EP3642472B1 - Device and method for return pressure adjustment for an injector - Google Patents
Device and method for return pressure adjustment for an injector Download PDFInfo
- Publication number
- EP3642472B1 EP3642472B1 EP18728098.7A EP18728098A EP3642472B1 EP 3642472 B1 EP3642472 B1 EP 3642472B1 EP 18728098 A EP18728098 A EP 18728098A EP 3642472 B1 EP3642472 B1 EP 3642472B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- return
- pressure
- injector
- valve
- return line
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 13
- 238000002347 injection Methods 0.000 claims description 44
- 239000007924 injection Substances 0.000 claims description 44
- 238000005259 measurement Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000000446 fuel Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/005—Pressure relief valves
- F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
- F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
-
- 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
- F02M65/001—Measuring fuel delivery of a fuel injector
-
- 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
Definitions
- the invention relates to a device for setting the return pressure for an injector and a return block for injectors.
- the invention also relates to a measuring device for measuring the injection quantity and / or return quantity for at least one injector and a test stand for at least one injector.
- the invention also relates to a method for setting the return pressure on at least one injector.
- WO 2009/056558 A1 describes a fuel system for controlling a fuel supply for an internal combustion engine.
- a pressure in a leakage line of the fuel system is detected by a sensor and transmitted to a pressure regulator, which regulates a pressure control valve.
- a counter pressure leakage should be controllable by means of the pressure regulating valve of the fuel system.
- the invention creates a device for setting the return pressure for an injector with the features of claim 1, a return block for injectors with the
- a measuring device for injection quantity and / or return quantity measurement for at least one injector with the features of claim 8 a test stand for at least one injector with the features of claim 9 and a method for setting the return pressure on at least one injector with the features of Claim 10.
- the electrically adjustable throttle valve for setting / regulating the return pressure is relatively tolerance-free, as a result of which inaccuracies in setting / regulating the return pressure are avoided / reduced to a minimum.
- the return pressure can be set / regulated more precisely / more reliably by means of the electrically adjustable throttle valve.
- the quality of the measurements of the injection quantity and / or the return quantity can also be increased (or increased) by means of the improved accuracy of the set / regulated return pressure . Measurement errors when measuring the injection quantity and / or the return quantity are reduced).
- the electrically adjustable throttle valve can be used to set the return pressure at least between the first end of the return line and the electrically adjustable throttle valve in the return line to each return pressure value of a set of values with at least two different return pressure values.
- the return pressure can be varied by means of the electrically adjustable throttle valve over a comparatively large set of values from different return pressure values, while at the same time ensuring the advantageous accuracy when setting / adjusting the return pressure to a target return pressure of the respective injector type of the injector connected to the first end .
- the device described here for setting the return pressure is therefore suitable for a large number of applications of different injector types or injector generations, even if they require different return pressures.
- the adjustable / adjustable return pressure can be varied over a set of values between 0 bar and 10 bar. The one described here
- Embodiment of the device for setting the return pressure therefore eliminates the conventional disadvantage that up to now a device specifically specified for this purpose, which has the specially designed mechanical pressure control valves, had to be used for each injector type and for each injector generation.
- An operator of the device described here for setting the return pressure therefore does not need different devices for different injector types or injector generations. Additional equipment can also be saved by means of the device described here for setting the return pressure. The operator thus saves money, storage space in the workshop and does not lose any set-up time (for equipping the device he is using with the appropriate additional equipment).
- the electrically adjustable throttle valve can be a common rail pressure control valve or a diesel common rail pressure control valve.
- the electrically adjustable throttle valve can also be a high pressure injection valve or a gasoline high pressure injection valve.
- the valve types described here are inexpensive actuators.
- the valve types described here can work together reliably as an electrically adjustable throttle valve in conjunction with an inexpensive standard pressure sensor (from the automotive sector).
- the device can have a controller which is designed to output at least one control signal with a modulated pulse width for clocked control of the common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
- a controller which is designed to output at least one control signal with a modulated pulse width for clocked control of the common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
- the device preferably also comprises a pressure sensor and / or a temperature sensor connected to the return line between the first end of the return line and the electrically adjustable throttle valve. Equipping the device for setting the return pressure with the pressure sensor enables the return pressure to be regulated by means of the electrically adjustable throttle valve by "throttling", so that the Return pressure increases at least between the first end of the return line and the electrically adjustable throttle valve in the return line until a desired target return pressure / target pressure is / is reached. A back pressure that arises between the first end of the return line and the electrically adjustable throttle valve can be detected via the pressure sensor and used for a corresponding regulation of the electrically adjustable throttle valve. An additional use of the temperature sensor also allows thermodynamic influences to be taken into account.
- the advantages described above are also implemented in a return block for injectors with at least two such devices for setting the return pressure.
- the return block can also have at least one controller which is designed to send at least one control signal with a modulated pulse width for clocked control of the at least one associated common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve to spend.
- a measuring device for injection quantity and / or return quantity measurement for at least one injector with at least one such device for return pressure adjustment, or a corresponding return block, and at least one injection quantity and / or return quantity sensor, by means of which an injection quantity and / or the flow rate through the associated return line flowing return volume can be measured brings about the advantages described above.
- Fig. 1 shows a schematic representation of an embodiment of the device for setting the return pressure.
- the device 10 shown schematically for setting the return pressure can (also) be used for examining / checking an injector 12.
- the injector 12 can be understood to be a common rail injector or an injection valve.
- the device 10 for setting the return pressure can be used with a large number of different types of injectors 12 (or different generations of injectors 12).
- the device 10 for setting the return pressure has a return line 14.
- the return outlet opening 12a can also be connected to the first end 14a of the return line 14 via at least one connection component / be connected. (An injection opening 12b of the injector 12, through which an injection quantity 18 of the injector 12 emerges from the injector 12, is not connected to the return line 14.)
- the device 10 for setting the return pressure also includes an electrically adjustable throttle valve 20, by means of which a return pressure can be set at least between the first end 14a of the return line 14 with the connected injector 12 and the electrically adjustable throttle valve 20 in the return line 14.
- the return pressure is thus a defined pressure between the injector 12 and the electrically adjustable throttle valve 20.
- the use of the electrically adjustable throttle valve 20 allows a high level of accuracy when setting / regulating the return pressure. In particular, the return pressure can be reliably set / regulated equal to a desired / predetermined setpoint return pressure.
- the return pressure (at least between the first end 14a of the return line and the electrically adjustable throttle valve 20) in the return line 14 can optionally be set to each return pressure value of a set of values with at least two different return pressure values. Therefore, the device 10 for setting the return pressure can also be used for different types of injectors and different generations of injectors, even if their desired / predetermined target return pressures differ from one another. Using the device 10 for setting the return pressure therefore enables the advantages already explained above for reducing costs, saving set-up times and reducing space requirements.
- the device 10 for setting the return pressure preferably also comprises one between the first end 14a of the return line 14 and the electrical one adjustable throttle valve 20 connected to the return line 14. In this case, regulation of the return pressure by means of an interaction of the electrically adjustable throttle valve 20 and the pressure sensor 22 is also possible.
- the device 10 for setting the return pressure can also have a (in Fig. 1 not shown) include temperature sensor.
- the electrically adjustable throttle valve 20 can be, for example, a common rail pressure control valve (or a diesel common rail pressure control valve).
- a (diesel) common rail pressure control valve (as a hydraulic proportional valve) is designed for comparatively high pressures (depending on the type between 1800 bar and 2500 bar)
- by means of a clocked control of the (diesel) common rail pressure control valve with a Modulation of pulse widths can also bring about a set of values of customary setpoint return pressures (at least between the first end 14a of the return line and the electrically adjustable throttle valve 20) in the return line 14. This means that even return pressures in the low pressure range (between 0 bar and 10 bar) can be achieved and reliably maintained.
- a controller 24 of the device 10 for setting the return pressure is therefore preferably designed to output at least one control signal 26 with a modulated pulse width for clocked control of the (diesel) common rail pressure control valve.
- the electrically adjustable throttle valve 20 is a high-pressure injection valve (or a high-pressure gasoline injection valve).
- the (gasoline) high-pressure injection valve can be controlled / controlled by the control 24 by means of at least one control signal 26 (e.g. a simple square-wave signal) with a modulated pulse width. It is not necessary to control the (gasoline) high-pressure injection valve by means of complex control signals, which requires a complex output stage to generate the complex control signals.
- the exemplary embodiments listed above for the electrically adjustable throttle valve 20 enable pressure setting / pressure regulation without complex control effort and without high additional costs. This also causes a significant reduction in the outlay on product maintenance during operation of the device 10 for setting the return pressure.
- an injection quantity and / or return quantity sensor 28 by means of which the injection quantity 18 and / or the return quantity 16 flowing through the return line 14 can be measured, can be connected of the device 10 for the return pressure adjustment.
- the device 10 for setting the return pressure is therefore versatile.
- the device 10 for setting the return pressure can, for example, be part of a test stand.
- Fig. 2 shows a schematic representation of an embodiment of the return block.
- the in Fig. 2 The return block shown schematically can be used for examining / checking multiple injectors 12.
- the return block has several devices 10 for setting the return pressure.
- Each of the devices 10 for setting the return pressure comprises the components of the embodiment described above.
- each of the devices 10 for setting the return pressure has one filter 30 and one temperature sensor 32 each.
- Each of the devices 10 for setting the return pressure is designed to set / regulate the return pressure to each return pressure value of a set of values with at least two different return pressure values, the devices 10 for setting the return pressure simultaneously different return pressures in their respective return line 14 (at least between the first end 14a of the respective return line and the respective electrically adjustable throttle valve 20) can set / regulate at the same time.
- the return block of the Fig. 2 can therefore be used for different types of injectors and different generations of injectors at the same time.
- the return block preferably also has at least one controller 24, which is designed to send at least one control signal 26 with a modulated pulse width for clocked control of the at least one assigned Output common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
- the return block can also be used as a measuring device for measuring the injection quantity and / or the return quantity (or as a test stand).
- the above-described embodiments of the device 10 for setting the return pressure and of the return block enable universal active pressure setting / pressure regulation by using common motor vehicle components instead of conventional industrial components. This also contributes to reducing costs when realizing the embodiments.
- the embodiments described above enable a high degree of accuracy in the setting / regulation of return pressures (without any appreciable scatter). They thus contribute to increasing the measurement accuracy when measuring the injection quantity 18 and / or the return quantity 16 and to increasing the informative value of the measurement results obtained.
- FIG. 3 shows a flow chart to explain an embodiment of the method for setting the return pressure on at least one injector.
- a return pressure is at least between a first end of a return line, to which a return outlet opening of the injector is connected so that a return amount of the injector flows from the first end of the return line to a second end of the return line, and the valve in the return line set.
- the return pressure is at least reduced by means of an electrically adjustable throttle valve set between the first end of the return line and the electrically adjustable throttle valve in the return line. The return pressure is thus set as a defined pressure in a line between the injector and the electrically adjustable throttle valve.
- the return pressure is preferably set to a first return pressure value at least between the first end of the return line and the electrically adjustable throttle valve in the return line, while for a different / second type of injector, the return pressure is at least between the first end of the return line and the electrically adjustable throttle valve in the return line is set to a different / second return pressure value unequal to the first return pressure value. This can also happen if a target return pressure of the respective type / generation is set simultaneously on several types / generations of injectors.
- a method step S2 can also be carried out simultaneously or at a time overlapping with method step S1, in which an injection quantity and / or a return quantity of the at least one injector are measured.
- the method described here can thus also be referred to as a method for measuring the injection quantity and / or the return quantity on at least one injector.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zur Rücklaufdruckeinstellung für einen Injektor und einen Rücklaufblock für Injektoren. Ebenso betrifft die Erfindung eine Messvorrichtung zur Einspritzmengen- und/oder Rücklaufmengenmessung für mindestens einen Injektor und einen Prüfstand für mindestens einen Injektor. Des Weiteren betrifft die Erfindung ein Verfahren zur Rücklaufdruckeinstellung an zumindest einem Injektor.The invention relates to a device for setting the return pressure for an injector and a return block for injectors. The invention also relates to a measuring device for measuring the injection quantity and / or return quantity for at least one injector and a test stand for at least one injector. The invention also relates to a method for setting the return pressure on at least one injector.
Aus dem Stand der Technik sind Prüfstände für Injektoren (Einspritzventile) und Einspritzpumpen, wie beispielsweise der Prüfstand EPS 815 von Robert Bosch GmbH, bekannt. In der Regel wird bei einer Untersuchung eines Injektors nicht nur eine Einspritzmenge, sondern auch unter Anlegung eines Rücklaufdrucks eine Rücklaufmenge gemessen.Test stands for injectors (injection valves) and injection pumps, such as the test stand EPS 815 from Robert Bosch GmbH, are known from the prior art. As a rule, when an injector is examined, not only an injection quantity but also a return quantity is measured with the application of a return pressure.
In der
Die Erfindung schafft eine Vorrichtung zur Rücklaufdruckeinstellung für einen Injektor mit den Merkmalen des Anspruchs 1, einen Rücklaufblock für Injektoren mit denThe invention creates a device for setting the return pressure for an injector with the features of
Merkmalen des Anspruchs 6, eine Messvorrichtung zur Einspritzmengen- und/oder Rücklaufmengenmessung für mindestens einen Injektor mit den Merkmalen des Anspruchs 8, einen Prüfstand für mindestens einen Injektor mit den Merkmalen des Anspruchs 9 und ein Verfahren zur Rücklaufdruckeinstellung an zumindest einem Injektor mit den Merkmalen des Anspruchs 10.Features of claim 6, a measuring device for injection quantity and / or return quantity measurement for at least one injector with the features of claim 8, a test stand for at least one injector with the features of claim 9 and a method for setting the return pressure on at least one injector with the features of
Die Verwendung des elektrisch verstellbaren Drosselventils zum Einstellen/Einregeln des Rücklaufdrucks ist relativ toleranzfrei, wodurch Ungenauigkeiten beim Einstellen/Einregeln des Rücklaufdrucks vermieden/auf ein Minimum reduziert werden. Insbesondere gegenüber herkömmlichen mechanischen Druckhalteventilen, welche gemäß dem Stand der Technik in der Regel zum Einstellen/Einregeln des Rücklaufdrucks (eventuell zusammen mit einem Schaltventil) verwendet werden, lässt sich mittels des elektrisch verstellbaren Drosselventils der Rücklaufdruck genauer/verlässlicher einstellen/einregeln. Da eine Abweichung des Rücklaufdrucks von einem Soll-Rücklaufdruck bei manchen Injektortypen zu einer Variation einer Einspritzmenge und/oder der Rücklaufmenge führt, kann mittels der verbesserten Genauigkeit des eingestellten/eingeregelten Rücklaufdrucks auch eine Qualität der Messungen der Einspritzmenge und/oder der Rücklaufmenge gesteigert (bzw. Messabweichungen beim Messen der Einspritzmenge und/oder der Rücklaufmenge reduziert) werden.The use of the electrically adjustable throttle valve for setting / regulating the return pressure is relatively tolerance-free, as a result of which inaccuracies in setting / regulating the return pressure are avoided / reduced to a minimum. In particular compared to conventional mechanical pressure control valves, which according to the prior art are usually used to set / regulate the return pressure (possibly together with a switching valve), the return pressure can be set / regulated more precisely / more reliably by means of the electrically adjustable throttle valve. Since a deviation of the return pressure from a target return pressure leads to a variation of the injection quantity and / or the return quantity in some injector types, the quality of the measurements of the injection quantity and / or the return quantity can also be increased (or increased) by means of the improved accuracy of the set / regulated return pressure . Measurement errors when measuring the injection quantity and / or the return quantity are reduced).
Außerdem ist mittels des elektrisch verstellbaren Drosselventils der Rücklaufdruck zumindest zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil in der Rücklaufleitung wahlweise auf jeden Rücklaufdruckwert einer Wertemenge mit mindestens zwei verschiedenen Rücklaufdruckwerten einstellbar. In der Regel kann der Rücklaufdruck mittels des elektrisch verstellbaren Drosselventils über eine vergleichsweise große Wertemenge von verschiedenen Rücklaufdruckwerten variiert werden, wobei gleichzeitig die vorteilhafte Genauigkeit beim Einstellen/Einregeln des Rücklaufdrucks auf einen Soll-Rücklaufdruck des jeweiligen Injektortyps des an dem ersten Ende angebundenen Injektors gewährleistet bleibt. Die hier beschriebene Vorrichtung zur Rücklaufdruckeinstellung eignet sich deshalb für eine Vielzahl von verschiedenen Injektortypen bzw. Injektorgenerationen, selbst wenn diese unterschiedliche Rücklaufdrücke erfordern/benötigen. Beispielsweise kann mit einer Vielzahl verschiedener Typen von elektrisch verstellbaren Drosselventilen der einstellbare/einregelbare Rücklaufdruck über eine Wertemenge zwischen 0 bar bis 10 bar variiert werden. Die hier beschriebeneIn addition, the electrically adjustable throttle valve can be used to set the return pressure at least between the first end of the return line and the electrically adjustable throttle valve in the return line to each return pressure value of a set of values with at least two different return pressure values. As a rule, the return pressure can be varied by means of the electrically adjustable throttle valve over a comparatively large set of values from different return pressure values, while at the same time ensuring the advantageous accuracy when setting / adjusting the return pressure to a target return pressure of the respective injector type of the injector connected to the first end . The device described here for setting the return pressure is therefore suitable for a large number of applications of different injector types or injector generations, even if they require different return pressures. For example, with a large number of different types of electrically adjustable throttle valves, the adjustable / adjustable return pressure can be varied over a set of values between 0 bar and 10 bar. The one described here
Ausführungsform der Vorrichtung zur Rücklaufdruckeinstellung beseitigt deshalb den herkömmlichen Nachteil, dass bisher für jeden Injektortyp und für jede Injektorgeneration eine eigens dazu spezifizierte Vorrichtung, welche die speziell ausgelegten mechanischen Druckhalteventile aufweist, verwendet werden musste. Ein Betreiber der hier beschriebenen Vorrichtung zur Rücklaufdruckeinstellung braucht deshalb nicht verschiedene Vorrichtungen für verschiedene Injektortypen bzw. Injektorgenerationen. Auch Zusatzbehör ist mittels der hier beschriebenen Vorrichtung zur Rücklaufdruckeinstellung einsparbar. Der Betreiber spart sich somit Geld, Lagerplatz in der Werkstatt und verliert auch keine Rüstzeit (zum Bestücken der von ihm verwendeten Vorrichtung mit dem jeweils passenden Zusatzbehör).Embodiment of the device for setting the return pressure therefore eliminates the conventional disadvantage that up to now a device specifically specified for this purpose, which has the specially designed mechanical pressure control valves, had to be used for each injector type and for each injector generation. An operator of the device described here for setting the return pressure therefore does not need different devices for different injector types or injector generations. Additional equipment can also be saved by means of the device described here for setting the return pressure. The operator thus saves money, storage space in the workshop and does not lose any set-up time (for equipping the device he is using with the appropriate additional equipment).
Beispielsweise kann das elektrisch verstellbare Drosselventil ein Common-Rail-Druckregelventil oder ein Diesel-Common-Rail-Druckregelventil sein. Alternativ kann das elektrisch verstellbare Drosselventil auch ein Hochdruck-Einspritzventil oder ein Benzin-Hochdruck-Einspritzventil sein. Die hier beschriebenen Ventiltypen sind preisgünstige Aktoren. Außerdem können die hier beschriebenen Ventiltypen als elektrisch verstellbares Drosselventil verlässlich in Verbindung mit einem kostengünstigen Standard-Drucksensor (aus dem Kfz-Bereich) zusammenwirken.For example, the electrically adjustable throttle valve can be a common rail pressure control valve or a diesel common rail pressure control valve. Alternatively, the electrically adjustable throttle valve can also be a high pressure injection valve or a gasoline high pressure injection valve. The valve types described here are inexpensive actuators. In addition, the valve types described here can work together reliably as an electrically adjustable throttle valve in conjunction with an inexpensive standard pressure sensor (from the automotive sector).
Insbesondere kann die Vorrichtung eine Steuerung aufweisen, welche dazu ausgelegt ist, mindestens ein Steuersignal mit modulierter Pulsweite zur getakteten Ansteuerung des Common-Rail-Druckregelventils oder Diesel-Common-Rail-Druckregelventils oder Hochdruck-Einspritzventils oder Benzin-Hochdruck-Einspritzventils auszugeben. Damit können die hier aufgezählten Ventiltypen auch zur verlässlichen Einstellung/Einregelung von Rücklaufdrücken im Niederdruckbereich genutzt werden.In particular, the device can have a controller which is designed to output at least one control signal with a modulated pulse width for clocked control of the common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve. This means that the valve types listed here can also be used for the reliable setting / regulation of return pressures in the low-pressure range.
Vorzugsweise umfasst die Vorrichtung auch einen zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil an der Rücklaufleitung angebundenen Drucksensor und/oder einen Temperatursensor. Die Ausstattung der Vorrichtung zur Rücklaufdruckeinstellung mit dem Drucksensor ermöglicht eine Einregelung des Rücklaufdrucks mittels des elektrisch verstellbaren Drosselventils durch "Androsseln", so dass der Rücklaufdruck zumindest zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil in der Rücklaufleitung steigt, bis ein angestrebter Soll-Rücklaufdruck/Zieldruck erreicht ist/wird. Ein zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil entstehender Staudruck kann über den Drucksensor erfasst und für eine entsprechende Regelung des elektrisch verstellbaren Drosselventils genutzt werden. Eine zusätzliche Verwendung des Temperatursensors erlaubt außerdem eine Berücksichtigung von thermodynamischen Einflüssen.The device preferably also comprises a pressure sensor and / or a temperature sensor connected to the return line between the first end of the return line and the electrically adjustable throttle valve. Equipping the device for setting the return pressure with the pressure sensor enables the return pressure to be regulated by means of the electrically adjustable throttle valve by "throttling", so that the Return pressure increases at least between the first end of the return line and the electrically adjustable throttle valve in the return line until a desired target return pressure / target pressure is / is reached. A back pressure that arises between the first end of the return line and the electrically adjustable throttle valve can be detected via the pressure sensor and used for a corresponding regulation of the electrically adjustable throttle valve. An additional use of the temperature sensor also allows thermodynamic influences to be taken into account.
Die vorausgehend beschriebenen Vorteile sind auch bei einem Rücklaufblock für Injektoren mit mindestens zwei derartigen Vorrichtungen zur Rücklaufdruckeinstellung realisiert. Auch der Rücklaufblock kann mindestens eine Steuerung aufweisen, welche dazu ausgelegt ist, mindestens ein Steuersignal mit modulierter Pulsweite zur getakteten Ansteuerung des mindestens einen zugeordneten Common-Rail-Druckregelventils oder Diesel-Common-Rail-Druckregelventils oder Hochdruck-Einspritzventils oder Benzin-Hochdruck-Einspritzventils auszugeben.The advantages described above are also implemented in a return block for injectors with at least two such devices for setting the return pressure. The return block can also have at least one controller which is designed to send at least one control signal with a modulated pulse width for clocked control of the at least one associated common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve to spend.
Auch eine Messvorrichtung zur Einspritzmengen- und/oder Rücklaufmengenmessung für mindestens einen Injektor mit mindestens einer derartigen Vorrichtung zur Rücklaufdruckeinstellung, bzw. einem entsprechenden Rücklaufblock, und mindestens einem Einspritzmengen- und/oder Rücklaufmengensensor, mittels welchem eine Einspritzmenge und/oder die durch die zugeordnete Rücklaufleitung fließende Rücklaufmenge messbar sind, bewirkt die oben beschriebenen Vorteile.Also a measuring device for injection quantity and / or return quantity measurement for at least one injector with at least one such device for return pressure adjustment, or a corresponding return block, and at least one injection quantity and / or return quantity sensor, by means of which an injection quantity and / or the flow rate through the associated return line flowing return volume can be measured, brings about the advantages described above.
Entsprechend sind die oben beschriebenen Vorteile auch mittels eines Prüfstands für mindestens einen Injektor mit einer entsprechenden Messvorrichtung zur Einspritzmengen- und/oder Rücklaufmengenmessung bewirkbar.Correspondingly, the advantages described above can also be brought about by means of a test stand for at least one injector with a corresponding measuring device for measuring the injection quantity and / or the return quantity.
Des Weiteren schafft auch ein Ausführen eines korrespondierenden Verfahrens zur Rücklaufdruckeinstellung an zumindest einem Injektor die oben beschriebenen Vorteile. Es wird ausdrücklich darauf hingewiesen, dass das Verfahren zur Rücklaufdruckeinstellung gemäß den oben beschriebenen Vorrichtungsausführungsformen weiterbildbar ist.Furthermore, executing a corresponding method for setting the return pressure on at least one injector also creates the advantages described above. It is expressly pointed out that the Method for setting the return pressure according to the device embodiments described above can be developed.
Weitere Merkmale und Vorteile der vorliegenden Erfindung werden nachfolgend anhand der Figuren erläutert. Es zeigen:
- Fig. 1
- eine schematische Darstellung einer Ausführungsform der Vorrichtung zur Rücklaufdruckeinstellung;
- Fig. 2
- eine schematische Darstellung einer Ausführungsform des Rücklaufblocks; und
- Fig. 3
- ein Flussdiagramm zum Erläutern einer Ausführungsform des Verfahrens zur Rücklaufdruckeinstellung an zumindest einem Injektor.
- Fig. 1
- a schematic representation of an embodiment of the device for setting the return pressure;
- Fig. 2
- a schematic representation of an embodiment of the return block; and
- Fig. 3
- a flowchart for explaining an embodiment of the method for setting the return pressure on at least one injector.
Die in
Die Vorrichtung 10 zur Rücklaufdruckeinstellung weist eine Rücklaufleitung 14 auf. Eine Rücklaufaustrittsöffnung 12a des Injektors 12, aus welcher eine Rücklaufmenge 16 des Injektors 12 aus dem Injektor 12 austritt, ist (direkt oder indirekt) an einem ersten Ende 14a der Rücklaufleitung 14 so anbindbar/angebunden, dass die Rücklaufmenge 16 des Injektors 12 von dem ersten Ende 14a der Rücklaufleitung 14 zu einem zweiten Ende 14b der Rücklaufleitung 14 fließt. Als Alternative zu einer direkten Anbindung der Rücklaufaustrittsöffnung 12a an das erste Ende 14a der Rücklaufleitung 14, bei welcher die Rücklaufaustrittsöffnung 12a das erste Ende 14a der Rücklaufleitung 14 kontaktiert, kann die Rücklaufaustrittsöffnung 12a auch über mindestens eine Verbindungskomponente an dem ersten Ende 14a der Rücklaufleitung 14 anbindbar/angebunden sein. (Eine Anbindung einer Einspritzöffnung 12b des Injektors 12, durch welche eine Einspritzmenge 18 des Injektors 12 aus dem Injektor 12 austritt, an die Rücklaufleitung 14 erfolgt nicht.)The
Die Vorrichtung 10 zur Rücklaufdruckeinstellung umfasst auch ein elektrisch verstellbares Drosselventil 20, mittels welchem ein Rücklaufdruck zumindest zwischen dem ersten Ende 14a der Rücklaufleitung 14 mit dem angebundenen Injektor 12 und dem elektrisch verstellbaren Drosselventil 20 in der Rücklaufleitung 14 einstellbar ist. (Der Rücklaufdruck liegt somit als ein definierter Druck zwischen dem Injektor 12 und dem elektrisch verstellbaren Drosselventil 20 vor.) Die Verwendung des elektrisch verstellbaren Drosselventils 20 erlaubt eine hohe Genauigkeit bei einem Einstellen/Einregeln des Rücklaufdrucks. Insbesondere kann der Rücklaufdruck verlässlich gleich einem gewünschten/vorgegebenen Soll-Rücklaufdruck eingestellt/eingeregelt werden. In der Regel ist außerdem mittels des elektrisch verstellbaren Drosselventils 20 der Rücklaufdruck (zumindest zwischen dem ersten Ende 14a der Rücklaufleitung und dem elektrisch verstellbaren Drosselventils 20) in der Rücklaufleitung 14 wahlweise auf jeden Rücklaufdruckwert einer Wertemenge mit mindestens zwei verschiedenen Rücklaufdruckwerten einstellbar. Deshalb kann die Vorrichtung 10 zur Rücklaufdruckeinstellung auch für verschiedene Injektortypen und unterschiedliche Injektorgenerationen eingesetzt werden, selbst wenn deren gewünschte/vorgegebene Soll-Rücklaufdrücke voneinander abweichen. Eine Verwendung der Vorrichtung 10 zur Rücklaufdruckeinstellung ermöglicht deshalb die oben schon erläuterten Vorteile zur Kostenreduzierung, Rüstzeiteinsparung und Platzbedarfreduzierung.The
Vorzugsweise umfasst die Vorrichtung 10 zur Rücklaufdruckeinstellung auch einen zwischen dem ersten Ende 14a der Rücklaufleitung 14 und dem elektrisch verstellbaren Drosselventil 20 an der Rücklaufleitung 14 angebundenen Drucksensor 22. In diesem Fall ist auch eine Einregelung des Rücklaufdrucks mittels eines Zusammenwirkens des elektrisch verstellbaren Drosselventils 20 und des Drucksensors 22 möglich. Ergänzend kann die Vorrichtung 10 zur Rücklaufdruckeinstellung auch einen (in
Das elektrisch verstellbare Drosselventil 20 kann beispielsweise ein Common-Rail-Druckregelventil (bzw. ein Diesel-Common-Rail-Druckregelventil) sein. Obwohl ein (Diesel-)Common-Rail-Druckregelventil (als Hydraulikproportionalventil) für vergleichsweise hohe Drücke (je nach Typ zwischen 1800 bar und 2500 bar) konzipiert ist, ist mittels einer getakteten Ansteuerung des (Diesel-)Common-Rail-Druckregelventils mit einer Modulation von Pulsweiten auch eine Wertemenge von gebräuchlichen Soll-Rücklaufdrücken (zumindest zwischen dem ersten Ende 14a der Rücklaufleitung und dem elektrisch verstellbaren Drosselventils 20) in der Rücklaufleitung 14 bewirkbar. Damit sind selbst Rücklaufdrücke im Niederdruckbereich (zwischen 0 bar bis 10 bar) bewirkbar und verlässlich einhaltbar. Vorzugsweise ist deshalb eine Steuerung 24 der Vorrichtung 10 zur Rücklaufdruckeinstellung dazu ausgelegt, mindestens ein Steuersignal 26 mit modulierter Pulsweite zur getakteten Ansteuerung des (Diesel-)Common-Rail-Druckregelventils auszugeben.The electrically
Vorteilhaft ist es auch, wenn das elektrisch verstellbare Drosselventil 20 ein Hochdruck-Einspritzventil (bzw. ein Benzin-Hochdruck-Einspritzventil) ist. Zum Einstellen/Einregeln des Rücklaufdrucks kann das (Benzin-)Hochdruck-Einspritzventil von der Ansteuerung 24 mittels mindestens eines Steuersignals 26 (z.B. eines einfachen Rechtecksignals) mit modulierter Pulsweite ansteuerbar sein/angesteuert werden. Eine Ansteuerung des (Benzin-)Hochdruck-Einspritzventils mittels komplexer Ansteuersignale, was eine aufwändige Endstufe zur Erzeugung der komplexen Ansteuersignale voraussetzt, ist nicht notwendig.It is also advantageous if the electrically
Die vorausgehend aufgezählten Ausführungsbeispiele für das elektrisch verstellbare Drosselventil 20 ermöglichen eine Druckeinstellung/Druckregelung ohne einen aufwändigen Ansteueraufwand und ohne hohe Zusatzkosten. Dies bewirkt auch eine deutliche Verringerung eines Produktpflegeaufwands während eines Betriebs der Vorrichtung 10 zur Rücklaufdruckeinstellung.The exemplary embodiments listed above for the electrically
In einer Weiterbildung der Vorrichtung 10 zur Rücklaufdruckeinstellung (als Messvorrichtung zur Einspritzmengen- und/oder Rücklaufmengenmessung) kann noch ein Einspritzmengen- und/oder Rücklaufmengensensor 28, mittels welchem die Einspritzmenge 18 und/oder die durch die Rücklaufleitung 14 fließende Rücklaufmenge 16 messbar sind, an der Vorrichtung 10 zur Rücklaufdruckeinstellung ausgebildet sein. Die Vorrichtung 10 zur Rücklaufdruckeinstellung ist damit vielseitig einsetzbar. Die Vorrichtung 10 zur Rücklaufdruckeinstellung kann beispielsweise Teil eines Prüfstands sein.In a further development of the
Der in
Vorzugsweise weist auch der Rücklaufblock mindestens eine Steuerung 24 auf, welche dazu ausgelegt ist, mindestens ein Steuersignal 26 mit modulierter Pulsweite zur getakteten Ansteuerung des mindestens einen zugeordneten Common-Rail-Druckregelventils oder Diesel-Common-Rail-Druckregelventils oder Hochdruck-Einspritzventils oder Benzin-Hochdruck-Einspritzventils auszugeben. Wie in
Die oben beschriebenen Ausführungsformen der Vorrichtung 10 zur Rücklaufdruckeinstellung und des Rücklaufblocks ermöglichen eine universelle aktive Druckeinstellung/Druckregelung durch Einsatz von gängigen Kraftfahrzeugkomponenten anstatt herkömmlicher Industriekomponenten. Auch dies trägt zur Kostenreduzierung bei der Realisierung der Ausführungsformen bei.The above-described embodiments of the
Die oben beschriebenen Ausführungsformen ermöglichen eine hohe Genauigkeit bei der Einstellung/Einregelung von Rücklaufdrücken (ohne eine nennenswerte Streuung). Damit tragen sie zur Steigerung einer Messgenauigkeit bei einem Messen der Einspritzmenge 18 und/oder der Rücklaufmenge 16 und zur Steigerung einer Aussagekraft von erhaltenen Messergebnissen bei.The embodiments described above enable a high degree of accuracy in the setting / regulation of return pressures (without any appreciable scatter). They thus contribute to increasing the measurement accuracy when measuring the
Alle oben beschriebenen Ausführungsformen ermöglichen einen Verzicht auf Zusatzbehör, so dass Zusatzkosten für das Zusatzbehör eingespart werden können und ein herkömmlicher Aufwand zur entwicklungsseitigen Produktpflege entfällt. Ebenso können Rüstzeiten eingespart werden und eine zur Lagerung des Zusatzbehörs nicht mehr benötigte Werkstattfläche kann anderweitig genutzt werden.All of the above-described embodiments make it possible to dispense with additional authority, so that additional costs for the additional authority can be saved and the conventional effort for product maintenance on the development side is dispensed with. Set-up times can also be saved and workshop space that is no longer required for storing the additional equipment can be used for other purposes.
In einem Verfahrensschritt S1 wird ein Rücklaufdruck zumindest zwischen einem ersten Ende einer Rücklaufleitung, an welchem eine Rücklaufaustrittsöffnung des Injektors so angebunden ist, dass eine Rücklaufmenge des Injektors von dem ersten Ende der Rücklaufleitung zu einem zweiten Ende der Rücklaufleitung fließt, und dem Ventil in der Rücklaufleitung eingestellt. Dazu wird der Rücklaufdruck mittels eines elektrisch verstellbaren Drosselventils zumindest zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil in der Rücklaufleitung eingestellt. In einem Leitungsstrang zwischen dem Injektor und dem elektrisch verstellbaren Drosselventil stellt sich damit der Rücklaufdruck als definierter Druck ein.In a method step S1, a return pressure is at least between a first end of a return line, to which a return outlet opening of the injector is connected so that a return amount of the injector flows from the first end of the return line to a second end of the return line, and the valve in the return line set. For this purpose, the return pressure is at least reduced by means of an electrically adjustable throttle valve set between the first end of the return line and the electrically adjustable throttle valve in the return line. The return pressure is thus set as a defined pressure in a line between the injector and the electrically adjustable throttle valve.
Vorzugsweise wird für einen ersten Typ des Injektors der Rücklaufdruck zumindest zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil in der Rücklaufleitung auf einen ersten Rücklaufdruckwert eingestellt, während für einen von dem ersten Typ abweichenden anderen/zweiten Typ des Injektors der Rücklaufdruck zumindest zwischen dem ersten Ende der Rücklaufleitung und dem elektrisch verstellbaren Drosselventil in der Rücklaufleitung auf einen anderen/zweiten Rücklaufdruckwert ungleich dem ersten Rücklaufdruckwert eingestellt wird. Dies kann auch geschehen, wenn an mehreren Typen/Generationen von Injektoren jeweils ein Soll-Rücklaufdruck des jeweiligen Typs/der jeweiligen Generation gleichzeitig eingestellt wird.For a first type of injector, the return pressure is preferably set to a first return pressure value at least between the first end of the return line and the electrically adjustable throttle valve in the return line, while for a different / second type of injector, the return pressure is at least between the first end of the return line and the electrically adjustable throttle valve in the return line is set to a different / second return pressure value unequal to the first return pressure value. This can also happen if a target return pressure of the respective type / generation is set simultaneously on several types / generations of injectors.
Optionaler Weise kann gleichzeitig oder zeitlich überschneidend mit dem Verfahrensschritt S1 noch ein Verfahrensschritt S2 ausgeführt werden, in welchem eine Einspritzmenge und/oder eine Rücklaufmenge des zumindest einen Injektors gemessen werden. Das hier beschriebene Verfahren kann somit auch als ein Verfahren zur Einspritzmengen- und/oder Rücklaufmengenmessung an mindestens einem Injektor bezeichnet werden.Optionally, a method step S2 can also be carried out simultaneously or at a time overlapping with method step S1, in which an injection quantity and / or a return quantity of the at least one injector are measured. The method described here can thus also be referred to as a method for measuring the injection quantity and / or the return quantity on at least one injector.
Claims (10)
- Device (10) for return pressure setting for an injector (12), having:a return line (14) with a first end (14a), to which a return outlet opening (12a) of the injector (12) is directly or indirectly connectable such that a return quantity (16) of the injector (12) flows from the first end (14a) of the return line (14) to a second end (14b) of the return line (14); andat least one valve (20), by means of which a return pressure at least between the first end (14a) of the return line (14) with the connected injector (12) and the valve (20) in the return line (14) can be set;wherein the device (10) has an electrically adjustable throttle valve (20) as the valve (20), wherein, by means of the electrically adjustable throttle valve (20), the return pressure at least between the first end (14a) of the return line (14) with the connected injector (12) and the electrically adjustable throttle valve (20) in the return line (14) can be selectively set to any return pressure value of a value set with at least two different return pressure values,characterized in thatthe device (10) for return pressure setting can be used for different injector types and different injector generations, the specified setpoint return pressures of which differ from one another, by virtue of the return pressure at least between the first end (14a) of the return line (14) and the electrically adjustable throttle valve (20) being settable or adjustable to a value equal to a specified setpoint return pressure of the injector (12) .
- Device (10) for return pressure setting according to Claim 1, wherein the electrically adjustable throttle valve (20) is a common-rail pressure control valve or a diesel common-rail pressure control valve.
- Device (10) for return pressure setting according to Claim 1, wherein the electrically adjustable throttle valve (20) is a high-pressure injection valve or a gasoline high-pressure injection valve.
- Device (10) for return pressure setting according to Claim 2 or 3, wherein the device (10) has a controller (24) which is configured for outputting at least one pulse-width-modulated control signal (26) for the clocked actuation of the common-rail pressure control valve or diesel common-rail pressure control valve or high-pressure injection valve or gasoline high-pressure injection valve.
- Device (10) for return pressure setting according to any of the preceding claims, wherein the device (10) comprises a pressure sensor (22), which is connected to the return line (14) between the first end (14a) of the return line (14) and the electrically adjustable throttle valve (20), and/or a temperature sensor (32).
- Return block for injectors (12), having at least two devices (10) for return pressure setting according to any of Claims 1 to 3 and 4.
- Return block according to Claim 2 and/or 3 and Claim 6, wherein the return block has at least one controller (24) which is configured for outputting at least one pulse-width-modulated control signal (26) for the clocked actuation of the at least one associated common-rail pressure control valve or diesel common-rail pressure control valve or high-pressure injection valve or gasoline high-pressure injection valve.
- Measuring device for injection quantity and/or return quantity measurement for at least one injector (12), having:at least one device (10) for return pressure setting according to any of Claims 1 to 5 or a return block according to Claim 6 or 7; andat least one injection quantity and/or return quantity sensor (28), by means of which an injection quantity (18) and/or the return quantity (16) flowing through the associated return line (14) can be measured.
- Test stand for at least one injector (12), having a measuring device for injection quantity and/or return quantity measurement according to Claim 8.
- Method for return pressure setting at at least one injector (12), having the step:setting a return pressure by means of at least one valve (20) at least between a first end (14a) of a return line (14), to which a return outlet opening (12a) of the injector (12) is connected such that a return quantity (16) of the injector (12) flows from the first end (14a) of the return line (14) to a second end (14b) of the return line (14), and the valve (20) in the return line (14);wherein the return pressure is set (S1) by means of an electrically adjustable throttle valve (20) as the valve (20) at least between the first end (14a) of the return line (14) with the connected injector (12) and the electrically adjustable throttle valve (20) in the return line (14),characterized in that,for a first type of the injector (12), the return pressure at least between the first end (14a) of the return line (14) and the electrically adjustable throttle valve (20) in the return line (14) is set to a first return pressure value and, for a second type, which differs from the first type, of the injector (12), the return pressure at least between the first end (14a) of the return line (14) and the electrically adjustable throttle valve (20) in the return line (14) is set to a second return pressure value which is not equal to the first return pressure value.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017210147.4A DE102017210147A1 (en) | 2017-06-19 | 2017-06-19 | Apparatus and method for return pressure adjustment for an injector |
PCT/EP2018/063886 WO2018233980A1 (en) | 2017-06-19 | 2018-05-28 | Device and method for return pressure adjustment for an injector |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3642472A1 EP3642472A1 (en) | 2020-04-29 |
EP3642472B1 true EP3642472B1 (en) | 2021-07-07 |
Family
ID=62455465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18728098.7A Active EP3642472B1 (en) | 2017-06-19 | 2018-05-28 | Device and method for return pressure adjustment for an injector |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3642472B1 (en) |
CN (1) | CN110945232B (en) |
BR (1) | BR112019026976B1 (en) |
DE (1) | DE102017210147A1 (en) |
RU (1) | RU2770084C2 (en) |
WO (1) | WO2018233980A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH689281A5 (en) * | 1994-02-03 | 1999-01-29 | Christian Dipl-Ing Eth Mathis | Fuel injection system for an internal combustion engine, especially for a diesel engine, and a method for monitoring the same. |
RU2116497C1 (en) * | 1996-05-21 | 1998-07-27 | Башкирский государственный аграрный университет | Device for metering cyclic fuel feed |
IT1293433B1 (en) * | 1997-07-11 | 1999-03-01 | Elasis Sistema Ricerca Fiat | ADJUSTABLE DOSING VALVE FOR A FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES, AND RELEVANT ADJUSTMENT METHOD. |
DE102007052092B4 (en) * | 2007-10-31 | 2011-06-01 | Continental Automotive Gmbh | Method and fuel system for controlling the fuel supply for an internal combustion engine |
DE102008042154A1 (en) * | 2008-09-17 | 2010-03-18 | Robert Bosch Gmbh | Fuel injector |
DE102011086681A1 (en) * | 2011-11-21 | 2013-05-23 | Robert Bosch Gmbh | Fuel feed system for a vehicle |
DE102014217443A1 (en) * | 2014-09-01 | 2016-03-03 | Robert Bosch Gmbh | Test procedure for high pressure pumps |
DE102015209377B4 (en) * | 2015-05-21 | 2017-05-11 | Mtu Friedrichshafen Gmbh | Injection system for an internal combustion engine and internal combustion engine with such an injection system |
-
2017
- 2017-06-19 DE DE102017210147.4A patent/DE102017210147A1/en not_active Withdrawn
-
2018
- 2018-05-28 BR BR112019026976-2A patent/BR112019026976B1/en active IP Right Grant
- 2018-05-28 EP EP18728098.7A patent/EP3642472B1/en active Active
- 2018-05-28 CN CN201880053536.6A patent/CN110945232B/en active Active
- 2018-05-28 WO PCT/EP2018/063886 patent/WO2018233980A1/en unknown
- 2018-05-28 RU RU2020100580A patent/RU2770084C2/en active
Also Published As
Publication number | Publication date |
---|---|
CN110945232B (en) | 2022-03-04 |
BR112019026976B1 (en) | 2023-04-11 |
DE102017210147A1 (en) | 2018-12-20 |
RU2770084C2 (en) | 2022-04-14 |
EP3642472A1 (en) | 2020-04-29 |
RU2020100580A (en) | 2021-07-20 |
RU2020100580A3 (en) | 2021-10-18 |
BR112019026976A2 (en) | 2020-06-30 |
WO2018233980A1 (en) | 2018-12-27 |
CN110945232A (en) | 2020-03-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102008051820B4 (en) | Method for correcting injection quantities or durations of a fuel injector | |
EP1303693B1 (en) | Method and device for controlling an internal combustion engine | |
DE102006034514B4 (en) | Method for controlling an internal combustion engine | |
EP1711704B1 (en) | Method for monitoring the operability of a fuel injection system | |
DE10032022B4 (en) | Method for determining the drive voltage for an injection valve with a piezoelectric actuator | |
EP0703362B1 (en) | Process for setting and checking flow in valves | |
EP0811116A1 (en) | Process and device for monitoring a fuel metering system of an internal combustion engine | |
EP1735673B1 (en) | Method for monitoring a fuel supply device pertaining to an internal combustion engine | |
DE10316811A1 (en) | Method for determining the injection period in an internal combustion engine with a map value and a correction value and method for determining the correction value | |
WO2018001675A1 (en) | Method for determining a correction value for metering fuel for a fuel injector | |
DE102006007365B3 (en) | Method for controlling and regulating an internal combustion engine, involves setting of minimum pressurization level from maximum individual accumulator pressure in first step | |
DE102008006327A1 (en) | Method for controlling an internal combustion engine | |
WO1999002837A1 (en) | System for operating an internal combustion engine, in particular of a motor vehicle | |
EP2184473A2 (en) | Method and device for testing a pressure sensor of a fuel injection device | |
DE19857971A1 (en) | Controlling an IC engine esp. for IC engine with common rail fuel injection system so that at least one pump delivers fuel in storage | |
EP3642472B1 (en) | Device and method for return pressure adjustment for an injector | |
DE10339251A1 (en) | Computerized control circuit for internal combustion engine performs individual cylinder lambda regulation by controlling fuel injection for each cylinder for homogenous and stratified charge | |
EP1567758B1 (en) | Method and device for operating an injection system in an internal combustion engine | |
DE102006026876A1 (en) | Method and device for controlling the fuel metering in at least one combustion chamber of an internal combustion engine | |
DE102011006843A1 (en) | Method for checking a function of a rail pressure sensor | |
EP3234328B1 (en) | Method and apparatus for diagnosing a fuel supply system | |
EP2080885A2 (en) | Method and device for monitoring a motor control unit | |
DE102007058228A1 (en) | Method for determining deviation of actual pre or post injection quantity from target pre or post injection quantity in injection system of internal combustion engine, involves measuring regulated target injection quantity | |
DE10309720A1 (en) | Motor vehicle internal combustion engine fuel injection control uses fuel feed measurement at injector with pressure variations compared to stored values | |
DE10305525A1 (en) | Method and device for adapting the pressure wave correction in a high-pressure injection system of a motor vehicle while driving |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
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 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20200120 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20210310 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1408818 Country of ref document: AT Kind code of ref document: T Effective date: 20210715 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502018006048 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: RO Ref legal event code: EPE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20210707 Ref country code: GR Ref legal event code: EP Ref document number: 20210402080 Country of ref document: GR Effective date: 20211013 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT 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: 20210707 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: 20211007 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: 20211108 Ref country code: NO 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: 20211007 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: 20210707 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: 20210707 Ref country code: RS 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: 20210707 Ref country code: HR 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: 20210707 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: 20210707 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: 20210707 |
|
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: 20210707 Ref country code: LV 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: 20210707 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502018006048 Country of ref document: DE |
|
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: 20210707 |
|
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: SM 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: 20210707 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: 20210707 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: 20210707 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: 20210707 Ref country code: AL 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: 20210707 |
|
26N | No opposition filed |
Effective date: 20220408 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20220531 |
|
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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210707 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220528 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220531 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220531 |
|
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: 20220528 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220531 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20220531 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: RO Payment date: 20230518 Year of fee payment: 6 Ref country code: IT Payment date: 20230531 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20230523 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230726 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK 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: 20210707 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: 20210707 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
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; INVALID AB INITIO Effective date: 20180528 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20240522 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GR Payment date: 20240517 Year of fee payment: 7 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1408818 Country of ref document: AT Kind code of ref document: T Effective date: 20230528 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20230528 |