CN101285442A - Fuel pump - Google Patents

Fuel pump Download PDF

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Publication number
CN101285442A
CN101285442A CNA2007101857977A CN200710185797A CN101285442A CN 101285442 A CN101285442 A CN 101285442A CN A2007101857977 A CNA2007101857977 A CN A2007101857977A CN 200710185797 A CN200710185797 A CN 200710185797A CN 101285442 A CN101285442 A CN 101285442A
Authority
CN
China
Prior art keywords
groove
pump
petrolift
pressure
pump cylinder
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
CNA2007101857977A
Other languages
Chinese (zh)
Other versions
CN101285442B (en
Inventor
T·格里茨科
T·哈曼
L·梅尔
D·纽曼
H·沙尔
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.)
MAN Energy Solutions SE
Original Assignee
MAN Diesel SE
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 MAN Diesel SE filed Critical MAN Diesel SE
Publication of CN101285442A publication Critical patent/CN101285442A/en
Application granted granted Critical
Publication of CN101285442B publication Critical patent/CN101285442B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M59/442—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 means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders

Landscapes

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

Abstract

The invention relates to a fuel pump, in particular a high-pressure fuel pump of a common rail fuel system, having a pump piston guided in a pump cylinder, wherein at least one leakage groove is formed in the region of a chamber of the pump cylinder in which the pump piston is guided, by means of which leakage groove fuel occurring between the pump cylinder and the pump piston can be discharged. According to the invention, at least one groove (18) which can be acted upon by a gaseous medium is formed in the region of the chamber (12) of the pump cylinder (11) in which the pump piston (13) is guided.

Description

Petrolift
Technical field
The present invention relates to a kind of high pressure fuel pump of the petrolift as described in the preamble, particularly common rail fuel system according to claim 1.
Background technique
Petrolift has a pump cylinder, and wherein supporting movably or guide in pump cylinder has pump piston.Pump piston is by the motion up and down in pump cylinder of one or more cams, so fuel is inhaled into and flowed to customer by petrolift, for example the injection valve of fuel system.
In the known in practice petrolift, supported movably or guided therein in the zone of pump cylinder of this pump piston and had one or more leakage grooves, so that the fuel leak that will between pump cylinder and pump piston, produce or be discharged in this fuel system or be discharged into and leak in the loop.Particularly when fuel pump application is in the fuel system of heavy oil or gas oil running, may form as carbon deposit (Verlackungen) in the guiding zone between pump piston and the pump cylinder is the sedimentation of fuel of feature, and it can make the guiding gap smaller between pump piston and the pump cylinder and may therefore cause seizure of piston.
In addition known in the known in practice petrolift, in wherein movably in the cavity area of supporting or pilot pump piston of pump cylinder, at least one groove is set, this groove loads sealing oil (Sperroel).
By each groove that loads sealing oil, should be able to prevent that this fuel that can not be discharged from by leakage grooves from flowing in the lubricant oil.But wherein existing problems are that sealing oil may mix mutually with fuel.This particularly is this situation when using when gas oil acts as a fuel.
Summary of the invention
Task of the present invention thus is that novel petrolift is provided.This technical problem is solved by the petrolift that claim 1 limits.According to the present invention, in its of pump cylinder, be configured with the groove that at least one can load gaseous medium in the cavity area of pilot pump piston.
Advise in the conception plans of the present invention herein, in its of pump cylinder, be configured with the groove that at least one can load gaseous medium in the zone of the chamber of pilot pump piston.According to the present invention, above-mentioned groove does not load sealing oil but loads blanket gas (Sperrgas) according to this.Having advantage like this is, can not cause sealing oil and fuel mix.
According to preferred expansion scheme of the present invention, the above-mentioned groove that loads gaseous medium by pipeline and internal-combustion engine combustion air system or pressurized air system or start air system and be connected so that make above-mentioned each groove all load combustion air or pressurized air or start air.
Description of drawings
Preferred expansion scheme of the present invention result from the dependent claims and following explanation in.Embodiments of the invention will at length be set forth by accompanying drawing, but the present invention does not limit to therewith.Accompanying drawing illustrates:
Fig. 1: according to the schematic section according to petrolift of the present invention of the embodiment of the invention.
The reference symbol table
10 petrolifts
11 pump cylinders
12 chambers
13 pump pistons
14 cams
15 leakage grooves
16 leakage grooves
17 leakage pipes
18 grooves
19 pipelines
Embodiment
Fig. 1 shows the schematic section of embodiments of the invention petrolift 10, wherein the petrolift 10 of Fig. 1 comprise pump cylinder 11 and in the chamber (piston cavity) 12 of pump cylinder 11 movably the supporting or the guiding pump piston 13.
According to Fig. 1, pump piston 13 can controllably move up and down in pump cylinder 11 by cam 14, and by this motion of pump piston 13 in pump cylinder 11, fuel can be inhaled into and can be transferred to customer thus.
In the chamber 12 of the wherein pilot pump piston 13 of pump cylinder 11, be provided with at least one leakage grooves.In the embodiment show in figure 1, in the zone of the chamber 12 of pump cylinder 11, be provided with two leakage grooves 15 and 16.
By leakage grooves 15 and 16, the fuel leak that produces between pump cylinder 11 and pump piston 13 can be discharged, and or can enter in the fuel supply system and/or do not enter in the leakage loop with having pressure.According to Fig. 1, fuel leak can be discharged by common leakage pipe 17 from leakage grooves 15 and 16.
According to the present invention, in the zone of the chamber 12 of the wherein pilot pump piston 13 of pump cylinder 11, except above-mentioned leakage grooves 15,16, also be provided with other groove, this groove can load the medium of gaseous state.
In the embodiment in figure 1, in chamber 12 zones of pump cylinder 11, in identical zone, be provided with unique groove 18.
As already described, groove 18 can load gaseous medium, that is blanket gas, and wherein this gaseous medium is meant air or inert gas.And possible be to give combustion air or the pressurized air that groove 18 loads internal-combustion engines or start air.
According to Fig. 1, this groove 18 that can load gaseous medium is connected with the unshowned reservoir that is used for gaseous medium by pipeline 19.Therefore when groove 18 can load the combustion air or the pressurized air of internal-combustion engine or start air, groove 18, exactly is connected with under the situation of decompressor in the centre just with the combustion air system of internal-combustion engine or pressurized air system or start air system and be connected by pipeline 19.By this decompressor, the pressure of combustion air or pressurized air or startup air is lowered to the pressure of maximum 20bar, and therefore the pressure that exists in groove 18 is 20bar to the maximum.
In the embodiment show in figure 1, the groove 18 that can load gaseous medium is installed in the lower face section of pump cylinder 11 below two leakage grooves 15 and 16.So be chosen in the pressure that exists in the groove 18, make this pressure greater than the pressure that in adjacent leakage grooves 16, exists, this pressure that exists in adjacent leakage grooves 16 has been lowered, and its reduction amplitude is that the pressure that forms between groove 18 and the adjacent leakage grooves 16 falls.

Claims (10)

1. petrolift, the high pressure fuel pump of common rail fuel system particularly, has the pump piston of in pump cylinder, guiding, wherein in its of pump cylinder, guiding in the zone of chamber of pump piston, be configured with at least one leakage grooves, can discharge the fuel leak that between pump cylinder and pump piston, produces by this leakage grooves, it is characterized in that:
In its of pump cylinder (11), guiding in the zone of chamber (12) of pump piston (13), be configured with at least one groove that can load gaseous medium (18).
2. by the petrolift of claim 1, it is characterized in that:
Above-mentioned each groove (18) all loads air.
3. by the petrolift of claim 1, it is characterized in that:
Above-mentioned each groove (18) all loads inert gas.
4. by each described petrolift among the claim 1-3, it is characterized in that:
Above-mentioned each groove (18) is connected with the reservoir that is used for gaseous medium by pipeline (19).
5. by each described petrolift among the claim 1-4, it is characterized in that:
Above-mentioned each groove (18) is connected with the combustion air system or the pressurized air system of internal-combustion engine by pipeline (19), so that each groove (18) all loads combustion air or pressurized air.
6. by the petrolift of claim 5, it is characterized in that:
Between each groove (18) and combustion air system or pressurized air system, be connected with decompressor, so that make the combustion air or the pressurized air that are transported to each groove (18) be reduced to the pressure that is 20bar to the maximum.
7. by each described petrolift among the claim 1-4, it is characterized in that:
Each groove (18) is connected with the startup air system of internal-combustion engine by pipeline (19), starts air so that above-mentioned each groove (18) is all loaded.
8. by the petrolift of claim 7, it is characterized in that:
Between each groove (18) and startup air system, connect decompressor, so that make the startup air that is transported to each groove (18) be reduced to the pressure that is 20bar to the maximum.
9. by each described petrolift among the claim 1-8, it is characterized in that:
Each groove (18) that is loaded with gaseous medium is installed in the below of each leakage grooves (15,16) in pump cylinder (11).
10. by each described petrolift among the claim 1-9, it is characterized in that:
The pressure that exists in the groove that can load gaseous medium (18) is greater than the pressure that exists in adjacent leakage grooves (16), this pressure that exists in adjacent leakage grooves (16) has been lowered, and its reduction amplitude is that the pressure of formation between groove (18) and the adjacent leakage grooves (16) falls.
CN2007101857977A 2006-12-22 2007-12-21 Fuel pump Expired - Fee Related CN101285442B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061253A DE102006061253A1 (en) 2006-12-22 2006-12-22 High-pressure fuel pump for common-rail fuel injection systems has leakage grooves around bore for piston and additional groove at its base, into which air or inert gas can be injected
DE102006061253.1 2006-12-22

Publications (2)

Publication Number Publication Date
CN101285442A true CN101285442A (en) 2008-10-15
CN101285442B CN101285442B (en) 2012-01-04

Family

ID=38951513

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007101857977A Expired - Fee Related CN101285442B (en) 2006-12-22 2007-12-21 Fuel pump

Country Status (5)

Country Link
JP (1) JP4733102B2 (en)
KR (1) KR101375200B1 (en)
CN (1) CN101285442B (en)
DE (1) DE102006061253A1 (en)
FI (1) FI123415B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104455858A (en) * 2014-11-12 2015-03-25 贵州黔南科技塑业有限公司 Plastic hose quick connector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1401971B1 (en) * 2010-09-27 2013-08-28 Bosch Gmbh Robert HIGH PRESSURE PUMP FOR FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE
US10400764B2 (en) 2016-04-15 2019-09-03 S.P.M. Flow Control, Inc. Well service valve seat removal

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR886831A (en) * 1941-11-18 1943-10-26
JPS62105361A (en) * 1985-10-31 1987-05-15 Toshiba Corp Portable electronic device
JPS62105361U (en) * 1985-12-20 1987-07-04
DE19627757A1 (en) * 1996-07-10 1998-01-15 Bosch Gmbh Robert Fuel pump
JP2003206825A (en) * 2002-01-16 2003-07-25 Denso Corp High pressure pump for alternate fuel
DE10222279A1 (en) * 2002-05-18 2003-11-27 Deutz Ag Injection pump with plunger seal for internal combustion engine has plunger sealed from plunger socket in tappet side region and displacement sleeve sealed from housing in work chamber region
JP4013199B2 (en) 2003-05-16 2007-11-28 ボッシュ株式会社 Fuel injection pump
JP2005042735A (en) * 2004-11-04 2005-02-17 Yanmar Co Ltd Fuel injection equipment
JP2006152976A (en) 2004-12-01 2006-06-15 Nikki Co Ltd High pressure fuel pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104455858A (en) * 2014-11-12 2015-03-25 贵州黔南科技塑业有限公司 Plastic hose quick connector

Also Published As

Publication number Publication date
DE102006061253A1 (en) 2008-06-26
FI123415B (en) 2013-04-15
KR101375200B1 (en) 2014-03-18
FI20070978A (en) 2008-06-23
CN101285442B (en) 2012-01-04
FI20070978A0 (en) 2007-12-13
KR20080059053A (en) 2008-06-26
JP2008157233A (en) 2008-07-10
JP4733102B2 (en) 2011-07-27

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CP01 Change in the name or title of a patent holder

Address after: Augsburg

Patentee after: MAN ENERGY SOLUTIONS SE

Address before: Augsburg

Patentee before: Man Diesel & Turbo SE

CP01 Change in the name or title of a patent holder
TR01 Transfer of patent right

Effective date of registration: 20190423

Address after: Augsburg

Patentee after: Man Diesel & Turbo SE

Address before: Augsburg

Patentee before: Man Diesel Se

TR01 Transfer of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120104

Termination date: 20191221

CF01 Termination of patent right due to non-payment of annual fee