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US4129040A
Expired / Lapsed
US
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Engine overspeed control system
Assignee: Individual
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Filing: 1977-09-29
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Granted: 1978-12-12
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Expires: 1997-09-29
Abstract
Abstract An overspeed control system which is electropneumatic and automatic in its operation is supplied. An engine speed sensing transducer supplies input signals to an electronic monitor which determines if an overspeed condition is about to occur and turns on a warning indicator. If further overspeed condition occurs the monitor supplies an output signal to a solenoid operated air supply control valve which vents high pressure air to a pneumatically operated valve which shuts off the engine air intake. Means are provided for testing the operation of the electronic and pneumatic components of the system independent of the operation of the engine to ensure reliability of the system.
Inventors
- 👤 Joseph C. Hayden, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
F; F02; F02D; F02D17/00; F02D17/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
158 words
A system for monitoring and controlling the speed of an internal combustion engine, comprising: means for sensing the speed of rotation of the crankshaft of an internal combustion engine and for providing an electrical signal representative thereof; pneumatically operable valve means spring biased to a normally open condition for controlling the air intake of an internal combustion engine; means for supplying air under pressure to said pneumatically operable valve means; means for comparing said representative speed of rotation signal with a predetermined engine overspeed setpoint signal and for providing an output signal only when said representative signal exceeds said predetermined signal; and means responsive to said output signal for controlling a supply of air under pressure from said means for supplying air to said pneumatically operable valve means, whereby when said output signal is present said pneumatically operable valve means is allowed to receive air under pressure thereby closing off the air intake of an internal combustion engine.
Claim 2
Independent Claim
158 words
A system for monitoring and controlling the speed of an internal combustion engine, comprising: means for sensing the speed of rotation of the crankshaft of an internal combustion engine and for providing an electrical signal representative thereof; pneumatically operable valve means spring biased to a normally open condition for controlling the air intake of an internal combustion engine; means for supplying air under pressure to said pneumatically operable valve means; means for comparing said representative speed of rotation signal with a predetermined engine overspeed setpoint signal and for providing an output signal only when said representative signal exceeds said predetermined signal; and means responsive to said output signal for controlling a supply of air under pressure from said means for supplying air to said pneumatically operable valve means, whereby when said output signal is present said pneumatically operable valve means is allowed to receive air under pressure thereby closing off the air intake of an internal combustion engine.
Claim 3
Dependent Claim
78 words
The system of claim 1 and further including: second means for comparing said representative speed of rotation signal with a second different engine initial overspeed setpoint signal and for providing a second output signal only when said representative signal exceeds said second initial overspeed setpoint signal; and alarm means, responsive to said second output signal, for providing an alarm signal to an engine operator upon the occurance of an initial engine overspeed condition in an internal combustion engine.
Claim 4
Dependent Claim
15 words
The system of claim 2 wherein said alarm means comprises an audible alarm generation means.
Claim 5
Dependent Claim
78 words
The system of claim 1 and further including: test signal generation means for generating an electrical test signal representative of said engine speed representative signal; switching means for switching the input signal to said system from said engine speed representative signal to said test signal and for switching said output signal from said means for controlling a supply of air to an output test indicator, thereby providing a testing facility for said system independent of engine running conditions.
Claim 6
Dependent Claim
51 words
The system of claim 4 and further including: manually operable switching means for directly operating said means for controlling a supply of air to said pneumatically operable valve means, thereby providing a testing mode for said pneumatically operable valve means and said controlling means which is independent of engine running conditions.
Claim 7
Dependent Claim
62 words
The system of claim 1 and further including: means for varying the frequency response of the system from a first preselected frequency response range to a second preselected frequency response range different from said first frequency response range to thereby provide an engine overspeed monitoring and controlling system for use with an external power take off system from the internal combustion engine.
Claim 8
Dependent Claim
25 words
The system of claim 6 wherein said means for varying the frequency response of said system includes switching means and AC signal frequency divider means.
Claim 9
Dependent Claim
23 words
The system of claim 1 and further including: means for manually varying said predetermined engine overspeed setpoint over a preselected range of valves.
Claim 10
Dependent Claim
56 words
The system of claim 1 wherein said comparing means comprises means for comparing a first voltage level representative of said rotation speed representative signal and a second voltage level representative of said setpoint signal as a function of the frequency of said rotation speed representative signal and including intergrator means for providing said first voltage level.
Claim 11
Dependent Claim
50 words
The system of claim 1 wherein said means for sensing the speed of rotation of the crankshaft of an internal combustion engine comprises a magnetic sensing transducer means supplying an AC output signal whose frequency is proportional to the speed of rotation of the crankshaft of an internal combustion engine.
Claim 12
Independent Claim
173 words
A system for monitoring and controlling the speed of an internal combustion engine comprising: means for sensing the speed of rotation of the crankshaft of an internal combustion engine and for providing an electrical signal representative thereof; pneumatically operable valve means spring biased to a normally open condition for controlling the air intake of an internal combustion engine; means for supplying air under pressure to said pneumatically operable valve means; means for comparing said representative speed of rotation signal with a predetermined setpoint signal indicative of an overspeed condition of a power take off system from an internal combustion engine, and for providing an output signal only when said representative signal exceeds said predetermined setpoint signal; and means responsive to said output signal for controlling a supply of air under pressure from said means for supplying air to said pneumatically operable valve means, whereby when said output signal is present said pneumatically operable valve means is allowed to receive air under pressure thereby closing off the air intake of an internal combustion engine.
Claim 13
Independent Claim
173 words
A system for monitoring and controlling the speed of an internal combustion engine comprising: means for sensing the speed of rotation of the crankshaft of an internal combustion engine and for providing an electrical signal representative thereof; pneumatically operable valve means spring biased to a normally open condition for controlling the air intake of an internal combustion engine; means for supplying air under pressure to said pneumatically operable valve means; means for comparing said representative speed of rotation signal with a predetermined setpoint signal indicative of an overspeed condition of a power take off system from an internal combustion engine, and for providing an output signal only when said representative signal exceeds said predetermined setpoint signal; and means responsive to said output signal for controlling a supply of air under pressure from said means for supplying air to said pneumatically operable valve means, whereby when said output signal is present said pneumatically operable valve means is allowed to receive air under pressure thereby closing off the air intake of an internal combustion engine.
Claim 14
Dependent Claim
79 words
The system of claim 11 and further comprising: second means for comparing said representative speed of rotation signal with a second different power take off system initial overspeed setpoint signal and for providing a second output signal only when said representative signal exceeds said second initial overspeed setpoint signal; and alarm means, responsive to said second output signal, for providing an alarm signal to an engine operator upon the occurance of an initial power take off system overspeed condition.
Claim 15
Dependent Claim
15 words
The system of claim 12 wherein said alarm means comprises an audible alarm generation means.
References Cited (Backward Citations)
US3319733A
Cited
GB1374187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |