DE19742943C1 - Coupling device between actuator and valve setting element - Google Patents

Coupling device between actuator and valve setting element

Info

Publication number
DE19742943C1
DE19742943C1 DE1997142943 DE19742943A DE19742943C1 DE 19742943 C1 DE19742943 C1 DE 19742943C1 DE 1997142943 DE1997142943 DE 1997142943 DE 19742943 A DE19742943 A DE 19742943A DE 19742943 C1 DE19742943 C1 DE 19742943C1
Authority
DE
Germany
Prior art keywords
actuator
actuator piston
rotation
axis
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.)
Expired - Fee Related
Application number
DE1997142943
Other languages
German (de)
Inventor
Heinz Lixl
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.)
Continental Automotive GmbH
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to DE1997142943 priority Critical patent/DE19742943C1/en
Application granted granted Critical
Publication of DE19742943C1 publication Critical patent/DE19742943C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other 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
    • F02M63/0012Valves
    • F02M63/0014Valves characterised by the valve actuating means
    • F02M63/0015Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02Fuel-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
    • F02M47/027Electrically actuated valves draining the chamber to release the closing pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/701Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical

Abstract

The coupling device uses a coupling element (2) between the actuator piston (1) and the setting element (3), for providing a locked coupling in the movement direction of the actuator piston. The coupling element is rotatable about a centre axis (7) and is shaped so that its diameter increases in dependence on its rotation angle in a given rotation direction in which it is rotated by an applied torque, provided by a spring element (11).

Description

The invention relates to a device in an injection valve for holding a positive connection according to the preamble of the patent claim 1.

Form-fitting connections are, for example, between an actuator piston and an actuator used to the Ak Reliable positive locking of the door piston with the actuator connect even though the distance between the actuator piston and changed the actuator. The device can, for example find application in an injection valve.

From DE 195 19 191 C2 an injection valve is known, the egg NEN actuator piston (primary piston), which is from a Tel spring is pressed against the actuator and via a spiral spring and a secondary piston presses on a plunger. gpress. Due to the spring force of the disc spring and the spi ralfeder becomes a play-free active connection between the Ak goal and the plunger.

From EP 0 431 272 A2 an injection valve is known, the one Has actuator for controlling a nozzle needle, wherein the nozzle needle to an annular collar of the nozzle sennadel ge from a pair of tellefeder against the actuator is pressed, so the game between the nozzle needle and the actuator reduce limb.

The object of the invention is an automatic Provide game compensation that is simple and inexpensive is stig.

The object of the invention is achieved by the features of the patent claim 1 solved. A major advantage of the invention is based on the fact that a connecting element is provided which  a difference depending on the angular position Chen diameter and means are also provided which the connecting element in the direction of rotation in which the Diameter increases, apply a torque.

Further advantageous training and improvements to the Er invention are specified in the dependent claims.

The invention is explained in more detail below with reference to the figures purifies: show it

Fig. 1 shows a part-making element of an injection valve with a Verbin,

Fig. 2 shows the arrangement of FIG. 1 in cross section, and

Fig. 3 mentes the diameter of the connecting element depending on the angular position of the Verbindungsele.

Fig. 1 shows the example of an injection valve, the Vorrich device for holding a positive connection. Only those parts of the injection valve are shown that are important for understanding the invention. An Ak torkolben 1 is provided, which is positively connected to an actuator 3 via a connecting element 2 . The actuator piston 1 and the actuator 3 are guided in a movement axis by the housing 16 of the injection valve. The end of the actuator 3 merges into a mandrel 17 which rests on a spherical closing element 4 . The closing member 4 is assigned to a valve seat 5 . The closing member 4 closes a pressure chamber 6 against the outflow of fuel, which is formed in the housing 16 . The pressure chamber 6 is supplied with fuel at a high pressure via an inlet and the fuel pressure is applied, for. B. a control piston which is connected to a valve needle that opens or closes the injectors depending on the pressure in the pressure chamber. The closing member 4 and the valve seat 5 represent a Servoven valve with which the pressure in the pressure chamber 6 is adjustable. The actuator piston 1 is connected to a controllable piezoelectric actuator 30 which is connected to the housing 16 . With a corresponding control of the actuator 30 , the actuator piston 1 is moved up or down.

The connecting element 2 has essentially the shape of a disc which is arranged perpendicular to the direction of movement of the actuator piston 1 . The connecting element has a central bore 15 through which a bearing axis 14 is guided. The bearing axis 14 is supported on the actuator piston 1 with both ends. The connecting element 2 is at least partially introduced into a slot-shaped recess 9 of the actuator piston 1 . The connecting element 2 has a stop area 10 which is arranged on the outer edge of the disk shape. The stop area 10 has a receiving bore into which a spring element 11 is inserted, which is clamped between the actuator piston 1 and the stop area 10 . The spring element 11 bears against a support region 12 of the actuator piston 1 . The center of gravity 8 of the connecting element 2 is located outside the axis of rotation 7 between the axis of rotation 7 and the stop area 10. The center of gravity 8 is at a first distance 13 from the axis of rotation 7 , the first position 13 being indicated in the vertical direction to the axis of rotation 7 . In a simple embodiment, the center of gravity 8 is arranged in the axis of rotation 7 .

Fig. 1 shows the connecting element 2 in a Seitenan view, which is essentially designed as a turntable with a spiral diameter. The acting between the actuator piston 1 and the actuator 3 diameter of the Verbindungsele element 2 increases with a left turn of the Verbindungselemen tes 2 and increases with a right turn. The effective radius r of the connecting element between the actuator piston 1 and the actuator 3 is determined by the following formula:

r (ϕ) = ro + (ϕ / 2π). Δr,

where with ϕ the angle of rotation, with ro an initial radius and with Δr is a constant.

Fig. 2 shows the arrangement of FIG. 1 in cross section AA. The bearing of the connecting element 2 with the bearing axis 14 can be clearly seen. The connecting element 2 is arranged perpendicular to the direction of movement of the actuator piston 1 in the recess 9 . The recess 9 leads in the lateral direction, the connecting element 2 , so that the Verbindungsele element 2 is essentially rotatable only about the axis of rotation 7 . The movement of the actuator 3 in the direction of the Aktorkol ben 1 is limited by a stop 18 which is formed on the housing 16 .

The central bore 15 of the connecting element 2 has a larger diameter than the cylindrical bearing axis 14. This ensures that there is sufficient play to rotate the connecting element 2 when the actuator piston 1 is not pressed in the direction of the actuator 3 . In addition, this ensures that, under pressure loading, the actuator piston 1 rests with a bearing surface 19 on the connecting element 2 and the connecting element rests on a second bearing surface 20 of the actuator 3 . In this way, a direct and positive connection between the actuator piston 1 and the actuator 3 is achieved with egg ner movement in the direction of the valve seat 5 .

.. The operation of the arrangement according to Figures 1 and 2 is as follows: If the actuator is energized 30, then the Ak expands gate 30 and the actuator piston 1 is pushed downward in the direction of the actuator 3. In this case, a direct and positive connection is established between the actuator piston 1 and the actuator 3 via the connecting element 2 . The actuator 3 presses against the closing member 4 , which is pressurized by the fuel in the pressure chamber 6 in the direction of the actuator 3 . If the actuator 1 is now moved downward, the mandrel 17 of the actuator 3 pushes the closing member 4 away from the valve seat 5 and the pressure chamber 6 is connected to a drainage region 21 which surrounds the mandrel 17 .

If the energization of the actuator 30 is then switched off, the actuator 30 contracts and the actuator piston 1 is moved back upwards. The fuel in the pressure chamber 6 under pressure presses the closing element 4 in the direction of the valve seat 5 and thus the actuator 3 upwards in the direction of the actuator piston 1 , the movement of the actuator 3 being limited by the stop 18 upwards. During this relief movement, the actuator piston 1 is moved so far upwards that the positive connection to the actuator 3 is lost and the connecting element 2 is now freely rotatable about the axis of rotation 7 . In this position, he produces the spring element 11 a first torque D1, which pushes the stop area 10 down, so that the connection element 2 performs a right turn about the axis of rotation 7 . The effective diameter of the connecting element 2 in the axis of symmetry 22 , which is arranged vertically and centrally between the actuator piston 1 and the actuator 3 , is increased ver.

Now, if the actuator piston 1 in the upward movement is braked at the home position, then acts in a exzentri's center of gravity 8 is an inertial force at the center of gravity 8 of the connecting element 2, which generates a second torque D2 at the center of gravity 8, directed towards a left turn is. The connecting member 2 and the center of gravity 8 are chosen such that the second torque is larger than he ste torque, so that the connecting member is displaced in a left rotation 2 so that the effective diameter of the connecting element 2 on the axis of symmetry 22 between the actuator piston 1 and the actuator 3 is reduced. Since the connecting element 2 is relieved and is rotated about the axis of rotation 7 . The actuator piston 1 and the actuator 3 are now in their starting positions and are not positively connected to one another. After the second torque has decayed, the spring element 11 now rotates the connecting element 2 in a clockwise rotation about the axis of rotation 7 until the actuator piston 1 is connected to the actuator 3 in a form-fitting manner via the connecting element 2 . In this way it is ensured that the connecting selement 2 starting position with each movement of the actuator piston 1 in the off on the current distance between the actuator piston 1 and the actuator 3 automatically adjusted.

Fig. 3 shows over the angle of rotation ϕ plotted the effekti ven diameter of the connecting element 2 , which is present on the symmetry axis 22 . Now, if the actuator piston 1 moves up and braked at the home position, the inertia force acting on the center of gravity 8, the connecting element 2 in a left turn is set on the basis. The effective diameter of the connecting element 2 , which acts between the actuator piston 1 and the actuator 3, is reduced ver. This corresponds in Fig. 3 the transition from the position P1 to position P2. After braking, the spring force acts on the spring element 11 , so that the connecting element 2 is rotated clockwise until there is again a positive connection between the actuator piston 1 and the actuator 3 through the connecting element 2 . This corresponds to the transition from position P2 to position P3 in FIG. 3. The distance between the actuator piston 1 and the actuator 3 can change due to aging or wear, so that the position P1 does not have to correspond to the position P3. The device according to the invention enables mechanical and automatic play compensation between the actuator piston 1 and the actuator 3.

Claims (8)

1. Device in an injection valve for holding a positive connection between an actuator piston ( 1 ) and an actuator ( 3 ), a connecting element ( 2 ) being seen between the actuator piston ( 1 ) and the actuator ( 3 ), which is at least in one Direction of movement of the actuator piston ( 1 ) holds a positive connection between the actuator piston ( 1 ) and the actuator ( 3 ), characterized in that
  • 1. that the connecting element ( 2 ) is rotatably mounted about an axis of rotation ( 7 ),
  • 2. that the connecting element ( 2 ) is shaped such that the diameter of the connecting element ( 2 ) during a rotation about the axis of rotation ( 7 ) in a direction of rotation with increasing angle of rotation on the connecting axis ( 22 ) between the Ak torkolben ( 1 ) and the Actuator ( 3 ) increases,
  • 3. that mechanical means ( 11 ) are provided which act on the connecting element in the direction of rotation with the increasing diameter with a first torque (D1).
2. Device according to claim 1, characterized in that means ( 8 ) are provided which act upon the movement of the actuator piston ( 1 ) in a starting position, the connecting element ( 2 ) in the direction of rotation with decreasing diameter with a second torque (D2) .
3. Apparatus according to claim 1, characterized in that the connecting element ( 2 ) is designed as a turntable, that the turntable is arranged substantially perpendicularly between the actuator piston ( 1 ) and the actuator ( 3 ) that the turntable ( 1 ) around The axis of rotation ( 7 ) is rotatably mounted on the actuator piston, which is arranged substantially perpendicular to the direction of movement of the actuator piston ( 1 ).
4. The device according to claim 1, characterized in that a spring element ( 11 ) is provided as mechanical means, and that the spring element ( 11 ) is clamped between the actuator piston ( 1 ) and the connecting element ( 2 ).
5. The device according to claim 1, characterized in that the center of gravity ( 8 ) of the connecting element ( 2 ) between the axis of rotation ( 7 ) of the connecting element ( 2 ) and the attack point ( 10 ) of the first torque (D1) is arranged.
6. The device according to claim 1, characterized in that the mass of the connecting element ( 2 ) and the distance of the center of gravity ( 8 ) from the axis of rotation ( 7 ) are set such that the second torque (D2) on the connection element ( 2 ) when decelerating the actuator piston ( 1 ) in the starting position, is greater than the first torque (D1).
7. The device according to claim 1, characterized in that the actuator piston ( 1 ) is arranged in an injection valve, and that the actuator piston ( 1 ) is connected to a controllable piezoelectric actuator ( 30 ).
8. The device according to claim 7, characterized in that the actuator ( 3 ) is assigned a closing member ( 4 ) of a servo valve which controls a connection cross section between egg ner pressure chamber ( 6 ) and a drain ( 21 ).
DE1997142943 1997-09-29 1997-09-29 Coupling device between actuator and valve setting element Expired - Fee Related DE19742943C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997142943 DE19742943C1 (en) 1997-09-29 1997-09-29 Coupling device between actuator and valve setting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997142943 DE19742943C1 (en) 1997-09-29 1997-09-29 Coupling device between actuator and valve setting element

Publications (1)

Publication Number Publication Date
DE19742943C1 true DE19742943C1 (en) 1999-04-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997142943 Expired - Fee Related DE19742943C1 (en) 1997-09-29 1997-09-29 Coupling device between actuator and valve setting element

Country Status (1)

Country Link
DE (1) DE19742943C1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921242C1 (en) * 1999-05-07 2000-10-26 Siemens Ag Method of positioning control drive in common rail fuel injector for motor vehicle internal combustion engine
WO2001023743A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
WO2001023741A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
DE10129375A1 (en) * 2001-06-20 2003-01-02 Mtu Friedrichshafen Gmbh Injector with piezo actuator
DE102008037788A1 (en) * 2008-08-14 2010-02-25 Continental Automotive Gmbh Compensation device for use in injection valve, comprises housing, which has housing recess and two compensation bodies, where compensation bodies comprise two opposite sides
DE102006018026B4 (en) * 2006-04-19 2014-08-14 Robert Bosch Gmbh Fuel injector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431272A2 (en) * 1989-11-03 1991-06-12 MAN Nutzfahrzeuge Aktiengesellschaft Method and device to inject fuel in the combustion chamber of an internal combustion engine
DE19519191C2 (en) * 1995-05-24 1997-04-10 Siemens Ag Injector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0431272A2 (en) * 1989-11-03 1991-06-12 MAN Nutzfahrzeuge Aktiengesellschaft Method and device to inject fuel in the combustion chamber of an internal combustion engine
DE19519191C2 (en) * 1995-05-24 1997-04-10 Siemens Ag Injector

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921242C1 (en) * 1999-05-07 2000-10-26 Siemens Ag Method of positioning control drive in common rail fuel injector for motor vehicle internal combustion engine
US8720852B2 (en) 1999-05-07 2014-05-13 Continental Automotive Gmbh Procedure for positioning the actuating drive in a fuel injector and device for performing the procedure
US7310986B2 (en) 1999-05-07 2007-12-25 Siemens Aktiengesellschaft Method for producing a compensation collar for an injection valve
WO2001023741A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
WO2001023743A1 (en) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Valve for controlling fluids
DE10129375A1 (en) * 2001-06-20 2003-01-02 Mtu Friedrichshafen Gmbh Injector with piezo actuator
DE10129375B4 (en) * 2001-06-20 2005-10-06 Mtu Friedrichshafen Gmbh Injector with piezo actuator
DE102006018026B4 (en) * 2006-04-19 2014-08-14 Robert Bosch Gmbh Fuel injector
DE102008037788A1 (en) * 2008-08-14 2010-02-25 Continental Automotive Gmbh Compensation device for use in injection valve, comprises housing, which has housing recess and two compensation bodies, where compensation bodies comprise two opposite sides

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20140401