EP0970295A1 - Electromagnetic drive mechanism - Google Patents
Electromagnetic drive mechanismInfo
- Publication number
- EP0970295A1 EP0970295A1 EP98917064A EP98917064A EP0970295A1 EP 0970295 A1 EP0970295 A1 EP 0970295A1 EP 98917064 A EP98917064 A EP 98917064A EP 98917064 A EP98917064 A EP 98917064A EP 0970295 A1 EP0970295 A1 EP 0970295A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnetic drive
- drive according
- valve
- armature
- box
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/14—Pivoting armatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
- F01L2009/2105—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids comprising two or more coils
- F01L2009/2109—The armature being articulated perpendicularly to the coils axes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F2007/1692—Electromagnets or actuators with two coils
Definitions
- the invention relates to an electromagnetic drive with the features of the preamble of claim 1.
- a drive with the features of the preamble of claim 1 is, for. B. from EP 00 43 42 6 Bl known.
- a problem with such drives, especially when used to drive valves in internal combustion engines, is the heat dissipation from the solenoids. It is known to solve this problem by complex water or oil flushing.
- the known solutions show unresolved problems, such as. B. closed assembly unit with electrical connection and adjustment of the magnet systems to the residual air gap.
- the invention is based on the object of storing the anchor with as little friction as possible and of creating an assembly-friendly arrangement.
- the invention provides a pre-testable unit which can be used as a standard, modular assembly module when used for valve actuation for many engine types.
- the invention is inexpensive to combine two drives into one structural unit. If these two drives are mounted on a common base body, the problem of heat dissipation can be solved well by embedding the coils in the base body. You can create a fully testable unit that is connected to the outside via a common connector.
- the torsion spring can be long because the entire width of the unit can be used.
- the torsion spring with valve actuation and anchor can be preassembled with a carrier plate. A good adjustment of the magnet system is possible while eliminating all tolerances, especially when a mechanical locking system is used that holds the armature in the end positions without electromagnet excitation and the locking positions are used as reference positions.
- the magnets can be adjusted and solidified with respect to the residual air gap by means of screws or rivets on the magnet armature.
- the subclaims also contain refinements of the invention.
- FIG. 1 is a side view of a base body with two drives attached to it, including a driven valve,
- a basic body is designated by 1 in FIG. In the illustration in FIG. 1, essentially only one drive can be seen. The second is behind.
- the visible drive has two electromagnets 2 and 3, the yokes of which are connected to the base body by screws 4.
- the windings of the electromagnets 2 and 3 are only shown schematically here for the sake of simplicity.
- the base body 1 is fastened by means of screws 5 to a box 1 a, which in turn is fastened to the cylinder block 20 by means of screws 5 a.
- an armature 10 is provided, which by a torsion spring z.
- B. a torsion bar 6 is movably mounted.
- the torsion bar 6 and the corresponding torsion bar 7 for the armature of the other drive are shown in perspective for clarity. You are embedded in the body, clamped on one side in this (the torsion bar 6 at 8) and at the other end, for. B. stored by means of a needle bearing.
- An anchor lever 9 is the connecting element between torsion bar 6 and anchor 10.
- a locking system is provided at the top right, which consists of a rocker 12 which can be tilted about an axis 11, a locking magnet 13, a spring 14 and a ball-bearing locking roller 15 which snaps over or under the anchor in the end positions of the armature and into the armature Holds end positions.
- the locking roller will be discussed again later.
- a non-visible junction box for a plug can be provided in the base body.
- the armature 10 actuates a valve 18 against the force of a spring 19 via an actuating rod 16 and an adjusting screw 17.
- the length of the actuating rod 16 can be changed by means of the adjusting screw 17. It is used to adjust the valve clearance in the position of the armature shown in broken lines and then closed valve 18.
- the spring 19 and the pretension of the torsion bar 6 form the spring forces which bring the armature into the intermediate position without excitation of an electromagnet.
- 1 shows dimensions II for the valve length, 12 for the valve block thickness, 13 for the distance of the axis of the torsion bar 6 from the valve block and 14 for the length of the actuating rod 16.
- the materials, i.e. H. the thermal expansion coefficients of the valve block 20, the valve 18, the actuating rod 16 and the box la are now selected and matched taking into account the lengths II to 14 so that when the valve 18 is closed, only a small valve clearance occurs despite different temperatures.
- FIG. 2 which differs only slightly from FIG. 1, the same parts are designated by the same reference numerals.
- the rest system is missing here; the adjusting screw 17 is connected to the valve stem 18 by means of a valve spring 21.
- This spring is an overstroke spring that can compensate to a certain extent for different paths of the armature and the valve.
- the above-mentioned junction box 22 is recorded here.
- the restoring force of the system is handled here in both directions by the torsion spring.
- FIG. 3 shows a height adjustment possibility of the drive together with the spring bearing relative to the box 1a or the cylinder block, it consists of a screw 30 and a plate spring 31.
- the height adjustment option is used to adjust the valve clearance.
- the base body 1 is pressed more or less strongly against the plate springs 31 by turning the nut 30a of the screw 30 and the distance 13 (FIG. 1) thus varies.
- both the above-mentioned screw mechanism (30, 30a) can be used, as well as a construction in which the magnet, in accordance with the armature construction, is rotatably supported on one side by means of a lever and can be rotated about an axis. By turning this axis, the residual air gap and valve clearance can be adjusted, since the relative distance between the poles of the opposing magnet yokes changes.
- the magnet is adjusted, for example, against spring tension using an eccentric cam or a screw mechanism.
- counter elements are advantageously provided which secure the cam or screw elements.
- the base body 4 shows a structural unit with two drives for two valves 58a and 58b in a view rotated by 90 (compared to FIGS. 1 to 3).
- the base body is designated by 41, which is not shown by the screws 45 (corresponding to FIG. 5)
- the base body 41 carries two support plates 42 and 43, to each of which a torsion bar 46 and 47 is fastened, the support plates can be fastened to the base body 41 by rivets or screws Connection can be effected, for example a square connected to the torsion bar or a toothing in the support plate can be shrunk in.
- a weld, for example laser welding, can also be used a metal bushing can be shrunk into the armature lever.
- the support bearings 50 can also be seen here for the free ends of the torsion bars 46 and 47, which are designed in particular as needle bearings.
- the valves 58 are also here Coupling spring coupled.
- a threaded nut 59 and a spindle 60 are used for valve adjustment.
- the actuating rods 60 of two adjacent drives can act on a valve stem 61 (FIG. 5).
- FIG. 6 shows a cylinder 7 of an internal combustion engine, the piston 72 of which is currently in the upper position.
- An intake valve 73 and an exhaust valve 74 are shown, which are guided in the cylinder head 75.
- Valves 73 and 74 are driven by electromagnetic drives housed in boxes 76 and 77. These are screwed onto the cylinder head 75 by screws, not shown.
- the drives have two electromagnets and an armature mounted on a torsion bar via a connecting part.
- the torsion bar is dimensioned such that the armature adjusts to an intermediate position without actuating an electromagnet.
- An actuating rod 78 or 79 is fastened to the connecting part and is connected to the valve stem 73 or 74 via an overtravel spring 80 or 81.
- the overtravel springs 80 and 81 normally represent a rigid coupling of the valve stem to the actuating rod 78 and 79, respectively. The spring action only occurs if the 7-arm executes a larger stroke than the valve can take
- the actuating rod including the overtravel spring protrude from the box floor here.
- the parts will preferably not protrude from the box.
- the connection between the overtravel spring and the valve stem is detachable: for example, the overtravel springs 80 and 81 have a slot which is inserted into a groove in the valve stem during assembly.
- the actuating rod 78 or 79 is preferably made of aluminum.
- At 82 is one Designated spark plug. This could also be housed in one of the boxes.
- a common cover 83 is provided for the two boxes 76 and 77, into which the suction pipe 84 of the cylinder 71 is integrated.
- the electronics 85 of the drive unit, for. B. also fixed for several drives. It is thermally insulated from the actual drive by thermal insulation 86. Heatsinks 87 of the electronics protrude into the intake manifold and are thus optimally cooled by the relatively cool intake air.
- Cover 83 and electronics 84 and heat sink 87 can be fastened by a common screw 88.
- An openable and closable flap 79 can be integrated in the cover 83 in order to alternately enable resonance suction tube or oscillating suction tube operation.
- the torsion bar 90 is shown in the box 91.
- An armature 93 of an electromagnet is shown on the torsion bar via a connecting part 92 and can be moved up and down by two magnets, not shown.
- the screws 94 are also shown, with which the box 91 is fastened to the cylinder head.
- the actuating rod 95 (corresponds to 16 in FIG. 1) is not visible attached to the connecting part 92.
- the carrier 96 which is part of a stroke sensor 97 (e.g. Hall sensor), is also attached to it.
- FIG. 7 also shows a centering part 98 and a housing centering 99 in the cylinder block. This ensures that the valve coupling is centered by means of the overstroke nut and engages in the valve.
- a locking device 100 is also provided here, which can be rotated about point 101. It serves as an assembly aid. The seal 102 between the box and the lid can also be seen here. y
- the electrical connection (contacting) of the magnetic coils with the electronics is very easy to carry out with this arrangement of the electronics, since all contacts can be connected to the circuit board.
- the stroke sensors can also be accommodated in the electronics (on the circuit board).
- the possible placement of the spark plugs in the box means “dry” placement, which reduces the amount of insulation and the ignition energy required.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712055 | 1997-03-24 | ||
DE19712056 | 1997-03-24 | ||
DE19712055A DE19712055A1 (en) | 1997-03-24 | 1997-03-24 | Solenoid-driven valve for internal combustion engine |
DE19712056A DE19712056A1 (en) | 1997-03-24 | 1997-03-24 | Electro-magnetic drive for valve activation of combustion engine |
DE19741571A DE19741571A1 (en) | 1997-09-20 | 1997-09-20 | Electromagnetic valve unit for I.C. engine |
DE19741571 | 1997-09-20 | ||
PCT/EP1998/001709 WO1998042957A1 (en) | 1997-03-24 | 1998-03-24 | Electromagnetic drive mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0970295A1 true EP0970295A1 (en) | 2000-01-12 |
EP0970295B1 EP0970295B1 (en) | 2001-06-20 |
Family
ID=27217240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98917064A Expired - Lifetime EP0970295B1 (en) | 1997-03-24 | 1998-03-24 | Electromagnetic drive mechanism |
Country Status (4)
Country | Link |
---|---|
US (1) | US6262498B1 (en) |
EP (1) | EP0970295B1 (en) |
DE (1) | DE59800892D1 (en) |
WO (1) | WO1998042957A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6997433B2 (en) | 2004-01-21 | 2006-02-14 | Ford Global Technologies, Llc | Electronic valve actuator having vibration cancellation |
US7314026B2 (en) | 2004-01-21 | 2008-01-01 | Ford Global Technologies, Llc | Electronic valve actuator having hydraulic displacement amplifier |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19837837C1 (en) * | 1998-08-20 | 2000-01-05 | Daimler Chrysler Ag | I.c. engine gas changing valve operating device with electromagnetic actuator |
WO2000029723A1 (en) * | 1998-11-16 | 2000-05-25 | Heinz Leiber | Electromagnetic drive |
IT1310488B1 (en) | 1999-09-23 | 2002-02-18 | Magneti Marelli Spa | ELECTROMAGNETIC ACTUATOR FOR THE CONTROL OF THE VALVES OF AN ASCO MOTOR. |
EP1137868B1 (en) | 1999-10-07 | 2004-12-22 | Heinz Leiber | Electromagnetic or electrohydraulic valve control device |
DE19948205A1 (en) * | 1999-10-07 | 2001-04-12 | Heinz Leiber | Electromagnetic facility for controlling valves includes a space closed with a cover over a cylinder head circulated with cooling intake air and fitted with actuators on carriers having electronics for inlet/outlet valves |
DE19948494A1 (en) * | 1999-10-07 | 2001-04-12 | Heinz Leiber | Electromagnetic actuator |
ITBO20000127A1 (en) * | 2000-03-09 | 2001-09-09 | Magneti Marelli Spa | ELECTROMAGNETIC ACTUATOR TO ACTIVATE THE VALVES OF A COMBUSTION ENGINE WITH RECOVERY OF MECHANICAL CLEARANCES. |
ITBO20000366A1 (en) * | 2000-06-23 | 2001-12-23 | Magneti Marelli Spa | ELECTROMAGNETIC ACTUATOR FOR THE OPERATION OF THE VALVES OF A COMBUSTION ENGINE. |
DE10035759A1 (en) * | 2000-07-22 | 2002-01-31 | Daimler Chrysler Ag | Electromagnetic poppet valve actuator for motor vehicle internal combustion engine has solenoid mounted in housing to operate on armature |
KR100401645B1 (en) * | 2001-08-21 | 2003-10-17 | 현대자동차주식회사 | Electro-mechanical balve train |
FR2834119B1 (en) * | 2001-08-30 | 2004-05-21 | Moving Magnet Tech Mmt | ELECTROMAGNETIC ACTUATOR WITH TWO STABLE LIMIT POSITIONS, IN PARTICULAR FOR CONTROLLING AIR INLET DUCT VALVES FOR INTERNAL COMBUSTION ENGINES |
US6681731B2 (en) * | 2001-12-11 | 2004-01-27 | Visteon Global Technologies, Inc. | Variable valve mechanism for an engine |
DE10226524A1 (en) * | 2002-06-14 | 2003-12-24 | Daimler Chrysler Ag | Electromagnetic actuator, e.g. for gas exchange valve in IC engine, has fixed stop pieces on abutment levers on same side as moving members fixed to pivot armature |
DE10231374A1 (en) * | 2002-07-11 | 2004-01-22 | Daimlerchrysler Ag | Electromagnetic actuator for operating a gas exchange valve in a reciprocating internal combustion engine has closing and opening magnets with a swivel armature between them to swivel on a bearing |
US7070162B2 (en) * | 2003-07-18 | 2006-07-04 | South Bend Controls, Inc. | Valve actuating apparatus |
US7255073B2 (en) * | 2003-10-14 | 2007-08-14 | Visteon Global Technologies, Inc. | Electromechanical valve actuator beginning of stroke damper |
US7152558B2 (en) * | 2003-10-14 | 2006-12-26 | Visteon Global Technologies, Inc. | Electromechanical valve actuator assembly |
US20050076866A1 (en) * | 2003-10-14 | 2005-04-14 | Hopper Mark L. | Electromechanical valve actuator |
DE102004050013B4 (en) * | 2003-10-14 | 2009-03-19 | Visteon Global Technologies Inc., Van Buren | Electromechanical valve release |
US7089894B2 (en) | 2003-10-14 | 2006-08-15 | Visteon Global Technologies, Inc. | Electromechanical valve actuator assembly |
JP2006022776A (en) * | 2004-07-09 | 2006-01-26 | Toyota Motor Corp | Solenoid-driven valve |
JP2006057521A (en) * | 2004-08-19 | 2006-03-02 | Toyota Motor Corp | Solenoid drive valve |
JP4179250B2 (en) * | 2004-09-03 | 2008-11-12 | トヨタ自動車株式会社 | Control device for electromagnetically driven valve |
US7305942B2 (en) * | 2005-02-23 | 2007-12-11 | Visteon Global Technologies, Inc. | Electromechanical valve actuator |
US7374147B2 (en) * | 2005-10-14 | 2008-05-20 | Et Us Holdings Llc | Valve assembly with overstroke device and associated method |
US20100314568A1 (en) * | 2009-06-15 | 2010-12-16 | South Bend Controls, Inc. | Solenoid coil |
US8957831B1 (en) | 2010-03-30 | 2015-02-17 | The Boeing Company | Artificial magnetic conductors |
CN110925475B (en) * | 2019-12-04 | 2021-08-17 | 济南市大秦机电设备有限公司 | Guiding electromagnetic control valve without pressure difference |
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DE2038675A1 (en) | 1970-08-04 | 1972-02-10 | Kayser Uwe Dipl Ing | Automatic valve clearance compensation through electrically heated expansion body |
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DE4430324C1 (en) | 1994-08-26 | 1996-10-10 | Vdo Schindling | Air intake pipe for automobile i.c. engine |
JP3186462B2 (en) | 1994-09-22 | 2001-07-11 | トヨタ自動車株式会社 | Electromagnetic valve drive for internal combustion engine |
ATE193589T1 (en) | 1994-11-09 | 2000-06-15 | Aura Systems Inc | ELECTROMAGNETIC STEERED VALVE WITH STEERED FITTING |
DE19506566A1 (en) | 1995-02-24 | 1996-08-29 | Bayerische Motoren Werke Ag | Electromagnetic piston valve actuation device for internal combustion engine |
DE19628860B4 (en) * | 1996-07-17 | 2008-07-31 | Bayerische Motoren Werke Aktiengesellschaft | Electromagnetic actuator for an internal combustion engine globe valve |
JP3605478B2 (en) * | 1996-08-21 | 2004-12-22 | 本田技研工業株式会社 | Valve train for internal combustion engine |
-
1998
- 1998-03-24 EP EP98917064A patent/EP0970295B1/en not_active Expired - Lifetime
- 1998-03-24 DE DE59800892T patent/DE59800892D1/en not_active Expired - Lifetime
- 1998-03-24 WO PCT/EP1998/001709 patent/WO1998042957A1/en active IP Right Grant
- 1998-03-24 US US09/381,781 patent/US6262498B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9842957A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6997433B2 (en) | 2004-01-21 | 2006-02-14 | Ford Global Technologies, Llc | Electronic valve actuator having vibration cancellation |
US7314026B2 (en) | 2004-01-21 | 2008-01-01 | Ford Global Technologies, Llc | Electronic valve actuator having hydraulic displacement amplifier |
Also Published As
Publication number | Publication date |
---|---|
DE59800892D1 (en) | 2001-07-26 |
EP0970295B1 (en) | 2001-06-20 |
WO1998042957A1 (en) | 1998-10-01 |
US6262498B1 (en) | 2001-07-17 |
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