EP2337933A1 - Dispositif de dosage de carburant - Google Patents

Dispositif de dosage de carburant

Info

Publication number
EP2337933A1
EP2337933A1 EP09780605A EP09780605A EP2337933A1 EP 2337933 A1 EP2337933 A1 EP 2337933A1 EP 09780605 A EP09780605 A EP 09780605A EP 09780605 A EP09780605 A EP 09780605A EP 2337933 A1 EP2337933 A1 EP 2337933A1
Authority
EP
European Patent Office
Prior art keywords
fuel
metering
valve
metering device
pressure fluctuations
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Withdrawn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
EP09780605A
Other languages
German (de)
English (en)
Inventor
Markus Boerner
Jens Benitsch
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 EP2337933A1 publication Critical patent/EP2337933A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/04—Exhaust treating devices having provisions not otherwise provided for for regeneration or reactivation, e.g. of catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1446—Means for damping of pressure fluctuations in the delivery system, e.g. by puffer volumes or throttling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path

Definitions

  • a fuel metering system for the regeneration of particle filters is offered, in particular for heavy commercial vehicles.
  • the system makes it possible to regenerate the particulate filter with targeted injection of fuel, in particular diesel fuel, into the exhaust gas by burning off the soot particles deposited there.
  • a costly coating of the filter or an additive tank for an additive are not required.
  • the device for metering fuel, in particular diesel fuel, upstream of the oxidation catalyst is integrated into a low-pressure fuel circuit. It injects a precisely metered amount of fuel before the oxidation catalyst without compressed air support in the exhaust system.
  • the exhaust gas temperature when flowing through the oxidation catalyst thereby increases sharply in the exhaust system.
  • the soot stored in the particle filter burns down.
  • the flow rate is varied according to the current requirements.
  • the robust and completely maintenance-free system controls the fuel addition as needed and independent of the injection system of the engine.
  • a metering device for fuel in particular diesel fuel
  • a supply device for fuel a closing valve and / or a metering valve and an injection valve are integrated into a fuel line, wherein in the area of the metering device at least one device for Damping of pressure fluctuations is provided.
  • the pressure peaks or pressure signals occurring in the metering device or in the exhaust system can be damped so that no damage occurs to the individual units or to the pressure sensors.
  • Pressure peaks are reduced so much that they are indeed effective and sensed at the individual sensors, but no longer cause damage to the pressure sensors. On the one hand this prevents damage to the sensor components, on the other hand it ensures that sufficient pressure signal that can be evaluated by the sensor system is available.
  • a metering unit for fuel in particular for diesel fuel, is integrated, which is connected to the device for damping pressure fluctuations.
  • the device for damping pressure fluctuations is arranged downstream of a low-pressure circuit or a pump for supplying fuel.
  • the device for damping pressure fluctuations can easily be accommodated in the system at low cost, for example within a metering unit of the metering device for fuel.
  • the metering unit or the metering unit are connected at least via a return line to a tank of the motor vehicle and downstream of the junction of the return line the metering unit is connected to a fuel inlet to the device for damping pressure fluctuations.
  • the device for damping pressure fluctuations is provided in a housing part of the metering unit and has a container or an expansion part in the fuel inlet or in the fuel line or in the housing part for receiving an additional fuel volume and that the container or the Extension part for receiving an additional fuel volume between the closing valve and the metering valve is integrated.
  • occurring pressure fluctuations can be damped and quickly detected and then made available to the control device for continuous fuel supply.
  • faults or defects in the fuel line can be determined at this point and, depending on the disturbance variable, the fuel supply can be interrupted until the fault in the fuel line has been eliminated.
  • the container or the extension part for receiving a fuel volume may advantageously be part of a valve block or the fuel inlet or the fuel line and be formed, for example by a pipe extension - to give an example.
  • the metering valve with at least one pressure sensor is provided on the fuel inlet or on the fuel line after the closing valve.
  • the diagnosis can advantageously be made on a torn-off line or on a leak in the line. If appropriate, it is also possible to control the metering when the pressure sensor is omitted.
  • At least one throttle with a pressure sensor is connected to the fuel inlet between the closing valve and the metering valve.
  • the at least one throttle reduces pressure spikes in front of the sensor and thus reduces the risk of damaging the sensor. From the pressure in front of the metering valve and the required amount of fuel advantageously the opening time of the metering valve can be calculated, optionally there is the possibility to use a temperature sensor to make a temperature-dependent amount correction.
  • Figure 1 is a block diagram of an example of a metering device with various electromagnetically, electronically or pressure-controlled valves according to the prior art
  • Figure 2 shows a first embodiment, wherein a pressure sensor, a variable or static throttle is connected upstream;
  • FIG. 3 shows a block diagram of a further exemplary embodiment with the possibility of integrating an additional attenuation element within the pressure sensor connection.
  • a metering device 10 takes place via a tap point on a low-pressure circuit 3 of a fuel injection system, not further shown in FIG. 1, of an internal combustion engine of the vehicle.
  • a throttle 1 provided in a fuel inlet 16
  • fuel flows to a metering unit 4 which, in FIGS. shown framing and housed in a housing part not shown in the drawing.
  • the closing valve 5 When the closing valve 5 is closed, the entire volume of fuel flows through a spill valve 6, for example as a check valve, back into a tank 7.
  • Das Overflow valve 6 is provided in a return line 7.1 which is connected between the throttle 1 and the metering unit 4 to the fuel inlet 16 and which opens into the tank 7.
  • the low-pressure circuit 3 is subject to pressure fluctuations, which can lead to impairment of the function or even failures of the pressure sensors 8.1 and 14.1 explained below. For this reason, damping measures are advantageous, which can be realized as described below with the aid of devices 14, 15 for damping pressure fluctuations or with an attenuator or an extension part or a receiving space for an additional volume.
  • Throttle 15 according to the embodiment in Fig. 2. b) formation of a generously sized fuel volume by means of the compensation space or an extension part 14 according to the embodiment in Fig. 3rd
  • the pressure sensor 14.1 is connected for optimal determination of the required fuel metering.
  • the downstream of the closing valve 5 arranged pressure sensor 14.1 is used to calculate the required metered amount of fuel. This is made available via the metering valve 8 and conveyed to an injection valve 9.
  • the injection valve 9 is a passive valve which opens at a certain supply pressure and injects fuel, in particular diesel fuel, into the exhaust gas tract.
  • the injection valve 9 When used on the metering device 10, the injection valve 9 is screwed into a heat sink, not shown in the drawing, which is supplied directly via the cooling water circuit of the internal combustion engine of the vehicle.
  • the cooling of the injection valve 9 can also be made possible with the aid of fuel, not shown in the drawing, flowing past the injection valve 9.
  • the metering device 10 for metering in fuel in particular diesel fuel, is arranged in front of a particle filter and an oxidation catalytic converter, which are not shown for reasons of simplification.
  • the basic connection of the pressure sensor 8.1 is the same in FIGS. 2 and 3.
  • the pressure sensor 14. 1 is arranged downstream of the closing valve 5 and connected to the fuel inlet 16 via a throttle 15.
  • a connection can be realized for example by a connection hole with eroded throttle.
  • the connection of the pressure sensor 14.1 to the fuel inlet 16 by means of a sleeve and a sealing ring.
  • an additional volume is made available by means of a volume container 14.
  • the volume container 14 may be formed, for example, as a bore extension.
  • the provision of an additional volume (recommended> 10 cm 3 ) serves as a damping volume within the connection of the pressure sensor 14.1.
  • an enlarged or additional bore can be provided in the metering unit 4.
  • aluminum blocks of solid material present in the metering unit 4 may be drilled or milled to provide said flow connections as well as the additional volumes used for damping.
  • the metering device 10 is connected to the low-pressure circuit 3 according to FIGS. 2 and 3.
  • the injection valve 9 is connected to the low-pressure circuit 3.
  • the injection valve 9 With the help of the passing fuel can be cooled in a cost effective manner, since the exhaust gas temperature when flowing through the oxidation catalyst to about 600 ° C increases. Furthermore, a rapid aging of the fuel stored in the injection valve 9 can be avoided with the aid of a cooling device not shown in the drawing.
  • a fuel return line can be connected to the fuel line 2, which runs back to the tank 7 via a control or adjustable pressure valve.
  • the switchable and / or controllable or controllable closing valve 5 and / or the switchable and / or controllable or controllable metering valve 8 can be provided in the fuel inlet 16 or in the fuel line 2 upstream of the injection valve 9.
  • the metering valve 8 and / or the closing valve 5 are controlled by a control device of the motor vehicle clocked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif de dosage (10) de carburant, notamment de gazole, en amont d'un catalyseur à oxydation d'un système d'échappement d'un moteur à combustion interne. Une soupape de fermeture (5) et/ou une soupape de dosage (8) et une soupape d'injection (9) sont intégrées dans une conduite de carburant (2), en aval d'un dispositif d'alimentation (3) en carburant. Au moins un dispositif (14, 15) d'amortissement de variations de pression est prévu dans la zone du dispositif de dosage (10).
EP09780605A 2008-09-15 2009-07-15 Dispositif de dosage de carburant Withdrawn EP2337933A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008042108A DE102008042108A1 (de) 2008-09-15 2008-09-15 Vorrichtung zur Eindosierung von Kraftstoff
PCT/EP2009/059032 WO2010028888A1 (fr) 2008-09-15 2009-07-15 Dispositif de dosage de carburant

Publications (1)

Publication Number Publication Date
EP2337933A1 true EP2337933A1 (fr) 2011-06-29

Family

ID=41045652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09780605A Withdrawn EP2337933A1 (fr) 2008-09-15 2009-07-15 Dispositif de dosage de carburant

Country Status (5)

Country Link
US (1) US20110173961A1 (fr)
EP (1) EP2337933A1 (fr)
CN (1) CN102159808A (fr)
DE (1) DE102008042108A1 (fr)
WO (1) WO2010028888A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101305600B1 (ko) * 2011-11-29 2013-09-09 기아자동차주식회사 하이드로-카본 연료공급유닛
CN104454280B (zh) * 2014-12-26 2017-02-22 北京亚新科天纬油泵油嘴股份有限公司 一种可控排气燃油计量阀
JP6610481B2 (ja) 2016-09-16 2019-11-27 株式会社デンソー 排気浄化制御装置
DE102017206888A1 (de) 2017-04-25 2018-10-25 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Erhöhen der Abgastemperatur eines Dieselmotors
CN109838295B (zh) * 2017-11-29 2022-12-02 博世动力总成有限公司 柴油发动机的尾气后处理系统及压力波动幅度确定方法
CN112428472A (zh) * 2020-09-28 2021-03-02 马士通安全设备(天津)有限公司 一种聚氨酯自动配色搅拌加工系统及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946900A1 (de) * 1999-06-22 2000-12-28 Bosch Gmbh Robert Vorrichtung zur Dosierung eines Reduktionsmittels
DE19961947A1 (de) * 1999-12-22 2001-06-28 Bosch Gmbh Robert Vorrichtung und Verfahren zur Erzeugung eines Reduktionsmittel-Luftgemisches
JP4055670B2 (ja) * 2003-07-30 2008-03-05 日産自動車株式会社 エンジンの排気浄化装置
US20050252201A1 (en) * 2004-05-17 2005-11-17 Lecea Oscar A Method and apparatus for reducing NOx emissions
DE102005034704A1 (de) * 2005-07-26 2007-02-01 Robert Bosch Gmbh Vorrichtung und Verfahren zur Regeneration eines Partikelfilters
DE102006009099A1 (de) * 2006-02-28 2007-08-30 Daimlerchrysler Ag Einspritzsystem mit einer Vorrichtung zum Dosieren von Kraftstoff in ein Abgassystem einer Brennkraftmaschine und einem Verfahren hierzu
DE102006032155A1 (de) * 2006-07-12 2008-01-24 Daimler Ag Brennkraftmaschine eines Kraftfahrzeugs
DE102006062491A1 (de) * 2006-12-28 2008-07-03 Robert Bosch Gmbh Vorrichtung zur Dosierung von Kraftstoff zum Abgassystem eines Verbrennungsmotors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010028888A1 *

Also Published As

Publication number Publication date
CN102159808A (zh) 2011-08-17
WO2010028888A1 (fr) 2010-03-18
US20110173961A1 (en) 2011-07-21
DE102008042108A1 (de) 2010-03-18

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