CN103339368A - Relief valve of a fuel injection system - Google Patents

Relief valve of a fuel injection system Download PDF

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Publication number
CN103339368A
CN103339368A CN2011800656528A CN201180065652A CN103339368A CN 103339368 A CN103339368 A CN 103339368A CN 2011800656528 A CN2011800656528 A CN 2011800656528A CN 201180065652 A CN201180065652 A CN 201180065652A CN 103339368 A CN103339368 A CN 103339368A
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CN
China
Prior art keywords
steel
valve
relief valve
piston
fuel
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.)
Granted
Application number
CN2011800656528A
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Chinese (zh)
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CN103339368B (en
Inventor
F·卢卡雷利
S·贝桑松
M·拉姆
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of CN103339368A publication Critical patent/CN103339368A/en
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Publication of CN103339368B publication Critical patent/CN103339368B/en
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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
    • 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
    • F02M59/445—Selection of particular materials
    • 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
    • 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
    • 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
    • F02M2200/90—Selection of particular materials
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a relief valve (7) of a fuel injection system for an internal combustion engine, wherein the relief valve (7) comprises at least a valve housing (8), a piston (9), and a valve spring retainer (11). According to the invention, such a relief valve (7) is improved with respect to operation in a fuel-critical manner. The aim is achieved in that at least one component of the relief valve (7) is manufactured of a non-steel material.

Description

The relief valve of fuel injection system
Technical field
The present invention designs a kind of relief valve of the fuel injection system for internal-combustion engine, and wherein, described relief valve has at least one valve chest, piston and valve spring holder.
Background technique
From the known this relief valve of DE102006018702A1.This relief valve uses at the common rail pump that is used for internal-combustion engine, and the amount of domination suction side is regulated.Thereby the result has only much more very fuel compressed and be transferred in the described track, needs under various states as internal-combustion engine.Therefore avoided unwanted energy consumption, as for the adjusted system of pressure.
Usually known in the area of low pressure of rail pump altogether the amount of suction side regulate by solenoid valve (so-called measuring unit (ZME)) and realize.Under measuring unit flow through and change by the electric control adjustment of movable component (so-called valve piston) its flow by fuel.In order to make described measuring unit about the mechanical relief valve of the stable as far as possible installation usually of inlet pressure of fuel.It is stable as far as possible or maintain in the pressure range of restriction that this relief valve is paid close attention to pressure before the described measuring unit.Each parts of known relief valve are made with metal.
Summary of the invention
Task of the present invention provides a kind of relief valve, and it is being modified with little manufacturing expense aspect the important operation of fuel.
This task is made with non-steel material by at least one parts of described relief valve and is solved.
The principle of this design proposal is that relief valve all is to make with steel part uniquely up to now, does not have specific corrosion protection.Specific corrosion protection also is unwanted in normal fuel operation (satisfy given in advance with requirement standard).Yet the use of this relief valve or fuel injection system increases in the important market of fuel.In the important market of the fuel of water content high fuel, especially diesel fuel, site test shows that piston especially is subjected to the erosion of aqueous fuel, causes that slip surface is corroded in the valve chest.Therefore cause obviously high retardation phenomenon, this causes the high-pressure service pump neutralization to also have function error in the low service system of fuel injection system again.Corrosion because of on the parts that fuel flows through in relief valve additionally causes the corrosion particle to enter into described low service system in large quantities.But described corrosion particle can also arrive in principle for high tension loop high-pressure service pump and fuel injector, that have the damage risk.
The use of the increase of biodiesel fuel or mix may cause this function error equally, and it is to cause because clinging (for example biofuel by wearing out).
At least one parts by described relief valve are made with non-steel material, at least one parts of described relief valve are because the problem scenario that the different service condition that listed in the past and therefore correspondingly determining causes, the operation of described relief valve and thereby the operation of whole fuel injection system important operation can be modified about fuel.Here manufacturing expense is not higher than the manufacturing expense of traditional relief valve at least, and is common even lower, thereby depends on various materials and select, and described manufacture cost can keep lower than the relief valve of routine.
In improvement project of the present invention, described fuel is stable to the water and the chemical reagent that contain in critical fuel.Therefore do not need the high application additional surface protection high with cost of expense, nitrocarburizing for example is to avoid the corrosion of corresponding part.In addition, described piston is the most dangerous parts, but explains still below together also basically that wherein the combination of materials of each parts is possible.
In improvement project of the present invention, the surface of described material has super hydrophobic performance.Therefore, described surface has so-called Lao Tusi effect (Lotus-Effekt), thereby obviously reduces the tendency that precipitates.
In another design proposal of the present invention, described material is resisted the precipitation that is caused by aging biomaterial enduringly.
In improvement project of the present invention, described material is plastics, for example thermoplastic or thermosetting plastics.In principle, described material is any non-steel material in universal instance, and for example copper, aluminium or materials similar are modified or otherwise be especially suitable by specific alloy for example at corresponding service condition in case of necessity.But what emphasize is that plastic materials is especially suitable.Plastic materials also causes piston for example to reduce with respect to the tangible weight of steel modification, and this reflects in the reaction faster of relief valve.Further, the load on the pistons stops reduces, and described pistons stops for example may be filter.
In improvement project of the present invention, valve spring is fixed on the described piston.Avoid wearing and tearing unnecessary between described valve spring and the piston by this design proposal.Described fixing maintenance flange that for example can be by described pistons end is with respect to the realization of allowance a little of spring inner diameter.
The weight that reduces with the piston of plastic materials manufacturing causes reacting phenomenon fast and thereby has improved exhaust under beginning situation and idle running situation.
In improvement project of the present invention, especially (plastics) parts are made with gunite.Thus, the minimizing that the essential machinery of described parts repeats to process, especially axially surface of contact and the interior and highi degree of accuracy gunite realization of external shape by so using during fabrication.Therefore because reducing and further shortened process time above the processing.Further, obtain the reduction of the expense of washing because of littler processing residual (particulate dirt).In a word, because reduction and the reduction of processing charges on the other hand of cost of material on the one hand, thereby manufacture cost reduces.
In improvement project of the present invention, can present the following combination of materials of each parts:
A) valve chest (steel), piston (non-steel), valve spring holder (steel);
B) valve chest (non-steel), piston (non-steel), spring holder (steel);
C) valve chest (non-steel), piston (non-steel), valve spring holder (non-steel);
D) valve chest (non-steel), piston (steel), valve spring holder (non-steel);
E) valve chest (steel), piston (non-steel), valve spring holder (non-steel);
F) valve chest (steel), piston (steel), valve spring holder (non-steel).
In these combinations, especially modification a), b), c) and f) especially suitable.
Description of drawings
How favourable design proposal of the present invention is learnt from description of drawings, describes embodiment illustrated in the accompanying drawings of the present invention in description of drawings in more detail.Shown in the drawings:
Fig. 1 is used for the schematic representation of the low service system of fuel injection system for IC engine;
Fig. 2 is according to the exploded view of relief valve of the present invention.
Embodiment
Fig. 1 illustrates the low service system for the fuel injection system of internal-combustion engine common-rail injection system, and especially with the diesel fuel operation, described low service system has low pressure pump 1 to described internal-combustion engine, and fuel is transported to the measuring unit 4 by filtrating equipment 3 from chest 2.Measuring unit 4 is flow through by fuel and the adjustment of the electric control by movable component changes its flow, thereby the fuel quantity of accurately determining arrives in the pump work chamber of described high-pressure service pump by safety check 5.This fuel quantity is by the compression of the high-pressure service pump of fuel injection system and be transported under the pressure up to 3000 bar in the high pressure accumulator (track), and described fuel is ejected in the affiliated firing chamber of internal-combustion engine by fuel injector controllably by described high pressure accumulator (track).Have only many fuel to be transported in the described high pressure accumulator thus, as by as described in fuel injector extract, the pressure in the described high pressure accumulator keeps approximately constant at least.This accurate operation for fuel injection system is favourable.
Guide relief valve 7 by measuring unit 4 by reflux line 6 by the unwanted fuel that the low pressure pump 1 of delivered constant delivered volume is carried, relief valve 7 is expelled back into described unwanted fuel quantity in the chest 2.Relief valve 7 keeps the fuel pressure before the measuring unit 4 to arrive the pressure of approximately constant at least.
Fig. 2 illustrates the exploded view of relief valve 7.Relief valve 7 has valve chest 8, piston 9, valve spring 10, valve spring holder 11, O shape ring 12, filter 13, dish 14, holder 15 and annular sealing ring 16.
Piston 9 is especially made of plastic, and for the general assembly of relief valve 7, piston 9 is inserted in the cylinder-bore 17 that runs through valve chest 8 and presses valve holder 11 by valve spring 10 and supports, and valve spring 10 is installed in the cylinder-bore 17 in the left side in tip side.
O shape ring 12 is placed on the valve chest 8 up to clinging on the flange 18, and annular sealing ring 16 is arranged in the circular groove 19.O shape ring 12 is sealed in the recirculation zone that introduce below, relative with the supply area that the relief valve 7 in the housing is settled with annular sealing ring 16.Filter 13 abuts on the right-hand member of valve chest 8 and keeps under middle land 14 and holder 15 situations, and holder 15 is rolled in the circular groove 19.Here, crimping is embodied as and makes crimping not hinder annular sealing ring 16 to abut in hermetically in the circular groove 19.
Under relaxed state, piston 9 filter 13 and mobile in cylindrical hole 17 under valve spring 10 texturizing conditions by the fuel that flows through filter 13 that reclines passes outlet 20 up to fuel.Isostasy hole 21 in the zone of valve spring 10 with cylindrical hole 17 mating reactions, isostasy hole 21 is led in the chest 2 in the loops that valve sticks up the relief valve 7 shown in leg 8 outsides and outlet 20 misconnection and the pie graph 1, and the return line 6 shown in Fig. 1 leads in the filter 13.In order to make the compact example of fuel injection system, whole relief valve 7 is incorporated in the high-pressure service pump with measuring unit 4, is configured for the overflow valve housing then.

Claims (8)

1. relief valve (7) that is used for the fuel injection system of internal-combustion engine, wherein, described relief valve (7) has at least one valve chest (8), piston (9) and valve spring holder (11), it is characterized in that, at least one parts of described relief valve (7) are made with non-steel material.
2. relief valve according to claim 1 (7) is characterized in that, described non-steel material is resisted water and chemical reagent.
3. relief valve according to claim 1 and 2 (7) is characterized in that, the surface of described material has super hydrophobic performance.
4. according to the described relief valve of aforementioned each claim, it is characterized in that described material is resisted the precipitation that is caused by aging biomaterial enduringly.
5. according to the described relief valve of aforementioned each claim (7), it is characterized in that described material is plastics.
6. according to the described relief valve of aforementioned each claim (7), it is characterized in that a valve spring (10) is fixed on the described piston.
7. according to the described relief valve of aforementioned each claim, it is characterized in that described parts are made with gunite.
8. according to the described relief valve of aforementioned each claim, it is characterized in that each parts are following combination of materials:
A) valve chest (steel), piston (non-steel), valve spring holder (steel);
B) valve chest (non-steel), piston (non-steel), spring holder (steel);
C) valve chest (non-steel), piston (non-steel), valve spring holder (non-steel);
D) valve chest (non-steel), piston (steel), valve spring holder (non-steel);
E) valve chest (steel), piston (non-steel), valve spring holder (non-steel);
F) valve chest (steel), piston (steel), valve spring holder (non-steel).
CN201180065652.8A 2011-01-25 2011-12-30 The overflow valve of fuel injection system Active CN103339368B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE201110003089 DE102011003089A1 (en) 2011-01-25 2011-01-25 Overflow valve of a force injection system
DE102011003089.1 2011-01-25
PCT/EP2011/074319 WO2012100898A1 (en) 2011-01-25 2011-12-30 Relief valve of a fuel injection system

Publications (2)

Publication Number Publication Date
CN103339368A true CN103339368A (en) 2013-10-02
CN103339368B CN103339368B (en) 2016-08-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201180065652.8A Active CN103339368B (en) 2011-01-25 2011-12-30 The overflow valve of fuel injection system

Country Status (5)

Country Link
EP (1) EP2668391A1 (en)
CN (1) CN103339368B (en)
DE (1) DE102011003089A1 (en)
RU (1) RU2604980C2 (en)
WO (1) WO2012100898A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012219072A1 (en) 2012-10-19 2014-04-24 Robert Bosch Gmbh Pressure relief valve for high-pressure fuel pump of common-rail fuel injection system in internal combustion engine, has bore whose end comprises annular gap larger than annular gap formed between guide region and guide portion of piston
ITMI20130128A1 (en) * 2013-01-29 2014-07-30 Bosch Gmbh Robert PUMPING GROUP FOR FOOD FUEL, PREFERIBLY GASOIL, FROM A CONTAINMENT TANK TO AN INTERNAL COMBUSTION ENGINE
DE102013210760A1 (en) 2013-06-10 2014-12-11 Robert Bosch Gmbh High-pressure fuel pump for a fuel system for an internal combustion engine
DE102016226077A1 (en) 2016-12-22 2018-06-28 Robert Bosch Gmbh Overflow valve, in particular for use in a fuel injection system, high-pressure pump and fuel injection system
IT201900006571A1 (en) * 2019-05-06 2020-11-06 Bosch Gmbh Robert PUMPING GROUP TO FEED FUEL, PREFERABLY DIESEL, TO AN INTERNAL COMBUSTION ENGINE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036939A1 (en) * 2000-07-28 2002-02-21 Siemens Ag Flushing valve for fuel pump for common rail diesel engine comprises valve body mounted on spring and first throttle channel in front of it, components being mounted in sleeve with groove on its outside acting as second throttle channel
US20030034073A1 (en) * 2001-08-16 2003-02-20 Roth Robert A. Check valve for fuel pump
US6830439B2 (en) * 2002-04-08 2004-12-14 Airtex Products Electric fuel pump with universal relief valve installed in the pump inlet
EP1455084B1 (en) * 2003-03-04 2006-05-24 Delphi Technologies, Inc. Check valve for fuel pump
EP2422121B1 (en) * 2009-04-22 2013-01-16 Eaton Corporation Valve assembly for high-pressure fluid reservoir

Family Cites Families (7)

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DE2927110A1 (en) * 1979-07-05 1981-01-08 Audi Nsu Auto Union Ag FUEL INJECTION SYSTEM
US5183075A (en) * 1986-04-12 1993-02-02 Stein Guenter Check valve
US6068022A (en) * 1999-08-25 2000-05-30 Schrader-Bridgeport International, Inc. Jet pump with improved control valve and pressure relief valve therefore
US20030037823A1 (en) * 2001-08-22 2003-02-27 Pickelman Dale M. Regulator valve for fuel pump
DE102006007583A1 (en) * 2006-02-18 2007-08-23 Schaeffler Kg check valve
DE102006018702A1 (en) 2006-04-21 2007-10-25 Robert Bosch Gmbh Fuel high-pressure conveying device
DE102008043500A1 (en) * 2008-11-05 2010-07-01 Robert Bosch Gmbh Connection for housing of high-pressure unit for high pressure-fuel generation in injection system of internal combustion engine, comprises annular flange, which is provided in area of joint of high pressure unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036939A1 (en) * 2000-07-28 2002-02-21 Siemens Ag Flushing valve for fuel pump for common rail diesel engine comprises valve body mounted on spring and first throttle channel in front of it, components being mounted in sleeve with groove on its outside acting as second throttle channel
US20030034073A1 (en) * 2001-08-16 2003-02-20 Roth Robert A. Check valve for fuel pump
US6830439B2 (en) * 2002-04-08 2004-12-14 Airtex Products Electric fuel pump with universal relief valve installed in the pump inlet
EP1455084B1 (en) * 2003-03-04 2006-05-24 Delphi Technologies, Inc. Check valve for fuel pump
EP2422121B1 (en) * 2009-04-22 2013-01-16 Eaton Corporation Valve assembly for high-pressure fluid reservoir

Also Published As

Publication number Publication date
DE102011003089A1 (en) 2012-07-26
RU2604980C2 (en) 2016-12-20
RU2013139223A (en) 2015-03-10
CN103339368B (en) 2016-08-10
EP2668391A1 (en) 2013-12-04
WO2012100898A1 (en) 2012-08-02

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