US3677236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-injection devices for mixture-aspiring internal-combustion engines
Assignee: Eaton Corp
•
Filing: 1970-09-08
•
Granted: 1972-07-18
•
Expires: 1990-09-08
Abstract
Abstract To control the rate of fuel injection into the induction pipe of a combustion engine, a transistor switch is arranged to vary the length of each energization of a periodically energized ultrasonic transducer which produces fuel atomization by longitudinally vibrating the open outlet end of a fuel nozzle which leads into the induction pipe and in which the fuel pressure is kept in balance with the air pressure in the induction pipe.
Inventors
- 👤 Norman Moss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:07
CPC Classifications
F; F02; F02M; F02M27/00; F02M27/08; F02D; F02D41/00; F02D41/30; F02M69/00; F02M69/04; F02M69/041; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0261; F02D2700/0266; F02D41/20; F02D41/2096; Y; Y10; Y10S; Y10S261/00; Y10S261/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A valveless device for injecting liquid fuel into an airinduction line conveying a flow of combustion air to a mixtureaspiring combustion engine, comprIsing a low-resistance injection nozzle having an open-ended outlet portion leading into the airinduction line, means for supplying liquid fuel to said nozzle and for automatically maintaining the fuel pressure in the open end of said outlet in balance with the pressure of the adjacent air, an ultrasonic transducer which when energized produces ultrasonic vibrations of the outlet portion of the nozzle in its longitudinal direction to atomize and inject fuel from said nozzle into the flow of combustion air in the air-induction line, first control means for periodically initiating energization of said transducer, further control means associated therewith, for terminating each period of such energization, and automatic means for variably controlling the length of each such period in accordance with operating data of the engine.
Claim 2
Dependent Claim
148 words
A valveless device for injecting liquid fuel into an airinduction line conveying a flow of combustion air to a mixtureaspiring combustion engine, comprIsing a low-resistance injection nozzle having an open-ended outlet portion leading into the airinduction line, means for supplying liquid fuel to said nozzle and for automatically maintaining the fuel pressure in the open end of said outlet in balance with the pressure of the adjacent air, an ultrasonic transducer which when energized produces ultrasonic vibrations of the outlet portion of the nozzle in its longitudinal direction to atomize and inject fuel from said nozzle into the flow of combustion air in the air-induction line, first control means for periodically initiating energization of said transducer, further control means associated therewith, for terminating each period of such energization, and automatic means for variably controlling the length of each such period in accordance with operating data of the engine.
Claim 3
Dependent Claim
76 words
A fuel-injection device as claimed in claim 1 for a reciprocating-piston engine, wherein said first control means are arranged to operate near the commencement of each induction stroke of each cylinder, and wherein said further control means are arranged to operate at a later point of said stroke whose cyclic spacing from said first point is arranged to vary in proportion to the product of engine speed and the amount of fuel required per induction stroke.
Claim 4
Dependent Claim
86 words
A fuel-injection device as claimed in claim 2, wherein the means for variably determining the period of energization of the transducer comprise an engine-driven distributor-switch device in which a rotary-contact wiper co-operates with a control contact whose angular setting is arranged to vary in proportion to the engine speed and to a function of induction-line pressure to determine one of the terminal points of the transducer-energization period, subsidiary means being provided which normally prevent the length of the energization period from falling below a predetermined minimum.
Claim 5
Dependent Claim
45 words
A device as claimed in claim 3, wherein an element arranged to co-operate with the wiper to determine the other of said terminal points, is adjustable from a normal position in a direction opposite to the displacement of the control element from said minimum position.
Claim 6
Dependent Claim
25 words
A device as claimed in claim 1, which includes an automatic device preventing operation of the transducer until the engine speed reaches a predetermined value.
Claim 7
Dependent Claim
35 words
A device as claimed in claim 1, which includes means operable to increase the length of each energization period of the transducer in order to facilitate the starting of the engine from a cold condition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |