EP1339968B1 - Magnetventilgesteuerte kraftstoffeinspritzpumpe für brennkraftmaschinen, insbesondere dieselmotoren - Google Patents

Magnetventilgesteuerte kraftstoffeinspritzpumpe für brennkraftmaschinen, insbesondere dieselmotoren Download PDF

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Publication number
EP1339968B1
EP1339968B1 EP01997636A EP01997636A EP1339968B1 EP 1339968 B1 EP1339968 B1 EP 1339968B1 EP 01997636 A EP01997636 A EP 01997636A EP 01997636 A EP01997636 A EP 01997636A EP 1339968 B1 EP1339968 B1 EP 1339968B1
Authority
EP
European Patent Office
Prior art keywords
low
pressure
solenoid
piston
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.)
Expired - Lifetime
Application number
EP01997636A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1339968A1 (de
Inventor
Peter Boehland
Andreas Sterr
Andreas Dutt
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 EP1339968A1 publication Critical patent/EP1339968A1/de
Application granted granted Critical
Publication of EP1339968B1 publication Critical patent/EP1339968B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
    • F02M41/1405—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
    • F02M41/1411—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection 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
    • F02M59/36—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

Definitions

  • the invention relates to a solenoid valve controlled fuel injection pump according to the preamble of claim 1.
  • those fuel injection pumps of the invention are relevant according to the invention Distributor type, in which a so-called I-solenoid valve is used.
  • These Valve design is characterized by the fact that the flow during Abêtn radially directed from the outside inwards. Due to the flow deflection in the low pressure range an opening (positive) force is achieved. The force shortens the valve opening times.
  • a basic characteristic of the type of valve in question can be seen in that is a very large low pressure area compared to the pressure step area in the high pressure region of the solenoid valve results. Therefore, even at low Pressure fluctuations in the low pressure range relatively large forces. These forces cause opening time variations that lead to injection quantity spreads (from hub to hub). To the forces mentioned - at least partly - to compensate and thus their adverse effects largely To avoid, in the valve type in question is a low-pressure compensating piston provided, which cooperates with the solenoid valve.
  • the low pressure compensation piston So has the function of a stable opening behavior of Solenoid valve to effect.
  • the object of the present invention is to take appropriate measures that undesirable delays in the opening process of the solenoid valve avoided become.
  • US-A-5,318,001 discloses a solenoid valve controlled fuel injection pump known wherein the injection duration via the opening of the solenoid valve is controlled.
  • the solenoid valve has a valve needle, via a valve seat in the pump body a High pressure area separates from a low pressure area or combines. When separating is in a pressure regulator or Pressure relief valve designated membrane group Storage volume formed when fueling nachschiebt and thus supports the intake process or accelerated.
  • the invention is illustrated in the drawing with reference to an embodiment, which will be described in detail below.
  • the drawing shows - in vertical longitudinal section and partially - an embodiment of a fuel injection pump the distributor type.
  • a (not shown) pump working chamber is connected via a pressure channel 11 in Distributor 10 is connected to a distributor groove 12 on the circumference of the distributor 10, from the (not shown) extending in the pump housing injection lines take their exit.
  • the injection lines in turn lead to a (also not shown) injection valve.
  • a Connecting channel 14 which opens into an annular groove 15.
  • the annular groove 15 forms a valve seat 16 for a valve needle 17 of a (partially shown) total designated 18 solenoid valve.
  • a valve needle 17 of a (partially shown) total designated 18 solenoid valve Above the solenoid valve needle 17, at 19, an electromagnet which actuates the solenoid valve 18 follows, The well-known prior art is why a detailed account omitted can.
  • valve seat 16 Below the valve seat 16 extends a total of 20 numbered Blind hole bore, which has an extension 21, of which a (further) Connecting channel 22 takes its output.
  • the connecting channel 22 leads to the (not shown) low-pressure part of the fuel injection pump. Consequently define valve seat 16 and solenoid valve needle 17 within the manifold 10 a high pressure area 14, 15 and a low pressure area 21.
  • a low pressure balancing piston arranged axially movable, the - respectively half - left side of a common longitudinal central axis 23 of solenoid valve needle 17 and low pressure balancing pistons in total with 24 and right side the longitudinal central axis 23 is numbered 25 in total.
  • the right side drawn by the longitudinal center axis 23 type 25th the low pressure balance piston marks the current state of Technique, wherein the low pressure balancing piston 25 - at 26 - in one piece is connected to the solenoid valve needle 17.
  • the left side of the longitudinal central axis 23 illustrated low-pressure compensating piston 24 to the invention Design type.
  • the special feature here is that solenoid valve needle 17 and low pressure balancing piston 24 as two separate and thus independently (axially) movable components are formed.
  • to Guide the low-pressure compensating piston 24 has this a piston rod 27 tapered diameter, in one in the solenoid valve needle 17 introduced guide bore 28 engages. Through the guide 27/28 becomes an (otherwise possible) tilting of the low pressure balance piston 24 effectively avoided.
  • the guide bore 28 is a blind hole formed, with its (upper) end 29 acts as a stop, with the free end 30 of the piston rod 27 of the low-pressure compensation piston 24th interacts.
  • a compression spring (low pressure compensation spring) 32 at the rear is supported on the 33 numbered bottom of the blind hole 20.
  • the low-pressure compensation spring 32 of the low-pressure compensating piston 24 pressed against the (upper) stop 29 of the guide bore 28.
  • Another special feature is that at the (lower) end face 31 the low-pressure balance piston 24 a rod-shaped, from the low-pressure compensation spring 32 surrounded counterstop 34 is arranged the at the end of 35 with the same time as (lower) stroke stop for the Low-pressure balancing piston 24 acting bottom 33 of the blind hole 20 cooperates.
  • the rod-shaped counter-stop 34 is used at the same time to protect the low-pressure compensation spring 32nd
  • the described arrangement and design of the low pressure balance piston 24 affects the operation of the fuel injection pump as follows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
EP01997636A 2000-11-23 2001-11-16 Magnetventilgesteuerte kraftstoffeinspritzpumpe für brennkraftmaschinen, insbesondere dieselmotoren Expired - Lifetime EP1339968B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10058011A DE10058011A1 (de) 2000-11-23 2000-11-23 Magnetventilgesteuerte Kraftstoffeinspritzpumpe für Brennkraftmaschinen, insbesondere Dieselmotoren
DE10058011 2000-11-23
PCT/DE2001/004319 WO2002042634A1 (de) 2000-11-23 2001-11-16 Magnetventilgesteuerte kraftstoffeinspritzpumpe für brennkraftmaschinen, insbesondere dieselmotoren

Publications (2)

Publication Number Publication Date
EP1339968A1 EP1339968A1 (de) 2003-09-03
EP1339968B1 true EP1339968B1 (de) 2005-06-22

Family

ID=7664285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01997636A Expired - Lifetime EP1339968B1 (de) 2000-11-23 2001-11-16 Magnetventilgesteuerte kraftstoffeinspritzpumpe für brennkraftmaschinen, insbesondere dieselmotoren

Country Status (6)

Country Link
US (1) US6884041B2 (ja)
EP (1) EP1339968B1 (ja)
JP (1) JP2004514824A (ja)
DE (2) DE10058011A1 (ja)
ES (1) ES2243599T3 (ja)
WO (1) WO2002042634A1 (ja)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215449A (en) * 1991-12-05 1993-06-01 Stanadyne Automotive Corp. Distributor type fuel injection pump
DE4323683A1 (de) * 1993-07-15 1995-01-19 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
DE4339948A1 (de) * 1993-11-24 1995-06-01 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
US5954487A (en) * 1995-06-23 1999-09-21 Diesel Technology Company Fuel pump control valve assembly
DE19616084A1 (de) 1996-04-23 1997-10-30 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung
DE19717494A1 (de) * 1997-04-25 1998-10-29 Bosch Gmbh Robert Kraftstoffeinspritzpumpe der Verteilerbauart

Also Published As

Publication number Publication date
WO2002042634A1 (de) 2002-05-30
JP2004514824A (ja) 2004-05-20
DE10058011A1 (de) 2002-05-29
US20040131486A1 (en) 2004-07-08
DE50106595D1 (de) 2005-07-28
US6884041B2 (en) 2005-04-26
ES2243599T3 (es) 2005-12-01
EP1339968A1 (de) 2003-09-03

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