Patent US4980793A successfully refreshed from Google Patents.
US4980793A
Expired / Lapsed
US
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Open loop control of solenoid coil driver
Assignee: Old Carco LLC
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Filing: 1990-03-07
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Granted: 1990-12-25
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Expires: 2010-03-07
Abstract
Abstract An electronic driver circuit for the open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit and where the predetermined schedules are a function of the inductance and resistance of the coil, the desired peak output voltage from the coil and the desired average holding current through the coil.
Inventors
- 👤 Thomas Glowczewski
- 👤 Keith B. Carle
- 👤 Michael R. Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:35
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0251; G; G05; G05B; G05B11/00; G05B11/01; G05B11/26; F16H2061/0255
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
An electronic driver circuit for open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit, comprising: a microcomputer unit (MCU); a memory to work with the MCU and to store predetermined schedules of solenoid coil energization "ON" time; switching means having a plurality of predetermined states to make or interrupt the current flow to the solenoid coil according to the predetermined schedules an din response to a control pulse; means providing an electrical path for circulating current in the solenoid coil to produce slow decay of the current through the solenoid coil in response to tone of said plurality of predetermined states of said switching means; and means for producing a rapid decay of current through the solenoid coil in response to another of said plurality of predetermined states of said switching means to allow the MCU to rapidly turn off the solenoid coil.
Claim 2
Dependent Claim
163 words
An electronic driver circuit for open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit, comprising: a microcomputer unit (MCU); a memory to work with the MCU and to store predetermined schedules of solenoid coil energization "ON" time; switching means having a plurality of predetermined states to make or interrupt the current flow to the solenoid coil according to the predetermined schedules an din response to a control pulse; means providing an electrical path for circulating current in the solenoid coil to produce slow decay of the current through the solenoid coil in response to tone of said plurality of predetermined states of said switching means; and means for producing a rapid decay of current through the solenoid coil in response to another of said plurality of predetermined states of said switching means to allow the MCU to rapidly turn off the solenoid coil.
Claim 3
Dependent Claim
20 words
The circuit of claim 1 where the predetermined schedules are a function of the inductance and resistance of the coil.
Claim 4
Dependent Claim
21 words
The circuit of claim 1 where the predetermined schedules are a function of a desired peak output voltage from the coil.
Claim 5
Dependent Claim
21 words
The circuit of claim 1 where the predetermined schedules are a function of a desired average holding current through the coil.
Claim 6
Dependent Claim
31 words
The circuit of claim 1 where the predetermined schedules are a function of a desired peak output voltage from the coil; and of a desired average holding current through the coil.
Claim 7
Dependent Claim
163 words
An electronic driver circuit for open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit, comprising: a microcomputer unit (MCU); a memory to work with the MCU and to store predetermined schedules of solenoid coil energization "ON" time; switching means to make or interrupt the current flow to the solenoid coil according to the predetermined schedules and in response to a control pulse; means providing an electrical path for circulating current in the solenoid coil to produce slow decay of the current through the solenoid coil in response to one of said plurality of predetermined states of said switching means; and means for producing a series of pulses having a predetermined duty cycle for causing a pulse width modulation of the current to the solenoid coil and for producing a pull-in pulse at the start of the energization "ON" time for the solenoid coil.
Claim 8
Dependent Claim
163 words
An electronic driver circuit for open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit, comprising: a microcomputer unit (MCU); a memory to work with the MCU and to store predetermined schedules of solenoid coil energization "ON" time; switching means to make or interrupt the current flow to the solenoid coil according to the predetermined schedules and in response to a control pulse; means providing an electrical path for circulating current in the solenoid coil to produce slow decay of the current through the solenoid coil in response to one of said plurality of predetermined states of said switching means; and means for producing a series of pulses having a predetermined duty cycle for causing a pulse width modulation of the current to the solenoid coil and for producing a pull-in pulse at the start of the energization "ON" time for the solenoid coil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |