GB2286427A - Solenoid valve controlled high pressure i.c.engine fuel injector - Google Patents

Solenoid valve controlled high pressure i.c.engine fuel injector Download PDF

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Publication number
GB2286427A
GB2286427A GB9501661A GB9501661A GB2286427A GB 2286427 A GB2286427 A GB 2286427A GB 9501661 A GB9501661 A GB 9501661A GB 9501661 A GB9501661 A GB 9501661A GB 2286427 A GB2286427 A GB 2286427A
Authority
GB
United Kingdom
Prior art keywords
nozzle needle
injector
insert
solenoid valve
line
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
GB9501661A
Other versions
GB2286427B (en
GB9501661D0 (en
Inventor
Martin Hoppenstedt
Andreas Vortmeier
Gunter Kellermann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of GB9501661D0 publication Critical patent/GB9501661D0/en
Publication of GB2286427A publication Critical patent/GB2286427A/en
Application granted granted Critical
Publication of GB2286427B publication Critical patent/GB2286427B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided

Landscapes

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

Abstract

The invention relates to an injector with solenoid-valve control for an internal combustion engine, with an elongate insert which starts from a centrally located high-pressure connection, contains a fuel feed line, is surrounded by a solenoid valve, is coaxial with the nozzle needle and from which the fuel feed line leads, on the one hand, to a pressure space surrounding the nozzle needle and, on the other hand, to the rear side of the nozzle needle, the rear side of the nozzle needle being connectable to a relief line by the solenoid valve.

Description

A 2286427 1 Solenoid-valve-controlled injector for an internal combustion
engine The invention relates to a solenoid-valve-control led injector for an internal combustion engine.
EP 0 304 749 B1 has disclosed an injector of this kind in which, in the region of the nozzle, a pressure chamber surrounding the nozzle needle and a control chamber situated on the rear side of the nozzle needle are supplied under pressure with fuel which is fed in below the solenoid valve via a high-pressure connector mounted laterally on the injector. The solenoid valve has an axially movable control pin which controls a connection between the control chamber and a relief volume and thus controls injection.
An embodiment of this kind takes up a lot of installation space and the process of securing it in the cylinder head is complicated since it cannot be fixed in the receiving hole in the cylinder head by means of a union nut. A certain minimum height of the mounted injector is furthermore required to avoid making the installation of the connecting and injection lines more difficult.
The present invention seeks to provide an injector in which the installation space is minimized and the installation of the injector and access to this injector, including the fixing of the connecting lines, can be made easier.
According to the present invention there is provided a solenoid-valvecontrolled injector for an internal combustion engine, with a nozzle needle resting on a needle seat and a pressure chamber surrounding the nozzle needle, with a high-pressure connector and a fuel feed line via which fuel passes, on the one hand, into the pressure chamber and, on the other hand, to the rear side of the nozzle needle, the rear side of this nozzle needle being connectable to a relief line by means of a solenoid valve arranged in the injector, wherein a centrally extending elongate insert surrounded by the solenoid valve and 1 2 containing the fuel feed line is positionally fixed in the injector housing and the high-pressure connector is provided on the head end of the injector and is connected to the fuel feed line.
By virtue of the measures according to the invention, namely by virtue of the special arrangement of an insert which contains the fuel feed line and extends centrally in the injector housing and by virtue of the fact that the high-pressure connector is mounted on the head end of the injector, the injector can thus be fixed in a simple manner by being screwed into the cylinder head or by means of a union nut in the cylinder head. This considerably simplifies the installation of the connecting or injection lines - and likewise accessability.
By virtue of the special high-pressure connector, the injector can, furthermore, be made slim and rotationally symmetrical. In addition, the requirement for installation space is reduced.
Advantageous further developments of the invention are specified in the subclaims.
The invention is explained in greater detail below with reference to four different exemplary embodiments, shown in the drawing, in which:- Fig. 1 shows the injector according to the invention with a solenoid valve in the f orm of a two-way valve and with a control piston mounted between the insert and the nozzle needle, Fig. 2 shows an injector of similar construction in which, however, a filler piece is situated in between instead of a control piston, Fig. 2a shows a detail of the injector on an enlarged scale, Fig. 3 shows the injector according to the invention with a solenoid valve in the form of a three-way valve and with a control piston between the nozzle needle and the insert and Fig. 4 shows the injector with a filler piece 3 instead of the control piston.
An injector essentially comprises a fuel injection nozzle 2 and a solenoid valve 3 for controlling injection, the said solenoid valve being designed as a two-way valve according to Figs. 1 and 2 and consisting of a solenoidvalve winding 4 in the coil carrier 5 and of a sleeve-shaped magnet armature 6 with an internal collar 7. The magnet armature 6 is concentric with a sleeve-shaped counterpart 8, the outer collar 9 of which rests against the inner collar 7 and interacts with the latter. Between the magnet armature 6 and the counterpart 8 there is a compression spring 10 which is supported, on the one hand, against a fixed main body 11 and, on the other hand, against the outer collar 9 of the counter-part 8.
The counterpart 8 is guided in axially movable fashion on a slim and elongate insert 12 which is inserted f irmly and centrally in the main body 11 and is passed through by a fuel f eed line 13 which starts from a highpressure connector 14 provided for a connecting or injection line (not shown) and situated centrally at the head end, that is, the outer end, of the injector.
The insert 12 has a valve seat 15 for the longitudinally displaceable counterpart 8, by means of the control edge of which a connecting passage 16 extending in the insert 12 can be opened or closed at a radially extending passage section 16a.
In Fig. 1, the insert 12 and a control piston 18 interacting with a nozzle needle 17 of the fuel injection nozzle 2 delimit a control space 19 into which a restriction hole 20 connected to the fuel feed line 13 and a restriction hole 21 connected to the connecting passage 16 open. The restriction hole 21 can be arranged in a conical insert 22 which is fixed in position in a correspondingly designed recess 23 in the insert 12.
By means of the respective defined restriction arrangement, it is possible, on the one hand.. to influence the closing movement and, on the other hand, to influence 4 the opening movement of the nozzle needle 17. By virtue of the special position of the restriction holes 21, 22, the control space 19 is furthermore correspondingly small, making it possible to control the course of injection and the quantity injected more accurately.
Above the magnet armature 7 and the counterpart 9 there is a relief space 24 from which a low-pressure or relief line 25 leads away in an upright position.
The fuel feed line 13 and the connecting passage 16 run slightly at an angle in the insert 12 and of these the line 13 makes a transition in the lower area of the insert to an annular groove 13a, connected to which is the line section 13b, which extends in the main body 11, the intermediate piece 26 and the nozzle body 27 and which opens into a pressure chamber 28 surrounding the nozzle needle 17. Reference 29 denotes the needle seat, from which the nozzle needle 17 rises counter to a spring force and counter to the direction of flow when the pressure reduction in the control space 19 occurs.
Leak-off fuel coming from the nozzle needle 17 and the control piston 18 is guided past the armature of the solenoid valve 3 via a spring space 30 of the nozzle needle 17 and via a hole 31 extending in the main body 11 and into the relief space 24.
In the case of the injector 1 in accordance with Fig. 2, the insert 12 is of considerably smaller design in terms of its diameter and is surrounded in its upper region by a top fitting 33, while the lower region is stuck firmly in the main body 11 and is designed with an increased diameter to form a valve seat 15. The lower control edge of the counterpart 8 interacts here with the valve seat 15. Also situated in this region is the passage section 16a of the connecting passage 16, which has a defined restriction hole 21 opening into the passage section 16a. There is a further restriction hole 20 between the high-pressure line 36 connected to the control space 19 and the fuel feed line 13.
1 t 1 The control space 19 extends as f ar as the rear side of the nozzle needle 17. A filler piece 37 fixed in position in the main body 11 reduces the volume of the control space 19. The high-pressure connection to the rear side of the nozzle needle 17 is achieved by means of a connecting groove 39 in the main body 11 and by means of a spring cup 38 of slotted design which rests on the nozzle needle 17 with assistance from a spring force.
The connection for the low-pressure or relief line 25 can be provided at the side at the upper end of the injector 1, the line 25 initially taking an arcuate course and then an upright course.
The injector in accordance with Figs. 3 and 4, which is of largely similar design, contains a solenoid valve 3 designed as a three-way valve.
At its upper and lower ends, the counterpart 8, which can be moved axially on the insert 12 counter to spring force, has respective control edges 8a, 8b, control edge 8a interacting with the conical valve seat 15 of the insert 11 to control the high-pressure connection and control edge 8b interacting with the conical valve seat 41 on the coil carrier 5 to control the relief connection.
In the case of the embodiment in accordance with Fig. 3, the control piston 18 delimits the control space 19, which is connected continuously to the spring space 32 of the solenoid valve 3 by a sloping connecting passage 16. A high-pressure line 36 branching off transversely from the fuel feed line 13 is opened and closed by the control edge 8a of the counterpart. Provided in the outer collar 9 of the counterpart 8 is a through hole 42 through which the spring space 32 is connected to the lowpressure line 25 via an annular interspace 43, formed by the insert 12 and the coil carrier 5, when the solenoid valve 40 is activated (Figs. 3, 4).
Leak-off fuel is here taken off via the spring space 30 of the nozzle needle 17, via the hole 31 in the main body 11, via a hole 44 in an intermediate piece 45, via a space 6 46 for the solenoid-valve windings 4 and a passage 47 opening into the low-pressure line 25.
The embodiment in accordance with Fig. 4 dif f ers from that according to Fig. 3 in that the control piston 18 is replaced by the axially secured filler piece 37 and the control space 19 thus extends via the connecting groove 39 as far as the rear side of the nozzle needle 17. Leak-of f lines are not necessary in this embodiment.
The mode of operation of the injectors in accordance with Pigs. 1 and 2 is as follows: fuel delivered passes via the central high-pressure connector 14 and the fuel f eed line 13 both into the pressure space 28 surrounding the nozzle needle 17 and to the rear side of the nozzle needle 17. The nozzle needle is pressed onto its needle seat 29 by spring force and by the force of the pressure in the control space 19. As soon as the solenoid valve 3 or two-way valve is activated, the counterpart 8 is moved into an open position by the attracted magnet armature 6, i.e. the rear side of the nozzle needle or of the control piston is relieved of pressure and the nozzle needle 17 is raised f rom its needle seat 29 due to the higher pressure in the pressure space 28.
The mode of operation of the injectors in accordance with Figs. 3 and 4 is as follows: fuel delivered passes via the central high-pressure connector 14 and the fuel f eed line 13 into the pressure space 28 and to the rear side of the nozzle needle 17. The solenoid valve 40, in the form of a three-way valve, controls both the high-pressure and the low- pressure connection. In the illustrated position of the counterpart 8, the high-pressure connection is open while the low-pressure connection is interrupted. with the solenoid valve energized, the high-pressure connection leading to the rear side of the nozzle needle is interrupted and the rear side of the nozzle needle is connected to the low-pressure side. The control edge 8a of the counterpart 8 rests on the valve seat 15 and the control edge 8b is raised from its valve seat 41.
4 -1 I, 1 7

Claims (10)

  1. Claims
    A solenoid-valve-control led injector for an internal combustion engine, with a nozzle needle resting on a needle seat and a pressure chamber surrounding the nozzle needle, with a high-pressure connector and a fuel f eed line via which fuel passes, on the one hand, into the pressure chamber and, on the other hand, to the rear side of the nozzle needle, the rear side of this nozzle needle being connectable to a relief line by means of a solenoid valve arranged in the injector, wherein a centrally extending elongate insert surrounded by the solenoid valve and containing the fuel feed line is positionally fixed in the injector housing and the high-pressure connector is provided on the head end of the injector and is connected to the fuel feed line.
  2. 2. An injector according to Claim 1, wherein the solenoid valve has a sleeve-shaped magnet armature which interacts with a spring-loaded annular counterpart which is displaceable axially on the insert and controls at least the volume flow from the control space into the relief line.
  3. 3. An injector according to Claim 1, wherein the insert alone or both the insert and the injector housing form a valve seat for the annular counterpart.
  4. An injector according to any one of the preceding claims, wherein extending in the insert is a connecting passage which starts from a control space and by means of which the rear side of the nozzle needle can be connected to the relief line in the working position of the annular counterpart with the solenoid valve activated.
  5. 5. An injector according to any one of Claims 1 to 4, wherein the solenoid valve comprises a two-way valve, the counterpart of which, which rests against the magnet armature by virtue of spring force, opens the connecting 41 8 passage, which has a defined restriction hole and interacts with the relief line.
  6. 6. An injector according to any one of Claims 1 to 5, wherein the connecting passage is connected continuously to a defined restriction hole which branches off from the fuel feed line and opens into the control space.
  7. 7. An injector according to any one of Claims 1 to 4, wherein the solenoid valve comprises a three-way valve, the counterpart of which, which rests against the magnet armature by virtue of spring f orce, connects, by its end f acing the injection nozzle the connecting passage to a high-pressure line branching of f from the fuel feed line and opening into a spring space formed by the magnet armature and the counterpart and, at the same time, interrupts with its end remote from the injection nozzle the connection between the connecting passage and the relief line.
  8. 8. An injector according to any one of the preceding claims, wherein a control piston interacting with the nozzle needle, and the insert delimit the control space with their respective end faces and wherein a spring space surrounding the control piston at the rear side of the nozzle needle is connected to the relief line via a leakage-oil line.
  9. 9. An injector according to any one of the preceding claims, wherein a rod-shaped filler piece is provided between the insert and the rear side of the nozzle needle, the control space extending beyond the length of this filler piece f rom the insert, via a connecting groove, as f ar as the nozzle needle.
  10. 10. A solenoid-valve-controlled fuel injector for an internal combustion engine, substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB9501661A 1994-02-09 1995-01-27 Solenoid-valve-controlled injector for an internal combustion engine Expired - Fee Related GB2286427B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4404050A DE4404050C1 (en) 1994-02-09 1994-02-09 Injector with solenoid-valve control for an internal combustion engine

Publications (3)

Publication Number Publication Date
GB9501661D0 GB9501661D0 (en) 1995-03-15
GB2286427A true GB2286427A (en) 1995-08-16
GB2286427B GB2286427B (en) 1997-05-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9501661A Expired - Fee Related GB2286427B (en) 1994-02-09 1995-01-27 Solenoid-valve-controlled injector for an internal combustion engine

Country Status (4)

Country Link
DE (1) DE4404050C1 (en)
FR (1) FR2715974B1 (en)
GB (1) GB2286427B (en)
IT (1) IT1277145B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308590C (en) * 2001-05-16 2007-04-04 罗伯特·博施有限公司 Fuel injection valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516245C2 (en) * 1995-05-03 2002-12-05 Daimler Chrysler Ag Method for controlling a multi-phase injection of a direct injection diesel engine
DE19519192C1 (en) * 1995-05-24 1996-06-05 Siemens Ag Injector
FR2756595B1 (en) * 1996-12-02 1999-02-12 Froment Jean Louis OPENING SLOWDOWN AND LEAKAGE REDUCTION DEVICE FOR CONSTANT PRESSURE INJECTION SYSTEMS USED ON DIESEL ENGINES
US5975437A (en) * 1997-11-03 1999-11-02 Caterpillar, Inc. Fuel injector solenoid utilizing an apertured armature
DE102008040454A1 (en) * 2008-07-16 2010-01-21 Robert Bosch Gmbh Fuel injection valve device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219694A (en) * 1968-07-31 1971-01-20 Sulzer Ag Fuel injection valves for internal combustion engines
GB1465283A (en) * 1970-10-07 1977-02-23 Hitachi Ltd Fuel injectors for internal combustion engines
EP0427266A1 (en) * 1989-11-09 1991-05-15 Yamaha Hatsudoki Kabushiki Kaisha High pressure fuel injection unit
EP0615064A1 (en) * 1993-03-08 1994-09-14 Ganser-Hydromag Injection valve control system for internal combustion engines

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2068857A5 (en) * 1969-10-24 1971-09-03 Sofredi
IT212432Z2 (en) * 1987-08-25 1989-07-04 Weber Srl ELECTROMAGNETICALLY OPERATED FUEL INJECTION VALVE FOR DIESEL CYCLE ENGINES
EP0571003B1 (en) * 1987-12-02 1997-07-16 Ganser-Hydromag Ag Electromagnetically operated device for the rapid switch-over of electro-hydraulically actuated fuel injectors
JP2712760B2 (en) * 1990-05-29 1998-02-16 トヨタ自動車株式会社 Fuel injection valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219694A (en) * 1968-07-31 1971-01-20 Sulzer Ag Fuel injection valves for internal combustion engines
GB1465283A (en) * 1970-10-07 1977-02-23 Hitachi Ltd Fuel injectors for internal combustion engines
EP0427266A1 (en) * 1989-11-09 1991-05-15 Yamaha Hatsudoki Kabushiki Kaisha High pressure fuel injection unit
EP0615064A1 (en) * 1993-03-08 1994-09-14 Ganser-Hydromag Injection valve control system for internal combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308590C (en) * 2001-05-16 2007-04-04 罗伯特·博施有限公司 Fuel injection valve

Also Published As

Publication number Publication date
FR2715974B1 (en) 1998-02-06
ITRM950033A1 (en) 1996-07-18
ITRM950033A0 (en) 1995-01-18
GB2286427B (en) 1997-05-28
IT1277145B1 (en) 1997-11-04
DE4404050C1 (en) 1994-12-01
GB9501661D0 (en) 1995-03-15
FR2715974A1 (en) 1995-08-11

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010127