Patent US5002034A successfully refreshed from Google Patents.
US5002034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-voltage switch
Assignee: Robert Bosch GmbH
•
Filing: 1988-09-16
•
Granted: 1991-03-26
•
Expires: 2008-09-16
Abstract
Abstract A high-voltage switch is suggested which is usable particularly as an ignition voltage distributor for applying the ignition voltage to spark plugs of an internal combustion engine. The high-voltage switch comprises a cascade circuit of optoelectric semiconductor elements which are actuated or connected through by means of incident light radiation. Very high voltages can accordingly be switched in an exact manner, wherein a galvanic separation is provided between control circuit and high-voltage circuit. The control circuit can be operated with low voltage, so that use in connection with electronic ignition systems is particularly simple.
Inventors
- 👤 Werner Herden
- 👤 Walter Benedikt
- 👤 Immanuel Krauter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:26
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/10; H03K17/105; F; F02; F02P; F02P7/00; F02P7/02; F02P7/03; F02P7/035; H03K17/102; H03K17/51; H03K17/78; H03K17/795; H03K17/7955
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
High-voltage switch, particularly as ignition voltage distributor for applying the ignition voltage to spark plugs of an internal combustion engine, characterized in that a high voltage is applied to a connection terminal of a cascade circuit (1 to 4) comprising a plurality of optoelectronic semiconductor elements; in that at least one light-emitting element (6) is assigned to each cascade circuit (1 to 4); and in that the respective cascade circuit (1 to 4) connects through the high voltage at its other connection terminal when the light-sensitive regions of the semiconductor elements are irradiated with light.
Claim 2
Dependent Claim
95 words
High-voltage switch, particularly as ignition voltage distributor for applying the ignition voltage to spark plugs of an internal combustion engine, characterized in that a high voltage is applied to a connection terminal of a cascade circuit (1 to 4) comprising a plurality of optoelectronic semiconductor elements; in that at least one light-emitting element (6) is assigned to each cascade circuit (1 to 4); and in that the respective cascade circuit (1 to 4) connects through the high voltage at its other connection terminal when the light-sensitive regions of the semiconductor elements are irradiated with light.
Claim 3
Dependent Claim
21 words
High-voltage switch according to claim 1, characterized in that the semiconductor elements are constructed as high-voltage phototransistors (5) and/or photothyristors (TH).
Claim 4
Dependent Claim
24 words
High-voltage circuit according to claim 1, characterized in that the cascade circuits (1 to 4) are formed by a plurality of transistor Darlington stages.
Claim 5
Dependent Claim
31 words
High-voltage switch according to claim 1, characterized in that the light for actuating the cascade circuits (1 to 4) is guided to the light-sensitive semiconductor regions via light guide fibers (16).
Claim 6
Dependent Claim
26 words
High-voltage switch according to claim 1, characterized in that a light-emitting element (18) which can be actuated with low voltage is assigned to eery semiconductor element.
Claim 7
Dependent Claim
50 words
High-voltage switch according to claim 5, characterized in that the cascade circuits of the optoelectric semiconductor elements (17) and the assigned light-emitting elements (18) are constructed as a hybrid circuit in which a light-permeable insulator (19) is arranged between the optoelectric semiconductor elements (17) and the adjacent light-emitting elements (18).
Claim 8
Dependent Claim
18 words
High-voltage switch according to claim 1, characterized in that the light-emitting elements (6, 18) work with low voltage.
Claim 9
Dependent Claim
35 words
High-voltage switch according to claim 1, characterized in that a cascade circuit (1 to 4) with respective light-emitting elements (6, 18) is assigned to every spark plug (ZK1 to ZK4) of an internal combustion engine.
References Cited (Backward Citations)
DE2249838A1
Cited
US3880132A
Cited
US4122814A
Cited
US4201173A
Cited
US4194480A
Cited
US4223656A
Cited
US4274135A
Cited
US4403593A
Cited
JPS59108873A
Cited
GB2136238A
Cited
DE3343853A1
Cited
WO1988003608A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |