WO2012028370A1 - Dispositif de refoulement d'un système d'alimentation en carburant d'un moteur à combustion interne - Google Patents

Dispositif de refoulement d'un système d'alimentation en carburant d'un moteur à combustion interne Download PDF

Info

Publication number
WO2012028370A1
WO2012028370A1 PCT/EP2011/061945 EP2011061945W WO2012028370A1 WO 2012028370 A1 WO2012028370 A1 WO 2012028370A1 EP 2011061945 W EP2011061945 W EP 2011061945W WO 2012028370 A1 WO2012028370 A1 WO 2012028370A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
internal combustion
combustion engine
valve
inlet valve
Prior art date
Application number
PCT/EP2011/061945
Other languages
German (de)
English (en)
Inventor
Peter Roth
Peter Schenk
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 WO2012028370A1 publication Critical patent/WO2012028370A1/fr

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
    • 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
    • F02M59/462—Delivery valves
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0406—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
    • 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
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/02—Fuel evaporation in fuel rails, e.g. in common rails
    • 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
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop

Definitions

  • the invention relates to a delivery device of a fuel supply system of an internal combustion engine with a high-pressure piston pump, a delivery chamber, an inlet valve and an outlet valve.
  • High-pressure piston pump designed as a quantity control valve inlet valve, and designed as a check valve exhaust valve include.
  • High-pressure piston pump is driven by a camshaft of an internal combustion engine.
  • the high-pressure piston pump promotes the one
  • Low-pressure system provided fuel into a rail, which is also referred to as common rail.
  • the common rail is part of the high pressure system and supplies the
  • a pressure sensor detects the pressure prevailing in the common rail and transmits it to an electronic control unit.
  • the control unit controls among others in
  • Pressure relief valve with an opening pressure far above a pressure typically prevailing in the high-pressure system.
  • the high pressure leads to inadvertent leakage from the interfaces in the system, such as fittings, gaskets and valve seats. Disclosure of the invention
  • a basic idea of the invention is to reduce the pressure in the high pressure system with interrupted fuel delivery by means of a defined leakage between high pressure system and low pressure system with existing components. This avoids unintentional leakage at the interfaces in the system, such as fittings, gaskets, and valve seats, and eliminates the need for sealing that causes high manufacturing costs.
  • Another advantage of the invention is that with activated overrun fuel cutoff and rotating engine, the pressure in the high-pressure system increases less or not at all due to the so-called post-heating. As a result, the injectors do not have to open against the high system pressure in the subsequent re-insertion of the injection and inject the small injection low injection quantity with very short, time-dependent activation times. This reduces consumption and emissions.
  • the invention advantageously also prevents the formation of a negative pressure in the high-pressure system. This results from a cooling of the fuel and the associated contraction.
  • the negative pressure in the high pressure system causes oxygen bound in the fuel to outgas and form vapor bubbles.
  • the invention enables a backflow of the fuel from the
  • Flow restrictor is integrated in the exhaust valve. As a result, the design effort on the conveyor itself remains low and the size of the conveyor unit is not affected.
  • a production-technically simple solution is that the flow throttle comprises a notch in a valve seat of the exhaust valve. This component is particularly inexpensive to manufacture.
  • Bypass line is arranged, which is parallel to the exhaust valve.
  • the inlet valve be forcibly
  • the intake valve can be controlled particularly easily. After switching off the internal combustion engine, the fuel flows from the high-pressure system into the delivery chamber of the
  • the invention enables, depending on whether the inlet valve is open or closed, a rapid pressure reduction or a certain pressure maintenance, which accelerates a restart of the internal combustion engine. Furthermore, a method is proposed for operating a conveyor of the type described above.
  • the inlet valve is controlled so that a maximum delivery capacity of the high-pressure piston pump is achieved. This will reduce the pressure in the
  • FIG. 1 shows a schematic representation of a fuel supply system of an internal combustion engine
  • Fig. 2 is a sectional view of an exhaust valve of a
  • a fuel system is shown.
  • the delivery device 10 comprises a fuel pump configured as a high-pressure piston pump 12, an inlet valve 14 arranged on the suction side and an outlet valve 16 arranged on the pressure side.
  • the high-pressure piston pump 12 is driven in a manner not shown in the figure by a camshaft of an internal combustion engine.
  • a high pressure system 20 connects to the exhaust valve 16.
  • the high pressure system 20 includes a common rail 22 and, arranged thereon, a plurality of injectors 24 and a pressure sensor 26th
  • a flow restrictor 28 Arranged parallel to the outlet valve 16 is a flow restrictor 28, which connects the high-pressure system 20 via a bypass line 29 to a delivery chamber 30 of the high-pressure piston pump 12.
  • the flow restrictor may be integrated into the outlet valve 16.
  • a return line 32 leads back to the delivery chamber 30 of the high pressure piston pump 12.
  • the inlet valve 14 designed as a quantity control valve is electrically actuated and is connected by a low-pressure connection 36 to a low-pressure system 38, which comprises a fuel tank 40 and an electric fuel pump 42.
  • a low-pressure connection 36 Arranged on the low-pressure connection 36 is a pulsation damper 44.
  • An electronic control unit bears the reference numeral 46.
  • the above-described conveyor 10 operates as follows:
  • the pressure sensor 26 detects the pressure prevailing in the common rail 22 pressure and transmits it to the electronic control unit 46.
  • the controller 46 causes an opening of the inlet valve 14.
  • the open inlet valve 14 flows fuel from the low pressure system 38 into the delivery chamber 30 of the
  • High-pressure piston pump 12 as long as the inlet valve 14 is opened and the piston of the high-pressure piston pump 12 is in the suction stroke.
  • High-pressure piston pump 12 subsequently increases the pressure of the inflowing fuel and conveys it further to the high-pressure system 20.
  • the injectors 24 When the fuel cut, the injectors 24 remain closed when the internal combustion engine. Due to the waste heat of the internal combustion engine, the fuel remaining in the common rail 22 heats up and expands. A portion of the fuel escapes through the flow restrictor 28 in the
  • Delivery chamber 30 of the high pressure piston pump 12 flows through the open inlet valve 14 back into the low pressure system 42. This is a
  • the inlet valve 14 is opened, so that the fuel located in the common rail 22 and pressurized by the flow restrictor 28 of the exhaust valve 16 according to the invention back into the delivery chamber 30 of
  • High-pressure piston pump 12 flows. From there, the fuel flows through the open inlet valve 14 back into the low pressure system 38. Thus, the pressure in the high pressure system 20 is rapidly reduced. When the inlet valve 14 is closed, the fuel can not over the
  • Inlet valve 14 flow back into the low pressure system 38 so that it passes through the piston gap of the high pressure piston pump 14 in the low pressure system 38. This reduces the pressure reduction speed. As a result, a predeterminable minimum pressure is maintained longer in the high-pressure system 20.
  • a further extension of the pressure maintenance can be inventively achieved in that when stopping the engine by
  • Fig. 2 designed as a check valve outlet valve 16 is shown in detail.
  • a ball 52 is held by a spring 54 downstream against the valve seat 50 and thus closes the fuel passage 48.
  • a notch 56th In the valve seat 50 is incorporated a notch 56th
  • FIG. 3 shows a flow chart of the method according to the invention. It starts in a start block 58.
  • a query block 60 it is checked whether the internal combustion engine with
  • Thrust shutdown operated or shut down.
  • a branch is made to a block 62 in which a conditional branch is made.
  • This shutdown always takes place when the internal combustion engine is to be turned off for a long time. For example, such shutdown occurs when the engine is shut down by the driver by turning off the engine
  • the internal combustion engine is switched off and at the same time the inlet valve 14 is activated in such a way that the delivery rate of the high-pressure piston pump 12 is maximized
  • This shutdown takes place whenever the internal combustion engine is switched off by the engine control, examples of such a shutdown is the start-stop mode or the shutdown of the internal combustion engine in hybrid vehicles
  • High pressure system 20 has exceeded a predetermined maximum value (p max ). If the pressure in the high-pressure system 20 is undesirably high, the inlet valve 14 is opened in the function block 66. Subsequently, it is checked in query block 68 whether a predefinable minimum pressure has been reached. If this is not the case, the system branches again to the query block 64. If the minimum pressure is reached in the Function block 70, the inlet valve 14 is closed. This reduces the pressure reduction rate and the inventive method is completed.
  • p max a predetermined maximum value

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un dispositif de refoulement (10) d'un système d'alimentation en carburant d'un moteur à combustion interne, ledit dispositif présentant une pompe à piston haute pression (12), une chambre de refoulement (30), une soupape d'admission (14) et une soupape d'échappement (16) comprenant un papillon (28) qui relie une zone (18) située en aval de la soupape d'échappement (16) à la chambre de refoulement (30).
PCT/EP2011/061945 2010-08-31 2011-07-13 Dispositif de refoulement d'un système d'alimentation en carburant d'un moteur à combustion interne WO2012028370A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010039974.4 2010-08-31
DE201010039974 DE102010039974A1 (de) 2010-08-31 2010-08-31 Fördereinrichtung eines Kraftstoffversorgungssystems einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2012028370A1 true WO2012028370A1 (fr) 2012-03-08

Family

ID=44628351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061945 WO2012028370A1 (fr) 2010-08-31 2011-07-13 Dispositif de refoulement d'un système d'alimentation en carburant d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102010039974A1 (fr)
WO (1) WO2012028370A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821643A (zh) * 2012-10-05 2014-05-28 马涅蒂-马瑞利公司 燃料供给泵

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4977791B1 (ja) 2011-07-01 2012-07-18 株式会社タクミナ ポンプ及びポンプの運転方法
ITBO20120656A1 (it) * 2012-12-03 2014-06-04 Magneti Marelli Spa Pompa di alimentazione carburante
CN107401466A (zh) * 2017-08-18 2017-11-28 成都威特电喷有限责任公司 高吸油力柴油机单体泵
CN112856002A (zh) * 2020-12-30 2021-05-28 广西宁达汽车科技有限公司 气道防水结构、泄压阀及车辆
CN114087092B (zh) * 2021-11-18 2023-03-31 吉林大学 一种发动机富氧微纳米气泡燃料的供给控制***及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168855A (en) * 1991-10-11 1992-12-08 Caterpillar Inc. Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device
WO2000055503A1 (fr) * 1999-03-18 2000-09-21 Diesel Technology Company Pompe d'injection de carburant et ensemble soupape de reaspiration
DE10236314A1 (de) * 2001-09-08 2003-04-03 Bosch Gmbh Robert Einspritzanlage für Brennkraftmaschinen mit verbesserten Starteigenschaften
WO2009075928A1 (fr) * 2007-12-12 2009-06-18 Robert Bosch Gmbh Clapet anti-retour de tubulure de carburant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168855A (en) * 1991-10-11 1992-12-08 Caterpillar Inc. Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device
WO2000055503A1 (fr) * 1999-03-18 2000-09-21 Diesel Technology Company Pompe d'injection de carburant et ensemble soupape de reaspiration
DE10236314A1 (de) * 2001-09-08 2003-04-03 Bosch Gmbh Robert Einspritzanlage für Brennkraftmaschinen mit verbesserten Starteigenschaften
WO2009075928A1 (fr) * 2007-12-12 2009-06-18 Robert Bosch Gmbh Clapet anti-retour de tubulure de carburant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821643A (zh) * 2012-10-05 2014-05-28 马涅蒂-马瑞利公司 燃料供给泵
CN103821643B (zh) * 2012-10-05 2017-07-28 马涅蒂-马瑞利公司 燃料供给泵

Also Published As

Publication number Publication date
DE102010039974A1 (de) 2012-03-01

Similar Documents

Publication Publication Date Title
DE102004009792B3 (de) Kraftstoffzuführeinrichtung zur Versorgung der Injektoren an Brennräumen einer Brennkraftmaschine mit Kraftstoff
EP3292289A1 (fr) Dispositif de d'injection d'eau pour un moteur à combustion interne, et procédé de fonctionnement d'un tel dispositif d'injection d'eau
EP2217795B1 (fr) Système d'injection de carburant pour un moteur à combustion interne à injecteur de hc
WO2012028370A1 (fr) Dispositif de refoulement d'un système d'alimentation en carburant d'un moteur à combustion interne
WO2002040857A2 (fr) Installation d'injection de carburant pour moteurs a combustion interne a comportement au demarrage ameliore
EP1348072B1 (fr) Procede, programme informatique et appareil de commande et/ou de reglage permettant d'exploiter un moteur a combustion interne et moteur a combustion interne
WO2015169684A1 (fr) Dispositif et procédé pour faire fonctionner un moteur à combustion interne avec un carburant gazeux
WO2013087263A1 (fr) Système de carburant pour un moteur à combustion interne pouvant être alimenté par au moins deux types de carburant
DE102009055037B4 (de) Common Rail Minimaldruck zum schnellen Druckaufbau
WO2011141273A1 (fr) Procédé pour fournir une pression de rampe suffisante pour faire redémarrer un moteur à combustion interne à rampe commune
EP2379359B1 (fr) Système d'entraînement hybride
DE102009017472B4 (de) Verfahren zum Absenken des Kraftstoffdrucks in einem rücklauffreien Kraftstoffversorgungssystem
DE102007029808A1 (de) Verfahren zum Entlüften einer Kraftstoffeinspritzleitung eines direkteinspritzenden Verbrennungsmotors
EP2795085B1 (fr) Procédé et dispositif permettant de commander l'amenée de carburant à un moteur à combustion interne fonctionnant au gpl
WO2011032773A1 (fr) Système d'injection de carburant
EP1339961B1 (fr) Procede, programme d'ordinateur et appareil de commande et/ou de reglage permettant de faire fonctionner un moteur a combustion interne
DE102011001321A1 (de) Kraftstoffdrucksteuervorrichtung
DE102017221342B4 (de) Toleranz- und Verschleißkompensation einer Kraftstoffpumpe
DE102010062440B4 (de) Kraftstoffeinspritzsystem für eine Brennkraftmaschine
DE10225148B4 (de) Einspritzeinrichtung und Verfahren zu deren Betrieb
DE102017207479A1 (de) Verfahren zum Betreiben eines Kraftstoffversorgungssystems einer Brennkraftmaschine
WO2004061293A1 (fr) Unite d'injection de carburant
DE102017216162A1 (de) Wassereinspritzvorrichtung für eine Brennkraftmaschine
DE102009060058A1 (de) Common-Rail-Kraftstoffeinspritzsystem und Verfahren zum Betrieb eines solchen
DE10352005A1 (de) Verfahren zum Betreiben einer Brennkraftmaschine

Legal Events

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

Ref document number: 11730989

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 11730989

Country of ref document: EP

Kind code of ref document: A1