EP3158183A1 - Electromagnetically actuable proportional flow valve, and method for operating an electromagnetically actuable proportional flow valve - Google Patents

Electromagnetically actuable proportional flow valve, and method for operating an electromagnetically actuable proportional flow valve

Info

Publication number
EP3158183A1
EP3158183A1 EP15729834.0A EP15729834A EP3158183A1 EP 3158183 A1 EP3158183 A1 EP 3158183A1 EP 15729834 A EP15729834 A EP 15729834A EP 3158183 A1 EP3158183 A1 EP 3158183A1
Authority
EP
European Patent Office
Prior art keywords
filter element
heating device
sieve
electrical
injection system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15729834.0A
Other languages
German (de)
French (fr)
Inventor
Martin Beck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3158183A1 publication Critical patent/EP3158183A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • 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
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
    • F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/0209—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor the valve having a particular passage, e.g. provided with a filter, throttle or safety device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K49/00—Means in or on valves for heating or cooling
    • F16K49/002—Electric heating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0606—Fuel temperature
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/27—Fuel-injection apparatus with filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the invention relates to an electromagnetically actuated IVlengenproportionalventil for flow control in a fuel injection system, in particular in a common rail injection system, with the features of the preamble of claim 1.
  • a proportional valve proportional can be used in particular as a metering unit, which low pressure side of a high-pressure fuel pump of a fuel injection system operating point-dependent with the required amount of fuel supplied.
  • the invention relates to a method for operating an electromagnetically actuated quantity proportional valve for volume control in a fuel injection system, in particular in a common rail injection system.
  • Quantity proportional valves of the type mentioned above are very sensitive to dirt and are therefore often equipped with a filter element or sieve, to prevent contaminants contained in the fuel from entering the valve.
  • a proportional mass valve as a metering unit for a high-pressure pump of a fuel injection system which comprises a solenoid valve with a magnetic core, which also forms a valve housing and is provided with at least one radially extending supply bore.
  • the magnetic core is surrounded on the outer circumferential side by a filter element, so that the fuel contained in the fuel
  • adjuster and known as a two-part applications of a metering unit
  • the latter additionally comprise a pressure control valve, via which an already heated Abêtmenge back to the inlet region of the high-pressure pump can be fed.
  • the Abêtmenge can then be used to heat the fuel in the inlet area.
  • this alone is often insufficient to reliably prevent clogging of the filter element of the metering unit.
  • the present invention has for its object to provide a equipped with a filter element or sieve, electromagnetically actuated quantity proportional valve for a fuel injection system, which allows a reliable flow control even at cold temperatures and / or cold start.
  • the electromagnetically actuated quantity proportional valve proposed for quantity regulation in a fuel injection system comprises a valve housing with at least one inlet bore, in front of which a filter element or sieve is arranged.
  • an electrical heating device is provided for heating the filter element or sieve. Via the electric heating device, the fuel in the inlet area of the quantity pro- proportional valves are heated to a temperature so that no paraffin crystals in the fuel, in particular diesel fuel, are formed.
  • the risk of clogging of the upstream filter element or sieve decreases significantly, so that furthermore a reliable quantity control is ensured at cold temperatures and / or during cold start.
  • the electric heater for heating the filter element or screen is designed as a resistance heater and comprises at least one heating wire.
  • a heater is easy to implement and requires a small amount of space.
  • the at least one heating wire is integrated in the filter element or sieve. As a result, the space requirement can be further reduced.
  • the at least one heating wire may be part of the filter or mesh fabric.
  • the electrical heating device is connected via an electrical line to at least one electrical line for power supply and / or control of an electromagnet accommodated in the valve housing.
  • the electric heater can be powered or energized in this way via the electromagnet. That is, no separate connection of the electric heater to an external power supply is required.
  • the control of the electric heater is preferably carried out in parallel to the control of the electromagnet. If it is a volume proportional valve that is closed when de-energized solenoid, a flow-dependent power control of the electric heater can be realized in this way.
  • the electrical heating device can be connected via an electrical line to an external power supply.
  • the external power supply can take place for example via a control unit, to which preferably also the solenoid of the proportional quantity valve is connected.
  • a control unit to which preferably also the solenoid of the proportional quantity valve is connected.
  • a software is preferably stored, which allows integration of the electric heater in a higher-level electrical energy management.
  • a temperature switch is provided, via which the electric heating device can be switched on and off.
  • a temperature switch proves to be particularly useful when the control of the electric heater is parallel to the solenoid of the proportional quantity valve. It ensures that the electrical heating of the filter element or screen occurs only when the temperature of the fuel falls below a certain limit.
  • the limit may be -5 ° C.
  • An upper limit for switching off the heating device may be, for example, 5 ° C (switching hysteresis).
  • a temperature switch is particularly suitable a bimetallic switch that is easy to integrate.
  • the temperature switch is accommodated in the valve housing of the proportional quantity valve.
  • the valve housing has a plug connection for connecting at least one electrical line to an external power supply. If necessary, the plug connection must be equipped with a further contact for a further electrical line or wire, if the activation of the electric heating device does not take place parallel to the electromagnet of the proportional quantity valve.
  • the plug connection allows a bundling of the electrical lines, so that essentially already existing connection components can be used.
  • the valve comprises a valve housing with at least one inlet bore, in front of which a filter element or Sieve is arranged.
  • the filter element or sieve is heated, at least temporarily, by means of an electrical heating device designed as a resistance heater and comprising at least one heating wire.
  • the electrical heating of the filter element or of the screen takes place, in particular, at cold temperatures and / or during cold start in order to heat the fuel, in particular the diesel fuel, and to prevent the formation of paraffin crystals, which could clog the filter element or sieve. In this way is a reliable flow control ensured by the proportional valve even at cold temperatures and / or cold start.
  • the formation of the electric heater as resistance heating with at least one heating wire is easy to implement.
  • the at least one heating wire can be integrated in particular in the filter or screen fabric.
  • the electrical heating device is preferably supplied with power via an electrical line, which is connected to at least one electrical line for the power supply and / or control of an electromagnet accommodated in the valve housing.
  • the control is carried out in this case preferably parallel to the control of the electromagnet. In this way, a flow-dependent control of the electric heater is possible, for example, it is a quantity proportional valve that is normally closed.
  • the electrical heating device be supplied with power via an electrical line that can be connected to an external power supply.
  • the control of the electric heater can be done in this case, regardless of the control of the electromagnet.
  • the electric heater via a temperature switch on demand and is switched off.
  • the connection of the electric heater should be made in particular when the temperature of the fuel falls below a certain limit.
  • the limit may be -5 ° C. If the temperature falls below -5 ° C, the electric heater is switched on.
  • An upper limit for switching off the heating device may be, for example, 5 ° C (switching hysteresis).
  • a temperature switch for example, a bimetallic switch can be used.
  • FIG. 1 shows a schematic longitudinal section through a first inventive electromagnetically actuated quantity proportional valve with a circuit diagram
  • Fig. 2 is a schematic longitudinal section through a second inventive electromagnetically actuated quantity proportional valve with a modified circuit diagram
  • Fig. 3 is a perspective view of the quantity proportional valve of Fig. 1. Detailed Description of the Drawings
  • the quantity-proportional valve shown in FIG. 1 comprises a valve housing 1, in which at least one inlet bore 2 is formed.
  • the inlet bore 2 is in the present case designed as a radial bore and the outer circumference surrounded by a filter element or sieve 3.
  • At least one heating wire 4, which is part of an electrical heating device for heating the filter element or sieve 3, is integrated in the filter or sieve fabric of the filter element or sieve 3.
  • the heating wire 4 is connected in each case via an electrical line 5 to electrical lines 6 and 7, via which an electromagnet 8 of the valve can be controlled.
  • the control of the electric heater of the filter element or sieve 3 is therefore carried out in parallel to the control of the electromagnet 8.
  • a temperature switch 9 is arranged in the electrical line 5. This only makes contact when the temperature of the fuel falls below a certain limit.
  • the embodiment according to FIG. 1 has the advantage that the power supply of the electric heating device can take place via already existing connection components.
  • these comprise a plug connection 10 (see FIG. 3) which is formed on the outside of the valve housing 1 and serves to connect the valve to an external power supply or to a control device (not shown).
  • Changes to the plug connection 10 are at a control of the electric heater not required parallel to the control of the electromagnet 8.
  • no changes must be made to external components such as a wiring harness in which all electrical lines for powering the fuel injection system are bundled. Under certain circumstances, only in the control unit, the power amplifier must be adapted to increased performance.
  • FIG. 2 An alternative control of the electric heating device of a quantity proportional valve according to the invention is shown in FIG. 2.
  • the control takes place via a separate electrical line 5 ', which leads separately into the plug connection 10 and thus enables independent control of the electric heating device from the electromagnet 8.
  • a temperature switch 9 can thus be omitted.
  • the valve of FIG. 2 does not differ from that of FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to an electromagnetically actuable proportional flow valve for flow regulation in a fuel injection system, in particular in a common-rail injection system, comprising a valve housing (1) with at least one feed bore (2), upstream of which there is arranged a filter element or screen (3). According to the invention, an electric heating device is provided for heating the filter element or screen (3). The invention also relates to a method for operating an electromagnetically actuable proportional flow valve for flow regulation in a fuel injection system, in particular in a common-rail injection system.

Description

Beschreibung Titel  Description title
Elektromagnetisch betätigbares IVlengenproportionalventil sowie Verfahren zum Betreiben eines elektromagnetisch betätigbaren Mengenproportionalventils  Electromagnetically actuated IVlengenproportionalventil and method for operating an electromagnetically actuated quantity proportional valve
Die Erfindung betrifft ein elektromagnetisch betätigbares IVlengenproportionalventil zur Mengenregelung in einem Kraftstoffe inspritzsystem, insbesondere in einem Common- Rail- Einspritzsystem, mit den Merkmalen des Oberbegriffs des Anspruchs 1. Ein solches Mengenproportionalventil ist insbesondere als Zumesseinheit einsetzbar, welche niederdruckseitig eine Kraftstoffhochdruckpumpe eines Kraftstoffeinspritzsystems betriebspunktabhängig mit der erforderlichen Menge Kraftstoff versorgt. Ferner betrifft die Erfindung ein Verfahren zum Betreiben eines elektromagnetisch betätigbaren Mengenproportionalventils zur Mengenregelung in einem Kraftstoffeinspritzsystem, insbesondere in einem Common- Rail- Einspritzsystem. The invention relates to an electromagnetically actuated IVlengenproportionalventil for flow control in a fuel injection system, in particular in a common rail injection system, with the features of the preamble of claim 1. Such a proportional valve proportional can be used in particular as a metering unit, which low pressure side of a high-pressure fuel pump of a fuel injection system operating point-dependent with the required amount of fuel supplied. Furthermore, the invention relates to a method for operating an electromagnetically actuated quantity proportional valve for volume control in a fuel injection system, in particular in a common rail injection system.
Stand der Technik State of the art
Mengeproportionalventile der vorstehend genannten Art sind sehr schmutzempfindlich und werden daher oftmals mit einem Filterelement oder Sieb ausgestattet, um zu verhindern, dass im Kraftstoff enthaltene Schmutzpartikel in das Ventil gelangen. Quantity proportional valves of the type mentioned above are very sensitive to dirt and are therefore often equipped with a filter element or sieve, to prevent contaminants contained in the fuel from entering the valve.
Aus der Offenlegungsschrift DE 10 2010 062 455 AI ist beispielsweise ein Mengenproportionalventil als Zumesseinheit für eine Hochdruckpumpe eines Kraftstoffeinspritzsystems bekannt, welche ein Magnetventil mit einem Magnetkern umfasst, der zugleich ein Ventilgehäuse ausbildet und mit zumindest einer radial verlaufenden Zu- laufbohrung versehen ist. Im Bereich der Zulaufbohrung ist der Magnetkern außenum- fangseitig von einem Filterelement umgeben, so dass im Kraftstoff enthaltene From the published patent application DE 10 2010 062 455 AI, for example, a proportional mass valve as a metering unit for a high-pressure pump of a fuel injection system is known which comprises a solenoid valve with a magnetic core, which also forms a valve housing and is provided with at least one radially extending supply bore. In the area of the inlet bore, the magnetic core is surrounded on the outer circumferential side by a filter element, so that the fuel contained in the fuel
Schmutzpartikel abgeschieden werden. Um einen effektiven Schutz der Zumesseinheit zu erzielen, ist die Maschenweite eines solchen Filterelements in der Regel möglichst klein ausgelegt. Dies kann jedoch bei kalten Temperaturen und/oder beim Kaltstart zu Problemen führen, da sich im Kraftstoff, insbesondere im Dieselkraftstoff, Paraffinkristalle ausbilden, die das Filterelement zusetzen können. Die Folge ist eine Unterversorgung der Hochdruckpumpe mit Kraftstoff. Dirt particles are deposited. In order to achieve effective protection of the metering unit, the mesh size of such a filter element is usually designed as small as possible. However, this can lead to problems at cold temperatures and / or during cold start, since form in the fuel, especially in diesel fuel, paraffin crystals, which can enforce the filter element. The result is a shortage of the high-pressure pump with fuel.
Aus dem Stand der Technik sind ferner als Einsteller und als Zweisteller bekannte Applikationen einer Zumesseinheit bekannt, wobei Letztere zusätzlich ein Druckregelventil umfassen, über welches eine bereits erwärmte Absteuermenge wieder dem Zulaufbereich der Hochdruckpumpe zuführbar ist. Die Absteuermenge kann dann zur Erwärmung des Kraftstoffs im Zulaufbereich genutzt werden. Oftmals reicht dies alleine jedoch nicht aus, um ein Zusetzen des Filterelements der Zumesseinheit sicher zu verhindern. From the prior art are also known as adjuster and known as a two-part applications of a metering unit, the latter additionally comprise a pressure control valve, via which an already heated Absteuermenge back to the inlet region of the high-pressure pump can be fed. The Absteuermenge can then be used to heat the fuel in the inlet area. However, this alone is often insufficient to reliably prevent clogging of the filter element of the metering unit.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein mit einem Filterelement oder Sieb ausgestattetes, elektromagnetisch betätigbares Mengenproportionalventil für ein Kraftstoffeinspritzsystem anzugeben, das auch bei kalten Temperaturen und/oder beim Kaltstart eine zuverlässige Mengenregelung ermöglicht. The present invention has for its object to provide a equipped with a filter element or sieve, electromagnetically actuated quantity proportional valve for a fuel injection system, which allows a reliable flow control even at cold temperatures and / or cold start.
Zur Lösung der Aufgabe werden ein elektromagnetisch betätigbares Mengenproportionalventil mit den Merkmalen des Anspruchs 1 sowie ein Verfahren zum Betreiben eines elektromagnetisch betätigbaren Mengenproportionalventils mit den Merkmalen des Anspruchs 7 vorgeschlagen. Vorteilhafte Weiterbildungen der Erfindung sind den jeweili- gen Unteransprüchen zu entnehmen. To solve the problem, an electromagnetically actuated quantity proportional valve with the features of claim 1 and a method for operating an electromagnetically actuated proportional quantity valve with the features of claim 7 are proposed. Advantageous developments of the invention can be found in the respective dependent claims.
Offenbarung der Erfindung Disclosure of the invention
Das zur Mengenregelung in einem Kraftstoffeinspritzsystem, insbesondere in einem Common-Rail-Einspritzsystem, vorgeschlagene elektromagnetisch betätigbare Mengenproportionalventil umfasst ein Ventilgehäuse mit mindestens einer Zulaufbohrung, vor welcher ein Filterelement oder Sieb angeordnet ist. Erfindungsgemäß ist eine elektrische Heizvorrichtung zur Beheizung des Filterelements oder Siebs vorgesehen. Über die elektrische Heizvorrichtung kann der Kraftstoff im Zulaufbereich des Mengenpro- portionalventils auf eine Temperatur erwärmt werden, so dass keine Paraffinkristalle im Kraftstoff, insbesondere Dieselkraftstoff, ausgebildet werden. Damit sinkt die Gefahr eines Zusetzens des vorgeschalteten Filterelements bzw. Siebs deutlich, so dass ferner eine zuverlässige Mengenreglung bei kalten Temperaturen und/oder beim Kaltstart sichergestellt ist. The electromagnetically actuated quantity proportional valve proposed for quantity regulation in a fuel injection system, in particular in a common rail injection system, comprises a valve housing with at least one inlet bore, in front of which a filter element or sieve is arranged. According to the invention, an electrical heating device is provided for heating the filter element or sieve. Via the electric heating device, the fuel in the inlet area of the quantity pro- proportional valves are heated to a temperature so that no paraffin crystals in the fuel, in particular diesel fuel, are formed. Thus, the risk of clogging of the upstream filter element or sieve decreases significantly, so that furthermore a reliable quantity control is ensured at cold temperatures and / or during cold start.
Bevorzugt ist die elektrische Heizvorrichtung zur Beheizung des Filterelements oder Siebs als Widerstandsheizung ausgelegt und umfasst mindestens einen Heizdraht. Eine solche Heizvorrichtung ist einfach umsetzbar und benötigt einen geringen Bauraum. Vorzugsweise ist der mindestens eine Heizdraht in das Filterelement oder Sieb integriert. Dadurch kann der Bauraumbedarf weiter gesenkt werden. Beispielsweise kann der mindestens eine Heizdraht Bestandteil des Filter- oder Siebgewebes sein. Preferably, the electric heater for heating the filter element or screen is designed as a resistance heater and comprises at least one heating wire. Such a heater is easy to implement and requires a small amount of space. Preferably, the at least one heating wire is integrated in the filter element or sieve. As a result, the space requirement can be further reduced. For example, the at least one heating wire may be part of the filter or mesh fabric.
Weiterhin bevorzugt ist die elektrische Heizvorrichtung über eine elektrische Leitung an mindestens eine elektrische Leitung zur Stromversorgung und/oder Ansteuerung eines im Ventilgehäuse aufgenommenen Elektromagneten angeschlossen. Die elektrische Heizvorrichtung kann auf diese Weise über den Elektromagneten mit Strom versorgt bzw. angesteuert werden. Das heißt, dass kein separater Anschluss der elektrischen Heizvorrichtung an eine externe Stromversorgung erforderlich ist. Die Ansteuerung der elektrischen Heizvorrichtung erfolgt dabei vorzugsweise parallel zur Ansteuerung des Elektromagneten. Handelt es sich um ein Mengenproportionalventil, das bei stromlos geschaltetem Elektromagneten geschlossen ist, kann auf diese Weise eine durchflussabhängige Leistungssteuerung der elektrischen Heizvorrichtung realisiert werden. Further preferably, the electrical heating device is connected via an electrical line to at least one electrical line for power supply and / or control of an electromagnet accommodated in the valve housing. The electric heater can be powered or energized in this way via the electromagnet. That is, no separate connection of the electric heater to an external power supply is required. The control of the electric heater is preferably carried out in parallel to the control of the electromagnet. If it is a volume proportional valve that is closed when de-energized solenoid, a flow-dependent power control of the electric heater can be realized in this way.
Um die elektrische Heizvorrichtung unabhängig vom Elektromagneten anzusteuern, wird alternativ oder ergänzend vorgeschlagen, dass die elektrische Heizvorrichtung über eine elektrische Leitung an eine externe Stromversorgung anschließbar ist. Die externe Stromversorgung kann beispielsweise über ein Steuergerät erfolgen, an welches vorzugsweise auch der Elektromagnet des Mengenproportionalventils angeschlossen ist. Auf diese Weise können bereits vorhandene Anschlusskomponenten genutzt werden, die ggf. nur mit einer weiteren elektrischen Leitung bzw. Ader zur Ansteuerung der elektrischen Heizvorrichtung auszurüsten sind. Im Steuergerät ist vorzugsweise eine Software hinterlegt, welche eine Integration der elektrischen Heizvorrichtung in ein übergeordnetes elektrisches Energiemanagement ermöglicht. ln Weiterbildung der Erfindung wird vorgeschlagen, dass ein Temperaturschalter vorgesehen ist, über den die elektrische Heizvorrichtung zu- und abschaltbar ist. Ein Temperaturschalter erweist sich insbesondere als sinnvoll, wenn die Ansteuerung der elektrischen Heizvorrichtung parallel zum Elektromagneten des Mengenproportionalventils erfolgt. Er stellt sicher, dass die elektrische Beheizung des Filterelements oder Siebs nur dann erfolgt, wenn die Temperatur des Kraftstoffs einen bestimmten Grenzwert unterschreitet. Der Grenzwert kann beispielsweise bei -5°C liegen. Ein oberer Grenzwert zum Abschalten der Heizvorrichtung kann beispielsweise bei 5°C liegen (Schalthysterese). Als Temperaturschalter eignet sich insbesondere ein Bimetall-Schalter, der einfach zu integrieren ist. Vorzugsweise ist der Temperaturschalter im Ventilgehäuse des Mengenproportionalventils aufgenommen. In order to control the electric heating device independently of the electromagnet, it is alternatively or additionally proposed that the electrical heating device can be connected via an electrical line to an external power supply. The external power supply can take place for example via a control unit, to which preferably also the solenoid of the proportional quantity valve is connected. In this way, already existing connection components can be used, which may need to be equipped with only one further electrical line or wire for controlling the electric heater. In the control unit, a software is preferably stored, which allows integration of the electric heater in a higher-level electrical energy management. In a further development of the invention, it is proposed that a temperature switch is provided, via which the electric heating device can be switched on and off. A temperature switch proves to be particularly useful when the control of the electric heater is parallel to the solenoid of the proportional quantity valve. It ensures that the electrical heating of the filter element or screen occurs only when the temperature of the fuel falls below a certain limit. For example, the limit may be -5 ° C. An upper limit for switching off the heating device may be, for example, 5 ° C (switching hysteresis). As a temperature switch is particularly suitable a bimetallic switch that is easy to integrate. Preferably, the temperature switch is accommodated in the valve housing of the proportional quantity valve.
Vorteilhafterweise besitzt das Ventilgehäuse einen Steckeranschluss zur Verbindung wenigstens einer elektrischen Leitung mit einer externen Stromversorgung. Der Steckeranschluss muss ggf. mit einem weiteren Kontakt für eine weitere elektrische Leitung bzw. Ader ausgestattet werden, wenn die Ansteuerung der elektrischen Heizvorrichtung nicht parallel zum Elektromagneten des Mengenproportionalventils erfolgt. Der Steckeranschluss ermöglicht eine Bündelung der elektrischen Leitungen, so dass im Wesentlichen bereits vorhandene Anschlusskomponenten genutzt werden können. Advantageously, the valve housing has a plug connection for connecting at least one electrical line to an external power supply. If necessary, the plug connection must be equipped with a further contact for a further electrical line or wire, if the activation of the electric heating device does not take place parallel to the electromagnet of the proportional quantity valve. The plug connection allows a bundling of the electrical lines, so that essentially already existing connection components can be used.
Das ferner zur Lösung der eingangs genannten Aufgabe vorgeschlagene Verfahren zum Betreiben eines elektromagnetisch betätigbaren Mengenproportionalventils zur Mengenregelung in einem Kraftstoffeinspritzsystem, insbesondere in einem Common- Rail- Einspritzsystem, setzt voraus, dass das Ventil ein Ventilgehäuse mit mindestens einer Zulaufbohrung umfasst, vor welcher ein Filterelement oder Sieb angeordnet ist. Erfindungsgemäß wird bei dem Verfahren das Filterelement oder Sieb zumindest zeitweise mittels einer als Widerstandsheizung ausgelegten und mindestens einen Heizdraht umfassenden elektrischen Heizvorrichtung beheizt. Die elektrische Beheizung des Filterelements oder des Siebs erfolgt insbesondere bei kalten Temperaturen und/oder beim Kaltstart, um den Kraftstoff, insbesondere den Dieselkraftstoff, zu erwärmen und die Ausbildung von Paraffinkristallen zu verhindern, die das Filterelement oder Sieb zusetzen könnten. Auf diese Weise ist eine zuverlässige Mengenregelung durch das Mengenproportionalventil selbst bei kalten Temperaturen und/oder beim Kaltstart gewährleistet. The further proposed for the solution of the above-mentioned object method for operating an electromagnetically actuated proportional quantity valve for flow control in a fuel injection system, in particular in a common rail injection system, requires that the valve comprises a valve housing with at least one inlet bore, in front of which a filter element or Sieve is arranged. According to the invention, the filter element or sieve is heated, at least temporarily, by means of an electrical heating device designed as a resistance heater and comprising at least one heating wire. The electrical heating of the filter element or of the screen takes place, in particular, at cold temperatures and / or during cold start in order to heat the fuel, in particular the diesel fuel, and to prevent the formation of paraffin crystals, which could clog the filter element or sieve. In this way is a reliable flow control ensured by the proportional valve even at cold temperatures and / or cold start.
Die Ausbildung der elektrischen Heizvorrichtung als Widerstandsheizung mit wenigstens einem Heizdraht ist einfach zu realisieren. Der wenigstens eine Heizdraht kann insbesondere in das Filter- bzw. Siebgewebe integriert werden. The formation of the electric heater as resistance heating with at least one heating wire is easy to implement. The at least one heating wire can be integrated in particular in the filter or screen fabric.
Bevorzugt wird die elektrische Heizvorrichtung über eine elektrische Leitung, die an mindestens eine elektrische Leitung zur Stromversorgung und/oder Ansteuerung eines im Ventilgehäuse aufgenommenen Elektromagneten angeschlossen ist, mit Strom versorgt. Die Ansteuerung erfolgt in diesem Fall bevorzugt parallel zur Ansteuerung des Elektromagneten. Auf diese Weise ist eine durchflussabhängige Ansteuerung der elektrischen Heizvorrichtung möglich ist, wenn es sich beispielsweise um ein Mengenproportionalventil handelt, dass stromlos geschlossen ist. The electrical heating device is preferably supplied with power via an electrical line, which is connected to at least one electrical line for the power supply and / or control of an electromagnet accommodated in the valve housing. The control is carried out in this case preferably parallel to the control of the electromagnet. In this way, a flow-dependent control of the electric heater is possible, for example, it is a quantity proportional valve that is normally closed.
Alternativ oder ergänzend wird vorgeschlagen, dass die elektrische Heizvorrichtung über eine elektrische Leitung, die an eine externe Stromversorgung anschließbar ist, mit Strom versorgt wird. Die Ansteuerung der elektrischen Heizvorrichtung kann in diesem Fall unabhängig von der Ansteuerung des Elektromagneten erfolgen. Alternatively or additionally, it is proposed that the electrical heating device be supplied with power via an electrical line that can be connected to an external power supply. The control of the electric heater can be done in this case, regardless of the control of the electromagnet.
Darüber hinaus wird vorgeschlagen, dass die elektrische Heizvorrichtung über einen Temperaturschalter bei Bedarf zu- und abgeschaltet wird. Das Zuschalten der elektrischen Heizvorrichtung sollte insbesondere dann erfolgen, wenn die Temperatur des Kraftstoffs unter einen bestimmten Grenzwert fällt. Der Grenzwert kann beispielsweise bei -5°C liegen. Wird eine Temperatur von -5°C unterschritten, wird die elektrische Heizvorrichtung zugeschaltet. Ein oberer Grenzwert zum Abschalten der Heizvorrichtung kann beispielsweise bei 5°C liegen (Schalthysterese). Als Temperaturschalter kann beispielsweise ein Bimetall-Schalter eingesetzt werden. In addition, it is proposed that the electric heater via a temperature switch on demand and is switched off. The connection of the electric heater should be made in particular when the temperature of the fuel falls below a certain limit. For example, the limit may be -5 ° C. If the temperature falls below -5 ° C, the electric heater is switched on. An upper limit for switching off the heating device may be, for example, 5 ° C (switching hysteresis). As a temperature switch, for example, a bimetallic switch can be used.
Erfolgt die Ansteuerung der elektrischen Heizvorrichtung über eine separate elektrische Leitung, kann auf einen Temperaturschalter verzichtet werden. Denn dann kann eine bedarfsgerechte Ansteuerung über ein externes Steuergerät, in dem eine entsprechende Software hinterlegt ist, realisiert werden. Bevorzugte Ausführungsformen der Erfindung werden nachfolgend anhand der beigefügten Zeichnungen näher erläutert. Diese zeigen: If the control of the electric heater via a separate electrical line, can be dispensed with a temperature switch. Because then an on-demand control via an external control device, in which a corresponding software is deposited, can be realized. Preferred embodiments of the invention are explained below with reference to the accompanying drawings. These show:
Fig. 1 einen schematischen Längsschnitt durch ein erstes erfindungsgemäßes elektromagnetisch betätigbares Mengenproportionalventil mit Schaltschema, 1 shows a schematic longitudinal section through a first inventive electromagnetically actuated quantity proportional valve with a circuit diagram,
Fig. 2 einen schematischen Längsschnitt durch ein zweites erfindungsgemäßes elektromagnetisch betätigbares Mengenproportionalventil mit modifiziertem Schaltschema und Fig. 2 is a schematic longitudinal section through a second inventive electromagnetically actuated quantity proportional valve with a modified circuit diagram and
Fig. 3 eine perspektivische Darstellung des Mengenproportionalventils der Fig. 1. Ausführliche Beschreibung der Zeichnungen Fig. 3 is a perspective view of the quantity proportional valve of Fig. 1. Detailed Description of the Drawings
Das in der Fig. 1 dargestellte Mengenproportionalventil umfasst ein Ventilgehäuse 1, in dem wenigstens eine Zulaufbohrung 2 ausgebildet ist. Die Zulaufbohrung 2 ist vorliegend als Radialbohrung ausgeführt und außenumfangseitig von einem Filterelement oder Sieb 3 umgeben. In das Filter- bzw. Siebgewebe des Filterelements oder Siebs 3 ist wenigstens ein Heizdraht 4 integriert, der Teil einer elektrischen Heizvorrichtung zur Beheizung des Filterelements oder Siebs 3 ist. Der Heizdraht 4 ist jeweils über eine elektrische Leitung 5 an elektrische Leitungen 6 und 7 angeschlossen, über welche ein Elektromagnet 8 des Ventils ansteuerbar ist. Die Ansteuerung der elektrischen Heizvorrichtung des Filterelements oder Siebs 3 erfolgt demnach parallel zur Ansteuerung des Elektromagneten 8. Um eine bedarfsgerechte Ansteuerung der elektrischen Heizvorrichtung zu ermöglichen, ist in der elektrischen Leitung 5 ein Temperaturschalter 9 angeordnet. Dieser stellt einen Kontakt nur dann her, wenn die Temperatur des Kraftstoffs unter einen bestimmten Grenzwert fällt. The quantity-proportional valve shown in FIG. 1 comprises a valve housing 1, in which at least one inlet bore 2 is formed. The inlet bore 2 is in the present case designed as a radial bore and the outer circumference surrounded by a filter element or sieve 3. At least one heating wire 4, which is part of an electrical heating device for heating the filter element or sieve 3, is integrated in the filter or sieve fabric of the filter element or sieve 3. The heating wire 4 is connected in each case via an electrical line 5 to electrical lines 6 and 7, via which an electromagnet 8 of the valve can be controlled. The control of the electric heater of the filter element or sieve 3 is therefore carried out in parallel to the control of the electromagnet 8. In order to enable a demand-driven control of the electric heater, a temperature switch 9 is arranged in the electrical line 5. This only makes contact when the temperature of the fuel falls below a certain limit.
Die Ausführungsform gemäß der Fig. 1 besitzt den Vorteil, dass die Stromversorgung der elektrischen Heizvorrichtung über bereits vorhandene Anschlusskomponenten erfolgen kann. Diese umfassen vorliegend einen Steckeranschluss 10 (siehe Fig. 3), der außen am Ventilgehäuse 1 ausgebildet ist und dem Anschluss des Ventils an eine externe Stromversorgung bzw. an ein Steuergerät (nicht dargestellt) dient. Änderungen am Steckeranschluss 10 sind bei einer Ansteuerung der elektrischen Heizvorrichtung parallel zur Ansteuerung des Elektromagneten 8 nicht erforderlich. Ebenfalls müssen keine Änderungen an externen Komponenten, beispielsweise an einem Kabelbaum, in dem sämtliche elektrische Leitungen zur Stromversorgung des Kraftstoffeinspritzsystems gebündelt werden, vorgenommen werden. Unter Umständen muss lediglich im Steuergerät die Endstufe einer erhöhten Leistung angepasst werden. The embodiment according to FIG. 1 has the advantage that the power supply of the electric heating device can take place via already existing connection components. In the present case, these comprise a plug connection 10 (see FIG. 3) which is formed on the outside of the valve housing 1 and serves to connect the valve to an external power supply or to a control device (not shown). Changes to the plug connection 10 are at a control of the electric heater not required parallel to the control of the electromagnet 8. Also, no changes must be made to external components such as a wiring harness in which all electrical lines for powering the fuel injection system are bundled. Under certain circumstances, only in the control unit, the power amplifier must be adapted to increased performance.
Eine alternative Ansteuerung der elektrischen Heizvorrichtung eines erfindungsgemäßen Mengenproportionalventils ist in der Fig. 2 dargestellt. Hier erfolgt die Ansteuerung über eine separate elektrische Leitung 5', die separat in den Steckeranschluss 10 ge- führt ist und somit eine vom Elektromagneten 8 unabhängige Ansteuerung der elektrischen Heizvorrichtung ermöglicht. Ein Temperaturschalter 9 kann somit entfallen. Im Steckeranschluss 10 ist lediglich ein weiterer Kontaktpin 11 für den Anschluss der elektrischen Leitung 5' vorzusehen. Im Übrigen unterscheidet sich das Ventil der Fig. 2 nicht von dem der Fig. 1. An alternative control of the electric heating device of a quantity proportional valve according to the invention is shown in FIG. 2. Here, the control takes place via a separate electrical line 5 ', which leads separately into the plug connection 10 and thus enables independent control of the electric heating device from the electromagnet 8. A temperature switch 9 can thus be omitted. In the connector terminal 10, only a further contact pin 11 is provided for the connection of the electrical line 5 '. Incidentally, the valve of FIG. 2 does not differ from that of FIG. 1.

Claims

Ansprüche claims
1. Elektromagnetisch betätigbares Mengenproportionalventil zur Mengenregelung in einem Kraftstoffeinspritzsystem, insbesondere in einem Common- Rail- Einspritzsystem, umfassend ein Ventilgehäuse (1) mit mindestens einer Zulaufbohrung (2), vor welcher ein Filterelement oder Sieb (3) angeordnet ist, 1. Electromagnetically actuated quantity proportional valve for quantity control in a fuel injection system, in particular in a common rail injection system, comprising a valve housing (1) with at least one inlet bore (2), in front of which a filter element or sieve (3) is arranged,
dadurch gekennzeichnet, dass eine elektrische Heizvorrichtung zur Beheizung des Filterelements oder Siebs (3) vorgesehen ist. characterized in that an electric heater for heating the filter element or sieve (3) is provided.
2. Mengenproportionalventil nach Anspruch 1, 2. Quantity proportional valve according to claim 1,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung zur Beheizung des Filterelements oder Siebs (3) als Widerstandsheizung ausgelegt ist und mindestens einen Heizdraht (4) umfasst, der vorzugsweise in das Filterelement oder Sieb (3) integriert ist. characterized in that the electrical heating device for heating the filter element or sieve (3) is designed as resistance heating and comprises at least one heating wire (4), which is preferably integrated in the filter element or sieve (3).
3. Mengenproportionalventil nach Anspruch 1 oder 2, 3. proportion proportional valve according to claim 1 or 2,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung über eine elektrische Leitung (5) an mindestens eine elektrische Leitung (6, 7) zur Stromversorgung und/oder Ansteuerung eines im Ventilgehäuse (1) aufgenommenen Elektromagneten (8) angeschlossen ist. characterized in that the electrical heating device via an electrical line (5) to at least one electrical line (6, 7) for power supply and / or control of a valve housing (1) recorded electromagnet (8) is connected.
4. Mengenproportionalventil nach einem der vorhergehenden Ansprüche, 4. proportioning proportional valve according to one of the preceding claims,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung über eine elektrische Leitung (5') an eine externe Stromversorgung anschließbar ist. characterized in that the electrical heating device via an electrical line (5 ') can be connected to an external power supply.
5. Mengenproportionalventil nach einem der vorhergehenden Ansprüche, 5. Quantity proportional valve according to one of the preceding claims,
dadurch gekennzeichnet, dass ein Temperaturschalter (9) vorgesehen ist, über den die elektrische Heizvorrichtung zu- und abschaltbar ist, wobei vorzugsweise der Tem- peraturschalter (9) ein Bimetall-Schalter ist und/oder im Ventilgehäuse (1) aufgenommen ist. characterized in that a temperature switch (9) is provided, via which the electric heating device can be switched on and off, wherein preferably the temperature switch (9) is a bimetallic switch and / or is accommodated in the valve housing (1).
6. Mengenproportionalventil nach einem der vorhergehenden Ansprüche, 6. proportional proportional valve according to one of the preceding claims,
dadurch gekennzeichnet, dass das Ventilgehäuse (1) einen Steckeranschluss (10) zur Verbindung wenigstens einer elektrischen Leitung (5', 6, 7) mit einer externen Stromversorgung besitzt. characterized in that the valve housing (1) has a plug connection (10) for connecting at least one electrical line (5 ', 6, 7) to an external power supply.
7. Verfahren zum Betreiben eines elektromagnetisch betätigbaren Mengenproporti- onalventils zur Mengenregelung in einem Kraftstoffeinspritzsystem, insbesondere in einem Common- Rail-Einspritzsystem, wobei das Ventil ein Ventilgehäuse (1) mit mindestens einer Zulaufbohrung (2) umfasst, vor welcher ein Filterelement oder Sieb (3) angeordnet ist, 7. A method for operating an electromagnetically actuatable Mengenproporti- onalventils for volume control in a fuel injection system, in particular in a common rail injection system, wherein the valve comprises a valve housing (1) with at least one inlet bore (2), in front of which a filter element or sieve ( 3) is arranged,
dadurch gekennzeichnet, dass das Filterelement oder Sieb (3) zumindest zeitweise mittels einer als Widerstandsheizung ausgelegten und mindestens einen Heizdraht (4) umfassenden elektrischen Heizvorrichtung beheizt wird. characterized in that the filter element or sieve (3) is at least temporarily heated by means of a designed as a resistance heating and at least one heating wire (4) comprehensive electric heating device.
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung über eine elektrische Leitung (5), die an mindestens eine elektrische Leitung (6, 7) zur Stromversorgung und/oder Ansteuerung eines im Ventilgehäuse (1) aufgenommenen Elektromagneten (8) angeschlossen ist, mit Strom versorgt wird. characterized in that the electrical heating device via an electrical line (5) which is connected to at least one electrical line (6, 7) for power and / or control of a valve housing (1) recorded electromagnet (8) is supplied with power ,
9. Verfahren nach Anspruch 7 oder 8, 9. The method according to claim 7 or 8,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung über eine elektrische Leitung (5'), die an eine externe Stromversorgung anschließbar ist, mit Strom versorgt wird. characterized in that the electrical heating device via an electrical line (5 '), which is connectable to an external power supply, is supplied with power.
10. Verfahren nach einem der Ansprüche 7 bis 9, 10. The method according to any one of claims 7 to 9,
dadurch gekennzeichnet, dass die elektrische Heizvorrichtung über einen Temperaturschalter (9), der vorzugsweise ein Bimetall-Schalter ist, zu- und abgeschaltet wird. characterized in that the electrical heating device via a temperature switch (9), which is preferably a bimetallic switch is switched on and off.
EP15729834.0A 2014-06-23 2015-06-17 Electromagnetically actuable proportional flow valve, and method for operating an electromagnetically actuable proportional flow valve Withdrawn EP3158183A1 (en)

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PCT/EP2015/063512 WO2015197433A1 (en) 2014-06-23 2015-06-17 Electromagnetically actuable proportional flow valve, and method for operating an electromagnetically actuable proportional flow valve

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DE102016216343A1 (en) * 2016-08-30 2018-03-01 Robert Bosch Gmbh Method for controlling an electromagnetically controllable inlet valve
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RU2017101851A (en) 2018-07-23
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WO2015197433A1 (en) 2015-12-30
DE102014211942A1 (en) 2015-12-24

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