EP1302632A1 - Kraftstoffversorgungseinrichtung für Einspritzbrennkraftmaschine - Google Patents

Kraftstoffversorgungseinrichtung für Einspritzbrennkraftmaschine Download PDF

Info

Publication number
EP1302632A1
EP1302632A1 EP02022896A EP02022896A EP1302632A1 EP 1302632 A1 EP1302632 A1 EP 1302632A1 EP 02022896 A EP02022896 A EP 02022896A EP 02022896 A EP02022896 A EP 02022896A EP 1302632 A1 EP1302632 A1 EP 1302632A1
Authority
EP
European Patent Office
Prior art keywords
fuel
supply system
engine
outlet
fuel supply
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
EP02022896A
Other languages
English (en)
French (fr)
Other versions
EP1302632B1 (de
Inventor
Gianni Borghi
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.)
Lombardini SRL
Original Assignee
Lombardini SRL
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 Lombardini SRL filed Critical Lombardini SRL
Publication of EP1302632A1 publication Critical patent/EP1302632A1/de
Application granted granted Critical
Publication of EP1302632B1 publication Critical patent/EP1302632B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure
    • F01M1/22—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure
    • F01M1/24—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure acting on engine fuel system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M11/12—Indicating devices; Other safety devices concerning lubricant level

Definitions

  • the present invention relates to an injection engine fuel supply system.
  • the present invention may be used to advantage, though not exclusively, in hand-start injection engines with no electric system, such as the type used in agricultural or industrial machines in general, to which the following description refers purely by way of example.
  • One solution to the problem adopted in other types of injection engines, e.g. automotive engines, is to indicate - typically by means of an indicator light - when the oil level falls below a minimum value, on the basis of an electric signal supplied by an oil level or oil pressure sensor in the oil sump.
  • an injection engine supply system as defined in Claim 1.
  • Numeral 1 in Figure 1 indicates as a whole a fuel supply system for an injection engine 2, in particular a one-cylinder diesel engine (shown schematically).
  • Fuel supply system 1 substantially comprises a fuel tank 3; a fuel injector 4; a one-way-flow injection pump 5 connected to fuel tank 3 by an intake line 6, and to fuel injector 4 by a delivery line 7; and a fuel filter 8 along intake line 6.
  • fuel filter 8 is a cartridge type, and comprises a fuel inlet 8a connected to the bottom of fuel tank 3; an air inlet 8b; an outlet 8c connected to the inlet 5a of injection pump 5; and a vent outlet 8d connected to the top of fuel tank 3 by a vent conduit 9 to feed any air in fuel filter 8 back into the tank.
  • Injection pump 5 also comprises an outlet 5b connected to fuel injector 4 by delivery line 7; and a recirculating outlet 5c connected to fuel tank 3 by a recirculating conduit 10 connected to vent conduit 9.
  • injection pump 5 conveniently has a high intake flow, much higher than - preferably three times - the injection flow of fuel injector 4, and the surplus fuel drawn from fuel tank 3 is fed back into fuel tank 3 along recirculating conduit 10 and vent conduit 9.
  • Fuel injector 4 is connected to fuel tank 3 by a recirculating conduit 11, which feeds back into fuel tank 3 part of the fuel used in known manner by and for operation of fuel injector 4.
  • Fuel supply system 1 also comprises an engine cut-off device for turning off engine 2 when the lubricating oil level in the oil sump 17 falls below a desired minimum.
  • the engine cut-off device substantially comprises a pulse-operated pump 12 having an excitation chamber 13 and a pumping chamber 14 separated by a diaphragm 15 on which acts a contrast spring 16 housed in excitation chamber 13.
  • excitation chamber 13 has an excitation port 13a communicating with oil sump 17 of engine 2 along an excitation conduit 18, the outlet section 18a of which is located substantially at the minimum lubricating oil level (shown by the dash line); and excitation conduit 18 is so positioned that the incoming lubricating oil can flow back into oil sump 17.
  • Pumping chamber 14 has an inlet 14a communicating with the top of fuel tank 3 along an intake conduit 19 to draw in air from the tank; and an outlet 14b communicating with the air inlet 8b of fuel filter 8 along a delivery conduit 20.
  • Inlet 14a and outlet 14b of pulse-operated pump 12 have respective non-return valves 21 and 22 permitting one-way airflow from the top of fuel tank 3 to pumping chamber 14, and from pumping chamber 14 to fuel filter 8 respectively.
  • Fuel supply system 1 cuts off engine 2 by supplying air into fuel filter 8, which therefore supplies no fuel to injection pump 5 or, consequently, to fuel injector 4.
  • pulse-operated pump 12 operation of which is governed by the pressure pulses generated inside the block of engine 2 by movement of the piston.
  • outlet section 18a of excitation conduit 18 is located, outlet section 18a is no longer immersed in the lubricating oil, so that the pressure pulses generated by movement of the piston reach excitation chamber 13 of pulse-operated pump 12, which thus comes into operation to supply air from fuel tank 3 into fuel filter 8, which is consequently emptied of fuel.
  • the air in fuel filter 8 is fed by injection pump 5 to fuel injector 4 which, no longer supplying fuel to engine 2, rapidly cuts off the engine.
  • fuel filter 8 is emptied, and therefore engine 2 cut off, extremely quickly, by injection pump 5 drawing much more fuel than required by fuel injector 4, so that air is fed rapidly from fuel filter 8 to injection pump 5.
  • pulse-operated air pump 12 drawing air from fuel tank 3 as opposed to the outside, operation of the pump is unaffected by the difference in pressure between the inside of fuel tank 3 and the outside atmosphere, and any fuel leakage from pulse-operated air pump 12 does not leak to the outside.
  • Numeral 25 in Figure 2 indicates as a whole a fuel supply system according to a second embodiment of the present invention. Like numerals indicate corresponding parts already described with reference to Figure 1.
  • Fuel supply system 25 differs from fuel supply system 1 in that intake conduit 19, which supplies air to port 14a, is connected to an air suction duct 26 of engine 2, downstream from an air filter 27, rather than to fuel tank 3.
  • the present invention provides for acting on the engine in the event of poor lubrication without requiring an electric system or oil level or pressure sensors, and by simply adding a straightforward, low-cost, pulse-operated air pump.
  • the present invention also provides for fast cut-off and start-up of the engine, by the injection pump drawing large amounts of air and fuel from the fuel tank, so that air is fed and exhausted rapidly to and from the fuel filter. This is particularly important in the case of injection engines with no electric system, which, being hand-started, must permit fairly fast start-up.
  • the pulse-operated pump inlet may communicate directly with the outside as opposed to the top of the fuel tank or air suction duct; and the fuel filter may be other than as described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP02022896A 2001-10-16 2002-10-14 Kraftstoffversorgungseinrichtung für Einspritzbrennkraftmaschine Expired - Lifetime EP1302632B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001TO000980A ITTO20010980A1 (it) 2001-10-16 2001-10-16 Impianto di alimentazione del combustibile per un motore ad iniezione.
ITTO20010980 2001-10-16

Publications (2)

Publication Number Publication Date
EP1302632A1 true EP1302632A1 (de) 2003-04-16
EP1302632B1 EP1302632B1 (de) 2005-07-20

Family

ID=11459262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022896A Expired - Lifetime EP1302632B1 (de) 2001-10-16 2002-10-14 Kraftstoffversorgungseinrichtung für Einspritzbrennkraftmaschine

Country Status (5)

Country Link
EP (1) EP1302632B1 (de)
AT (1) ATE299988T1 (de)
DE (1) DE60205073T2 (de)
ES (1) ES2244710T3 (de)
IT (1) ITTO20010980A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110321A1 (de) * 2010-03-09 2011-09-15 Wacker Neuson Se Antriebssystem mit vorrichtung zur unterbrechung des betriebs bei drohendem betriebsstoffmangel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203408A (en) * 1978-11-15 1980-05-20 Honda Giken Kogyo Kabushiki Kaisha Lubricating oil detector for an internal combustion engine
US4622935A (en) * 1985-11-13 1986-11-18 Briggs & Stratton Corp. Low level lubricating oil detector
US4911121A (en) * 1989-01-27 1990-03-27 Barnes Richard W Engine protection device
DE4430816A1 (de) * 1993-08-30 1995-03-02 Honda Motor Co Ltd Dieselmaschinen-Abstellsystem
US5878710A (en) * 1998-07-20 1999-03-09 Caterpillar Inc. Fuel injection shutdown system
US6085716A (en) * 1996-08-05 2000-07-11 Motorenfabrik Hatz Gmbh & Co. Kg. Device for interrupting the fuel supply

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203408A (en) * 1978-11-15 1980-05-20 Honda Giken Kogyo Kabushiki Kaisha Lubricating oil detector for an internal combustion engine
US4622935A (en) * 1985-11-13 1986-11-18 Briggs & Stratton Corp. Low level lubricating oil detector
US4911121A (en) * 1989-01-27 1990-03-27 Barnes Richard W Engine protection device
DE4430816A1 (de) * 1993-08-30 1995-03-02 Honda Motor Co Ltd Dieselmaschinen-Abstellsystem
US6085716A (en) * 1996-08-05 2000-07-11 Motorenfabrik Hatz Gmbh & Co. Kg. Device for interrupting the fuel supply
US5878710A (en) * 1998-07-20 1999-03-09 Caterpillar Inc. Fuel injection shutdown system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011110321A1 (de) * 2010-03-09 2011-09-15 Wacker Neuson Se Antriebssystem mit vorrichtung zur unterbrechung des betriebs bei drohendem betriebsstoffmangel
CN102947556A (zh) * 2010-03-09 2013-02-27 威克纽森产品有限两合公司 具有在面临缺乏工作介质的情况下用于中断运行的设备的驱动系统

Also Published As

Publication number Publication date
ITTO20010980A1 (it) 2003-04-16
EP1302632B1 (de) 2005-07-20
ATE299988T1 (de) 2005-08-15
ES2244710T3 (es) 2005-12-16
DE60205073D1 (de) 2005-08-25
DE60205073T2 (de) 2006-03-30

Similar Documents

Publication Publication Date Title
US6488476B2 (en) Fuel feed unit
EP1784569B1 (de) Schiffsdampfabscheider mit umgehungsleitung
TW200643300A (en) Fuel supply device for a motor vehicle
JP5508526B2 (ja) 内燃機関のための燃料システム
JPH11280604A (ja) 内燃機関の燃料噴射機構における燃料供給のための高圧ポンプ
ATE299101T1 (de) Krafststofftank für kraftfahrzeug
US20030132063A1 (en) Internal combustion engine
EP1302632B1 (de) Kraftstoffversorgungseinrichtung für Einspritzbrennkraftmaschine
EP2521852A1 (de) Dampfabscheider mit intergrierter niederdrucksaugpumpe
WO2000025017A1 (en) Constant fuel-pump-inlet pressure system
JP2010223130A (ja) 燃料性状判別装置
JP2009209720A (ja) 車両用燃料供給装置
US9599127B2 (en) Hydraulic circuit supply system
JP2010090830A (ja) 車両用燃料供給装置
KR102068150B1 (ko) 릴리프밸브 및 이를 포함하는 오일펌프
JP2003214276A (ja) 燃料供給装置
JPH08303223A (ja) ２サイクルエンジンの潤滑装置
JP6972279B1 (ja) 燃料供給装置
JPWO2005040600A1 (ja) 燃料供給システム
WO2003056166A1 (en) A fuel supply system for an internal combustion engine
JPH0710055Y2 (ja) ディ−ゼル機関の燃料回路中のエア抜き装置
KR100376679B1 (ko) 오일 보충 시스템
JPH09112237A (ja) 補助潤滑油タンク付きエンジン
JPH0821224A (ja) エンジンの潤滑装置
JP2011220297A (ja) 燃料供給装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LOMBARDINI S.R.L. A SOCIO UNICO

17P Request for examination filed

Effective date: 20031015

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050720

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60205073

Country of ref document: DE

Date of ref document: 20050825

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051014

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051014

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051020

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051020

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051020

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051031

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2244710

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051221

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060421

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20210729

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20211102

Year of fee payment: 20

Ref country code: GB

Payment date: 20211027

Year of fee payment: 20

Ref country code: DE

Payment date: 20211027

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20211025

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60205073

Country of ref document: DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20221031

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20221013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20221013

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20221015