Patent US3730159A successfully refreshed from Google Patents.
US3730159A
Expired / Lapsed
US
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Fuel injection device for internal combustion engines
Assignee: Societe des Procedes Modernes dInjection SOPROMI
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Filing: 1971-12-17
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Granted: 1973-05-01
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Expires: 1991-12-17
Abstract
Abstract An improved device for controlling, either directly or indirectly, the injection of pressurized fuel into an internal combustion engine. The device comprises a body having a fuel inlet, a fuel outlet and a fuel return, as well as a valve mounted therein. The valve is actuated by an electromagnet and is adapted to establish communication between the fuel inlet and the fuel outlet when the valve is actuated. The device has a fuel accumulator comprising an opening in one side of the body and a diaphragm mounted across the opening to form an enclosed volume within the body. The enclosed volume communicates with the fuel input so that the diaphragm deflects outwardly with respect to the interior of the body in response to increases in the pressure of the pressurized fuel provided to the fuel input. The improvement comprises a pressure regulator having a regulatory valve disposed within the body and actuated by the diaphragm. The regulatory valve has an input in communication with the enclosed volume and an output in communication with the fuel return. The regulatory valve is adapted to establish communication between the enclosed volume and the fuel return when the pressure of the pressurized fuel in the enclosed volume reaches a predetermined value.
Inventors
- 👤 G Sallot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:26
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/14; F02M69/145; F02M51/00; F02M51/02; F02B; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
258 words
An improved device for controlling the injection of pressurized fuel from a source of fuel on an internal combustion engine, the device having a body having a fuel input adapted to receive the pressurized fuel, a fuel output adapted to provide fuel to injectors, and a fuel return adapted to return fuel to the fuel source, a valve mounted within the body, the valve having a first path therein communicatively connected to the fuel input, a second path therein connected to the fuel output and a third path therein connected to the fuel return, an electromagnet mounted within the body for actuating the valve, the valve being adapted to place the fuel input into communication with the fuel output when it is actuated, the body having an opening in one surface thereof, a diaphragm mounted across the opening in the body to form an enclosed volume within the body, the enclosed volume being communicatively connected to the fuel input, the diaphragm being adapted to deflect outwardly away from the enclosed volume in response to increases in the pressure of the fuel to be provided to the fuel input, the improvement comprising a pressure regulator disposed within the body and having a regulatory valve, the regulatory valve having an input in communication with the enclosed volume and an output in communication with the fuel return, the reGulatory valve being adapted to establish communication between the enclosed volume and the fuel return when the pressure of the pressurized fuel to be provided to the fuel input reaches a predetermined value.
Claim 2
Dependent Claim
258 words
An improved device for controlling the injection of pressurized fuel from a source of fuel on an internal combustion engine, the device having a body having a fuel input adapted to receive the pressurized fuel, a fuel output adapted to provide fuel to injectors, and a fuel return adapted to return fuel to the fuel source, a valve mounted within the body, the valve having a first path therein communicatively connected to the fuel input, a second path therein connected to the fuel output and a third path therein connected to the fuel return, an electromagnet mounted within the body for actuating the valve, the valve being adapted to place the fuel input into communication with the fuel output when it is actuated, the body having an opening in one surface thereof, a diaphragm mounted across the opening in the body to form an enclosed volume within the body, the enclosed volume being communicatively connected to the fuel input, the diaphragm being adapted to deflect outwardly away from the enclosed volume in response to increases in the pressure of the fuel to be provided to the fuel input, the improvement comprising a pressure regulator disposed within the body and having a regulatory valve, the regulatory valve having an input in communication with the enclosed volume and an output in communication with the fuel return, the reGulatory valve being adapted to establish communication between the enclosed volume and the fuel return when the pressure of the pressurized fuel to be provided to the fuel input reaches a predetermined value.
Claim 3
Dependent Claim
57 words
A device in accordance with claim 1 and further defined wherein the regulatory valve of the pressure regulator is adapted to establish the communication between the enclosed volume and the fuel return in response to a predetermined deflection of the diaphragm caused by a predetermined pressure of the pressurized fuel to be provided to the fuel input.
Claim 4
Dependent Claim
198 words
A device in accordance with claim 2 and further defined wherein the regulatory valve of the pressure regulator comprises a bore in the body of the device and a piston mounted in the bore for movement in a first and a second direction, the piston having a hollow interior and having transverse ports disposed at a predetermined distance from one end of the piston, the transverse ports extending from the exterior of the piston to the hollow interior thereof, the hollow interior of the piston being in communication with the bore adjacent the other end of the piston, the bore being in communication with the fuel return, the piston being adapted for movement in the first direction in response to an outward deflection of the diaphragm and for movement in the second direction in response to an inward deflection of the diaphragm, the piston and the bore being adapted to place the enclosed volume, and thus the fuel input, in communication with the fuel return through the transverse ports and the hollow interior of the piston when the piston moves at least a predetermined distance in the first direction in response to a predetermined deflection of the diaphragm.
Claim 5
Dependent Claim
25 words
A device in accordance with claim 3 and further defined wherein the one end of the piston is coupled to the diaphragm for movement therewith.
Claim 6
Dependent Claim
104 words
A device in accordance with claim 2 and further defined wherein the diaphragm deflects outwardly in two stages, the first stage of outward deflections encompasses from zero deflection to the predetermined deflection and the second stage of deflections encompasses further outward deflections of the diaphragm, during the first stage of deflections the enclosed volume being adapted to function as an accumulator for the pressurized fuel to be provided, further outward deflection of the diaphragm causing the regulatory valve of the pressure regulator to open whereby the pressurized fuel to be provided to the fuel input passes from the enclosed volume to the fuel return.
Claim 7
Dependent Claim
78 words
A device in accordance with claim 2 and further defined wherein a passage is formed in the body of the device adjacent to and about the valve, the passage being in communication with the fuel return, the second path of the valve and the output of the regulatory valve, whereby pressurized fuel passing from the enclosed volume through the regulatory valve to the fuel return in response to the opening of the regulator valve circulates about the valve.
Claim 8
Dependent Claim
65 words
A device in accordance with claim 2 and further comprising a valve in the fuel return of the body of the device, the valve being adapted to remain closed until the hydraulic pressure of the pressurized fuel to be provided in the interior of the body reaches a predetermined pressure upstream of the valve, thus establishing a predetermined counter-pressure for the fuel within the device.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |