IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0344504
(2001-10-02)
|
우선권정보 |
DE-0051076 (2000-10-14) |
국제출원번호 |
PCT/EP01/11374
(2001-10-02)
|
국제공개번호 |
WO02/33228
(2002-04-25)
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발명자
/ 주소 |
- Herold, Sonja
- Stolk, Thomas
- Von Gaisberg, Alexander
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
13 |
초록
▼
An electromagnetic actuator includes two electromagnets arranged opposite one another, an armature movable back and forth between the electromagnets against the force of two mutually counteracting springs, and an adjusting device for adjusting the armature rest position. After several hours of opera
An electromagnetic actuator includes two electromagnets arranged opposite one another, an armature movable back and forth between the electromagnets against the force of two mutually counteracting springs, and an adjusting device for adjusting the armature rest position. After several hours of operation, due to settling of components, the pre-tension of the springs changes. To counteract that and achieve a durable adjustment of the pre-tension, the actuator is pre-settled before being placed in service. In this regard, the springs are compressed in repeating compression cycles so often until the energy respectively stored therein due to their compression no longer or only insignificantly differs from the energy stored in the respective spring in a preceding compression cycle, and thereafter the pre-tension of the springs is adjusted. The electromagnetic actuator is useful for controlling the gas exchange in an internal combustion engine.
대표청구항
▼
1. A method for producing an electromagnetic actuator that includes two electromagnets ( 2 , 3 ) arranged at a spacing distance relative to one another, and an armature ( 1 ) that is movable back and forth between the electromagnets ( 2 , 3 ) against the force of two oppositely acting springs ( 61 ,
1. A method for producing an electromagnetic actuator that includes two electromagnets ( 2 , 3 ) arranged at a spacing distance relative to one another, and an armature ( 1 ) that is movable back and forth between the electromagnets ( 2 , 3 ) against the force of two oppositely acting springs ( 61 , 62 ), said method comprising steps of compressing the springs ( 61 , 62 ) by a certain compression value in repeating compression cycles so often until a present cycle energy (A 1 , A 2 ) scored in each said springs ( 61 , 62 ) due to a compression in a present cycle of said compression cycles no longer or only insignificantly differs from a prior cycle energy stored in the respective said spring ( 61 , 62 ) in a prior cycle of said compression cycles, and following thereafter, adjusting a pre-tension (F 10 , F 20 ) of one of the said springs ( 61 , 62 ) or of both of said springs ( 61 , 62 ). 2. The method according to claim 1, wherein said certain compression value is selected equal to a value by which said springs ( 61 , 62 ) are compressed during a subsequent operation of the actuator. 3. The method according to claim 1, further comprising determining said present cycle energy and said prior cycle energy respectively stored in the said springs ( 61 , 62 ) by detecting a course of a spring force (F 1 , F 2 ) of said springs respectively arising through the compression of the respective one of said springs ( 61 , 62 ) and integrating said spring force over a travel displacement corresponding to the compression of the respective one of said springs. 4. The method according to claim 1, wherein said pre-tension (F 10 , F 20 ) of one or of both of said springs ( 61 , 62 ) is adjusted so that a first energy stored in a first one of said springs due to the compression thereof is equal to a second energy stored in a second one of said springs ( 61 , 62 ) due to the compression thereof when said pre-tension has been adjusted. 5. A method of preparing a newly assembled electromagnetic actuator arrangement for operation prior to being placed in service, wherein the arrangement includes an armature that is movable between two electromagnets and biased by opposed first and second springs, and wherein the method comprises the steps:a) settling said newly assembled electromagnetic actuator arrangement by cyclically compressing and decompressing said first spring in repeating first compression cycles and cyclically compressing and decompressing said second spring in repeating second compression cycles;b) determining a first spring energy stored in said first spring due to said compressing thereof in said first compression cycles, an determining a second spring energy stored in said second spring due to said compression thereof in said second compression cycles;c) continuing said steps a) and b) until said first spring energy change no more that insignificantly over successive compression cycle of said first compression cycles and said second spring energy changes no more an insignificantly over successive compressor cycle of said second compression cycles, and then discontinuing said step a);d) after said step c), adjusting at least a first pre-tension of said first spring to an operational pre-tens ion setting; ande) after said step d), placing said electromagnetic actuator arrangement into service. 6. The method according to claim 5, wherein said determining of said first spring energy comprises measuring and integrating a first spring force exerted by said first spring over a compression distance of said compression thereof in said first compression cycles, and said determining of said second spring energy comprises measuring and integrating a second spring force exerted by said second spring over a compression distance of said compression thereof in said second compression cycles. 7. The method according to claim 5, wherein said adjusting in said step d) is carried out such that said first spring energy is equal to said second spring energ y after carrying out said adjusting.
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