EP0304741A1 - Pompe en ligne pour systèmes d'injection de combustible à injecteurs commandés pour moteurs à combustion interne - Google Patents

Pompe en ligne pour systèmes d'injection de combustible à injecteurs commandés pour moteurs à combustion interne Download PDF

Info

Publication number
EP0304741A1
EP0304741A1 EP88113139A EP88113139A EP0304741A1 EP 0304741 A1 EP0304741 A1 EP 0304741A1 EP 88113139 A EP88113139 A EP 88113139A EP 88113139 A EP88113139 A EP 88113139A EP 0304741 A1 EP0304741 A1 EP 0304741A1
Authority
EP
European Patent Office
Prior art keywords
pump
engines
fuel injection
injection systems
controlled injectors
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Withdrawn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
EP88113139A
Other languages
German (de)
English (en)
Inventor
Renato Filippi
Sergio Turchi
Mario Sfarzetta
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.)
Weber SRL
Original Assignee
Weber 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 Weber SRL filed Critical Weber SRL
Publication of EP0304741A1 publication Critical patent/EP0304741A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
    • F04B11/0066—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control with special shape of the actuating element
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M59/38—Pumps characterised by adaptations to special uses or conditions

Definitions

  • the present invention relates in general to in­jection pumps for fuel injection systems for i.c. engines for motor vehicles, particularly diesel engines.
  • the invention relates to an in-line injection pump for injection systems with con­trolled injectors, of the type comprising a body con­taining one or more in-line cylinder-and-piston pumping units driven by a shaft with eccentrics connected through respective intake and delivery valves to inlet and outlet means for the fuel.
  • the object of the present invention is to provide a pump of the type specified above, having a simpler and cheaper construction than conventional pumps of this type, with a modular structure adapted to pump high-­pressure fuel at a constant rate of flow without the need of an external accumulator.
  • this object is achieved by virtue of the fact that the pump includes two pumping units and the cams of the drive shaft have a double-­lobed profile with constant accelerations, and in particular null in the delivery phase.
  • an in-line in­jection pump for fuel injection systems for diesel engines with electrically controlled injectors is generally indicated 1.
  • the pump 1 comprises essentially a base 2 which is normally of aluminium and is provided at one end with a substantially triangular attachment flange 3, and a head 4, normally of steel, which is separate from the base 2 and is fixed to its top by means of screws 5.
  • each in-line pumping unit 6 includes, in generally known manner, a tappet 7 driven by a cam-shaft 8 for driving a piston 9.
  • Each piston 9 is reciprocable within a respective cylinder 10 formed in an insert 11 carried by the head 4 and extending into an upper zone of the base 2.
  • Each tappet 7 cooperates operatively with a respective cam 12 of the shaft 8 which, as illustrated in greater detail in Figure 2, has a double-lobed profile.
  • Each cylinder 10 is associated with an intake valve 13 and a delivery valve 14 of generally known type.
  • the two intake valves 13 are connected to a com­mon passage 15 formed in the head 4 and communicating with an inlet connector 16 fitted to one side thereof, whilst the two delivery valves 14 are connected to a common passage 17 parallel to the passage 15 and com­ municating with a delivery connector 18 carried by the opposite side of the head 4.
  • the high-pressure side of the pump is located entirely with­in the head 4, with an obvious rationalisation and simplification of the construction of the pump.
  • Figure 4 illustrates several functional graphs of the pump according to the invention, resulting from the particular profile of the cams 12 which are designed so as to achieve constant accelerations with trapezoidal-­asymmetric-type changes in the velocity of the pistons 9. Suitable staggering of the cams 12 gives a low-pres­sure ripple at the outlet, with minimised dead volumes, since the overlapping of delivery of the pumping units allows accomplishment of constant flow rate over the 360° of rotation of the pump.
  • the graphs of Figure 4 relate in particular to the pump according to the invention, which is dimen­sioned as follows: - total swept volume: 0.4 - 0.6 cm3 /revolution - maximum velocity: 2800 revolutions per minute - base radius of the cams 12: 14.5mm - roll radius of the tappet 7: 8.5mm - maximum rise: 6 mm.
  • the three graphs of Figure 4 show, in dependence on the angular position of the cams 12, the rise, the velocity and the acceleration of the pistons 9, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
EP88113139A 1987-08-25 1988-08-12 Pompe en ligne pour systèmes d'injection de combustible à injecteurs commandés pour moteurs à combustion interne Withdrawn EP0304741A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT67732/87A IT1217254B (it) 1987-08-25 1987-08-25 Pompa in linea per impianti di iniezione del combustibile con iniettori comandati per motori a ciclo diesel
IT6773287 1987-08-25

Publications (1)

Publication Number Publication Date
EP0304741A1 true EP0304741A1 (fr) 1989-03-01

Family

ID=11304859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113139A Withdrawn EP0304741A1 (fr) 1987-08-25 1988-08-12 Pompe en ligne pour systèmes d'injection de combustible à injecteurs commandés pour moteurs à combustion interne

Country Status (4)

Country Link
EP (1) EP0304741A1 (fr)
JP (1) JPH01267356A (fr)
BR (1) BR8804303A (fr)
IT (1) IT1217254B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453227A1 (fr) * 1990-04-20 1991-10-23 Zexel Corporation Pompe d'injection de combustible
EP0629777A1 (fr) * 1993-06-18 1994-12-21 Yamaha Hatsudoki Kabushiki Kaisha Système d'injection de combustible
WO1999037910A1 (fr) * 1998-01-23 1999-07-29 Robert Bosch Gmbh Systeme de pompes pour alimentation en carburant sous haute pression
EP0856661A3 (fr) * 1997-01-30 2000-01-26 Lucas Industries Limited Pompe de carburant
EP1072787A2 (fr) † 1999-07-28 2001-01-31 Toyota Jidosha Kabushiki Kaisha Pompe à carburant à haute pression et came pour pompe à carburant à haute pression
EP1270929A1 (fr) * 2000-03-14 2003-01-02 Bosch Automotive Systems Corporation Pompe a combustible et dispositif d'alimentation en combustible utilisant cette pompe
EP1655480A1 (fr) * 2004-11-04 2006-05-10 Robert Bosch Gmbh Procédé pour utiliser un système de carburant d'un moteur à combustion interne et systéme de carburant
JP2017529487A (ja) * 2014-10-09 2017-10-05 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 燃料、好ましくはディーゼル油を内燃機関に供給するためのポンプユニット
DE102017102589A1 (de) 2017-02-09 2018-08-09 Volkswagen Ag Verbrennungsmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB365061A (en) * 1930-10-11 1932-01-11 Superior Engine Company Inc Improvements in or relating to fuel pumps
US2440194A (en) * 1946-01-29 1948-04-20 Texas Co Fuel pump
US2845875A (en) * 1956-03-29 1958-08-05 Thomas H Corbett Pumps
DE1297479B (de) * 1968-02-28 1969-06-12 Brueckner Alfred Zylinderkopf einer Hochdruckkolbenpumpe fuer Fluessigkeiten

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB365061A (en) * 1930-10-11 1932-01-11 Superior Engine Company Inc Improvements in or relating to fuel pumps
US2440194A (en) * 1946-01-29 1948-04-20 Texas Co Fuel pump
US2845875A (en) * 1956-03-29 1958-08-05 Thomas H Corbett Pumps
DE1297479B (de) * 1968-02-28 1969-06-12 Brueckner Alfred Zylinderkopf einer Hochdruckkolbenpumpe fuer Fluessigkeiten

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
V.A. VANSCHEIDT: "Design and strength calculations of marine diesel engines", 1969, pages 365-370, Soudostroenie, Leningrad, SU *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453227A1 (fr) * 1990-04-20 1991-10-23 Zexel Corporation Pompe d'injection de combustible
US5165851A (en) * 1990-04-20 1992-11-24 Zexel Corporation Fuel injection pump
EP0629777A1 (fr) * 1993-06-18 1994-12-21 Yamaha Hatsudoki Kabushiki Kaisha Système d'injection de combustible
US5511956A (en) * 1993-06-18 1996-04-30 Yamaha Hatsudoki Kabushiki Kaisha High pressure fuel pump for internal combustion engine
EP0856661A3 (fr) * 1997-01-30 2000-01-26 Lucas Industries Limited Pompe de carburant
WO1999037910A1 (fr) * 1998-01-23 1999-07-29 Robert Bosch Gmbh Systeme de pompes pour alimentation en carburant sous haute pression
EP1072787A2 (fr) † 1999-07-28 2001-01-31 Toyota Jidosha Kabushiki Kaisha Pompe à carburant à haute pression et came pour pompe à carburant à haute pression
EP1072787B2 (fr) † 1999-07-28 2010-02-24 Toyota Jidosha Kabushiki Kaisha Pompe à carburant à haute pression et came pour pompe à carburant à haute pression
EP1270929A1 (fr) * 2000-03-14 2003-01-02 Bosch Automotive Systems Corporation Pompe a combustible et dispositif d'alimentation en combustible utilisant cette pompe
EP1270929A4 (fr) * 2000-03-14 2004-08-18 Bosch Automotive Systems Corp Pompe a combustible et dispositif d'alimentation en combustible utilisant cette pompe
EP1655480A1 (fr) * 2004-11-04 2006-05-10 Robert Bosch Gmbh Procédé pour utiliser un système de carburant d'un moteur à combustion interne et systéme de carburant
JP2017529487A (ja) * 2014-10-09 2017-10-05 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 燃料、好ましくはディーゼル油を内燃機関に供給するためのポンプユニット
US10107244B2 (en) 2014-10-09 2018-10-23 Robert Bosch Gmbh Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine
DE102017102589A1 (de) 2017-02-09 2018-08-09 Volkswagen Ag Verbrennungsmotor
DE102017102589B4 (de) 2017-02-09 2021-08-19 Volkswagen Ag Verbrennungsmotor

Also Published As

Publication number Publication date
JPH01267356A (ja) 1989-10-25
BR8804303A (pt) 1989-03-21
IT8767732A0 (it) 1987-08-25
IT1217254B (it) 1990-03-22

Similar Documents

Publication Publication Date Title
EP1072787B2 (fr) Pompe à carburant à haute pression et came pour pompe à carburant à haute pression
EP0914553B1 (fr) Pompe de fluides avec soupape a commande par solenoide integree pour derivation
EP0629777B1 (fr) Système d'injection de combustible
US6763808B2 (en) Fuel pump and fuel feeding device using the fuel pump
EP0304741A1 (fr) Pompe en ligne pour systèmes d'injection de combustible à injecteurs commandés pour moteurs à combustion interne
US8136508B2 (en) Selective displacement control of multi-plunger fuel pump
EP1557555B1 (fr) Dispositif d'alimentation de carburant d'un moteur à combustion interne
US7178509B2 (en) High-pressure pump, in particular for a fuel injection system of an internal combustion engine
JP2003314394A (ja) 内燃機関に用いられる燃料噴射装置
US20080109152A1 (en) Selective displacement control of multi-plunger fuel pump
JP2690734B2 (ja) 可変吐出量高圧ポンプ
US4928656A (en) Fuel-injection pump with variable cylinder capacity for diesel engine injection systems
US20080115770A1 (en) Pump with torque reversal avoidance feature and engine system using same
US6817841B2 (en) High-pressure fuel pump for internal combustion engine with improved partial-load performance
CA2358444A1 (fr) Moteur a deux temps
JP2001511869A (ja) 内燃機関の燃料噴射系における燃料供給用の高圧ポンプ
GB2218161A (en) A fuel injection pump for an internal combustion engine, having pre-injection and main injection
US6807951B2 (en) High-pressure fuel pump with integrated blocking-vane prefeed pump
US6843641B1 (en) Radial piston pump
CN101205859A (zh) 控制按需燃油泵的方法
US5784948A (en) Positive displacement pump having levitating magnetic piston spring circuit
EP1685325B1 (fr) Pompe a carburant avec plusieurs cames
JP2965032B1 (ja) 内燃機関の燃料ポンプ
EP1555432B1 (fr) Pompe hydraulique
GB1440818A (en) Fuel injection pumps

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

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19890727

17Q First examination report despatched

Effective date: 19900410

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900821