US4033302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-stroke, multicylinder, spark ignition, fuel injection internal combustion engine
Assignee: Cracow University of Technology
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Filing: 1975-06-17
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Granted: 1977-07-05
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Expires: 1995-06-17
Abstract
Abstract A four-stroke multicylinder internal combustion engine having first and second cylinders in which combustion takes place in alternation in the cylinders at intervals of 360° of crankshaft revolution. A duct connects the working spaces of the cylinders for flow of exhaust gases between the cylinders and a fuel line is connected to the duct for supplying fuel thereto so that the fuel is transported with the flow of exhaust gases from one cylinder to the other.
Inventors
- 👤 Stanislaw Jarnuszkiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
F; F02; F02M; F02M67/00; F02M67/06; F02B; F02B13/00; F02B13/10; F02B75/00; F02B75/16; F02B75/18; F02B1/00; F02B1/02; F02B1/04; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
In a four-stroke multicylinder internal combustion engine having first and second cylinders defining working space, inlet and outlet valves in said cylinders at the upper ends thereof and respective pistons moving in unison in the cylinders and wherein combustion takes place in alternation in the cylinders at intervals of 360° of crankshaft revolution, the improvement comprising valveless duct means interconnecting the working spaces of the cylinders for flow of exhaust gases between the cylinders, and means for supplying fuel to said duct means such that the fuel is transported with the flow of exhaust gases from one cylinder to the other.
Claim 2
Dependent Claim
101 words
In a four-stroke multicylinder internal combustion engine having first and second cylinders defining working space, inlet and outlet valves in said cylinders at the upper ends thereof and respective pistons moving in unison in the cylinders and wherein combustion takes place in alternation in the cylinders at intervals of 360° of crankshaft revolution, the improvement comprising valveless duct means interconnecting the working spaces of the cylinders for flow of exhaust gases between the cylinders, and means for supplying fuel to said duct means such that the fuel is transported with the flow of exhaust gases from one cylinder to the other.
Claim 3
Dependent Claim
18 words
The improvement as claimed in claim 1 wherein said duct means includes inlet-injection ports connected to respective cylinders.
Claim 4
Dependent Claim
20 words
The improvement as claimed in claim 2 wherein said ports are located in said respective cylinders at the same level.
Claim 5
Dependent Claim
26 words
The improvement as claimed in claim 1 wherein said means for supplying fuel to said duct means comprises means for delivering fuel at a controlled rate.
Claim 6
Dependent Claim
29 words
The improvement as claimed in claim 1 wherein said means for supplying fuel to said duct means comprises a fuel pump of variable delivery drivingly coupled to the engine.
Claim 7
Dependent Claim
22 words
The improvement as claimed in claim 1 wherein said duct means has opposite ends and includes upwardly inclined branches at said ends.
Claim 8
Dependent Claim
26 words
The improvement as claimed in claim 6 wherein the duct means further includes a central horizontal portion to which said means for supplying fuel is connected.
Claim 9
Independent Claim
95 words
A method for injection of fuel into a multicylinder, four-stroke, internal combustion engine in which the working spaces of two cylinders are interconnected and respective pistons moving in unison in the cylinders and wherein combustion takes place in the cylinders in alternation at intervals of 360° and exhaust gases flow from one cylinder to the other via a valveless connecting duct, said method comprising feeding fuel to the exhaust gases in said duct flowing from one cylinder to the other for transport therewith, and injecting the fuel and exhaust gas mixture into said other cylinder.
Claim 10
Independent Claim
95 words
A method for injection of fuel into a multicylinder, four-stroke, internal combustion engine in which the working spaces of two cylinders are interconnected and respective pistons moving in unison in the cylinders and wherein combustion takes place in the cylinders in alternation at intervals of 360° and exhaust gases flow from one cylinder to the other via a valveless connecting duct, said method comprising feeding fuel to the exhaust gases in said duct flowing from one cylinder to the other for transport therewith, and injecting the fuel and exhaust gas mixture into said other cylinder.
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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |