US3690306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic control system of fuel injection device for internal combustion engines
Assignee: Denso Corp
•
Filing: 1971-03-30
•
Granted: 1972-09-12
•
Expires: 1991-03-30
Abstract
Abstract A control system for a fuel injection device of internal combustion engine, which comprises trigger pulse generator for generating a trigger pulse in synchronism with the rotation of an internal combustion engine, a variable circuit-length device by which the length of a fluid passage can be varied according to the load on the engine and a fluidic control circuit for generating a fluidic pulse of a variable width in cooperation with said variable circuit-length device, and in which the trigger pulse generated by said trigger pulse generator is applied to the fluidic control circuit and said variable circuitlength device, whereby a fluidic pulse is generated by said fluidic control circuit and the fluidic pulse thus generated is used for controlling the quantity of fuel supplied to the engine.
Inventors
- 👤 Kazuma Matsui
- 👤 Hideo Tsubouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:24
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/002; Y; Y10; Y10S; Y10S123/00; Y10S123/10; Y10S261/00; Y10S261/69
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
129 words
A control system for a fuel injection device of internal combustion engines, comprising trigger pulse generating means for generating a trigger pulse in synchronism with the rotation of an internal combustion engine, variable circuit-length means by which the length of a fluid passage can be varied according to the load on said engine and fluidic control circuit for generating a fluidic pulse of a variable width and a variable number in cooperation with said variable circuit-length means and said trigger pulse generating means, the trigger pulse generated by said trigger pulse generating means being applied to said fluidic control circuit and said variable circuit-length means, whereby a fluidic pulse is generated by said fluidic control circuit, which is used for controlling the quantity of fuel supplied to said engine.
Claim 2
Dependent Claim
129 words
A control system for a fuel injection device of internal combustion engines, comprising trigger pulse generating means for generating a trigger pulse in synchronism with the rotation of an internal combustion engine, variable circuit-length means by which the length of a fluid passage can be varied according to the load on said engine and fluidic control circuit for generating a fluidic pulse of a variable width and a variable number in cooperation with said variable circuit-length means and said trigger pulse generating means, the trigger pulse generated by said trigger pulse generating means being applied to said fluidic control circuit and said variable circuit-length means, whereby a fluidic pulse is generated by said fluidic control circuit, which is used for controlling the quantity of fuel supplied to said engine.
Claim 3
Dependent Claim
72 words
A control system for a fuel injection device of internal combustion engines, according to claim 1, wherein said fluidic control circuit includes a multivibrator element, and said variable circuit-length means is inserted in a negative feed back circuit of said element or in a circuit by which a pipe for applying the trigger pulse to a first control port of said element therethrough communicates with a second control port of said element.
Claim 4
Dependent Claim
57 words
A control system for a fuel injection device of internal combustion engines, according to claim 2, wherein said trigger pulse generating means includes a rate of rotation detecting unit adapted to generate a pulse by intermittently interrupting a fluid passage and a monostable multivibrator element for shaping the output pulse of said rate of rotation detecting unit.
Claim 5
Dependent Claim
49 words
A control system for a fuel injection device of internal combustion engines, according to claim 3, wherein said monostable multivibrator element included in the trigger pulse generating means is a one-shot monostable multivibrator element and said multivibrator element included in the fluidic control circuit is a bistable multivibrator element.
Claim 6
Dependent Claim
50 words
A control system for a fuel injection device of internal combustion engines, according to claim 3, wherein said monostable multivibrator element included in the trigger pulse generating means is a one-shot monostable multivibrator element and said multivibrator element included in the fluidic control circuit is an OR-NOR monostable multivibrator element.
Claim 7
Dependent Claim
37 words
A control system for a fuel injection device of internal combustion engines, according to claim 4, wherein said fluidic control circuit further includes a monostable multivibrator element for amplifying the output pulse of said bistable multivibrator element.
Claim 8
Dependent Claim
170 words
A control system for a fuel injection device of internal combustion engine, comprising trigger pulse generating means for generating a trigger pulse in synchronism with the rotation or an internal combustion engine, first variable circuit-length means by which the length of a fluid passage can be varied according to the load on the engine, second variable circuit-length means by which the length of a fluid passage can be varied according to the atmospheric pressure, and fluidic control circuit for generating a fluidic pulse of a variable width and a variable number in cooperation with said first and second variable circuit-length means and said trigger pulse generating means, the trigger pulses generated by said trigger pulse generating means being applied, one to said fluidic control circuit through said second variable circuit-length means and the other one to said fluidic control circuit and said first variable circuit-length means, whereby a fluidic pulse is generated by said fluidic control circuit, which is used for controlling the quantity of fuel supplied to said engine.
Claim 9
Dependent Claim
170 words
A control system for a fuel injection device of internal combustion engine, comprising trigger pulse generating means for generating a trigger pulse in synchronism with the rotation or an internal combustion engine, first variable circuit-length means by which the length of a fluid passage can be varied according to the load on the engine, second variable circuit-length means by which the length of a fluid passage can be varied according to the atmospheric pressure, and fluidic control circuit for generating a fluidic pulse of a variable width and a variable number in cooperation with said first and second variable circuit-length means and said trigger pulse generating means, the trigger pulses generated by said trigger pulse generating means being applied, one to said fluidic control circuit through said second variable circuit-length means and the other one to said fluidic control circuit and said first variable circuit-length means, whereby a fluidic pulse is generated by said fluidic control circuit, which is used for controlling the quantity of fuel supplied to said 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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |