GB2539401A - Hydraulic lash adjuster arranged in a servo injector - Google Patents

Hydraulic lash adjuster arranged in a servo injector Download PDF

Info

Publication number
GB2539401A
GB2539401A GB1510407.8A GB201510407A GB2539401A GB 2539401 A GB2539401 A GB 2539401A GB 201510407 A GB201510407 A GB 201510407A GB 2539401 A GB2539401 A GB 2539401A
Authority
GB
United Kingdom
Prior art keywords
actuator
injector
upper piston
lash adjuster
piston
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Withdrawn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
GB1510407.8A
Other versions
GB201510407D0 (en
Inventor
Tapin Christophe
Torresani Alexandre
Guignon Gael
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Priority to GB1510407.8A priority Critical patent/GB2539401A/en
Publication of GB201510407D0 publication Critical patent/GB201510407D0/en
Publication of GB2539401A publication Critical patent/GB2539401A/en
Withdrawn legal-status Critical Current

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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical

Abstract

A hydraulic lash adjuster 30 is adapted to compensate for axial lash between the actuator member (28, fig.1) and the control valve assembly (32, fig.2) of a servo acting injector (10, fig.1). The lash adjuster 30 comprises a lower piston 70, an upper piston 64, an external spring 92 and an internal spring 82. Both springs are axially biasing the upper piston toward the actuator member (28), the internal spring 82 being compressed between the lower piston 70 and the upper piston 64. Moreover, the external spring 92 is arranged to move the upper piston away from the lower piston, preferably by pushing the projection 90 of a transition member 84 which is attached to or integral with the upper piston 64, the transition member then pulling the upper piston 64 along with it and away from the lower piston 70.

Description

Hydraulic lash adjuster arranged in a servo injector
TECHNICAL FIELD
The present invention relates to a hydraulic lash adjuster that is arranged in a servo injector.
BACKGROUND OF THE INVENTION
Servo acting injectors having a piezo or magneto restrictive actuator are provided with hydraulic lash adjusters arranged between the actuator and the control valve of the injector, this in order to transmit force of displacement from the actuator to the valve. Therefore, the valve commutes between an open position, enabling fuel at high pressure to exit a control chamber and, a closed position forbidding said exit of fuel.
The adjusters comprise an actuator-side member, connected to the actuator, and a valve-side member connected to the valve. The actuator-side member is solicited toward the actuator by a very stiff cage spring while the valve-side member is solicited by a lesser stiff coil spring toward a closed position of the control valve. Between the actuator-side member and the valve-side member is provided a chamber which in use is filled with fuel, so that the displacement of the actuator is transmitted to the valve-side member.
Recent developments disclosed in application GB1420017 propose an embodiment of a hydraulic lash adjuster solving the problem of the important overall length of the lash adjuster. The embodiment remains complex, and therefore costly.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to resolve or at least mitigate the above mentioned problems in providinga hydraulic lash adjuster adapted to compensate axial lash between the actuator member and the control valve assembly of a servo acting injector. The hydraulic lash adjuster comprises a lower piston, an upper piston, an external spring and an internal spring, both springs axially biasing the upper piston toward the actuator member. More precisely, the internal spring is compressed between the lower piston and the upper piston.
Furthermore, the external spring is arranged to pull the upper piston away from the lower piston.
The lash adjuster further comprises a transmission member interposed between the upper piston and the external spring, the transmission member being adapted to transmit to the upper piston the pulling force generated by the external spring.
More precisely, the transmission member extends beyond the upper piston so that it is adapted to receive and hold in place the actuator member on the upper face of the upper piston.
Also, the transmission member is tubular axially extending from the periphery the upper face of the upper piston up to an upper extremity, the upper face of the upper piston and the tubular member forming a cup-like member in which can be placed the lower end of the actuator member.
Also, the external spring surrounds the transmission member, the external spring being adapted to be compressed between the upper extremity of the transmission member and a face of the injector body in order to transmit and upward pulling force to the upper piston.
Also, the actuator assembly comprises a cylindrical actuator member and a hydraulic lash adjuster as presented in the paragraphs before.
More particularly, the actuator member is cylindrical and the hydraulic lash adjuster is as presented in the paragraphs before, the actuator member being held in the cup-like member.
The actuator further comprises a sleeve sealingly enclosing and protecting the actuator member.
More particularly, the actuator member s a piezo-actuator or a magneto restrictive actuator.
The invention further extends to a servo piezo acting injector wherein a cap nut is tightened in order to fixedly maintained together the components of the body of the injector, said injector body enclosing an actuator assembly as presented in the paragraphs before, said actuator being compressed between a shoulder face of the body and, the external spring that abuts against a lower face of the body. The actuator assembly is as presented in the paragraphs before. The invention further extends to a method of assembly of a servo acting injector, the injector being as claimed in any one of the claims to, the method comprising the steps of a) providing an uncompressed actuator assembly as claimed in any one of the claims to; b) inserting the uncompressed actuator assembly in a bore provided in the injector body, so that the actuator body abuts against a shoulder face provided at the end of the bore and, the external spring slightly protrudes outside the bore; c) arranging in place a control valve, a nozzle and a cap nut; d) tightening the cap nut so that the external spring is compressed, compressing the actuator member.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described by way of example with reference to the accompanying drawings in which: Figure 1 is a servo piezo acting fuel injector provided with an actuator assembly as per the invention.
Figure 2 is the actuator assembly of figure 1.
Figure 3 is a detailed axial section of the hydraulic lash adjuster of the actuator assembly of figures 1 and 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
To ease and clarify the following description, the top-down orientation of the figures is arbitrarily chosen for reference and, words and expressions such as "upper, lower, above, under, over..." may be utilized without any intention to limit the invention.
Figure lrepresents a servo acting fuel injector 10 extending generally along a main axis Al from an injector head 12, drawn at the top of the figure, to an injector nozzle 14, drawn at the bottom of the figure. The injector 10 has an injector body 16 constituted of the assembly of an actuator body 18, a valve body 20, a nozzle body 22 and a cap nut 24 that holds the nozzle body 22, surrounds the valve body 20 and that is screwed and strongly tightened on the actuator body 18. From head 12 to nozzle 14, in said injector body 16 are arranged, in the actuator body 18, an actuator assembly 26 having an actuator member 28, either a piezo or a magneto restrictive actuator, and an hydraulic lash adjuster 30, in the valve body 20 a control valve assembly 32 and, in the nozzle body 22 a needle valve 34. Also, electrical links 36 are provided to energize the actuator member 28, said links extending from the actuator member 28 to a connector 38 arranged in the injector head 12 of the injector 10.
The actuator assembly 26 and the control valve assembly 32 extend along a second axis A2 parallel and offset from the main axis Al that is also the axis of the needle valve 34.
Said offset was first introduced in EP1693563 and, although it has multiple advantages, the present invention can be implemented in an injector not having said offset.
As previously described in application number GB1314826, the valve assembly 32 comprises an upper valve 40 normally closed and a lower valve 42 normally open. Each of the two valves is a two-way valve, or "on-off' valve, the arrangement of said two two-way valves operating as a three-way valve. The persons skilled in the art are invited to learn from GB1314826 about the detailed operation of the control valve assembly 32.
The injector body 16 further accommodates a high pressure circuit 44, downwardly extending from an inlet 46 arranged in the injector head 12 to a plurality of spray holes 48 arranged a the tip of the nozzle 14, said high pressure circuit also comprising a lateral branch 50 extending to a control chamber 52 wherein protrudes the upper extremity of the needle valve 34 and, a low pressure return circuit 54 extending from said control chamber 52 to an outlet 56 also arranged in the head 12 of the injector.
For illustration purposes and without any intent to limit the present invention, nor to detail the complete operation of fuel injection equipment's, "high pressure" should be understood as a pressure typically superior to 2000 bars, or 2500 bars or even 3000 bars.
A preliminary general description of the operation is now shared. In use, when the actuator member 28 is not energized it retracts and does not bias the lash adjuster 30, which in turn enables the upper valve 40 to rest in its normal closed position. Then, fuel at high pressure fills the control chamber 52 situated right above the needle valve 34, the pressure in the chamber 52 biasing said needle valve 34 in a closed position forbidding fuel spray.
When the actuator member 28 is energized, it elongates and downwardly biases the lash adjuster 30, which in turn biases the upper valve 40 into an open position. The fuel is now enabled to exit the control chamber 52 toward the low pressure return circuit 54, the pressure in the chamber 52 decreasing and allowing the needle 34 to move upward in an open position and, high pressure fuel to be sprayed through the spray holes 48.
An advantage of such a piezo actuator, over an electromagnetic actuator, is that for same dimensions, when energized the direct acting actuator generates a much superior force than the electromagnetic actuator, said superior force enabling to displace components that would require, otherwise much larger actuator.
The actuator assembly 26 is now described more in details in reference to figures 2 and 3. The actuator assembly comprises, from top to bottom of the figure a head member 58, the actuator member 28 and the hydraulic lash adjuster 30.
The head member 58 axially A2 extends between an upper face and a lower face and, externally the head member 58 has a substantially cylindrical shape with an upper portion having narrower than the lower portion which cooperates with the actuator member 28. In between said upper and lower portions, the head member 58 is provided with a male conical shoulder face 60 adapted to cooperate in abutment against a female conical shoulder face 62 provided in the injector body 16. Alternatively to male and female conical faces, other embodiments can be designed with flat faces for instance or with a cylindrical face cooperating with a conical face. The head member 58 is further provided with inner channels for the electrical links 36 connecting the actuator member 28 and upwardly extending toward the connector 38.
The actuator member 28 is basically cylindrical and is axially A2 extending from a top face that cooperates with the head member 58 to a lower face that cooperates with the hydraulic lash adjuster 30.
The lash adjuster 30 axially extends along the second axis A2 and it comprises an upper piston 64 having a cylindrical body 66 covered by a head cap 68 radially extending beyond the peripheral edges of cylindrical body 66. The upper piston 64 is axially slidably arranged in cup-like lower piston 70 which has a peripheral cylindrical wall 72 and a bottom wall 76 forming said cup-like shape and, below the bottom wall 76, the peripheral wall 72 downwardly extends toward a lower rest face 74. At the centre of the under face 78 of the bottom wall 76 downwardly extends a protrusion 80 that, in use, contacts the upper face of the stem of the upper valve 40.
Inside the cup-like lower piston 70, sandwiched between the bottom wall 76 of the lower piston 70 and the under face of the upper piston 64, a disc-spring assembly 82 is compressed biasing the upper and lower pistons in opposite directions.
The lash adjuster 30 further comprises a transmission member 84 that is tubular axially A2 upwardly extending from a lower extremity 86 fixed by laser welding or brazing or gluing or, alternatively could be integral to the upper piston 64, or other known means, to the peripheral face of the head cap 68 to, an upper distal extremity 88. In the vicinity of said distal extremity 88, the transmission member 84 is provided with an outward radial annular projection 90 protruding from the external face of the transmission member 84. As visible on the figures, the lash adjuster 30 and the transmission member 84 define another cup-like member 98 of which the upper face of the upper piston 64 is the bottom face and, the transmission member 84 is the peripheral wall.
The actuator member 28 is inserted in said cup-like member 98 so that the lower face of the actuator member rests on the upper face of the upper piston 64 and it upwardly axially A2 protrudes outside the cup-like member 98 toward the 30 head member 58.
The actuator assembly 30 further comprises a convoluted metallic sleeve 102, having high axial elasticity and very low axial A2 stiffness said sleeve 102, or bellow, being fixed by laser welding or brazing or gluing, or other means, at one extremity on the head member 58 and at the other extremity on the upper extremity 88 of the transmission member. The sleeve 102 and the transmission member 84 enclose together the lash adjuster 30 and the actuator member 28 protecting the actuator member 28 from any fluid contact.
A cylindrical cage spring 92 having very high axial A2 stiffness is externally engaged around the transmission member 84 and it axially extends from a lower circular edge 94, adapted to abut against an upper face of the valve body 20, to an upper circular edge 96 adapted to abut against the under face of the outward radial protrusion 90.
Before being arranged in the injector 10, the actuator member 28 is not compressed. It is only during the final assembly of the injector 10 that the actuator member 28 get compressed which is an important functional characteristic.
The actuator body 18 is provided with an internal bore 104 narrowing at its upper end where the female conical shoulder face 62 is. In the bore 104 is inserted the actuator assembly 26 so that the male conical shoulder face 60 of the head member comes in abutment against said female conical shoulder face 62. When arranging the control valve assembly 32, the initial contact occurs between the lower circular edge 94 of the cage spring and the upper face 100 of the valve body, or any other member arranged on said upper face 100. A small gap remains at the interface between the actuator body 18 and the valve body 20, it is only when the cap nut 24 is tightened that said gap is closed. In doing so the cage spring 92 compresses between the valve body 20 and the outward radial projection 90 of the transmission member which in turn, transmits an upward pulling force to the upper piston 64 of the lash adjuster 30, itself slightly moving in the upward direction and compressing the actuator member 28 between the upper piston 64 and the head member 58 that is in firm abutment against the injector body 18.
LIST OF REFERENCES
Al main axis A2 second axis injector 12 head of the injector 14 nozzle of the injector 16 injector body 18 actuator body valve body 22 nozzle body 24 cap nut 26 actuator assembly 28 actuator member hydraulic lash adjuster 32 control valve assembly 34 needle 36 electrical links 38 connector upper valve 42 lower valve 44 high pressure circuit 46 inlet 48 spray holes lateral branch of the high pressure circuit 52 control chamber 54 low pressure return circuit 56 outlet 58 head member male conical shoulder face of the head member 62 female conical shoulder face of the injector body 64 upper piston 66 cylindrical body 68 head cap lower piston 72 peripheral wall 74 rest face of the lower piston 76 bottom wall 78 under face of the bottom wall protrusion 82 disc-spring assembly 84 tubular transmission member 86 lower extremity of the transmission member 88 upper extremity of the transmission member outward radial projection 92 cage spring 94 lower circular edge of the cage spring 96 upper circular edge of the cage spring 98 cup-like member upper face of the valve body 102 sleeve 104 bore 110 Method

Claims (13)

  1. CLAIMS1. Hydraulic lash adjuster (30) adapted to compensate axial lash between the actuator member (28) and the control valve assembly (32) of a servo acting injector (10), the hydraulic lash adjuster (30) comprising a lower piston (70), an upper piston (64), an external spring (92) and an internal spring (82), both springs (92, 82) axially biasing the upper piston (64) toward the actuator member (28), the internal spring (82) being compressed between the lower piston (70) and the upper piston (64), characterized in that the external spring (92) is arranged to pull the upper piston (64) away from the lower piston (70).
  2. 2. Hydraulic lash adjuster (30) as claimed in the preceding claim further comprising a transmission member (84) interposed between the upper piston (64) and the external spring (92), the transmission member (84) being adapted to transmit to the upper piston (64) the pulling force generated by the external spring (92).
  3. 3. Hydraulic lash adjuster (30) as claimed in claim 2 wherein the transmission member (84) extends beyond the upper piston (64) so that it is adapted to receive and hold in place the actuator member (28) on the upper face of the upper piston (64).
  4. 4. Hydraulic lash adjuster (30) as claimed in any one of the claims 2 or 3 wherein the transmission member (84) is tubular axially extending from the periphery the upper face of the upper piston (64) up to an upper extremity (88), the upper face of the upper piston (64) and the tubular member (84) forming a cup-like member (98) in which can be placed the lower end of the actuator member (28).
  5. 5. Hydraulic lash adjuster (30) as claimed in claim 4 wherein the external spring (92) surrounds the transmission member (84), the external spring (92) being adapted to be compressed between the upper extremity (88) of the transmission member and a face of the injector body in order to transmit and upward pulling force to the upper piston (64).
  6. 6. Actuator assembly (26) for servo piezo acting injector (10), the actuator assembly (26) comprising a cylindrical actuator member (28) and a hydraulic lash adjuster (30) as claimed in any one of the preceding claims.
  7. 7. Actuator assembly (26) as claimed in claim 6 wherein the actuator member (28) is cylindrical and the hydraulic lash adjuster (30) is as claimed in any one of the claims 4 to 6, the actuator member (28) being held in the cup-like member (98).
  8. 8. Actuator assembly (26) as claimed in any one of the claims 6 or 7 further comprising a sleeve (102) sealingly enclosing and protecting the actuator member (28).
  9. 9. Actuator assembly (26) as claimed in any one of the claims 6 to 8 wherein the actuator member (26) is a piezo-actuator.
  10. 10. Actuator assembly (26) as claimed in any one of the claims 6 to 8 wherein the actuator member (26) is a magneto restrictive actuator.
  11. 11. Servo piezo acting injector (10) wherein a cap nut (24) is tightened in order to fixedly maintained together the components of the body (16) of the injector, said injector body (16) enclosing an actuator assembly (26), as claimed in any one of the claims 7 to 11, compressed between a shoulder face (60) of the body and, the external spring (92) that abuts against a lower face of the body.
  12. 12. Servo piezo acting injector (10) as claimed in claim 11 wherein the actuator assembly (26) is as a claimed in the combination of claims 7 and 8.
  13. 13. Method of assembly (100) of a servo acting injector (10), the injector being as claimed in any one of the claims 9 to 12, the method (100) comprising the steps of: a) providing an uncompressed actuator assembly (26) as claimed in any one of the claims 6 to 8; b) inserting the uncompressed actuator assembly (26) in a bore (104) provided in the injector body, so that the actuator body (26) abuts against a shoulder face (62) provided at the end of the bore (104) and, the external spring (92) slightly protrudes outside the bore (104); c) arranging in place a control valve, a nozzle and a cap nut; d) tightening the cap nut so that the external spring is compressed, compressing the actuator member (28).
GB1510407.8A 2015-06-15 2015-06-15 Hydraulic lash adjuster arranged in a servo injector Withdrawn GB2539401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1510407.8A GB2539401A (en) 2015-06-15 2015-06-15 Hydraulic lash adjuster arranged in a servo injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1510407.8A GB2539401A (en) 2015-06-15 2015-06-15 Hydraulic lash adjuster arranged in a servo injector

Publications (2)

Publication Number Publication Date
GB201510407D0 GB201510407D0 (en) 2015-07-29
GB2539401A true GB2539401A (en) 2016-12-21

Family

ID=53784692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1510407.8A Withdrawn GB2539401A (en) 2015-06-15 2015-06-15 Hydraulic lash adjuster arranged in a servo injector

Country Status (1)

Country Link
GB (1) GB2539401A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6260541B1 (en) * 2000-04-26 2001-07-17 Delphi Technologies, Inc. Hydraulic lash adjuster
US20010032612A1 (en) * 1999-10-15 2001-10-25 Welch Alan B. Directly actuated injection valve
US20100006675A1 (en) * 2004-12-23 2010-01-14 Friedrich Boecking Fuel injector with direct control of the injection valve member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010032612A1 (en) * 1999-10-15 2001-10-25 Welch Alan B. Directly actuated injection valve
US6260541B1 (en) * 2000-04-26 2001-07-17 Delphi Technologies, Inc. Hydraulic lash adjuster
US20100006675A1 (en) * 2004-12-23 2010-01-14 Friedrich Boecking Fuel injector with direct control of the injection valve member

Also Published As

Publication number Publication date
GB201510407D0 (en) 2015-07-29

Similar Documents

Publication Publication Date Title
US20060239846A1 (en) High pressure pump having solenoid actuator
US6520423B1 (en) Hydraulic intensifier assembly for a piezoelectric actuated fuel injector
US9856843B2 (en) Fluid injector
US10995718B2 (en) High pressure diesel pump
CN110537014B (en) High-pressure fuel pump
EP2589790A1 (en) Plug assembly for high-pressure valve
JP5021731B2 (en) Fuel injector
GB2539401A (en) Hydraulic lash adjuster arranged in a servo injector
CN104769269A (en) Fuel injector comprising a piezoactuator
EP3274583B1 (en) Control valve arrangement
EP3376016A1 (en) Control valve of a fuel injector
US20160146170A1 (en) Internal combustion engine fuel, preferably diesel fuel, feed pump assembly
US9435309B2 (en) Fuel control valve
WO2018146246A1 (en) Fuel injector
US9341154B2 (en) Valve assembly for a fuel injector and fuel injector
EP3218594A1 (en) Hydraulic lash adjuster arranged in a servo injector
CN105508108B (en) Valve module and fluid ejector provided with guide element
US10094350B2 (en) Injection valve
CN108291510B (en) Fuel injector
KR102164183B1 (en) Integrated arrangement of a high-pressure valve and an injection ramp
US10400728B2 (en) Electromagnetically actuable intake valve for a high-pressure pump, and high-pressure pump
WO2015124340A1 (en) Fuel injector
EP3250812A1 (en) Servo injector
WO2019068566A1 (en) Fuel injector
WO2017064986A1 (en) Fuel injection device

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)