US3882829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection control device
Assignee: Individual
•
Filing: 1972-09-13
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Granted: 1975-05-13
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Expires: 1992-09-13
Abstract
Abstract A fuel injection control device comprising pluralities of second pulse generators in addition to a first pulse generator between a pulse distributor and respective fuel injection valves. The second pulse signal is added to the first pulse signal to produce a sum signal thereof, and the pulse width of each pulse is controlled by a single pulse width control circuit common to the respective fuel injection valves, thereby to control each of the injection valves to actuate for a period of time properly determined depending upon the operational state of the engine. Each of the injection valves can operate continuously and the injection period of one fuel injection valve can overlap that of a following fuel injection valve.
Inventors
- 👤 Takeo Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02D41/36; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
273 words
A fuel injection control device for use in internal combustion engines comprising a plurality of valve means each having at least one fuel injection valve connected to an internal combustion engine, triggering pulse generator means for generating triggering pulses in response to a predetermined rotational angle of the engine, first pulse generator means for generating a train of first pulse signals wherein each said first pulse signal is produced in response to each of said triggering pulses, dividing means connected to said first pulse generator means and having a plurality of outputs for dividing pulses of said first pulse signals successively between said plurality of outputs, a plurality of second pulse generators each having an input connected to a respective one of said dividing means outputs for generating respective second pulse signals responsive to the divided train of first pulse signals, means for controlling in common the pulse widths of said second pulse signals, and a plurality of combining means each connected to a respective one of said dividing means outputs and a respective one of said second pulse generators for producing a sum signal of said first and second pulse signals, each said combining means having an output connected to a respective one of said valve means for controlling the actuating period of each of said valve means, whereby each of said valve means is capable of actuating independently of the other of said valve means, continuously for periods greater than 720* of engine rotation and the injection period of one of the valve means is capable of overlapping that of another said valve means independently of said another said valve means.
Claim 2
Dependent Claim
273 words
A fuel injection control device for use in internal combustion engines comprising a plurality of valve means each having at least one fuel injection valve connected to an internal combustion engine, triggering pulse generator means for generating triggering pulses in response to a predetermined rotational angle of the engine, first pulse generator means for generating a train of first pulse signals wherein each said first pulse signal is produced in response to each of said triggering pulses, dividing means connected to said first pulse generator means and having a plurality of outputs for dividing pulses of said first pulse signals successively between said plurality of outputs, a plurality of second pulse generators each having an input connected to a respective one of said dividing means outputs for generating respective second pulse signals responsive to the divided train of first pulse signals, means for controlling in common the pulse widths of said second pulse signals, and a plurality of combining means each connected to a respective one of said dividing means outputs and a respective one of said second pulse generators for producing a sum signal of said first and second pulse signals, each said combining means having an output connected to a respective one of said valve means for controlling the actuating period of each of said valve means, whereby each of said valve means is capable of actuating independently of the other of said valve means, continuously for periods greater than 720* of engine rotation and the injection period of one of the valve means is capable of overlapping that of another said valve means independently of said another said valve means.
Claim 3
Dependent Claim
44 words
A fuel injection control device as claimed in claim 1, wherein each of said second pulse generators includes a first semiconductor switching element having a control electrode, and an inverter connected between said control electrode and a respective one of said dividing means outputs.
Claim 4
Dependent Claim
41 words
A fuel injection control device as claimed in claim 1, wherein each of said means for controlling in common the pulse widths of said second pulse signals comprises a single constant current source connected to each of said second pulse generators.
Claim 5
Dependent Claim
89 words
A fuel injection control device as claimed in claim 1, wherein each of said second pulse generators includes a first semiconductor switching element having an output electrode, and having a control electrode coupled to a respective one of said dividing means outputs, a charging and discharging element connected to said output electrode of said first semiconductor switching element, and a second semiconductor switching element having an input electrode connected to said charging and discharging element, and having an output electrode coupled to a respective one of said combining means.
Claim 6
Dependent Claim
59 words
A fuel injection control device as claimed in claim 1, wherein each said second pulse signal generator includes means for initiating its said second pulse signal upon the termination of a respective divided first pulse signal applied thereto, and means for controlling the pulse width of its said pulse in proportion to a variable operation state of the engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |