WO2009112308A1 - Pompe haute pression pour distribuer du carburant à un moteur à combustion interne - Google Patents

Pompe haute pression pour distribuer du carburant à un moteur à combustion interne Download PDF

Info

Publication number
WO2009112308A1
WO2009112308A1 PCT/EP2009/051073 EP2009051073W WO2009112308A1 WO 2009112308 A1 WO2009112308 A1 WO 2009112308A1 EP 2009051073 W EP2009051073 W EP 2009051073W WO 2009112308 A1 WO2009112308 A1 WO 2009112308A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
faces
chamber
flat
flat faces
Prior art date
Application number
PCT/EP2009/051073
Other languages
English (en)
Inventor
Benedetto Loiacono
Pasquale Cavallera
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 WO2009112308A1 publication Critical patent/WO2009112308A1/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
    • F02M59/02—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
    • F02M59/02—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
    • F02M59/04—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—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 special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement

Definitions

  • the present invention relates to a high-pressure pump for feeding fuel to an internal-combustion engine.
  • the present invention relates to a high-pressure pump which comprises a pump body, guided pumping members and a mechanism for actuating the pumping members so as to convert rotational movement into a reciprocating movement.
  • the actuating mechanism comprises a shaft rotating about a first axis, a cam arranged along the shaft and a polygonal ring which is mounted rotatably around the cam about a second axis parallel to the first axis, has a number of flat faces equal to the number of pumping members and is housed inside a chamber formed inside the pump body.
  • the chamber for housing the polygonal ring has a cross-section through the first axis with a circular form and a size greater than the sum of the two following values:
  • One of the objects of the present invention is to provide a high-pressure pump which on the one hand avoids any interference between the pump body and the polygonal ring and which at the same time allows a reduction in the dimensions of the high-pressure pump.
  • a high-pressure pump for feeding fuel to an internal-combustion engine
  • the high-pressure pump comprising a pump body, guided pumping members and a mechanism for actuating the pumping members so as to convert rotational movement into a reciprocating movement
  • the actuating mechanism comprising a shaft rotating about a first axis, a cam along the shaft and a polygonal ring which is mounted rotatably around the cam about a second axis parallel to the first axis, has a number of flat faces equal to the number of pumping members and is housed inside a chamber formed in the pump body
  • the high-pressure pump being characterized in that the chamber is delimited by further flat faces uniformly distributed around the first axis, parallel to the first axis, and equal to the number of pumping members.
  • the radial dimensions of the high- pressure pump may be reduced considerably, in particular the portion of the pump body which guides the pumping members may be moved closer to the first axis.
  • each further flat face is parallel to a respective flat face of the polygonal ring.
  • the pump body has seats for housing the pumping members.
  • each seat extends in a radial direction with respect to the first axis opposite a respective further flat face and perpendicularly with respect to a respective further flat face.
  • FIG. 2 is a cross-sectional view, on a large scale and with parts removed for the sake of clarity, of a second embodiment of the present invention.
  • the high-pressure pump 1 comprises a pump body 2, a chamber 3 designed to house an actuating mechanism 4 comprising a shaft 5 rotating about an axis Al.
  • the actuating mechanism 4 is designed to actuate three pumping members 6 which are designed to move with a reciprocating movement in the radial direction with respect to the axis Al.
  • the high-pressure pump 1 comprises three heads 7, each of which is assembled on the pump body 2.
  • the actuating mechanism 4 comprises, in addition to the shaft 5, a cam 8 with an axis A2 parallel to the axis Al and arranged along the shaft 5, and a polygonal ring 9 mounted rotatably around the cam 8 namely rotatably about the second axis A2.
  • the polygonal ring 9 is coupled to the cam 8 by means of a friction bearing 10 and comprises a cylindrical inner surface 11 and three flat faces 12 parallel to the first and the second axes Al and A2 and uniformly distributed around the axis A2.
  • the flat faces 12 are connected together by curved faces 13.
  • the flat faces 12 and the curved faces 13 define the characteristic cross-section substantially in the form of an equilateral triangle of the polygonal ring 9 for the high-pressure pumps with three radial pumping members. - A -
  • the example illustrated in the accompanying figure shows three pumping members 6 although the number of pumping members may be different from that shown and the polygonal ring may, consequently, assume forms different from that of an equilateral triangle.
  • Each pumping member 6 comprises a cup 14, a piston 15 and a spring 16.
  • the cup 14 comprises a bottom wall 17 and a cylindrical side wall 18 guided slidably by a respective seat 19 formed in the pump body 2.
  • the piston 15 comprises a base 20 and a cylindrical body 21 sliding inside a respective seat 22 formed in a respective head 7.
  • the seat 22 is concentric with a respective seat 19 and the spring 16 is arranged between the two seats 19 and 22, being compressed between the head 7 and the base of the piston 20 so as to keep the bottom wall 17 of the cup 14 in contact with a flat face 12 of the polygonal ring 8.
  • the chamber 3 has the function of housing the actuating mechanism 4 and, in particular, of housing the polygonal ring 9.
  • the chamber 3 has a cross-section through the axis Al substantially with the same form as the cross-section of the polygonal ring 9.
  • the chamber 3 is delimited by three flat faces 23 uniformly distributed around the axis Al and parallel to the axis Al.
  • the chamber 3 is also delimited by three curved faces 24 uniformly distributed around the axis Al and parallel to the axis Al. In this case, each curved face 24 connects two adjacent flat faces 23.
  • the seats 19 of the pump body 2 are formed opposite respective flat faces 23 and extend perpendicularly with respect to the respective flat faces 23.
  • the actuating mechanism 4 has the function of converting the rotational movement into a reciprocating movement: the shaft 5 and the cam 8 are rotated about the axis Al, while the polygonal ring 8 performs revolutions about the axis Al and a rotation about the axis A2.
  • the constraints imposed on the polygonal ring by the cups 14 which are pushed by the respective springs 16 ensure that the polygonal ring 9 remains parallel to itself during the revolution about the axis Al. Any friction between the cups 14 and the polygonal ring 9 and unaligned loads may cause slight oscillations of the polygonal ring 9 about the axis A2.
  • each flat face 12 of the polygonal ring 9 remains substantially parallel to a respective flat face 23 of the chamber 3 during the revolving movement about the axis Al of the polygonal ring 8.
  • each flat face 12 performs a cycle between a minimum distance from a respective flat face 23 and a maximum distance from the said flat face 23.
  • the chamber 3 has a cross-section which has substantially the same form as the cross-section of the polygonal ring 9, it is possible to reduce the radial dimensions of the entire high-pressure pump 1: essentially the form of the cross- section of the chamber is such that the seats 19 may be moved towards the axis Al by an amount equal to D, where D is the maximum distance in the radial direction between a flat face 23 of the chamber 3 and a hypothetical circular cylindrical face 25 suitable for housing the said polygonal ring 9 without interference.
  • Figure 1 are used to indicate similar components, except for the chamber 26 housing the actuating mechanism 4 and the polygonal ring 27.
  • the polygonal ring 27 has three flat faces 28 and three curved faces 29 which are situated in between and which alternate with the flat faces 28.
  • the chamber 26 has three flat faces 30 which are uniformly distributed about the axis Al and parallel to the axis Al.
  • the chamber 3 is also delimited by further flat faces 31 uniformly distributed around the axis Al and parallel to the axis Al.
  • Each flat face 31 is connected by a small-diameter curved face 32 to two adjacent faces 30.
  • the seats 19 of the pump body 2 are formed opposite respective flat faces 30 and extend perpendicularly with respect to the respective flat faces 30.
  • the chamber 26 has a cross-section which is similar to a hexagon.
  • the similarity of a hexagon is all the greater the more the curved faces 32 have a small diameter.
  • the flat faces 12, 30, 31 allow the formation of the respective chambers 3, 26 with dimensions smaller than the dimensions defined by the hypothetical circular surface 25 shown in Figure 1. Consequently, while maintaining the same thicknesses of the delicate parts of the pump body 2 it is possible to reduce the dimensions of the high- pressure pump.
  • the high-pressure pump 1 described here may be subject to modifications and variations without departing from the scope of the accompanying claims.
  • the number of pumping members may be different from that described with reference to the accompanying figure and, consequently, the form of the polygonal ring 9 and the chamber 3 may be different from that shown.

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 porte sur une pompe haute pression (1) pour distribuer du carburant à un moteur à combustion interne, laquelle pompe haute pression (1) comporte un corps de pompe (2), des éléments de pompage (6), un mécanisme (4) pour actionner les éléments de pompage (6), lequel mécanisme est doté de la fonction de conversion d'un mouvement de rotation en un mouvement de va-et-vient et d’un arbre (5) tournant autour d'un premier axe (A1), d’une came (8) agencée sur l'arbre (5) et d’une bague polygonale (9) qui est montée en rotation autour de la came (8) autour d'un second axe (A2) parallèle au premier axe (A1), comporte un certain nombre de faces plates (12) égal au nombre d'éléments de pompage (6) et est logé à l'intérieur d'une chambre (3) qui est formée dans le corps de pompe (2) et délimitée par d'autres faces plates (23) distribuées de façon uniforme autour du premier axe (A1), parallèles au premier axe (A1), et de manière égale au nombre d'éléments de pompage (6).
PCT/EP2009/051073 2008-03-13 2009-01-30 Pompe haute pression pour distribuer du carburant à un moteur à combustion interne WO2009112308A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2008A000431 2008-03-13
ITMI20080431 ITMI20080431A1 (it) 2008-03-13 2008-03-13 Pompa di alta pressione per alimentare combustibile a un motore a combustione interna

Publications (1)

Publication Number Publication Date
WO2009112308A1 true WO2009112308A1 (fr) 2009-09-17

Family

ID=40292890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/051073 WO2009112308A1 (fr) 2008-03-13 2009-01-30 Pompe haute pression pour distribuer du carburant à un moteur à combustion interne

Country Status (2)

Country Link
IT (1) ITMI20080431A1 (fr)
WO (1) WO2009112308A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036557A (en) * 1959-06-04 1962-05-29 Kimsey Eric George Hydraulic motors and pumps
NL7015670A (fr) * 1970-10-07 1972-04-11
DE19635164A1 (de) * 1996-08-30 1998-03-05 Bosch Gmbh Robert Kolbenpumpe
DE19906626A1 (de) * 1998-10-06 2000-04-13 Mannesmann Rexroth Ag Pumpenanordnung
US20020189438A1 (en) * 2001-06-19 2002-12-19 Katsunori Furuta Fuel injection pump
WO2005111405A1 (fr) * 2004-05-13 2005-11-24 Robert Bosch Gmbh Pompe haute pression destinee a un dispositif d'injection de carburant d'un moteur a combustion interne
EP1760312A2 (fr) * 2003-02-11 2007-03-07 Ganser-Hydromag Ag Pompe haute pression

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036557A (en) * 1959-06-04 1962-05-29 Kimsey Eric George Hydraulic motors and pumps
NL7015670A (fr) * 1970-10-07 1972-04-11
DE19635164A1 (de) * 1996-08-30 1998-03-05 Bosch Gmbh Robert Kolbenpumpe
DE19906626A1 (de) * 1998-10-06 2000-04-13 Mannesmann Rexroth Ag Pumpenanordnung
US20020189438A1 (en) * 2001-06-19 2002-12-19 Katsunori Furuta Fuel injection pump
EP1760312A2 (fr) * 2003-02-11 2007-03-07 Ganser-Hydromag Ag Pompe haute pression
WO2005111405A1 (fr) * 2004-05-13 2005-11-24 Robert Bosch Gmbh Pompe haute pression destinee a un dispositif d'injection de carburant d'un moteur a combustion interne

Also Published As

Publication number Publication date
ITMI20080431A1 (it) 2009-09-14

Similar Documents

Publication Publication Date Title
US8776669B2 (en) Anti-abrasion device and reciprocating compressor having the same
CN107002676B (zh) 电动涡旋压缩机
CN105683576B (zh) 电动涡旋压缩机
US20130084198A1 (en) Pump with centralized spring forces
CN106050646A (zh) 泵
US20150211454A1 (en) High pressure fuel pump
US8122811B2 (en) Fuel injection pump and method for assembling the same
WO2001055562A1 (fr) Dispositif de reglage du calage de distribution
US8337178B2 (en) Pump, particularly high-pressure fuel pump
JP6527784B2 (ja) リフタ
WO2009112308A1 (fr) Pompe haute pression pour distribuer du carburant à un moteur à combustion interne
US20110197837A1 (en) Cellular wheel
JP2008095573A (ja) 高圧ポンプ
JP2014202124A (ja) 往復動圧縮機
US20180163724A1 (en) Scroll compressor
US9151190B2 (en) Valve timing controller
US20100008809A1 (en) Conveying unit
WO2010015448A1 (fr) Pompe haute pression pour alimenter un moteur à combustion interne en carburant
EP3171061B1 (fr) Bloc de vanne, machine à fluide et appareil de génération d'énergie à énergie renouvelable
US20140079579A1 (en) High-pressure fuel pump
JP4691031B2 (ja) ピストンポンプ及び該ピストンポンプの使用法
WO2016102114A1 (fr) Pompe haute pression pour alimenter en carburant, de préférence du carburant pour moteur diesel, un moteur à combustion interne
JP6593945B1 (ja) ロータリ式シリンダ装置
US11466649B2 (en) Pumping unit for feeding fuel, preferably diesel fuel, to an internal combustion engine
JP4490318B2 (ja) ヨークハウジング及びモータ

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: 09719810

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09719810

Country of ref document: EP

Kind code of ref document: A1