US3819949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electric installations
Assignee: Mitsubishi Electric Corp
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Filing: 1973-01-02
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Granted: 1974-06-25
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Expires: 1993-01-02
Abstract
Abstract A control system for electric installations is disclosed. In response to one rotation signal for each revolution of an engine, control intelligences in the form of a time-divided multiplexed pulse train is transmitted through a single transmission line to a plurality of detector units, the pulse train having an index pulse resulting from the rotation signal. In each detector unit the counting of the trains''s pulses is initiated by the index pulse to determine that pulse assigned to an electric installation connected to the detector unit. At that time, the corresponding control intelligence pulse is restored from the pulse train to control the electric installation. A fixed frequency oscillator provides the rotation signal at rotational speeds of the engine which are less than a predetermined speed.
Inventors
- 👤 A Ueda
- 👤 M Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06; G08C15/12; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
237 words
A control system for controlling electrical installations on a motor vehicle which may be isolated from noise created by the motor vehicle ignition system, comprising: a plurality of control operating means each having an output, the number of said control operating means being equal to the number of electrical installations provided on the motor vehicle with each of said plurality of control operating means generating an output information signal at the output thereof; transmission means coupled to the outputs of each of said control operating means for transmitting said respective output information signals in the form of a time divided multiplexed signal to said electrical installations; a plurality of signal detecting means, each of said signal detecting means connected to said transmission means and a different one of said electrical installations for detecting information from said time divided multiplexed signal relating to the electrical installation and operating said electrical installations, said information being determined by said control operating means; and sensing means including a rotation sensor having an input and an output, said input operatively coupled to the motor on said motor vehicle for sensing the rate of rotation of the motor of said motor vehicle and for providing an output signal indicative of the rate of rotation at the output thereof, said output being operatively coupled to said signal detecting means whereby said output signal is used as an indexing signal for said time multiplexed signals.
Claim 2
Dependent Claim
237 words
A control system for controlling electrical installations on a motor vehicle which may be isolated from noise created by the motor vehicle ignition system, comprising: a plurality of control operating means each having an output, the number of said control operating means being equal to the number of electrical installations provided on the motor vehicle with each of said plurality of control operating means generating an output information signal at the output thereof; transmission means coupled to the outputs of each of said control operating means for transmitting said respective output information signals in the form of a time divided multiplexed signal to said electrical installations; a plurality of signal detecting means, each of said signal detecting means connected to said transmission means and a different one of said electrical installations for detecting information from said time divided multiplexed signal relating to the electrical installation and operating said electrical installations, said information being determined by said control operating means; and sensing means including a rotation sensor having an input and an output, said input operatively coupled to the motor on said motor vehicle for sensing the rate of rotation of the motor of said motor vehicle and for providing an output signal indicative of the rate of rotation at the output thereof, said output being operatively coupled to said signal detecting means whereby said output signal is used as an indexing signal for said time multiplexed signals.
Claim 3
Dependent Claim
127 words
The device of claim 1, wherein said sensing means further comprises: a fixed frequency oscillator generating a fixed frequency output signal; detecting means having inputs receiving said fixed frequency output signal and said output signal indicative of the rate of rotation for determining whether or not said rate of rotation is above a predetermined value, and producing an output signal having a frequency euqal to said rate of rotation signal when the sensed rate of rotation is above said predetermined value and having the frequency of said oscillator fixed frequency output signal when said rate of rotation is equal to or less than said predetermined value, and the output of said detecting means being connected to said transmission means for inclusion in said time divided multiplexed signal.
Claim 4
Dependent Claim
136 words
The device of claim 2, wherein said plurality of signal detecting means are in parallel relationship and said transmission means comprises a single transmission line and a control signal generator means coupled to said plurality of parallel signal detecting means, and wherein each of said control operating means is comprised of a plurality of time delay means and a plurality of intelligence pulse generator means each having an output, interspaced in a series arrangement with each of said intelligence pulse generator means producing an output pulse at a different time due to said interspaced time delay means, a plurality of signal sources, one signal source coupled to each of said intelligence pulse generating means, and said control signal generator means coupled to each of said outputs of said intelligence pulse generating means and said detecting means.
Claim 5
Dependent Claim
76 words
The device of claim 3, wherein each of said signal detecting means is respectively comprised of isolation means coupled to the transmission means for isolating an output information pulse from the time divided multiplexed signal and discriminator means coupled to said isolation means for receiving said output information pulse and restoring said signal to the original intelligence provided by said respective control operating means, each of the restored signals being applied To the respective electrical installation.
Claim 6
Dependent Claim
200 words
The device of claim 4, wherein said isolation means comprises an index separation means coupled to the transmission means to separate index pulses from the time divided multiplexed signals and for producing an output signal upon detection of the separated index pulses, a counter means, a decoder means and an intelligence separation means, said counter means coupled to the transmission means for counting the information signals present in the time divided multiplexed signals, said counter means having a reset means coupled to said index separation means whereby said counter means is reset when an output signal is produced by said index separation means, said counter means producing an output when the number of pulses counted by said counter means is equal to a preset number indicative of the relative position of a specific information pulse in said time divided multiplexed signal, said decoder means having an input connected to the output of said counter means and an output, said intelligence separation means coupled to the output of said decoder means and said transmission means for isolating the specific intelligence signal from said multiplexed signal, the occurrance of which pertinent intelligence signal is indicated by the output of said decoder means.
Claim 7
Dependent Claim
45 words
The device of claim 5, wherein said discriminator means is coupled to said intelligence separation means and further including a driving circuit means coupled to said discriminator means for developing an output signal capable of causing the associated electrical installation to be driven into operation.
Claim 8
Dependent Claim
131 words
The device of claim 1, wherein said sensing means further comprises: a clock means operatively coupled to each of said signal detecting means and to said transmission means; a fixed frequency oscillator generating a fixed frequency output signal; detecting means having inputs receiving said fixed freqeuncy output signal and said output signal indicative of the rate of rotation, for determining whether or not said rate of rotation is above a predetermined value and producing an output signal having a frequency equal to said rotation sensor output signal when said rate of rotation is above said predetermined value and otherwise having the frequency of said fixed frequency oscillator, said detecting means output signal being used as an index signal for said time divided multiplexed signal being applied to said signal detecting means.
Claim 9
Dependent Claim
133 words
The device of claim 7, wherein said signal detecting means each comprise a time delay means each having a time delay for producing a delayed output signal coupled to said clock means and to said detecting means, each said time delay chosen according to the position of a desired information pulse in the time divided multiplexed signal, an intelligence separation means coupled to said transmission means and said time delay means for isolating the intelligence relating to the corresponding electrical installation from said time divided multiplexed signal, and a discriminator means coupled to said intelligence separation means for restoring the information signal isolated by said intelligence separation means to the original intelligence provided by said respective control operating means and producing an output signal adapted to drive said associated electrical installation into operation.
Claim 10
Dependent Claim
44 words
The device of claim 8, wherein said signal detecting means each respectively comprise a driving circuit means coupled to said discriminator means for developing a drive signal from said discriminator means output signal to cause the associated electrical installation to be driven into operation.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |