Patent US3601110A successfully refreshed from Google Patents.
US3601110A
Expired / Lapsed
US
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Fuel injection system
Assignee: Denso Corp
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Filing: 1970-01-12
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Granted: 1971-08-24
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Expires: 1990-01-12
Abstract
Abstract A fuel injection system for an internal combustion engine provided with solenoid injection valves wherein in order to ensure a positive starting of the engine in cold weather, high frequency heating means are provided for heating the injection valves such that when the engine is at a low temperature, a high frequency generator for said heating means automatically operates to heat the injection valves.
Inventors
- 👤 Isezi Kamazuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:50
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/064; F02M; F02M53/00; F02M53/04; F02M53/06; F02M2700/00; F02M2700/07; F02M2700/077
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
In a fuel injection system wherein an electrical pulse is produced in accordance with the valve-open timing of the air inlet valves for an internal combustion engine and the pulse is then converted into a fuel injection pulse whose pulse width corresponds to the engine suction and the like thereby energizing fuel injection solenoid valves by means of the fuel injection pulse to inject the fuel into the engine cylinders, the combination characterized by comprising a temperature detector to produce an electrical signal proportional to the engine temperature, a high-frequency generator to produce a highfrequency output depending on the output from said temperature detector, and heating means provided for each of said solenoid valves, said heating means being adapted to be actuateD by the output from said high-frequency generator to heat said solenoid valves.
Claim 2
Dependent Claim
134 words
In a fuel injection system wherein an electrical pulse is produced in accordance with the valve-open timing of the air inlet valves for an internal combustion engine and the pulse is then converted into a fuel injection pulse whose pulse width corresponds to the engine suction and the like thereby energizing fuel injection solenoid valves by means of the fuel injection pulse to inject the fuel into the engine cylinders, the combination characterized by comprising a temperature detector to produce an electrical signal proportional to the engine temperature, a high-frequency generator to produce a highfrequency output depending on the output from said temperature detector, and heating means provided for each of said solenoid valves, said heating means being adapted to be actuateD by the output from said high-frequency generator to heat said solenoid valves.
Claim 3
Dependent Claim
42 words
A fuel injection system according to claim 1 wherein said high-frequency generator is so constructed that said generator produces a high-frequency output only when the output from said temperature detector is at a value corresponding to the temperature below a predetermined level.
Claim 4
Dependent Claim
37 words
A fuel injection system according to claim 1 wherein said high-frequency generator is so constructed that said generator produces a high-frequency output substantially inversely proportioned to the engine temperature represented by the output of said temperature detector.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |