EP0894194A1 - Injection device - Google Patents
Injection deviceInfo
- Publication number
- EP0894194A1 EP0894194A1 EP97908235A EP97908235A EP0894194A1 EP 0894194 A1 EP0894194 A1 EP 0894194A1 EP 97908235 A EP97908235 A EP 97908235A EP 97908235 A EP97908235 A EP 97908235A EP 0894194 A1 EP0894194 A1 EP 0894194A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing
- nozzle
- nozzle holder
- pressure channel
- injection device
- 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
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
Definitions
- the invention relates to an injection device for diesel engines with a nozzle holder, the pressure channel of which is connected on the one hand to the injection pump and on the other hand to the nozzle, the nozzle holder being sealingly supported by means of an intermediate disk with respect to a nozzle body which accommodates the nozzle needle in the longitudinal direction.
- a deformable metal hollow cylindrical sealing body is supported at one end against a sealing surface and, with increasing tightening of the nozzle clamping nut connecting the nozzle body to the nozzle holder, deforms increasingly against its seat.
- the object on which the present invention is based is to seal the pressure channel on the one hand and the interior of the nozzle body and nozzle holder on the other hand to prevent fuel from escaping through the thread of the nozzle clamping nut, which can be achieved with less effort.
- the sealing body ensures a sealing connection of the pressure channel in the nozzle holder with the intermediate disk or the nozzle body , with the conical sealing surfaces resulting in self-centering of the sealing body and thus ensuring that it seals even under high pressure conditions. In this way, peak pressures up to 1000 bar can be controlled. Furthermore, additional sealing measures for sealing the needle closing spring frame are unnecessary due to the concentric sealing edge.
- the sealing body is designed as a sealing cone with the conical seat in the nozzle holder of a corresponding conical outer shape and that Counter-sealing surface, on which the sealing cone is supported, is formed by the top of the washer.
- the sealing cone solves the partial task that the pressure channel is sealingly connected to the intermediate disk on the high-pressure side, without the need for fine machining of the facing end face of the nozzle holder.
- the deformability of the sealing cone is promoted in that the sealing cone is dimensioned shorter in the axial direction than the seat in which it is received.
- the sealing body is designed as a sealing ring with two externally oppositely conical sections, one section corresponding to the conical seat in the nozzle holder, the other section corresponding to a conically widened mouth of the pressure channel bore of the intermediate disk is and wherein the counter-sealing surface is formed by the mouth of the pressure channel bore of the washer.
- FIG. 1 shows a longitudinal section through the nozzle holder / nozzle body before the nozzle clamping nut is fully tightened
- FIG. 2 shows an enlarged section of FIG. 1 in the area of the pressure channel seal
- FIG. 3 shows a longitudinal section according to FIG. 1 after the nozzle clamping nut has been fully tightened
- nozzle holder 1 with a pressure channel 2, in which the fuel is supplied in the direction of arrow PI from the injection pump, not shown, and a nozzle body 3, which is also provided with a pressure channel 4, which continues the pressure channel 2 of the nozzle holder 1 via a high-pressure connection to be described in more detail.
- the nozzle needle 5 is seated in a central bore, the inner needle end 6 of which is spherical.
- the needle end 6 of the nozzle needle 5 is biased in the direction of the nozzle by means of a compression spring 8 which is arranged in a central bore 7 of the nozzle holder 1. It exerts a force acting on the needle end 6 in the closing direction by being supported on a pressure pin 9 which is seated on the crowned needle end 6 of the nozzle needle 5.
- Nozzle body 3 and nozzle holder 1 are clamped together by means of a nozzle clamping nut 10, which by means of an internal thread 11 is screwed onto an external thread 12 of the nozzle holder 1.
- the high-pressure connection between nozzle holder 1 and nozzle body 3 is established by means of an intermediate disk 13, the two opposite ends of which are finely machined by hardening, grinding and lapping.
- the needle end 6 protrudes through a central bore 14 in the intermediate disk 13.
- the nozzle clamping nut 10 is not yet fully tightened, so that a gap 17 is formed between the top 15 of the intermediate disk 13 and the associated end face 16 of the nozzle holder 1.
- This gap 17 is bridged by a sealing cone 18 made of a steel alloy with properties which can be deformed to a limited extent, for example made of free-cutting steel.
- the sealing cone 18 has a conical outer surface which widens towards the intermediate disk 13 and with which it projects into a corresponding conical seat 19 in the mouth region of the pressure channel 2 of the nozzle holder 1.
- the sealing cone 18 deforms inward as shown in FIG. 3, forming an end bead 20 until it is finally completely accommodated in the interior of the seat 19.
- the sealing cone forms a seal that is sealed against the high pressure in the pressure channel 2, on the one hand with the seat 19, and on the other hand with the upper side 15 of the intermediate disk 13.
- the high-pressure area is sealed off from the low-pressure area in that, as in FIG. 2 enlarged, a sealing edge extends concentrically through the face D 16 of the nozzle holder 1 through the location D coinciding with the wall of the needle closing spring chamber, such that the sealing edge coincides with the central bore 7 of the nozzle holder 1 on its end face 16.
- the location D thus forms the apex for the angle ⁇ between 0.5 ° and 3.0 °, which defines a residual flat surface 21 which runs obliquely to the end face 16 of the nozzle holder 1.
- the remaining surface 21 thus forms the sealing edge at D.
- the sealing edge results in an additional barrier increasing the sealing effect between the high-pressure part formed by the two pressure channels 2, 4 on the one hand and the low-pressure part which is formed by the central interiors in the nozzle holder 1 and in the nozzle body 3 is limited.
- FIG. 4 and 5 each show a variant of the high-pressure side pressure channel seal in a detail enlargement according to FIG. 2.
- the sealing cone 18 is replaced by a sealing ring 22, which essentially consists of two on the outside there is conical sections 26, 27, the conical surfaces of which taper towards the respective end of the sealing ring 22.
- the top Section 26, as described in relation to FIG. 2 is received in the lower end of the pressure channel 2, the lower section 27 enters a correspondingly conically widened mouth 23 of the pressure channel bore 2a of the intermediate disk 13 on its upper side 15.
- the sealing effect is further improved by the enlargement of the sealing surfaces compared to FIG. 3.
- a sealing tube 25 is used which, like the sealing ring 22 (FIG. 4), has two conical sections 26, 27 at the two ends, which are attached to a hollow cylindrical central section 24, which is closely surrounded by a support hole 29 of the intermediate plate 13. While the upper section 26 is received in the conical seat 19 of the pressure channel 2 as described in relation to FIG. 2, the lower section 27 enters a correspondingly conically widened mouth 28 of the pressure channel 4 of the nozzle body 3.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
- Percussion Or Vibration Massage (AREA)
- Window Of Vehicle (AREA)
- Glass Compositions (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Polarising Elements (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19614980 | 1996-04-16 | ||
DE19614980A DE19614980C1 (en) | 1996-04-16 | 1996-04-16 | Injector |
PCT/EP1997/001293 WO1997039237A1 (en) | 1996-04-16 | 1997-03-14 | Injection device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0894194A1 true EP0894194A1 (en) | 1999-02-03 |
EP0894194B1 EP0894194B1 (en) | 2001-12-19 |
Family
ID=7791411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97908235A Expired - Lifetime EP0894194B1 (en) | 1996-04-16 | 1997-03-14 | Injection device |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0894194B1 (en) |
JP (1) | JP3737126B2 (en) |
KR (1) | KR100440819B1 (en) |
CN (1) | CN1072771C (en) |
AT (1) | ATE211217T1 (en) |
BR (1) | BR9708571A (en) |
CZ (1) | CZ289269B6 (en) |
DE (2) | DE19614980C1 (en) |
IN (1) | IN192023B (en) |
TR (1) | TR199802094T2 (en) |
WO (1) | WO1997039237A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19914720B4 (en) * | 1999-03-31 | 2005-10-13 | Siemens Ag | Fuel injection valve for an internal combustion engine |
DE19915685A1 (en) * | 1999-04-07 | 2000-10-12 | Delphi Tech Inc | Injection valve for fuel injection in an internal combustion engine |
DE10008554A1 (en) * | 2000-02-24 | 2001-08-30 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10155677A1 (en) * | 2001-11-13 | 2003-05-22 | Bosch Gmbh Robert | Fuel injection valve, for an IC motor, has a housing with two bodies and a high pressure fuel channel through the dividing line between them, with an inner seal with elastic distortion at the junction between the bodies |
DE102004022428A1 (en) * | 2004-05-06 | 2005-12-01 | Siemens Ag | Injection valve for internal combustion engines |
DE102008056519A1 (en) * | 2008-11-08 | 2010-05-12 | Man Diesel Se | Sealing system for sealing high pressure sealing area between components and component section of fuel-injection valve of combustion engine, has channels and channel section, which are integrated in components and component sections |
AT511716B1 (en) * | 2011-12-09 | 2013-02-15 | Bosch Gmbh Robert | CONNECTION OF HIGH PRESSURE MEDIUM LEADING COMPONENTS OF AN INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE685057C (en) * | 1933-12-28 | 1939-12-11 | Bosch Gmbh Robert | Arrangement for regulating the amount of fuel injected in vehicle diesel engines |
DE866423C (en) * | 1951-10-04 | 1953-02-09 | Eduard Dr Inden | Pipe connection or pipe coupling |
FR2341751A1 (en) * | 1976-02-20 | 1977-09-16 | Semt | PROCEDURE AND DEVICE FOR REDUCING THE RISK OF LEAKING INJECTION FUEL, ESPECIALLY IN THE COOLING CIRCUIT OF THE INJECTORS OF A DIESEL ENGINE |
JPS6066222A (en) * | 1983-09-21 | 1985-04-16 | Olympus Optical Co Ltd | Endoscope |
DE3819729A1 (en) * | 1987-11-30 | 1989-06-08 | Ernst Nock | PIPE CONNECTION |
US5205492A (en) * | 1991-12-16 | 1993-04-27 | Gregory Khinchuk | Fuel injection valve |
JPH0666222A (en) * | 1992-08-19 | 1994-03-08 | Nippondenso Co Ltd | Fuel injector |
-
1996
- 1996-04-16 DE DE19614980A patent/DE19614980C1/en not_active Expired - Fee Related
-
1997
- 1997-03-14 DE DE59705893T patent/DE59705893D1/en not_active Expired - Fee Related
- 1997-03-14 KR KR10-1998-0706042A patent/KR100440819B1/en not_active IP Right Cessation
- 1997-03-14 BR BR9708571A patent/BR9708571A/en not_active IP Right Cessation
- 1997-03-14 JP JP53667997A patent/JP3737126B2/en not_active Expired - Fee Related
- 1997-03-14 TR TR1998/02094T patent/TR199802094T2/en unknown
- 1997-03-14 EP EP97908235A patent/EP0894194B1/en not_active Expired - Lifetime
- 1997-03-14 CZ CZ19983077A patent/CZ289269B6/en not_active IP Right Cessation
- 1997-03-14 AT AT97908235T patent/ATE211217T1/en not_active IP Right Cessation
- 1997-03-14 CN CN97193354A patent/CN1072771C/en not_active Expired - Fee Related
- 1997-03-14 WO PCT/EP1997/001293 patent/WO1997039237A1/en active IP Right Grant
- 1997-04-03 IN IN591CA1997 patent/IN192023B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9739237A1 * |
Also Published As
Publication number | Publication date |
---|---|
TR199802094T2 (en) | 1999-03-22 |
CZ307798A3 (en) | 1999-06-16 |
ATE211217T1 (en) | 2002-01-15 |
DE59705893D1 (en) | 2002-01-31 |
KR19990082312A (en) | 1999-11-25 |
JP2000508733A (en) | 2000-07-11 |
CN1214759A (en) | 1999-04-21 |
JP3737126B2 (en) | 2006-01-18 |
EP0894194B1 (en) | 2001-12-19 |
WO1997039237A1 (en) | 1997-10-23 |
BR9708571A (en) | 1999-08-03 |
CZ289269B6 (en) | 2001-12-12 |
DE19614980C1 (en) | 1997-09-18 |
KR100440819B1 (en) | 2004-10-15 |
IN192023B (en) | 2004-02-07 |
CN1072771C (en) | 2001-10-10 |
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