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WO2012059267A1 - Système d'injection de carburant d'un moteur à combustion interne - Google Patents

Système d'injection de carburant d'un moteur à combustion interne Download PDF

Info

Publication number
WO2012059267A1
WO2012059267A1 PCT/EP2011/066401 EP2011066401W WO2012059267A1 WO 2012059267 A1 WO2012059267 A1 WO 2012059267A1 EP 2011066401 W EP2011066401 W EP 2011066401W WO 2012059267 A1 WO2012059267 A1 WO 2012059267A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injection
injection system
pump
throttle
valve
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.)
Ceased
Application number
PCT/EP2011/066401
Other languages
German (de)
English (en)
Inventor
Achim Koehler
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
Priority to EP11757896.3A priority Critical patent/EP2635791B1/fr
Priority to KR1020137011510A priority patent/KR101900965B1/ko
Priority to RU2013125689/06A priority patent/RU2573068C2/ru
Priority to CN201180052758.4A priority patent/CN103201495B/zh
Priority to JP2013537051A priority patent/JP5727617B2/ja
Publication of WO2012059267A1 publication Critical patent/WO2012059267A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • 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
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device
    • 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
    • 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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection system of an internal combustion engine, with a tank which is connected via a pre-pressure pump with a pump interior of a high-pressure pump, wherein the pump interior is connected via a metering unit with a pump working space and further the pump interior via an overflow valve, comprising a valve housing, a valve piston and arranged in a spring chamber valve spring, is hydraulically connected to a return line.
  • Such a fuel injection system of an internal combustion engine is known from DE 10 2008 042 089 A1.
  • the switched hydraulic space of the metering unit is connected via a fuel line with three pump working spaces of the high-pressure pump.
  • the overflow valve of this fuel injection system has a hollow-bore piston with an inserted throttle, which connects the spring chamber of this overflow valve with its inlet.
  • the invention has for its object to provide a fuel injection system in which the filling pressure of a pump working space is dependent on the flow rate adjustable. Disclosure of the invention
  • this throttle circuit which acts as a pressure divider, depending on the pressure, which controls the metering unit, a higher or lower pressure in the spring chamber of the overflow valve, which is more precisely a differential pressure control valve is set.
  • the pressure upstream of the overflow valve thus consists of the purely mechanical portion of the valve spring characteristic and the hydraulic pressure in the spring chamber. Since the pressure in the spring chamber can be varied, it is also possible to vary the pressure upstream of the overflow valve.
  • the throttle circuit is a line connection with a throttle on. Since the metering unit and the overflow valve are normally integrated directly into the pump housing of the high-pressure pump, the line connection may be formed, for example, as a connecting channel. In this case, the throttle is realized by a throttle element inserted into the connecting channel or by a diameter reduction in the manufacturing process of the line connection.
  • the spring chamber is connected to the return line, wherein in a further embodiment in the return line a remindströmdrossel is turned on.
  • the return line can also be connected to the line connection at any point behind the switched throttle, wherein the remindströmdrossel downstream of this connection point must be turned on in the return line.
  • the throttle has a lower throttle rate than the remindströmdrossel.
  • the flow cross section through the throttle is greater than that through the remindströmdrossel.
  • a Ab Kunststoff the spill valve is connected to the return line.
  • bearing lubricant discharge lines of the high-pressure pump are connected to the return line. Due to these refinements, a compact design of the fuel injection system in the region of the high-pressure pump is possible, in that all corresponding lines in the high-pressure pump open into the return line, which is then connected in a suitable manner to the tank via an external line connection.
  • a flow rate-dependent filling pressure is applied, for example, high filling pressures at high filling requirements and low filling pressures, if only small amounts of fuel must be transported, set.
  • the throttle can also take over the function of a zero feed throttle.
  • the greedströmdrossel can additionally take over the spring chamber damping throttle.
  • the single figure shows a schematic representation of the interaction of the essential components of a fuel injection system according to the invention.
  • a pre-pressure pump 1 is from a tank 2 fuel via a filter device in a
  • the high-pressure pump 5 has a pump housing, in which a pump camshaft is rotatably mounted in bearings 4a, 4b.
  • the bearing points 4a, 4b are fuel-lubricated and via Lagerschmierstoffab2020 Gustaven 6a, 6b of the exiting at the bearing points 4a, 4b from the pump interior 3 fuel in a return line 7, which opens into the tank 2, discharged.
  • the pump camshaft moves via a roller tappet a pump piston 8 at a rotational movement of the pump cam shaft translationally up and down.
  • the pump piston 8 cooperates with a pump working chamber 9, which can be connected to the pump interior 3 via a metering unit 10.
  • the amount of fuel to be supplied to the pump working chamber 9 is arbitrarily adjustable, for example, as a function of a pressure in a high-pressure accumulator.
  • the fuel introduced into the pump working chamber is conveyed via a high-pressure line 11 into the high-pressure accumulator. A necessary for this promotion
  • Suction valve for the introduced into the working space 9 fuel and a check valve to shut off the high-pressure line 1 1 are inserted directly into a pump cylinder head 12 of the high-pressure pump 5.
  • the switched from the metering unit hydraulic space represented by a
  • Connecting line 13 to the pump working chamber 9) is connected via a line connection 14 with a spring chamber of a spill valve 16 directly or indirectly.
  • the overflow valve 16 has a valve housing 17, in which a valve piston 18 can be adjusted against the force of a valve spring 19.
  • a valve control chamber 20 is also connected to the pump interior 3 (or the supply line to the metering unit 10) by switching on a filter. With increasing fuel pressure in the pump interior 3 by a closed metering unit 10, the valve piston 18 is moved in the direction of the spring chamber 15 and releases a discharge opening, which is connected to a discharge line 21, which also opens into the return line 7.
  • this diversion line 21 for example, at a set zero delivery rate, the fuel conveyed by the admission pressure pump 1 and not required for bearing lubrication is deactivated.
  • the hydraulic space (connecting line 13) connected by the metering unit 10 is connected to the spring chamber 15 via a line connection 14.
  • a throttle 22 is turned on in the line connection 14.
  • the spring chamber 15 is connected to the return line 7, wherein in the return line 7 a return flow restrictor 23 is inserted near the spring. If the line connection 14 - as shown - connected via the return line 7 to the spring chamber 15, the remindströmdrossel 23 is arranged in each case downstream of the injection point.
  • the throttle diameter of the throttle 22 is greater than the throttle diameter of the remindströmdrossel 23, so that when the metering unit 10 is open, the pressure in the spring chamber 15 increases, while the pressure in the spring chamber 15 is continuously degraded with closed metering unit 10 to the pressure in the return line 7.
  • the throttle 22 and the remindströmdrossel 23 filters may be upstream in particular gap filter.

Landscapes

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

Abstract

L'invention concerne un système d'injection de carburant d'un moteur à combustion interne, comprenant un réservoir (2) qui est relié à un espace intérieur (3) d'une pompe haute pression (5) par l'intermédiaire d'une pompe de pression préalable (1 ), ledit espace interne (3) étant relié à un espace de travail (9) de la pompe (5) par l'intermédiaire d'une unité de dosage (10); et ledit espace interne (3) étant en liaison hydraulique avec une conduite de débit de retour (7) par l'intermédiaire d'une soupape de trop-plein (16) qui présente un carter de soupape (17), un piston de soupape (18) et un ressort de soupape (19) disposé dans une chambre de ressorts (15). L'invention est caractérisée en ce que la chambre de ressorts (15) est reliée par l'intermédiaire d'un circuit d'étranglement à l'espace hydraulique qui est couplé par l'unité de dosage (10). L'invention propose un système d'injection de carburant dont la pression de remplissage d'un espace de travail (9) de la pompe (5) peut être réglée en fonction du débit d'injection. A cet effet, la chambre de ressorts (15) est reliée, par l'intermédiaire d'un circuit d'étranglement, à l'espace hydraulique qui est couplé par l'unité de dosage (10).
PCT/EP2011/066401 2010-11-05 2011-09-21 Système d'injection de carburant d'un moteur à combustion interne Ceased WO2012059267A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP11757896.3A EP2635791B1 (fr) 2010-11-05 2011-09-21 Système d'injection de carburant d'un moteur à combustion interne
KR1020137011510A KR101900965B1 (ko) 2010-11-05 2011-09-21 내연 기관의 연료 분사 시스템
RU2013125689/06A RU2573068C2 (ru) 2010-11-05 2011-09-21 Система вспрыскивания топлива в двигатель внутреннего сгорания
CN201180052758.4A CN103201495B (zh) 2010-11-05 2011-09-21 内燃机的燃料喷射系统
JP2013537051A JP5727617B2 (ja) 2010-11-05 2011-09-21 内燃機関の燃料噴射システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010043439A DE102010043439A1 (de) 2010-11-05 2010-11-05 Kraftstoffeinspritzsystem einer Brennkraftmaschine
DE102010043439.6 2010-11-05

Publications (1)

Publication Number Publication Date
WO2012059267A1 true WO2012059267A1 (fr) 2012-05-10

Family

ID=44653344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/066401 Ceased WO2012059267A1 (fr) 2010-11-05 2011-09-21 Système d'injection de carburant d'un moteur à combustion interne

Country Status (7)

Country Link
EP (1) EP2635791B1 (fr)
JP (1) JP5727617B2 (fr)
KR (1) KR101900965B1 (fr)
CN (1) CN103201495B (fr)
DE (1) DE102010043439A1 (fr)
RU (1) RU2573068C2 (fr)
WO (1) WO2012059267A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9422898B2 (en) 2013-02-12 2016-08-23 Ford Global Technologies, Llc Direct injection fuel pump
US9429124B2 (en) 2013-02-12 2016-08-30 Ford Global Technologies, Llc Direct injection fuel pump
US9599082B2 (en) 2013-02-12 2017-03-21 Ford Global Technologies, Llc Direct injection fuel pump
US9683512B2 (en) 2014-05-23 2017-06-20 Ford Global Technologies, Llc Pressure device to reduce ticking noise during engine idling

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013212145A1 (de) * 2013-06-25 2015-01-08 Robert Bosch Gmbh Pumpe
DE102013226649A1 (de) 2013-12-19 2015-06-25 Robert Bosch Gmbh Kraftstoffversorgungseinrichtung eines Kraftstoffeinspritzsystems einer Brennkraftmaschine sowie Überströmventil dazu
DE102014223240A1 (de) * 2014-11-14 2016-05-19 Robert Bosch Gmbh Niederdruckregelsystem einer Kraftstofffördereinrichtung eines Kraftstoffeinspritzsystems sowie ein Absteuerventil dazu
DE102014223788A1 (de) * 2014-11-21 2016-05-25 Robert Bosch Gmbh Drucksteuereinrichtung insbesondere für eine ein Fluid fördernde Hochdruckpumpe
DE102018211338A1 (de) * 2018-07-10 2020-01-16 Robert Bosch Gmbh Kraftstofffördereinrichtung für kryogene Kraftstoffe und Verfahren zum Betreiben einer Kraftstofffördereinrichtung
CN116412051B (zh) * 2023-04-17 2025-03-11 中国舰船研究设计中心 一种柴油机机带燃油泵出口压力波动消除系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002055873A1 (fr) * 2001-01-10 2002-07-18 Robert Bosch Gmbh Systeme d'injection de carburant avec regulation de la pression dans la conduite de retour
EP1712775A1 (fr) * 2004-02-06 2006-10-18 Bosch Corporation Dispositif d'alimentation en carburant
WO2007144227A1 (fr) * 2006-06-14 2007-12-21 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
DE102008042089A1 (de) 2008-09-15 2010-03-18 Robert Bosch Gmbh Überströmventil für die Zuleitung des Zumessventils der Einspritzpumpe einer Verbrennungskraftmaschine
WO2011048827A1 (fr) * 2009-10-23 2011-04-28 ボッシュ株式会社 Dispositif de commande pour moteur à combustion interne

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2071572C1 (ru) * 1992-10-15 1997-01-10 Ефим Яковлевич Мошинский Топливный насос высокого давления
DE19846157A1 (de) * 1998-10-07 2000-04-13 Bosch Gmbh Robert Pumpenanordnung zur Kraftstoffhochdruckerzeugung
JP3709755B2 (ja) * 1999-12-08 2005-10-26 日産自動車株式会社 内燃機関の燃料供給装置
RU2241850C2 (ru) * 2002-12-31 2004-12-10 Мошинский Ефим Яковлевич Топливная система
DE102005033638A1 (de) * 2005-07-19 2007-01-25 Robert Bosch Gmbh Kraftstoff-Fördereinrichtung, insbesondere für eine Brennkraftmaschine
DE102007052665A1 (de) * 2007-11-05 2009-05-07 Robert Bosch Gmbh Kraftstoffüberströmventil für eine Kraftstoffeinspritzeinrichtung und Kraftstoffeinspritzeinrichtung mit Kraftstoffüberströmventil
US20090211556A1 (en) * 2008-02-25 2009-08-27 Perkins Engines Company Limited System for maintaining a pump inlet pressure
DE102009001563A1 (de) * 2009-03-16 2010-09-23 Robert Bosch Gmbh Hochdruckpumpe
JP5464649B2 (ja) * 2009-09-07 2014-04-09 ボッシュ株式会社 内燃機関の制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002055873A1 (fr) * 2001-01-10 2002-07-18 Robert Bosch Gmbh Systeme d'injection de carburant avec regulation de la pression dans la conduite de retour
EP1712775A1 (fr) * 2004-02-06 2006-10-18 Bosch Corporation Dispositif d'alimentation en carburant
WO2007144227A1 (fr) * 2006-06-14 2007-12-21 Robert Bosch Gmbh Dispositif d'injection de carburant pour un moteur à combustion interne
DE102008042089A1 (de) 2008-09-15 2010-03-18 Robert Bosch Gmbh Überströmventil für die Zuleitung des Zumessventils der Einspritzpumpe einer Verbrennungskraftmaschine
WO2011048827A1 (fr) * 2009-10-23 2011-04-28 ボッシュ株式会社 Dispositif de commande pour moteur à combustion interne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9422898B2 (en) 2013-02-12 2016-08-23 Ford Global Technologies, Llc Direct injection fuel pump
US9429124B2 (en) 2013-02-12 2016-08-30 Ford Global Technologies, Llc Direct injection fuel pump
US9599082B2 (en) 2013-02-12 2017-03-21 Ford Global Technologies, Llc Direct injection fuel pump
US10006426B2 (en) 2013-02-12 2018-06-26 Ford Global Technologies, Llc Direct injection fuel pump
US9683512B2 (en) 2014-05-23 2017-06-20 Ford Global Technologies, Llc Pressure device to reduce ticking noise during engine idling

Also Published As

Publication number Publication date
RU2573068C2 (ru) 2016-01-20
KR101900965B1 (ko) 2018-09-20
KR20130126906A (ko) 2013-11-21
EP2635791A1 (fr) 2013-09-11
CN103201495B (zh) 2016-08-17
JP5727617B2 (ja) 2015-06-03
RU2013125689A (ru) 2014-12-10
JP2013545015A (ja) 2013-12-19
EP2635791B1 (fr) 2015-01-07
DE102010043439A1 (de) 2012-05-10
CN103201495A (zh) 2013-07-10

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