IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0618722
(1984-06-08)
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발명자
/ 주소 |
- Slavin, Michael
- Martus, Charles R.
- Miller, Ellsworth S.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
8 인용 특허 :
2 |
초록
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A computer controlled turbo boost valve for internal combustion engines of the type having a turbo charger and a turbo charger feedback line, the valve having a valve element actuated by an internally mounted solenoid which is adapted to be connected to the computer, the valve having a valve element
A computer controlled turbo boost valve for internal combustion engines of the type having a turbo charger and a turbo charger feedback line, the valve having a valve element actuated by an internally mounted solenoid which is adapted to be connected to the computer, the valve having a valve element that is operable to regulate bypass flow of exhaust gases from the feedback line and that is mounted so as to be rapidly responsive to energization and deenergization of the solenoid and to be minimally affected by flow of exhaust gases into and through the valve, the components of the valve being uniquely combined and correlated, and the actuator for the valve element in particular being uniquely formed to provide for a high degree of quality control under mass production conditions of manufacture.
대표청구항
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1. A solenoid valve having a casing formed in at least two parts one of which has a fluid passage including an inlet and an outlet one of which is formed at the inner end thereof with a valve seat; a solenoid in said casing including a bobbin fixedly connected at one end to the part of said casi
1. A solenoid valve having a casing formed in at least two parts one of which has a fluid passage including an inlet and an outlet one of which is formed at the inner end thereof with a valve seat; a solenoid in said casing including a bobbin fixedly connected at one end to the part of said casing having said fluid passage, an energizable activating coil on said bobbin, a pole piece in said bobbin, and an armature at one end of said coil and said pole piece; means providing a continuous flux flow path for electromagnetic current generated by said coil when energized including a stationary support connected to said pole piece and having a part thereof disposed a substantial distance laterally of said fluid passage, said pole piece being disposed intermediate of and spaced substantial distances laterally of both said valve seat and said support, and said armature being supported by pivot means on the mentioned part of said support and extending laterally therefrom between and transversely of said pole piece and said valve seat; a valve element interposed between said valve seat and said armature actuable by the latter from and to said valve seat between closed and open positions to control flow of fluid through said passage; spring means coactive with said armature urging the latter away from said pole piece and normally holding said valve element on said valve seat; and adjustment means for establishing at assembly of the solenoid valve, simultaneously by a single forming operation, a predetermined spacing between said armature and said pole piece and a predetermined minimum spacing between the valve element and said valve seat when said valve element is in the fully open position, said adjustment means including a line of localized weakness in said armature intermediate said valve seat and said pole piece and laterally away from and out of said continuous flux flow path, whereby said forming operation can be performed by exerting deforming pressure against said armature opposite said valve seat using a tool of precisely predetermined length inserted into said fluid passage through said valve seat while holding said armature firmly against said support at said pivot means. 2. A solenoid valve as defined by claim 1 wherein said one part of the casing has an end wall, at least part of said fluid passage is in said end wall, and said pole piece is disposed substantially centrally of said casing with one end thereof facing and spaced from said end wall. 3. A solenoid valve as defined by claim 2 wherein the pivot connection between said armature and the mentioned part of said support comprises a lay-on seat on said support facing said end wall, and interfitting means of said support and said armature permitting latter to be readily placed on or lifted from said seat for easy assembly of said solenoid valve. 4. A solenoid valve as defined by claim 3 wherein said armature is adapted to be held firmly on and against the lay-out seat portion of said support during said forming operation. 5. A solenoid valve as defined by claim 3 wherein said spring means is coactive with said armature outboard of the point of engagement thereof with said valve element and is operative in use to hold the latter normally in engagement with said lay-on valve seat and simultaneously to rock said armature on said valve element to hold the pivoted end of said armature normally on said seat. 6. A solenoid valve as defined by claim 1 including spring retainer means detachably associated with said spring means for holding the latter in engagement with said armature. 7. A solenoid valve as defined by claim 6 wherein said spring means is in the form of a helical compression spring and said spring retainer means comprises a post mounted on and carried by a second part of said support, said post extending into and loosely fitting said spring means. 8. A solenoid valve as defined by claim 1 wherein said support comprises an L-shaped bracket one arm of which is fixed to said pole piece at the end thereof remote from said armature and the other arm of which extends alongside and is spaced laterally from said coil and forms not only a part of said flux flow but also at least part of the pivot means interconnecting said support and said armature. 9. A solenoid valve as defined by claim 1 wherein said line of localized weakness comprises a slot in and extending transversely of said armature intermediate said valve seat and said pole piece. 10. A solenoid valve as defined by claim 9 wherein said slot is of curved configuration and said line of localized weakness includes notches in the edges of said armature opposite the ends of said slot. 11. A solenoid valve as defined by claim 1 wherein said valve element is in the form of a ball valve, and including an annular deflector interposed between and spaced from said valve seat and said armature, said deflector surrounding and being spaced radially from said ball valve and the latter being free-floating in said deflector, said deflector having an annular deflecting surface facing said inlet and tapering radially outwardly and axially away therefrom, whereby said deflector serves the dual function in use of guiding said valve element in its opening and closing movements and of deflected incoming fluid from said inlet radially outwardly from said ball valve to prevent build-up of pressure behind said valve. 12. A computer controlled turbo boost valve for an internal combustion engine having a turbo charger and a turbo charger feed-back line, said valve being of the type having a casing formed in at least two parts and wherein one of said parts has an inlet and an outlet therein, said inlet adapted to be connected to said feed-back line and provided at the inner end thereof with a valve seat, a solenoid in said casing having a terminal externally of said casing adapted to be electrically connected to said computer and to be energized thereby, said solenoid including a bobbin attached to and fixedly spaced from said one part of said casing, a pole piece in said bobbin, an armature interposed between, extending transversely of, and spaced from said pole piece and said valve seat, and mounting means of magnetic material fixedly connected to said pole piece at one end of the latter, said mounting means having a pivot connection with said armature permitting swinging movement of the latter to and from said pole piece and said valve seat defining a solid seat for the armature at the pole piece side thereof, a valve element adapted to be interposed between said armature and said valve seat, said valve element being engageable by said armature and engageable with said valve seat to control flow of fluid into said casing through said inlet, the improvement comprising means integral with said armature defining a line of localized weakness extending transversely of said armature intermediate said pole piece and the point of engagement of said valve element by said armature, said means permitting both the spacing between said valve seat and said valve element in the open position of the latter and the spacing between said armature and said pole piece to be precisely established during manufacture of said valve by permanently deforming the armature along said line of weakness by exerting deforming pressure against said armature at a point opposite said valve seat using a tool of precisely predetermined length inserted through said inlet while holding said armature firmly against solid seat at said pivot connection; and an air deflector disposed adjacent to said valve element and in the path of the engine exhaust entering said casing through said inlet for preventing excessive back pressure behind said valve element, said valve element being in the form of a ball, and said air deflector being annular in form and disposed in surrounding relation to and spaced radially outwardly from said ball valve element, said inlet and said outlet being in one end of said casing, said bobbin having an end flange fixed to said casing and spaced from said one end and from said inlet and said outlet, said annular air deflector being mounted on and supported by said end flange and in coaxial relation with respect to said inlet, and said annular air deflector being disposed between said end flange and an adjacent end of said casing and axially with respect to said inlet, said air deflector being provided with an annular deflecting surface facing in the direction of said inlet and tapering radially outwardly and axially away from said inlet. 13. A turbo boost valve as defined by claim 12, wherein the internal diameter of said air deflector is larger than the diameter of said ball valve, whereby said air deflector serves the dual function of guiding said valve element in its opening and closing movements and of deflecting incoming air from said inlet radially outwardly from said valve element, whereby to prevent build-up of pressure behind said valve element sufficient to interfere significantly with full opening movement of said valve element in use. 14. In a computer controlled turbo boost valve for an internal combustion engine having a turbo charger and a turbo charger feed-back line, a casing having a fluid passage provided with an inlet and an outlet, said inlet adapted to be connected to said feed-back line and being formed at the inner end thereof with a valve seat, the improvement wherein said casing is formed in at least two parts one of which contains said inlet, and including a solenoid in said casing having a terminal externally of the casing adapted to be electrically connected to said computer and be energized thereby, said solenoid including a bobbin fixedly connected at one end to the part of said casing having said inlet, an energizable activating coil on said bobbin, a pole piece in said bobbin, and an armature at one end of said coil and said pole piece; means providing a continuous flux flow path for electromagnetic current generated by said coil when energized including a stationary support connected to said pole piece and having a part thereof disposed a substantial distance laterally of said inlet, said pole piece being disposed intermediate of and spaced substantial distances laterally of both said inlet and said support, and said armature being supported by pivot means on the mentioned part of said support and extending laterally therefrom between and transversely of said pole piece and said valve seat; a valve element interposed between said valve seat and said armature actuable by the latter from and to said valve seat between closed and open positions to control flow of fluid through said passage; spring means coactive with said armature urging the latter away from said pole piece and normally holding said valve element on said valve seat; and adjustment means for establishing at assembly of the solenoid valve, simultaneously by a single forming operation, a predetermined spacing between said armature and said pole piece and a predetermined minimum spacing between the valve element and said valve seat when said valve element is in the fully open position, said adjustment means including a line of localized weakness in said armature intermediate said valve seat and said pole piece and laterally away from and out of said continuous flux flow path, whereby said forming operation can be performed by exerting deforming pressure against said armature opposite said valve seat using a tool of precisely predetermined length inserted through said inlet while holding said armature firmly against said support at said pivot means.
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