Patent USRE25870E successfully refreshed from Google Patents.
Patent US4462479A successfully refreshed from Google Patents.
US4462479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overspeed engine control
Assignee: Ogden Electronics Ltd
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Filing: 1981-03-18
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Granted: 1984-07-31
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Expires: 2001-03-18
Abstract
Abstract Apparatus for controlling the speed of an engine of a vehicle includes a processor (26) for comparing actual speed of the engine with a reference speed and for generating output signals if the actual speed is in excess of the reference speed, the output signals controlling valves (13, 14 and 15) of an air supply system (12) to a retarder of the vehicle and being arranged to operate sequentially to control progressively magnitude of power applied to the retarder if control of the vehicle is not effected to reduce speed of the engine during sequential periods of predetermined duration.
Inventors
- 👤 James Steel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:42
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/08; B60K; B60K31/00; B60K31/02; F; F02; F02B; F02B77/00; F02B77/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
199 words
Apparatus for controlling speed of an engine of a vehicle having brake retarding means, said apparatus comprising: means for generating a first signal indicative of speed of the engine, means for comparing said first signal with a signal representing a reference speed and for generating a second signal when the engine speed exceeds the reference speed, and control means responsive to said second signal to control the brake retarding means of the vehicle so that, when the engine speed exceeds the reference speed, the engine speed is retarded by the brake retarding means to a level below the reference speed, wherein said control means includes a plurality of devices successively and sequentially operable in accordance with length of a time period during which the engine speed exceeds the reference speed to control progressively the magnitude of power applied to the brake retarding means, a plurality of timing means each associated with a corresponding one of said devices and each adapted to be activated on activation of a corresponding device, and a manually operable reset switch to release the brake retarding means upon operation thereof, the said reset switch being inoperable unless the engine speed is below a predetermined value.
Claim 2
Dependent Claim
199 words
Apparatus for controlling speed of an engine of a vehicle having brake retarding means, said apparatus comprising: means for generating a first signal indicative of speed of the engine, means for comparing said first signal with a signal representing a reference speed and for generating a second signal when the engine speed exceeds the reference speed, and control means responsive to said second signal to control the brake retarding means of the vehicle so that, when the engine speed exceeds the reference speed, the engine speed is retarded by the brake retarding means to a level below the reference speed, wherein said control means includes a plurality of devices successively and sequentially operable in accordance with length of a time period during which the engine speed exceeds the reference speed to control progressively the magnitude of power applied to the brake retarding means, a plurality of timing means each associated with a corresponding one of said devices and each adapted to be activated on activation of a corresponding device, and a manually operable reset switch to release the brake retarding means upon operation thereof, the said reset switch being inoperable unless the engine speed is below a predetermined value.
Claim 3
Dependent Claim
36 words
Apparatus as claimed in claim 1 further comprising a plurality of indicating devices each associated with a corresponding one of said timing means and each adapted to be activated on activation of a corresponding timing means.
Claim 4
Dependent Claim
19 words
Apparatus as claimed in claim 2 wherein each said indicating devices comprises apparatus for providing visual and audible signals.
Claim 5
Dependent Claim
126 words
Engine overspeed control apparatus for use in controlling the speed of an engine used to drive a vehicle having a braking system, said apparatus comprising: detecting means for detecting engine speed in excess of a predetermined limit value and for producing a control signal when engine speed exceeds said limit value; first brake actuation means for automatically actuating said vehicle braking system to a predetermined initial degree in response to said control signal; timing means for measuring the elapsed time duration of said control signal and providing a further control signal if the measured time duration persists beyond a predetermined time value; and second brake actuation means for automatically further actuating said vehicle braking system to a further degree in response to said further control signal.
Claim 6
Dependent Claim
126 words
Engine overspeed control apparatus for use in controlling the speed of an engine used to drive a vehicle having a braking system, said apparatus comprising: detecting means for detecting engine speed in excess of a predetermined limit value and for producing a control signal when engine speed exceeds said limit value; first brake actuation means for automatically actuating said vehicle braking system to a predetermined initial degree in response to said control signal; timing means for measuring the elapsed time duration of said control signal and providing a further control signal if the measured time duration persists beyond a predetermined time value; and second brake actuation means for automatically further actuating said vehicle braking system to a further degree in response to said further control signal.
Claim 7
Dependent Claim
154 words
Engine overspeed control apparatus for use in controlling the speed of an engine used to drive a vehicle having a braking system, said apparatus comprising: detecting means for detecting engine speed in excess of a predetermined limit value and for producing a control signal in response to such detection; first brake actuation means for automatically actuating said vehicle braking system to a predetermined initial degree in response to said control signal; timing means for measuring the elapsed time duration of said control signal and providing a further control signal if the measured time duration persists beyond a predetermined time value; second brake actuation means for automatically further actuating said vehicle braking system to a further degree in response to said further control signal; and reset means connected to said detecting means for permitting manual deactuation of said first and second brake actuation means only after the engine speed is less than a predetermined speed.
Claim 8
Dependent Claim
154 words
Engine overspeed control apparatus for use in controlling the speed of an engine used to drive a vehicle having a braking system, said apparatus comprising: detecting means for detecting engine speed in excess of a predetermined limit value and for producing a control signal in response to such detection; first brake actuation means for automatically actuating said vehicle braking system to a predetermined initial degree in response to said control signal; timing means for measuring the elapsed time duration of said control signal and providing a further control signal if the measured time duration persists beyond a predetermined time value; second brake actuation means for automatically further actuating said vehicle braking system to a further degree in response to said further control signal; and reset means connected to said detecting means for permitting manual deactuation of said first and second brake actuation means only after the engine speed is less than a predetermined speed.
Claim 9
Dependent Claim
130 words
Apparatus for controlling speed of an engine of a vehicle having brake retarding means, said apparatus comprising: means for generating a first signal indicative of speed of the engine, means for comparing said first signal with a signal representing a reference speed and for generating a second signal when the engine speed exceeds the reference speed, and control means responsive to said second signal to control the brake retarding means of the vehicle so that, when the engine speed exceeds the reference speed, the engine speed is retarded by the brake retarding means to a level below the reference speed wherein the control means includes reset means to release the brake retarding means upon operation thereof, said reset means being inoperable unless the engine speed is below a predetermined value.
Claim 10
Dependent Claim
130 words
Apparatus for controlling speed of an engine of a vehicle having brake retarding means, said apparatus comprising: means for generating a first signal indicative of speed of the engine, means for comparing said first signal with a signal representing a reference speed and for generating a second signal when the engine speed exceeds the reference speed, and control means responsive to said second signal to control the brake retarding means of the vehicle so that, when the engine speed exceeds the reference speed, the engine speed is retarded by the brake retarding means to a level below the reference speed wherein the control means includes reset means to release the brake retarding means upon operation thereof, said reset means being inoperable unless the engine speed is below a predetermined value.
Claim 11
Dependent Claim
18 words
Apparatus as claimed in claim 6 wherein the reset means comprises a switch included in the control means.
Claim 12
Dependent Claim
15 words
Apparatus as claimed in claim 7 wherein the reset switch is operable by manual control.
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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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |