Patent US3785353A successfully refreshed from Google Patents.
US3785353A
Expired / Lapsed
US
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Fuel injection system for internal combustion engine
Assignee: Individual
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Filing: 1972-03-31
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Granted: 1974-01-15
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Expires: 1992-03-31
Abstract
Abstract The proposed system comprises electromagnetic injectors feeding the fuel cyclically into the inlet manifold of the engine. The operation of the injectors is controlled by an electronic device having at least three driven multivibrators. One multivibrator receives the signals from the engine speed transducer and from the pressure transducer responding to the air pressure in the inlet manifold of the engine and shaping pulses whose repetition frequency depends on the speed of the engine and whose duration depends on the pressure in the inlet manifold. The second multivibrator receiving the signals from the engine speed transducer shapes pedestal pulses of a specified duration in synchronism with the engine speed. The durations of the pulses of the first and second multivibrators are compared, and a signal is produced which triggers the third multivibrator when the duration of the pulse of the first multivibrator exceeds the duration of the pulse of the second multivibrator. This provides for a jumpy change in the characteristic of the pulses controlling the injectors without using electromechanical transducers operating when shifting the engine to full-power operation and when cutting off the fuel supply.
Inventors
- 👤 J Borisov
- 👤 V Koganer
- 👤 A Lisitsyn
- 👤 J Budyko
- 👤 N Dubnitsky
- 👤 J Dukhnin
- 👤 N Mozokhin
- 👤 K Masenskov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/32; F02M; F02M51/00; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
329 words
A fuel injection system for an internal combustion engine comprising in combination: a fuel tank; a fuel pump taking up the fuel from said tank through a fuel filter; electromagnetic injectors connected with said fuel pump through pipelines, said pump forcing the fuel into said pipelines; a reducing valve installed on the high-pressure side of said fuel pump, said valve maintaining a constant fuel pressure in said electromagnetic injectors which force the fuel into the inlet manifold of said engine; an electronic device sending control pulses to said electromagnetic injectors for feeding fuel into a motor or engine in accordance with its operational mode and conditions, and having at least three driven multivibrators; a power source supplying an electric current to said electronic device; an engine speed transducer sending signals to said electronic device; a pressure transducer responding to the air pressure in the inlet manifold of said engine; the first of said multivibrators receiving the signals from said transducers and producing pulses in synchronism with the engine r.p.m., the duration of these pulses being dependent on the pressure in the engine inlet manifold; the second of said multivibrators receiving the signal from said engine speed transducer and producing pulses of a fixed duration in synchronism with the engine r.p.m.; a logical unit comparing the durations of the pulses of said first and second multivibrators and sending to said electromagnetic injectors pulses whose duration equals a difference between the durations of the pulses of said first and second multivibrators in the case where the duration of the pulses of said first multivibrator exceeds that of said second multivibrator; the third of said multivibrators receiving the signals from said first and second multivibrators via said logical unit and producing pulses in the case where the duration of the pulses of said first multivibrator exceeds that of the pulses of said second multivibrator; the third of said multivibrators sending pulses to said electromagnetic injectors, which are additive to said difference pulses.
Claim 2
Dependent Claim
329 words
A fuel injection system for an internal combustion engine comprising in combination: a fuel tank; a fuel pump taking up the fuel from said tank through a fuel filter; electromagnetic injectors connected with said fuel pump through pipelines, said pump forcing the fuel into said pipelines; a reducing valve installed on the high-pressure side of said fuel pump, said valve maintaining a constant fuel pressure in said electromagnetic injectors which force the fuel into the inlet manifold of said engine; an electronic device sending control pulses to said electromagnetic injectors for feeding fuel into a motor or engine in accordance with its operational mode and conditions, and having at least three driven multivibrators; a power source supplying an electric current to said electronic device; an engine speed transducer sending signals to said electronic device; a pressure transducer responding to the air pressure in the inlet manifold of said engine; the first of said multivibrators receiving the signals from said transducers and producing pulses in synchronism with the engine r.p.m., the duration of these pulses being dependent on the pressure in the engine inlet manifold; the second of said multivibrators receiving the signal from said engine speed transducer and producing pulses of a fixed duration in synchronism with the engine r.p.m.; a logical unit comparing the durations of the pulses of said first and second multivibrators and sending to said electromagnetic injectors pulses whose duration equals a difference between the durations of the pulses of said first and second multivibrators in the case where the duration of the pulses of said first multivibrator exceeds that of said second multivibrator; the third of said multivibrators receiving the signals from said first and second multivibrators via said logical unit and producing pulses in the case where the duration of the pulses of said first multivibrator exceeds that of the pulses of said second multivibrator; the third of said multivibrators sending pulses to said electromagnetic injectors, which are additive to said difference pulses.
Claim 3
Dependent Claim
114 words
A system as claimed in claim 1, wherein, upon more than three driven multivibrators being available, at least two of said multivibrators produce pulses each of its own fixed duration, their inputs being connected to the output of said engine speed transducer, whilst each output thereof in pair with the output of said first multivibrator through said logical unit is connected to a respective additional multivibrator producing a pulse in the case where the duration of the pulses of said first multivibrator exceeds the fixed duration of the pulses of a corresponding one of said two additional multivibrators, and sending thus produced pulses to said electromagnetic injectors which are additive to said difference pulses.
Claim 4
Dependent Claim
49 words
A system as claimed in claim 2, wherein there are connected to the inputs of each of said multivibrators producing pulses of fixed duration, the outputs of the tRansducers responding to the engine operation mode and conditions and so as to accordingly correct said fixed durations of the pulses.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |