as such. It is mainly the
cylinders 13 andcylinder heads 12 that are shown a bit in more detail. In two of the cylinders also apiston 23 is shown in its upper position. Fuel is supplied from afuel tank 2 by means of a fuel delivery pump 1 viafuel piping 3 to each high-pressure pump 4, which in turn raises the fuel pressure to such a level that a sufficient injection pressure is provided forinjectors 11. The high-pressure pumps 4 are in communication withpressure accumulator units 6, into which the fuel is fed by means of the high-pressure pump. From the pressure accumulator unit fuel is conducted further to theinjectors 11 by means of afuel manifold 7. - From the
nozzle 11 at the cylinder head some fuel is continuously leaking and it is led through aleak pipe 14 to achannel 15 for continuous leak, which is connected to a fuel recycle system. Also in the high-pressure pump 4 some normal leakage occurs and is led via aleak pipe 24 to aleak channel 15. - Thus, the example in
Fig. 1 comprises preferably an assembly, where the fuel is delivered by means of a high-pressure pump 4 to apressure accumulator unit 6, from where the fuel is further fed by means of theinjectors 11 toengine cylinders 13. Each of thepressure accumulator units 6 is connected at least with twoinjectors 11 and provided with a high-pressure pump 4 of its own. The high-pressure pump 4 and the pressure accumulator unit are connected by afuel feed pipe 5, thepressure accumulator units 6 and theinjectors 11 by afuel manifold 7, and the pressure accumulator units by connectinglines 8 for fuel, whereby at least thefuel feed pipes 5 and thefuel manifold 7 as well as the connectinglines 8 for fuel are formed of double-walled tube, the outer flow spaces 10 (for leak fuel) of which can be connected to each other. Thus, in case of leakage somewhere in the system, the leak fuel may flow along theouter flow space 10 and anoutlet flow channel 20 to aleak tank 21 and to aleak indicator 22 connected thereto. The leak indicator, being e.g. a float or an optical sensor indicating the filling of the leak tank, detects the leak. The leak fuel is conducted out of the engine's leak tank via athrottle pipe 27. The actual fuel being at a high pressure flows inside aninner flow space 110. - For locating the fuel leakage point the connecting
line 8 for fuel is equipped with at least onedetector apparatus 18 for leak fuel being in communication with the outer flow space of the piping possibly by means of a connectingline 17. Thedetector apparatus 18 for leak fuel comprises members for identifying leakage, by means of which members the outer flow spaces can be either coupled into flow connection with one another or disconnected from one another. The detector apparatus is further connected by means of a connectingline 19 with theoutlet flow channel 20. - As shown further in
Fig. 1 , the connectingline 8 for fuel, which connects thepressure accumulator units 6 in the fuel feed system are fitted with apartition wall 9 or the like, by which theouter flow space 10 of the feed system and the feed system itself are divided into separate departments, two of which are shown herein, and the first of which comprises one of the pressure accumulator units and the injectors connected thereto as well as a fuel delivery pump, and correspondingly, the second one comprises the other pressure accumulator unit and the injectors connected thereto as well as a fuel delivery pump, and theouter flow space 10 of both departments is connected to thedetector apparatus 18 for leak fuel. In this case thedetector apparatus 18 for leak fuel arranged in the connecting lines for fuel is not, however, always necessary, but in some fuel feed systems and engines the locating of leakage can be carried out only by using primarily the detector apparatus for leak fuel arranged in conjunction with thepressure accumulator units 6. - The
area 25 outlined with a dashed line inFig. 1 depicts a so-called hotbox of the engine. Thus, the figure shows the devices placed inside the hotbox. -
Fig. 2 shows a cross-sectional view of the hotbox. The hotbox is an area restricted by acover 28 and the engine's body andother parts 29 thereof, which area utilises the heat energy produced by the engine. Since the cover can be opened, the condition of the devices can be easily checked. The indicatingapparatus 18 for leak fuel with necessary connectinglines pipe 210.Fig. 2 is a simple principal diagram and therefore does not illustrate all possible devices arranged in the hotbox.Fig. 3 shows acombustion engine 31 seen from outside. The hotbox is normally located at the upper edge of the engine, where itscover 28 can be opened. -
Fig. 4 shows still another application of the detector apparatus for leak fuel. This apparatus can be found inEP 1150 006 . It shows by way of example a detail for locating leakage in a high-pressure pipe pin 41 with a matchingpin housing 42, and a spring-loadedball 43 or the like adapted in conjunction with theouter flow space 10 in thepressure accumulator unit 6. The spring-loadedball 43 or the like maintains the normal position of the pin by means of a groove or the like (not shown) arranged in the pin and being in cooperation with the ball or the like. Should leakage occur for instance in pipe 8 (or in other high-pressure pipes, the outer flow space of which is by means of separate channels connected topipe 8 shown inFig. 4 ), the pressure starts rising in the pressure space 44 of the pin housing. By an appropriate design of the spring-loadedball 43 or the like and of the groove or the like in cooperation therewith, it is possible to determine the pressure in the pressure space 44, at which the pin starts moving outwards in thepin housing 42 till the situation shown inFig. 4 is achieved, where the leak fuel is allowed to discharge via achannel 45 forward, up to aleak indicator device 22. Thus, the pin acts here as a member of action arranged in conjunction with the wall of thepressure accumulator unit 6, the position of which pin with respect to the pressure accumulator unit is changeable by the impact of the leak fuel pressure, and on the basis of the position of which pin with respect to the pressure accumulator unit the flow of the leak fuel can be conducted in the outer flow space of the fuel piping for detecting the leakage. In the solution according to this embodiment leak fuel does not come out of the system even at the locating stage, but the leak is indicated by the pin protruding from the body. As it will be observed fromFig. 4 , the use of pins requires relatively complicated and expensive arrangements. - Further,
DE 4341777 andUS 6032699 disclose pressure sensors connected to an outer space of double walled fuel pipes, which are used for providing a leak alarm. These documents concerns embodiments of a relatively low pressure levels when compared to common rail engines. - One of the problems related to the known concepts is also the fact that the delay between the start of leakage and the alarm is relatively long. The amount of the leak liquid is small relative to the volume of the leak passage, whereby it takes,a fairly long time before the alarm device (e.g. a leak indicator in conjunction with the leak tank) reacts. Moreover, in some engine types the leak channel of the high-pressure piping is located outside the hotbox, whereby it needs to be cleaned after each alarm, as the leak fuel has plugged it. Fairly often the throttle channel in conjunction with the leak tank is also adjusted incorrectly with respect to the leak of the high-pressure pipe.
- An object of the present invention is to eliminate the above-mentioned problems related to prior art. The object is achieved as is described in the claims. The idea of the invention is to connect the leak flow space of a high-pressure pipe through a valve to an expansion space and in addition, to measure the pressure prevailing in the leak flow space. The valve, e.g. a check valve, provides the operatively necessary limitation of the volume of the flow space for measuring the pressure, and at the same time it acts as an outlet port for possible over-pressure and leak fuel.
- The channel for continuous leak connected with the fuel recycle system acts as an expansion space. The advantage with the channel for continuous leak is the fact that it is ready-fitted in the engine, whereby it is fairly easy to arrange a leak pipe including a valve between the high-pressure pipe and the channel for normal leak. Then, the combined volume of the leak pipe and the leak flow space, limited by the valve, makes the volume, in which the pressure sensor measures the pressure.
- Thus, the invention relates to an apparatus according to claim 1.
- In the following the invention is described with reference to the attached drawings, in which
-
Figure 1 shows an example of a prior art apparatus for leakage in a high-pressure pipe; -
Figure 2 shows an example of the apparatus according toFig. 1 in cross direction; -
Figure 3 shows an example of a combustion engine seen from outside; -
Figure 4 shows an example of an indicator pin for leak fuel; -
Figure 5 shows an example of an apparatus according to the invention; and -
Figure 6 shows an example of the apparatus according toFig. 5 in cross direction. -
Fig. 5 shows an example of an apparatus according to the invention. The apparatus is based on the apparatus shown inFig. 1 , but it has been modified so as to comply with the invention. In this example theouter flow space 10 of a high-pressure pipe 8 connectingpressure accumulator units 6 is connected via aleak pipe 53 with the engine'schannel 15 for continuous leak. The leak pipe is provided with avalve 51, preferably a check valve, by which the total volume of the outer flow space and the volume of the leak pipe attached thereto can be limited. It is to be noted that only that part of the leak pipe volume, which is located between the valve and the high-pressure pipe is included in the total limited volume. - The pressure in the total limited volume is measured by a
pressure sensor 52. The pressure sensor is provided with an output for transmitting pressure measurement data for instance to a control centre. In case of leakage in the high-pressure pipe, the pressure in the volume limited by the valve will show a rapid increase, on which the pressure sensor will react. Thus the delay between the leakage and alarm is as short as possible. - The fuel leaking to the outer flow space, i.e. the leak fuel, is allowed to discharge through the
valve 51, which will open due to the increased pressure, to thechannel 15 for continuous leak. Thus, the valve does not only provide a limited volume (i.e. a common flow space formed by the leak pipe and the outer flow space), but it also offers the leak fuel a drain port out of the engine. The apparatus is provided with a pressure sensor. - It is shown in
Fig. 5 that the high-pressure pipe 8 is divided by a separating element 9 (partition wall) into two separate volumes. The pressure in the first volume is measured by apressure sensor 52 attached to theleak pipe 53 and the second volume by a sensor attached directly to the high-pressure pipe 8. The location of the pressure sensor is thus dependent on the architecture of the system provided that it is connected to the volume exposed to measurement. Also theleak pipe 53 may be realized in a way suitable for the application. It may be e.g. a channel drilled/milled in the constructions. - Also the location of the
valve 51 is dependent in the architecture of the system. The leak pipe may be quite short, whereby the location of the valve has no alternatives, or the leak pipe may be long, whereby the location of the valve is freer.Fig. 6 shows the apparatus according toFig. 5 in cross direction.Figs. 5 and6 reveal that the channel for normal leak is preferably located inside the hotbox. - In the embodiment according to the invention, where the channel for normal leak located inside the hotbox is employed, no separate cleaning of the channels after the alarm is required. The heat of the hotbox keeps the leak fuel in the channel fluent and thereby it does not solidify. After the leak, the leak channels are thus in good condition and ready for next leakage, should any occur. So, it is advantageous to arrange the operational members, the pressure sensors and valves included, in the hotbox.
- Since the measurement is carried out by a pressure sensor/sensors, neither a
leak tank 21 nor athrottle channel 27 connected therewith is required. - The pressure in the inner flow space of the high-pressure pipe is generally max. about 1600 bar (in CR engines), and therefore this pressure, in case of pipe fracture, will discharge into the
outer flow space 10 and therethrough into theleak pipe 53, whereby the pressure is also decreased. Due to the pressure increase the valve will open so as to allow pressure release to an outside space, which is called an expansion space in this context. As can be concluded from the described embodiments, a channel for continuous leak connected to the fuel recycle system of the engine may act as an expansion space. Also other structural concepts are conceivable for the required expansion space. The impact of the pressure in the leak fuel discharge channels needs to be taken into account before the arrangement according to the invention may be realised. If the pressure is not taken into account, the engine is susceptible to breakage. - As the pressure in the high-pressure pipe is allowed to discharge sufficiently fast to a sufficiently large volume, the dimensioning of the leak pipes and used channels does not cause any problems. The pressure sensor can operate by a distinction of e.g. 0.1 bar and the valve by a distinction of 0.2 bar. Thus a more secure operation of the pressure sensor is enabled before the pressure and leak fuel are allowed to discharge to the expansion space. Also the other operating parameters for the pressure sensor and valve are possible.
- Some cost saving is achieved by the engine structure according to the invention, as a separate channel system or an actuator is no longer needed. By comparing
Fig. 5 withFig. 1 it is observed that thedetector apparatus 18 for leak fuel with thenecessary connection lines leak tank 21 with the required equipment are unnecessary in the structural conception according to the invention. The costs of the pressure sensor and valve are lower than the saved costs. - It is also possible to arrange an individual control for each cylinder in the engine, whereby the combination of a pressure sensor and a valve is connected to each cylinder's injector pipe, i.e. high-pressure pipe, which supplies fuel to the cylinder. The pressure sensor and/or the valve may also be connected to the high-pressure pipe between the high-pressure pump and the pressure accumulator unit or to the high-pressure pipe between the pressure accumulator units.
- Thus the invention provides a shorter delay between the leakage and alarm, as well as less expensive structural conceptions. Moreover, the invention decreases the need for maintenance and adds to reliability, since the leak channel system need not to be cleaned after possible leakage.
- The above-described embodiments of the detector apparatus for leak fuel are independent, but it is indeed possible to choose for the same engine several basic concepts operating according to different embodiments. In the scope of the present invention it is also possible to combine the operational principles of various embodiments. The engine may be a standard engine, common rail engine or another type of engine. The engine may be any combustion engine, but preferably it is a diesel engine.
- It is thus clear that the above-described technical solutions are shown only by way of example, and therefore the invention is not limited to the above-described embodiment, but several other modifications are conceivable within the scope of the appended claims.
Claims (9)
- An apparatus of a common rail engine (31) for leakage in a common rail high-pressure pipe (5, 7, 8), in which apparatus the high-pressure piping (5, 7, 8) consists of double-walled fuel piping comprising an inner flow space (110) for fuel and an outer flow space (10) for possible leak fuel, and which apparatus comprises at least one leak pipe (53) in communication with the outer flow space, through which leak pipe possible leak fuel is led out, the apparatus further comprising at least one separate valve (51) that is arranged to open, due to increased and/or increasing pressure, characterised in that the apparatus comprises at least one pressure sensor (52) which is separate from the value (51), said pressure sensor provided with an output for transmitting pressure measurement data for an alarm, in which apparatus the leak pipe (53) is connected via the valve to an expansion space (15), and in which apparatus the pressure sensor (52) is connected to a common flow space of the leak pipe (53) and the outer flow space (10),
which pressure sensor (52) is arranged to detect increased and/or increasing pressure in the common flow space for an alarm, and which valve (51) is arranged to open, due to increased and/or increasing pressure in the common flow space for draining the leak fuel to the expansion space (15), the expansion space (15) being a channel for the continuous leak from the engine (31) and being in communication with the fuel recycle system of the engine. - An apparatus according to claim 1, characterised in that operation of the pressure sensor (52) is enabled before the opening of the valve (51).
- An apparatus according to claim 1 or 2, characterised in that the leak pipe/pipes (53), valve/valves (51) and pressure sensor/sensors (52) are located inside a hotbox (25).
- An apparatus according to claim 3, characterised in that the channel for continuous leak (15) is located inside a hotbox (25).
- An apparatus according to claim4, characterised in that the channel for continuous leak (15) is connected by piping with the fuel recycle system.
- An apparatus according to any one of claims 1 - 5, characterised in that the pressure sensor (52) and/or the valve (51) is connected to the high-pressure pipe (7), which supplies fuel to the cylinder (13).
- An apparatus according to any one of claims 1 - 5, characterised in that the pressure sensor (52) and/or the valve (51) is connected to the high-pressure pipe (5) between a high-pressure pump (4) and a pressure accumulator unit (6).
- An apparatus according to any one of claims 1-5, characterised in that the pressure sensor (52) and/or the valve (51) is connected to the high-pressure pipe (8) between the pressure accumulator units (6).
- An apparatus according to any one of claims 1 - 8, characterised in that the valve (51) is a check valve.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20031522A FI119702B (en) | 2003-10-17 | 2003-10-17 | Internal combustion engine equipment for high pressure pipe leaks |
PCT/FI2004/000578 WO2005038232A1 (en) | 2003-10-17 | 2004-10-04 | Leak alarm for high-pressure pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1680592A1 EP1680592A1 (en) | 2006-07-19 |
EP1680592B1 true EP1680592B1 (en) | 2010-04-14 |
Family
ID=29225964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04767092A Not-in-force EP1680592B1 (en) | 2003-10-17 | 2004-10-04 | Leak alarm for high-pressure pipe |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1680592B1 (en) |
KR (1) | KR101130388B1 (en) |
CN (1) | CN100430594C (en) |
AT (1) | ATE464471T1 (en) |
DE (1) | DE602004026614D1 (en) |
FI (1) | FI119702B (en) |
WO (1) | WO2005038232A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2562349C1 (en) * | 2014-03-11 | 2015-09-10 | Филюс Раисович Сафин | Method of testing and adjustment of diesel fuel devices and test rig for this method implementation |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2011996B1 (en) | 2007-07-04 | 2012-03-14 | Caterpillar Motoren GmbH & Co. KG | Fuel system for a combustion engine having local leakage detection |
DE102008006196B4 (en) | 2008-01-26 | 2019-03-14 | Man Diesel & Turbo Se | Fuel supply system of an internal combustion engine |
DE102008015611A1 (en) * | 2008-03-26 | 2009-10-29 | Man Diesel Se | Common Rail System |
FI120886B (en) * | 2008-06-05 | 2010-04-15 | Waertsilae Finland Oy | Fuel injection system for piston engine |
FI120843B (en) * | 2008-06-05 | 2010-03-31 | Waertsilae Finland Oy | High Pressure Fuel Interface Arrangement for Injector Nozzle in a Common Rail Storage System |
DE102008045193A1 (en) * | 2008-08-30 | 2010-03-04 | Man Diesel Se | Fuel supply system i.e. common rail fuel supply system, for marine diesel internal combustion engine, has region maintaining emergency operating pressure through casing and separated from low pressure region by check valve |
FI20115126L (en) * | 2011-02-09 | 2012-08-10 | Waertsilae Finland Oy | Fuel injection system |
FI124086B (en) * | 2011-02-09 | 2014-03-14 | Wärtsilä Finland Oy | Pipe coupling and fuel injection system |
DE102011005096A1 (en) * | 2011-03-04 | 2012-09-06 | Man Diesel & Turbo Se | internal combustion engine |
JP5742824B2 (en) * | 2012-11-30 | 2015-07-01 | トヨタ自動車株式会社 | Leak test method |
KR102073986B1 (en) * | 2012-12-26 | 2020-02-05 | 두산인프라코어 주식회사 | Fuel Leakage Checking Device of Ship Engine |
DE102013000606A1 (en) * | 2013-01-16 | 2014-07-17 | Man Diesel & Turbo Se | Fuel supply system |
EP3128167B1 (en) * | 2015-08-03 | 2017-12-20 | AVL Autokut Engineering KFT. | Leakage detection device for a double walled fluid pipe |
CN108368808B (en) * | 2015-10-09 | 2020-06-30 | 瓦锡兰芬兰有限公司 | Leak detection device |
US10746147B2 (en) | 2016-05-11 | 2020-08-18 | Peter Fuchs Technology Group Ag | High-pressure line |
DE102016119811A1 (en) * | 2016-10-18 | 2018-04-19 | Man Diesel & Turbo Se | Fuel supply system |
DE102016123055A1 (en) * | 2016-11-30 | 2018-05-30 | Man Diesel & Turbo Se | Fuel supply system and power distribution block |
CN108930622B (en) * | 2017-05-23 | 2021-02-19 | 宝山钢铁股份有限公司 | Mobile diesel engine high-pressure shunt pressure comprehensive diagnosis device and diagnosis method |
CN107366597B (en) * | 2017-09-15 | 2019-12-10 | 河南柴油机重工有限责任公司 | Arrangement structure of electronic control high-pressure common rail system in marine high-speed high-power diesel engine |
CN107676205A (en) * | 2017-09-30 | 2018-02-09 | 河北华北柴油机有限责任公司 | A kind of engine oil tube leakage protection system |
WO2019132867A1 (en) | 2017-12-27 | 2019-07-04 | Cummins Inc. | System and method for identifying a source of high pressure leakage |
CN108869034B (en) * | 2018-09-05 | 2023-09-01 | 常熟市国瑞科技股份有限公司 | Early warning device for fuel leakage flow of diesel engine |
JP2023111441A (en) * | 2022-01-31 | 2023-08-10 | 三菱重工エンジン&ターボチャージャ株式会社 | fuel system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4341777A1 (en) * | 1993-12-08 | 1995-06-14 | Bosch Gmbh Robert | IC engine fuel tank ventilation device |
US6032699A (en) * | 1997-05-19 | 2000-03-07 | Furon Company | Fluid delivery pipe with leak detection |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4149568A (en) * | 1977-12-07 | 1979-04-17 | Caterpillar Tractor Co. | Double walled fuel line |
GB2060800B (en) | 1979-08-08 | 1983-07-13 | Giro Eng Ltd | Fitting for double wall tubing |
DE19520300A1 (en) * | 1995-06-02 | 1996-12-05 | Bosch Gmbh Robert | Device for detecting a leak in a fuel supply system |
GB2306672B (en) * | 1995-11-01 | 2000-03-22 | Framo Eng As | Monitoring system for high pressure fluid flow connector |
IT1284334B1 (en) | 1996-01-23 | 1998-05-18 | Fiat Ricerche | FUEL CONTAINMENT AND COLLECTION STRUCTURE FOR A HIGH PRESSURE FUEL ENGINE INJECTION SYSTEM |
FI108070B (en) * | 2000-04-27 | 2001-11-15 | Waertsilae Tech Oy Ab | Hardware for locating a fuel leak with an internal combustion engine |
DE10245389A1 (en) * | 2002-09-28 | 2004-04-08 | Daimlerchrysler Ag | Double wall common rail injection system for a combustion engine and leak tightness testing method has high pressure lead for applying a test gas |
US6827065B2 (en) * | 2003-04-08 | 2004-12-07 | General Motors Corporation | Diesel injection system with dual flow fuel line |
-
2003
- 2003-10-17 FI FI20031522A patent/FI119702B/en not_active IP Right Cessation
-
2004
- 2004-10-04 AT AT04767092T patent/ATE464471T1/en not_active IP Right Cessation
- 2004-10-04 WO PCT/FI2004/000578 patent/WO2005038232A1/en active Application Filing
- 2004-10-04 KR KR1020067007371A patent/KR101130388B1/en active IP Right Grant
- 2004-10-04 DE DE602004026614T patent/DE602004026614D1/en active Active
- 2004-10-04 CN CNB2004800304482A patent/CN100430594C/en not_active Expired - Fee Related
- 2004-10-04 EP EP04767092A patent/EP1680592B1/en not_active Not-in-force
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4341777A1 (en) * | 1993-12-08 | 1995-06-14 | Bosch Gmbh Robert | IC engine fuel tank ventilation device |
US6032699A (en) * | 1997-05-19 | 2000-03-07 | Furon Company | Fluid delivery pipe with leak detection |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2562349C1 (en) * | 2014-03-11 | 2015-09-10 | Филюс Раисович Сафин | Method of testing and adjustment of diesel fuel devices and test rig for this method implementation |
Also Published As
Publication number | Publication date |
---|---|
ATE464471T1 (en) | 2010-04-15 |
CN1867762A (en) | 2006-11-22 |
EP1680592A1 (en) | 2006-07-19 |
FI20031522A0 (en) | 2003-10-17 |
FI20031522A (en) | 2005-04-18 |
KR101130388B1 (en) | 2012-03-28 |
KR20060095758A (en) | 2006-09-01 |
CN100430594C (en) | 2008-11-05 |
FI119702B (en) | 2009-02-13 |
DE602004026614D1 (en) | 2010-05-27 |
WO2005038232A1 (en) | 2005-04-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1680592B1 (en) | Leak alarm for high-pressure pipe | |
US6827065B2 (en) | Diesel injection system with dual flow fuel line | |
US20100288018A1 (en) | Fuel system for a combustion engine having local leakage detection | |
KR101720380B1 (en) | Pipe connector and fuel injection system | |
RU2491443C2 (en) | Piston engine fuel injection system | |
US20140000562A1 (en) | Fuel injection system | |
EP1150006A2 (en) | Arrangement for locating fuel leakage in connection with a combustion engine | |
FI125666B (en) | Fuel supply device for an internal combustion engine | |
US8997715B2 (en) | Common rail system with leak containment and detection | |
FI123671B (en) | Pipe coupling and fuel injection system | |
JP6486604B2 (en) | Fuel supply device | |
CN217784325U (en) | Water filling valve with new structure | |
CN213235632U (en) | Hydraulic detection structure of integrated double-hydraulic cartridge valve | |
EP3128167B1 (en) | Leakage detection device for a double walled fluid pipe |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20060605 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20081009 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 602004026614 Country of ref document: DE Date of ref document: 20100527 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20100414 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100725 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100428 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100715 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100816 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 |
|
26N | No opposition filed |
Effective date: 20110117 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101102 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20110630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101004 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101004 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20101015 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100414 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20100714 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20171019 Year of fee payment: 14 Ref country code: IT Payment date: 20171019 Year of fee payment: 14 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181031 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20181004 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20191021 Year of fee payment: 16 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20191021 Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602004026614 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20201004 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20210501 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20201004 |