US3672339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection apparatus
Assignee: Honeywell Inc
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Filing: 1970-02-24
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Granted: 1972-06-27
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Expires: 1990-02-24
Abstract
Abstract A fluidically controlled fuel injection system wherein fuel is delivered to the engine in pulses, the repetition rate of the pulses corresponding to engine speed, and the duration of the pulses being determined primarily by engine manifold vacuum. Pneumatic means may be provided to compensate the fuel injection system for variations in air temperature, engine temperature, and atmospheric pressure.
Inventors
- 👤 Jeffrey M Lazar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:20
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; F02; F02M; F02M7/00; F02M7/10; F02M7/106; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
167 words
A fuel system for an internal combustion engine having an air intake passage, comprising: pulse generating means for generating a train of fluid pulses whose frequency is indicative of engine speed; conduit means in communication with said air intake passage; fluid resistance means connected between said conduit means and said air intake passage; variable impedance means connected to said conduit means, said variable impedance means operable to admit a quantity of air into said conduit means according to parameters associated with the operation of the engine; pulse modifying means in communication with said pulse generating means and said conduit means, said pulse modifying means for varying the duration of said fluid pulses according to pressure in said conduit means; fuel valve means connected to said pulse modifying means for energization upon occurrence of a fluid pulse for the duration thereof; and injector means operatively connected to said fuel valve means, said injector means adapted for supplying fuel to the engine upon energization of said fuel valve means.
Claim 2
Dependent Claim
167 words
A fuel system for an internal combustion engine having an air intake passage, comprising: pulse generating means for generating a train of fluid pulses whose frequency is indicative of engine speed; conduit means in communication with said air intake passage; fluid resistance means connected between said conduit means and said air intake passage; variable impedance means connected to said conduit means, said variable impedance means operable to admit a quantity of air into said conduit means according to parameters associated with the operation of the engine; pulse modifying means in communication with said pulse generating means and said conduit means, said pulse modifying means for varying the duration of said fluid pulses according to pressure in said conduit means; fuel valve means connected to said pulse modifying means for energization upon occurrence of a fluid pulse for the duration thereof; and injector means operatively connected to said fuel valve means, said injector means adapted for supplying fuel to the engine upon energization of said fuel valve means.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 wherein said variable impedance means comprises means responsive to engine temperature.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 1 wherein said variable impedance means comprises means responsive to atmospheric pressure.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1 wherein said variable impedance means comprises means responsive to air temperature.
Claim 6
Dependent Claim
92 words
The apparatus of claim 1 further including fuel cutoff means connected to said pulse generating means and said air intake passage for producing fuel cutoff signals whenever a low pressure condition exists in said air intake passage and the frequency of said train of fluid pulses exceeds a predetermined value, said fuel cutoff means further connected to said pulse modifying means for supplying said fuel cutoff signals thereto, and wherein said pulse modifying means is adapted to prevent the flow of fuel to the engine when said fuel cutoff signals are received.
Claim 7
Dependent Claim
14 words
Apparatus according to claim 5 wherein said fuel cutoff means includes fluid amplifier means.
Claim 8
Dependent Claim
95 words
The apparatus of claim 1 wherein said internal combustion engine includes throttle means, and further including fuel cutoff means connected to said pulse generating means and said throttle means for producing fuel cutoff signals whenever said throttle means is closed and the frequency of said train of fluid pulses exceeds a predetermined value, said fuel cutoff means further connected to said pulse modifying means for supplying said fuel cutoff signals thereto, and wherein said pulse modifying means is adapted to prevent the flow of fuel to the engine when said fuel cutoff signals are received.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |