WO2020150760A1 - Dispositif de régulation de pression pour système de mesure de consommation de carburant - Google Patents

Dispositif de régulation de pression pour système de mesure de consommation de carburant Download PDF

Info

Publication number
WO2020150760A1
WO2020150760A1 PCT/AT2020/060017 AT2020060017W WO2020150760A1 WO 2020150760 A1 WO2020150760 A1 WO 2020150760A1 AT 2020060017 W AT2020060017 W AT 2020060017W WO 2020150760 A1 WO2020150760 A1 WO 2020150760A1
Authority
WO
WIPO (PCT)
Prior art keywords
check valve
fuel
pressure
flow
closing body
Prior art date
Application number
PCT/AT2020/060017
Other languages
German (de)
English (en)
Inventor
Michael Buchner
André STEINHÖFLER
Otfried Derschmidt
Christoph SCHEROUNIGG
Original Assignee
Avl List Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Publication of WO2020150760A1 publication Critical patent/WO2020150760A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel system
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • 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
    • F02M63/0054—Check valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005—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
    • 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

Definitions

  • the invention relates to a pressure control device for a fuel consumption measuring system with a fuel supply line which can be connected to a consumer and via which fuel can be supplied to the consumer, a fuel return line via which fuel can be returned, a bypass line via which the fuel supply line is fluidly connected to the fuel return line. and via which fuel can be conducted from the fuel supply line, bypassing the consumer, to the fuel return line, a pressure regulator, via which a free flow cross section in the bypass line can be set, and a check valve, which is in the fuel supply line downstream of the branching of the bypass line and upstream of a pressure sensor which is electrical is connected to a control unit, via which the pressure regulator can be regulated as a function of the measured values of the pressure sensor.
  • Fuel consumption measuring systems usually consist of a module which carries out the actual measurement of the fuel flow, which can be done using flow meters such as Coriolis meters or piston / displacement meter units connected in parallel, as described for example in DE-AS 1 798 080, and at Measuring systems that have a fuel return, additionally from a conditioning module, via which a constant pressure in the fuel supply line is set.
  • flow meters such as Coriolis meters or piston / displacement meter units connected in parallel, as described for example in DE-AS 1 798 080
  • Measuring systems that have a fuel return, additionally from a conditioning module, via which a constant pressure in the fuel supply line is set.
  • These systems for measuring fuel consumption with a pressure control device are installed, for example, in front of the high-pressure fuel pump of a common rail system of an internal combustion engine with a plurality of injection valves arranged. These are either closed circuits in which the fuel is conveyed from the fuel return line downstream of the actual measuring device back into the fuel supply line or systems in which a return line is provided directly to the tank and a second flow meter is arranged in it, so that the Fuel consumption can be calculated from the difference between the two flow meters.
  • active pressure regulating devices have been developed in which, in addition to the pressure regulator in the bypass line, a further pressure regulator in the form of a pressure reducer is arranged in the fuel supply line. While the pressure control in the positive pressure range continues via the overflow valve, a setpoint of the supply pressure in the negative range, which is in its fully open position without the effect of a pressure, can be moved into a position that throttles or even closes the flow cross-section that an increased pressure drop is generated which means that a vacuum pressure can be generated in the downstream branch line.
  • the operating pressure required for this pressure reducer can be built up using the overflow valve.
  • a disadvantage of such an embodiment is that two control elements are required in order to also be able to implement zero pressures or vacuum pressures which additionally influence one another, which makes it difficult to precisely regulate the supply pressure to a constant actual value. Accordingly, the investment in realizing such a pressure control is high.
  • the pressure control unit has a pressure sensor which is arranged on the fuel supply line downstream of the branching of the bypass line, so that the pressure regulator can be controlled as a function of the measured values of the pressure sensor.
  • a check valve is arranged in the fuel supply line upstream of the pressure sensor and downstream of the branch of the bypass line, which can be bypassed via a bypass line.
  • the pressure-reducing element can also set a pressure below atmospheric pressure or atmospheric pressure without the need for additional control elements.
  • a pressure control device for a fuel consumption measuring system with the features of claim 1.
  • the check valve has two flow openings, of which the first flow opening can be flowed through by means of a first closing body from a first defined pressure difference in the opening direction of the check valve from the inlet to the outlet of the check valve and the second flow opening at least from a second defined pressure difference in the closing direction of the check valve from An outlet of the check valve can flow through to an inlet of the check valve, a system is created in which the volume created in the lines by thermal expansion can be drained in the direction of the inlet of the check valve.
  • the bypass line in the known system for bypassing the non-return valve can be dispensed with, and nevertheless a complete ventilation of the system is possible, so that air bubbles that lead to a falsification of the measurement results are prevented.
  • a through bore is preferably formed on the closing body of the check valve, which forms the second flow opening and via which the inlet of the check valve is continuously fluidly connected to the outlet of the check valve.
  • one or more grooves are formed on the circumference of the closing body of the check valve, which form the second flow opening and via which the inlet of the check valve is fluidly connected to the outlet of the check valve. Even with small dimensions, such grooves are less likely to clog.
  • one or more grooves are formed on the valve seat of the check valve, which form the second flow opening and via which the inlet of the check valve also coexists the outlet of the check valve is constantly fluidly connected. These grooves can also be easily retrofitted in order to achieve the desired possible flow from the outlet to the inlet.
  • a smaller, second check valve is arranged in the first closing body of the first check valve, which has the second flow opening, which is dominated by a second closing body, so that the first, larger check valve in its closing direction from a defined pressure difference from Outlet of the first, larger check valve to the inlet of the first larger check valve is flowed through the flow opening of the second check valve.
  • the term larger non-return valve is understood to mean the valve which releases the fuel flow in the direction of the consumer via the fuel supply line for the application in the actual fuel measurement from a defined pending pressure difference.
  • smaller non-return valve is understood to mean the non-return valve installed in the larger non-return valve, which is always closed in the direction of the consumer and only opens in the opposite direction when there is a corresponding pressure difference between the outlet and the inlet.
  • This smaller check valve can therefore only be used for backflow.
  • significantly larger cross-sections can be released from the opening pressure of the smaller check valve, which means that even a large volume, such as occurs in the event of a sudden drop in load on the common rail system, can be reduced significantly faster.
  • the terms smaller and larger refer accordingly to the possible maximum flows through the opening cross-sections of the two check valves.
  • the maximum flow of the larger check valve is correspondingly greater than the maximum flow of the smaller check valve.
  • This version has compared to the solutions with The grooves and the through hole have the great advantage that in normal operation, i.e. a pressure difference from the inlet to the outlet and thus a flow from the inlet to the outlet of the larger check valve, tightness is guaranteed until the opening pressure of the larger check valve is reached.
  • the actual function of the pressure control device is thus retained in full, and yet the fuel measuring device remains insensitive to a thermal pressure increase or sudden changes in volume when the load on the common rail system changes. at standstill. Complete venting even with the smallest volume flows remains possible. The pressure control device thus remains very precise even in the case of low volume flows in measuring operation.
  • a passage opening is formed in the closing body of the smaller check valve or on the valve seat of the smaller check valve which is smaller than the second flow opening which can be shut off by the second, smaller check valve. If necessary, this can bring about advantages in the regulation.
  • the closing body of the larger check valve is hollow-cylindrical and has a base at one axial end, in which a hole is formed in which the smaller check valve is fastened.
  • a plurality of openings are formed in the outer surface of the hollow cylinder of the closing body of the larger check valve, via which the interior of the hollow cylinder is fluidly connected to the exterior of the hollow cylinder. These openings can be flowed through in both directions, so that the Closing body can be achieved in its housing and at the same time the pressure loss when flowing through the check valve can be minimized, since a larger free cross section is provided.
  • the diameter of the second flow opening is 0.05 to 0.2 mm.
  • Such opening sizes only have a mostly negligible influence on the flow characteristics and control of the pressure control device and thus also the resulting measured values, but they are still economically producible and do not tend to clog too much, so that the functionality remains intact.
  • a pressure control device for a fuel consumption measuring system is thus made available, with which time-resolved flow processes can be determined with high accuracy and continuously, by measuring an accurate supply pressure in the fuel supply line and controlling it in accordance with these measured values. Damage to the fuel consumption measuring system or to the consumer is reliably avoided by the invention. Measurement errors due to air pockets are also avoided by the possibility of a complete venting of the pressure control device.
  • the pressure control device according to the invention can be manufactured and assembled economically.
  • a fuel consumption measuring system with the pressure control device according to the invention is shown in the figures and is described below with reference to the figures.
  • FIG. 1 shows a flow diagram of a fuel consumption measuring system with a pressure control unit according to the invention.
  • FIG. 2 shows a side view of a check valve with a second flow opening.
  • FIG. 3 shows a side view of a check valve with an integrated second check valve.
  • the fuel consumption measuring system shown in Figure 1 consists of a tank 10 in which fuel is stored. Fuel is pumped from this tank 10 into a fuel supply line 14 by means of a first fuel pump 12.
  • the fuel supply line 14 leads to a consumer 16, which in this exemplary embodiment is designed as an internal combustion engine 18 with a common rail injection system.
  • the fuel supply line 14 leads to a feed pump 20 designed as a flute pressure pump, which is part of the internal combustion engine and via which the fuel is conveyed and compressed into a common rail distributor pipe 22.
  • the distributor pipe 22 is fluidly connected to injection valves 24, via which the fuel is injected into the combustion chambers of the internal combustion engine 18.
  • a fuel return line 26 branches off from the distributor pipe 22 and leads back into the fuel supply line 14.
  • the returned fuel quantities can be a multiple of the injected fuel quantities.
  • a flow meter 28 is arranged in the fuel supply line 14.
  • This can be designed, for example, as a Coriolis knife or, for example, by formwork in parallel with a displacement counter with a movable piston.
  • the rotary displacement counter would be arranged in the fuel supply line 14 for the measurement, which counter by means of a drive motor is driven.
  • an inertia-displaceable piston is arranged in the parallel line to the displacer. A change in the volume flow in the fuel supply line 14 initially results in a deflection of the piston, which is measured by means of a displacement sensor.
  • the measured values are made available to a control unit, which records the values of this displacement sensor and transmits corresponding control signals to the drive motor, which is controlled in such a way that the piston is always moved back to its defined starting position, i.e. the volume flow is always discharged as precisely as possible via the rotary displacer . Since each speed of the rotary displacer can be assigned a volume delivered in the time interval, it is accordingly possible to calculate a fuel consumption from these values.
  • the flow meter measures the fuel consumption in the fuel supply line 14.
  • the fuel return line 26, which leads back to the fuel supply line 14, opens downstream of the flow meter 28 and upstream of a feed pump 29 into the fuel supply line 14 in order to avoid a double measurement of this fuel and to be able to deliver this fuel. If the consumer 16 consumes little fuel, only small amounts of fuel need to be supplied to the measuring system via the fuel pump 12, which is why a further return line 30 branches off from the fuel supply line 14 upstream of the flow meter 28 and via which fuel can be returned to the tank 10 if a sufficient pressure in the fuel supply line 14 is present.
  • a mechanical pressure regulator 31 is arranged in this further return line 30, via which the pressure upstream of the flow meter 28 is set.
  • a pressure control device 32 which has a bypass line 34 which branches off from the fuel supply line 14 and opens into the fuel return line 26, the branch downstream of the flow meter 28 and downstream of the mouth of the fuel return line 26 into the fuel supply line 14 and downstream of the Delivery pump 29 is arranged.
  • a pressure regulator 36 in the form of a control valve is arranged in this bypass line 34.
  • This pressure regulator 36 has, for example, a regulating body which is loaded by means of a spring away from its valve seat in order to open the flow cross section.
  • This pressure regulator 36 is closed pneumatically, for example, by introducing a pressure into a pressure chamber which is delimited by a membrane connected to the control body, the pressure acting on the membrane counter to the spring force, thereby lowering the control body to its valve seat surrounding the flow cross section as soon as the product of the applied pressure and the area of the membrane is greater than the force of the spring.
  • the pressure control device 32 consists of a check valve 38, which is arranged in the fuel supply line 14 downstream of a branch 40 of the bypass line 34 and opens from a defined first pressure difference and thus allows flow to the consumer 16 from this first pressure difference. Via this check valve 38 there is a pressure drop between its outlet and its inlet, which is dependent only on the flow rate, but largely constant.
  • a pressure sensor 42 is located on the fuel supply line 14 downstream of the check valve 38, but upstream of the feed pump 20 arranged, via which the flow pressure in the fuel supply line 14 is measured.
  • This pressure sensor 42 converts the pressure into a corresponding electrical signal, which is fed to a control unit 44.
  • This control unit 44 serves to control an electrical pilot valve 46, via which a pressure from a pressure vessel 48 or another compressed air supply source is regulated and fed to the pressure regulator 36 or the pressure chamber of the pressure regulator 36.
  • the pressure regulator 36 in the bypass line 34 is regulated as a function of the difference between the actual values of the pressure sensor 42 and target values which are transmitted to the control unit 44.
  • a central control unit now specifies that the fuel consumption should be measured at a supply pressure in the fuel supply line 14 of 1 bar, but the actual actual value measured by the pressure sensor 42 is only 0.5 bar, the pressure regulator 36 is shifted to a further closed position by the pilot valve 46 increasing the pressure delivered into the pressure chamber. The pressure in the fuel supply line 14 thus increases until it corresponds to the desired setpoint. Accordingly, the regulation for reducing the pressure is reversed.
  • the check valve 38 is designed such that it either allows a leakage flow in both directions or at least opens in the closing direction of the check valve 38 from a certain pressure, wherein in the closing direction means that a flow from an outlet 50 towards an inlet 52 of the check valve 38 is made possible.
  • the check valve 38 can be configured in the manner shown in FIG. 2.
  • the check valve 38 has a first flow opening 54, which is formed by a first closing body 56 is mastered, which in the present exemplary embodiment has a hollow cylindrical shape, the axial end of this hollow cylinder facing a valve seat 58, which surrounds the first flow opening 54, having a base 60.
  • This closing body 56 is loaded in the direction of the valve seat 58 by means of a spring 62, which is supported on the floor, so that the check valve 38 only opens when the force acting on the closing body 56 due to the pressure difference applied is that which is exerted by the spring 62 on the closing body 56 acting force exceeds.
  • Openings 66 are formed in the lateral surface 64 of the hollow cylindrical closing body 56, via which the fuel flow can flow from the outer region of the closing body 56 into the inner region in order to minimize the pressure loss occurring at the check valve 38 after opening
  • a through hole 70 serving as a second flow opening 68 and having a diameter of, for example, 0.15 mm is formed in the base 60.
  • a mass flow takes place through this second flow opening 68, which, depending on the pressure difference present, either takes place from inlet 52 to outlet 50 or in the opposite direction.
  • grooves 72 can be formed on the circumference of the closing body 56 or 58 on the inner circumference of the valve seat 58, which are shown in broken lines in FIG. 2 and which serve as a second flow opening 68, via which a continuous fluidic connection is established between the inlet 52 and the outlet 50 of the check valve 38.
  • a second, smaller check valve 38 is arranged within the first, larger check valve 38, the flow opening of which is the second flow opening 68 of the first check valve 38 is used.
  • This second, smaller check valve 76 has an opening direction opposite to the first check valve 38, as shown in FIG. 3.
  • a housing 78 of this check valve 76 is fixed in a hole 80 in the bottom 60 of the closing body 56 of the first check valve 38.
  • a second valve seat 82 is formed in the housing 78, against which a second closing body 84 designed as a ball is loaded by means of a spring 86, it being pointed out that it may also be sensible to dispense with the spring and thus exclusively the valve open and close using the existing pressure differences.
  • this second check valve 76 is also arranged in the flow direction of the fuel in the fuel supply line 14, so that venting can be reliably ensured.
  • This check valve 76 is closed during operation, since it is loaded by the applied pressure difference in the blocking direction when the consumer 16 is supplied.
  • the function of the pressure control device corresponds to the function without the additional check valve 76. If there are volume increases in the fuel or a backflow in the direction of the flow meter 28, that is to say a pressure difference with a driving gradient in the direction of the flow meter 28, the second, smaller check valve 76 opens a defined second pressure difference.
  • volume expansions due to thermal expansion of the fuel or pressure changes on the common rail system which lead to a discharge of a volume in the direction of the pressure control device, can be reduced via the second check valve 76 in the direction of the flow meter and thus damage to the consumer 16 or the lines of the fuel consumption measurement system can be reliably reduced can be avoided without the actual control function of the pressure control device 32 being negatively influenced.
  • exact fuel consumption measurements can thus be carried out over a large pressure range and damage to the fuel consumption measurement system can be reliably avoided.
  • These consumption measurements can both at maximum delivery pressures of the delivery pump and at least when using the variant shown in FIG. 3, at low delivery pressures, which can be regulated down to -0.8 bar, for example, at the fuel supply.
  • the fuel pressure setpoint is thus set in a very short time by the electronic control loop, taking into account the actual value of the pressure determined by means of the pressure sensor, so that a high control accuracy and speed is achieved.
  • the simplicity of the control devices used and the small number of links to be controlled reduce the necessary equipment and thus also the financial outlay in comparison to known actively regulating pressure control devices. Furthermore, the space requirement is reduced in comparison to known designs.
  • Pressure control device can be used.
  • the section of the fuel return line upstream of the mouth of the bypass line for gasoline applications can be omitted, since there is no increased fuel delivery with return from the distributor bar.
  • the smaller check valve can also be designed as a 0-bar valve, with the spring being omitted in this variant.

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)
  • General Physics & Mathematics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif de régulation de pression pour des systèmes de mesure de consommation de carburant. Le dispositif comporte une conduite d'alimentation en carburant (14) pouvant être reliée à un consommateur (16) et par laquelle du carburant peut être acheminé au consommateur (16), une conduite de retour de carburant (26) par laquelle du carburant peut être réacheminé, une conduite de dérivation (34) par l'intermédiaire de laquelle la conduite d'alimentation en carburant (14) est reliée fluidiquement à la conduite de retour de carburant (26) et par laquelle du carburant peut être acheminé depuis la conduite d'alimentation en carburant (14), en contournant le consommateur (16), à la conduite de retour de carburant (26). Le dispositif comporte en outre un régulateur de pression (36) permettant d'ajuster une section transversale d'écoulement libre dans la conduite de dérivation (34), et un clapet anti-retour (38) disposé dans la conduite d'alimentation en carburant (14), en aval de la bifurcation (40) de la conduite de dérivation (34) et en amont d'un capteur de pression (42) relié électriquement à une unité de commande (44) permettant de régler le régulateur de pression (36) en fonction des valeurs de mesure du capteur de pression (42). Le clapet anti-retour (38) comporte deux ouvertures de passage (54, 68) dont la première (54) peut être traversée dans la direction d'ouverture du clapet anti-retour (38), de l'entrée (52) à la sortie (50) du clapet anti-retour (38), au moyen d'un premier corps de fermeture (56) à partir d'une première différence de pression définie, et la seconde ouverture de passage (68) peut être traversée dans la direction de fermeture du clapet anti-retour (38), d'une sortie (50) du clapet anti-retour (38) à une entrée (52) du clapet anti-retour (38), au moins à partir d'une seconde différence de pression définie.
PCT/AT2020/060017 2019-01-22 2020-01-22 Dispositif de régulation de pression pour système de mesure de consommation de carburant WO2020150760A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50047/2019A AT522135B1 (de) 2019-01-22 2019-01-22 Druckregeleinrichtung für ein Kraftstoffverbrauchsmesssystem
ATA50047/2019 2019-01-22

Publications (1)

Publication Number Publication Date
WO2020150760A1 true WO2020150760A1 (fr) 2020-07-30

Family

ID=69500494

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2020/060017 WO2020150760A1 (fr) 2019-01-22 2020-01-22 Dispositif de régulation de pression pour système de mesure de consommation de carburant

Country Status (2)

Country Link
AT (1) AT522135B1 (fr)
WO (1) WO2020150760A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1798080B1 (de) 1968-08-19 1973-10-18 Pierburg Luftfahrtgeraete Elektronisch gesteuertes durchflussmess- und dosiergeraet
EP0686763A1 (fr) * 1994-06-06 1995-12-13 Ganser-Hydromag Injecteur de combustible pour moteurs à combustion interne
DE102014214886A1 (de) * 2014-07-29 2016-02-04 Volkswagen Aktiengesellschaft Doppeltwirkendes Rückschlagventil
DE102017201580A1 (de) * 2017-02-01 2018-08-02 Robert Bosch Gmbh Rückschlag-Drossel-Ventil für einen Hochdruckspeicher
WO2019006485A1 (fr) * 2017-07-05 2019-01-10 Avl List Gmbh Dispositif de régulation de pression pour système de mesure de consommation de carburant et système de mesure de consommation de carburant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257200A (ja) * 2008-04-17 2009-11-05 Bosch Corp 燃料供給装置
DE102011089626A1 (de) * 2011-12-22 2013-06-27 Robert Bosch Gmbh Druckbegrenzungsventil für eine Kraftstofffördereinrichtung sowie Kraftstofffördereinrichtung
AT513154B1 (de) * 2012-09-17 2014-02-15 Bosch Gmbh Robert Niederdruckkreislauf für ein Kraftstoffeinspritzsystem
DE102016226077A1 (de) * 2016-12-22 2018-06-28 Robert Bosch Gmbh Überströmventil, insbesondere zur Verwendung in einem Kraftstoffeinspritzsystem, Hochdruckpumpe sowie Kraftstoffeinspritzsystem

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1798080B1 (de) 1968-08-19 1973-10-18 Pierburg Luftfahrtgeraete Elektronisch gesteuertes durchflussmess- und dosiergeraet
EP0686763A1 (fr) * 1994-06-06 1995-12-13 Ganser-Hydromag Injecteur de combustible pour moteurs à combustion interne
DE102014214886A1 (de) * 2014-07-29 2016-02-04 Volkswagen Aktiengesellschaft Doppeltwirkendes Rückschlagventil
DE102017201580A1 (de) * 2017-02-01 2018-08-02 Robert Bosch Gmbh Rückschlag-Drossel-Ventil für einen Hochdruckspeicher
WO2019006485A1 (fr) * 2017-07-05 2019-01-10 Avl List Gmbh Dispositif de régulation de pression pour système de mesure de consommation de carburant et système de mesure de consommation de carburant

Also Published As

Publication number Publication date
AT522135B1 (de) 2020-10-15
AT522135A1 (de) 2020-08-15

Similar Documents

Publication Publication Date Title
DE60028656T2 (de) Entspannungsventil
AT519880B1 (de) Druckregeleinrichtung für ein Kraftstoffverbrauchsmesssystem und Kraftstoffverbrauchsmesssystem
EP1464932B1 (fr) Régulateur de pression et dispositif pour la mesure continue de la consommation dynamique de liquid
AT3350U2 (de) Vorrichtung zur kontinuierlichen messung des dynamischen kraftstoffverbrauchs eines verbrauchers
EP3997424B1 (fr) Système de mesure pour mesurer un écoulement
DE1959525B2 (de) Steuervorrichtung fuer brenner regelanordnung
AT522135B1 (de) Druckregeleinrichtung für ein Kraftstoffverbrauchsmesssystem
DE102011012321B4 (de) System zur Zumessung von Fluid
DE2300194B2 (de) Brennstoffzuführeinrichtung für eine Brennkraftmaschine
DE19518634A1 (de) Verfahren und Gerät zur Kraftstoffzumessung und -verteilung
DE2754430A1 (de) Steuereinrichtung fuer mindestens zwei verstellbare pumpen
DE3407747A1 (de) Druckregler fuer eine verstellbare pumpe
AT523657B1 (de) Kraftstoffverbrauchsmesssystem
DE4414431C2 (de) Einrichtung zur Zumessung eines gasförmigen Brennstoffs in die Ansaugleitung einer Brennkraftmaschine
DE3026826C2 (de) Kraftstoffeinspritzvorrichtung für eine fremdgezündete Kolbenbrennkraftmaschine
DE10062681C2 (de) Flüssigkeitsventil für Heiz- und/oder Kühlanlagen
DE2515405A1 (de) Automatischer druckregler
AT215219B (de) Regelung der Brennstoff- und Verbrennungsluftzuführung bei Heißgaskolbenmaschinen und Vorrichtung hiezu
DE19804677A1 (de) Verfahren zum Betreiben einer Brennkraftmaschine
DE2753905A1 (de) Dosierverfahren und -vorrichtung
DE1275332B (de) Brennstoffregeleinrichtung fuer Gasturbinentriebwerke
DE1193727B (de) Vorrichtung zum Regeln der Kraftstoffzufuhr einer eine Pumpe einer hydraulischen Anlage antreibenden Brennkraftmaschine
DE1144539B (de) Brennstoffregelanlage fuer ein aus Kompressor und Gasturbine bestehendes Maschinenaggregat
CH362820A (de) Steuereinrichtung an Klimaanlage
DE1113120B (de) Brennstoffregelanlage fuer Brennkraftmaschinen, insbesondere Gasturbinentriebwerke

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20703926

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20703926

Country of ref document: EP

Kind code of ref document: A1