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
  • 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
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
  • F02M63/0012—Valves
  • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
  • F02M63/005—Pressure relief valves
  • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
  • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
  • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
  • F02M63/023—Means for varying pressure in common rails
  • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • 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
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0644—One-way valve
  • F16K31/0655—Lift valves
  • F16K31/0665—Lift valves with valve member being at least partially ball-shaped
• • 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
  • F16K31/00—Actuating devices; Operating means; Releasing devices
  • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
  • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
  • F16K31/0686—Braking, pressure equilibration, shock absorbing
  • F16K31/0693—Pressure equilibration of the armature

Definitions

• the invention relates to a pressure regulating valve for pressure regulation in a high-pressure fuel accumulator of an internal combustion engine having the features of the preamble of claim 1.
• Such a pressure control valve is known for example from the published patent application DE 10 2004 002 964 A1. It comprises a closing element which is accommodated in a valve chamber and which can be actuated by a magnetic actuator, which closes or releases a connection from the high-pressure accumulator into a low-pressure line. Furthermore, the valve comprises a spring element which is arranged such that when the internal combustion engine is at a standstill, the connection from the high-pressure accumulator to the low-pressure line is released.
• the spring element is supported on the one hand on an anchor plate and on the other hand on a radial shoulder of a stepped bore formed in a valve housing, in which further a valve piston connected to the anchor plate is received.
• pressure oscillations can be transmitted to the pressure control valve.
• These pressure oscillations can result in the valve piston of the pressure regulating valve making uncontrollable movements and the pressure regulating valve possibly opening unintentionally. This is to be avoided, since the pressure drop caused in the high-pressure accumulator when the pressure regulating valve is opened can lead to instabilities and, if necessary, to a minimum pressure required for starting the engine.
• the pressure regulating valve can be excited to natural oscillations over the low pressure range, which lead to undesirable pressure peaks in the low-pressure system and / or to unpleasant noise developments.
• the present invention is therefore based on the object to provide a pressure control valve for pressure control in a high-pressure fuel storage, which allows compensation of such pressure oscillations or pressure waves and thus ensures greater reliability.
• the proposed for pressure control in a fuel high-pressure accumulator of an internal combustion engine pressure control valve comprises an axially slidably received in a bore of a valve housing, acting on a valve closing element in the direction of a valve seat valve piston which is connected at its end facing away from the valve seat with an armature of a magnetic assembly for actuating the pressure control valve is.
• the armature in an armature space and the valve closing element are accommodated in a valve chamber.
• the valve space and the armature space are hydraulically connected via at least one groove and / or bore formed in the valve housing, in the valve piston and / or in the armature, and at least one throttle.
• the hydraulic connection of the valve chamber with the armature space causes an enlargement of the compensation for any pressure oscillations or
• At least one groove is provided for the hydraulic connection of the valve space to the armature space, this is preferably substantially axially running, on the outer circumference side on the valve piston and / or in the wall of the
• Valve piston receiving bore of the valve housing formed. With the respective opposite wall surface of the bore or the outer peripheral surface of the valve piston, the groove then forms a channel which ensures the hydraulic connection.
• at least one groove may be formed on the armature.
• the anchor can be the groove in the area of his
• the groove extends substantially radially.
• at least one bore is provided for the hydraulic connection of the valve chamber to the armature space, this is preferably provided in the valve piston and / or in the valve housing.
• the bore is formed substantially axially extending and opens via a transverse bore in the valve chamber and / or the armature space.
• a bore can be provided in the armature. At least one provided in the anchor groove and / or
• Drilling facilitates or facilitate pressure equalization within the armature space.
• the at least one throttle is preferably formed in the groove and / or the bore.
• the cross section of the groove and / or the bore can be reduced such that a throttle is formed.
• a throttle element may be inserted into the groove and / or bore.
• the groove and / or the bore is or are designed to be stepped in order to form at least one throttle. leads. Through the stage, the required cross-sectional reduction is effected to form the throttle.
• At least one throttle of the groove and / or the bore is connected upstream.
• the throttle is used
• the throttle of the groove or bore is connected downstream, it serves to connect the groove and / or the bore with the armature space. Both embodiments have the advantage that the proximity to the valve chamber or the armature space facilitates the formation of the throttle.
• a guide section of the bore of the valve housing can also form at least one throttle.
• the clearance between the valve piston received in the bore and the valve housing is designed such that the desired
• valve space can be connected to a return directly via at least one radial bore formed in the valve housing. Via the connection with the return line, the amount of fuel flowing through the valve can be fed to a fuel storage tank.
• the at least one radial bore serves as a valve outlet.
• the cross-sectional high flow velocity of the fuel in the region of such a radial bore serving as a valve outlet can lead to the formation of pressure waves and / or to backpressure, provided that the valve outlet is in direct communication with the valve chamber.
• the back pressure in the valve chamber causes an optionally additional pressure difference between the pressure in the valve chamber and the pressure in the armature space.
• the valve chamber can be indirectly connected via the armature space with a return.
• the indirect connection via the armature space takes place with the interposition of at least one groove and / or bore and at least one throttle in order to avoid the propagation of pressure waves.
• an additional hydraulic volume may be provided in the form of a blind hole formed in the valve housing.
• the blind hole opens into the armature space and is therefore hydraulically connected via the at least one groove and / or bore and the at least one throttle with the valve chamber.
• the additional hydraulic volume serves as a compensation volume and thus improves the compensation or damping of pressure waves.
• the natural frequency of the pressure control valve can be influenced or tuned to the low pressure circuit that the risk of natural vibration is reduced.
• the armature is designed as a flat armature or as a plunger armature.
• the proposed concept is thus largely independent of the specific design of the magnetic circuit or the magnetic assembly for actuating the pressure control valve and the spring position.
• Pressure control valve can therefore be designed as normally closed or normally open valve.
• FIG. 1 shows a schematic longitudinal section through a first preferred embodiment of a pressure control valve according to the invention
• Fig. 2a shows a schematic longitudinal section through a second preferred embodiment of a pressure control valve according to the invention
• FIG. 2b shows a modification of the valve piston shown in FIG. 2a
• FIG. 3 shows a schematic longitudinal section through a third preferred embodiment of a pressure control valve according to the invention
• FIG. 4 shows a schematic longitudinal section through a fourth preferred embodiment of a pressure regulating valve according to the invention
• 5 shows a schematic longitudinal section through a fifth preferred embodiment of a pressure regulating valve according to the invention
• FIG. 6 shows a schematic longitudinal section through a sixth preferred embodiment of a pressure regulating valve according to the invention
• FIG. 7 shows a schematic longitudinal section through a seventh preferred embodiment of a pressure regulating valve according to the invention
• FIG. 8 shows a schematic longitudinal section through an eighth preferred embodiment of a pressure regulating valve according to the invention
• FIG. 9 is a schematic longitudinal section through a ninth preferred embodiment of a pressure control valve according to the invention.
• FIG. 10 shows a schematic longitudinal section through a tenth preferred embodiment of a pressure control valve according to the invention.
• FIG. 1 shows the structure of a first preferred embodiment of a pressure control valve according to the invention.
• a bore 1 is formed, in which a valve piston 5 is guided axially displaceable.
• the guide section is identified by the reference numeral 13.
• the valve housing 2 has at a first end an annular receiving space for a magnetic coil 20 of a magnet assembly 7, which is formed coaxially to the bore 1 and surrounds it.
• An armature space 8 adjoins the receiving space, in which an armature 6, cooperating with the magnet coil 20, of the magnet assembly 7 is accommodated.
• the armature space 8 is surrounded by a cup-shaped cover part 21, so that further a receiving space for a spring 19 is provided, whose spring force loads the armature 6 in the direction of a valve seat 4.
• the magnetic force of the magnetic coil 20 acts in the same direction as the spring force of the spring 19, so that via the magnetic coil 20, a further closing force can be realized.
• the hydraulic pressure applied to the valve inlet side ie the pressure in the high-pressure reservoir, must increase in such a way that at least the spring force of the spring the 19 is overcome.
• the invention also includes pressure control valves in which the magnetic force acts against the spring force.
• the armature 6 is connected to the valve piston 5 guided axially displaceably in the bore 1 of the valve housing 2 in such a way that the spring force of the spring 19 and the magnetic force of the magnet coil 20 restrain the armature 6 and the valve piston 5 with a closing force in the direction of the valve seat 4 apply.
• valve inlet 15 designed as a central bore in a valve piece 16, a valve chamber 9 and at least one radial bore 14 serving as a valve outlet, thus causing a pressure drop in the high-pressure accumulator.
• the valve piece 16 is supported on the valve housing 2 via a spacer 17.
• the actual invention is realized in the present case by a formed in the valve housing 2 bore 1 1 and a throttle 12, which connect the valve chamber 9 and the armature chamber 8 hydraulically.
• the bore 1 1 is designed as a stepped bore, that is, that it has a reduced flow cross-section in the region of the throttle 12.
• the bore 1 1 or the throttle 12 opens into the valve bore serving as a radial bore 14, so that the bore 1 1 and the throttle 12 are indirectly connected via the radial bore 14 with the valve chamber 9.
• the other end of the bore 1 1 opens directly into the armature space 8, wherein an additional groove 10 provided in the armature 6 and an additional bore 1 1 facilitate the pressure equalization within the armature space 8.
• the bore 1 1 produced hydraulic connection of the valve chamber 9 with the armature chamber 8 increases the hydraulic volume, which is available to compensate for pressure oscillations or pressure waves.
• pressure vibrations or pressure peaks introduced into the valve chamber via the low-pressure circuit connected on the output side can be compensated or at least damped, so that a higher functional reliability of the pressure control valve is ensured.
• the pressure equalization is also faster.
• FIG. 2a A second preferred embodiment is shown in FIG. 2a.
• the bore 1 1 and the throttle 12 are formed here in the valve piston 5.
• the Dros- 12 is designed as a transverse bore, which connects the valve chamber 9 with the bore 1 1.
• Fig. 2b A modification of this embodiment is shown in Fig. 2b, in which the throttle 12 is designed as a branch channel with a reduced cross section with respect to the cross section of the bore 1 1.
• FIG. 3 A third preferred embodiment is shown in FIG. 3.
• the bore 1 1 is in turn formed in the valve piston 5 and opens into a transverse bore, wherein the bore 1 1 and the transverse bore have the same cross-section.
• the transverse bore also does not open directly into the valve chamber 9, but opens into an annular gap, which is formed between the valve piston 5 and the valve housing 2 and serves as a guide section 13.
• the guide portion 13 At least in the lower area, i. in the region between the valve chamber 9 and the bore 1 1 and the transverse bore, the guide portion 13 therefore has a radial clearance, which brings about the desired throttle effect.
• FIGS. 4 and 5 show exemplary embodiments which are very similar to that of FIG. While the example of FIG. 4 shows a bore 1 1 designed as a stepped bore for forming the throttle 12, FIG. 5 shows an example with a separately formed throttle.
• FIG. 6 A first further supplementary measure is shown in FIG. 6.
• the valve housing 2 in addition to the bore 1 1 a further axially extending bore, which, however, is designed as a blind hole and creates an additional hydraulic volume 18, in which the armature chamber 8 expands.
• the additional hydraulic volume 18 not only promotes the compensation or damping of pressure oscillations, but also alters the natural frequency of the pressure regulating valve in order to counteract natural oscillations.
• a bore 11 may be provided in the armature 6.
• the bore 1 1 can be arranged in the extension of a bore 1 1 in the valve housing 2 or offset thereto.
• a groove 10 is also preferably provided on the underside of the armature 6, which connects the two holes 1 1 (see Fig. 1).
• valve space 9 is via the radial bore 14, the throttle 12, the hole 1 1 and the armature chamber 8 connected to the low pressure circuit.
• the significantly extended flow path counteracts the transmission of pressure oscillations from the low-pressure circuit.
• the influence of the flow velocity of the fuel flowing off via the radial bore 14 is reduced.
• FIG. 9 A further preferred embodiment of the invention is shown in FIG. 9, which differs from the preceding in that the throttle 12 of the bore 1 1 is connected downstream.
• the bore 1 1 opens on the one hand via the throttle 12 in the armature space 8 and on the other hand via the radial bore 14 in the valve chamber 9.
• FIGS. 6 to 8 the further education measures illustrated in connection with FIGS. 6 to 8 can be executed in addition.
• FIG. 9 a further alternative embodiment is shown in FIG.
• the armature 6 is formed as a plunger and is of the spring force of Spring 19 loaded in the opening direction.
• the valve is therefore designed as a normally open valve.
• the hydraulic connection of the valve chamber 9 with the armature chamber 8 is in the present case made via grooves 10 which are formed axially extending in the wall of the bore 1 of the valve housing 2 at an equidistant distance.
• the grooves In a lower portion of the same time serving as a guide portion 13 bore 1, the grooves have a reduced cross section, so that throttles 12 are formed, which connect the grooves 10 with the valve chamber 9.
• FIGS. 6 to 8 can be executed in addition.
• valve housing has been greatly simplified by, for example, has been dispensed with the representation of the valve seat 4 and / or the valve inlet 15 and / or a differentiated representation of the valve member 16. Nevertheless, these are also available. The same applies to the magnet assembly 7, if not shown or greatly simplified.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Magnetically Actuated Valves (AREA)
• Safety Valves (AREA)
• Fuel-Injection Apparatus (AREA)
• Electromagnets (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47716034

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (3)

Citations (4)

Family Cites Families (13)

• 2012
  • 2012-03-15 FR FR1252350A patent/FR2988140B1/fr active Active
• 2013
  • 2013-02-13 US US14/384,756 patent/US10422308B2/en active Active
  • 2013-02-13 JP JP2014561340A patent/JP5946545B2/ja active Active
  • 2013-02-13 EP EP13704423.6A patent/EP2825766B1/de active Active
  • 2013-02-13 IN IN7182DEN2014 patent/IN2014DN07182A/en unknown
  • 2013-02-13 CN CN201380014213.3A patent/CN104169567B/zh active Active
  • 2013-02-13 WO PCT/EP2013/052884 patent/WO2013135450A1/de active Application Filing

Patent Citations (4)

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