US3845746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and arrangement for controlling the swirling air layers in the cylinders and combustion chambers of an air-compressing multi-cylinder reciprocable piston internal combustion engine
Assignee: Individual
•
Filing: 1971-12-09
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Granted: 1974-11-05
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Expires: 1991-12-09
Abstract
Abstract Method of and arrangement for controlling the swirling air layers in the cylinder and combustion chamber of an air compressing multi-cylinder reciprocating piston internal combustion engine, according to which an increased pressure differential is built up before the end of the suction stroke by the positive pressure produced in the induction system, and where necessary, by a suitable design of the exhaust system between the inlet and exhaust passages, the exhaust valve being opened once more during the suction stroke on this pressure differential developing to be closed only together with the inlet valve.
Inventors
- 👤 L Elsbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
F; F02; F02B; F02B3/00; F02B2720/00; F02B2720/22; F02B2720/226
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
258 words
A method for controlling the swirling air layers in the cylinder and combustion chamber of an air-compressing multicylinder reciprocating internal combustion engine having a combustion chamber in the shape of a body of revolution provided in each piston and means associated with each intake valve to induce a swirling motion of inducted air in the cylinder; said engine also having an induction system composed of connected groups of two or more individual cylinder intake pipes whose intake strokes do not overlap with the said connected groups being themselves connected to a single common intakke, the said induction system being so proportioned that the pressure prevailing at the individual intake valves is at a subatmospheric level during the first of the intake stroke but rises to a pressure above atmospheric shortly before the end of the intake stroke and thus acting as a positive pressure on the cylinder, the method of operation including the steps of (1) opening the inlet valve on the inlet stroke only after the closure of the exhaust valve and after the pressure in the associated cylinder is equal to the pressure in the associated intake pipe (2) building an increased pressure differential across the engine cylinder shortly before the end of the intake stroke by the positive pressure produced by the induction system (3) reopening the exhaust valve shortly before the end of the intake stroke upon development of said pressure differential and (4) closing the exhaust valve at the same time the intake valve is closed at the end of the intake stroke.
Claim 2
Independent Claim
258 words
A method for controlling the swirling air layers in the cylinder and combustion chamber of an air-compressing multicylinder reciprocating internal combustion engine having a combustion chamber in the shape of a body of revolution provided in each piston and means associated with each intake valve to induce a swirling motion of inducted air in the cylinder; said engine also having an induction system composed of connected groups of two or more individual cylinder intake pipes whose intake strokes do not overlap with the said connected groups being themselves connected to a single common intakke, the said induction system being so proportioned that the pressure prevailing at the individual intake valves is at a subatmospheric level during the first of the intake stroke but rises to a pressure above atmospheric shortly before the end of the intake stroke and thus acting as a positive pressure on the cylinder, the method of operation including the steps of (1) opening the inlet valve on the inlet stroke only after the closure of the exhaust valve and after the pressure in the associated cylinder is equal to the pressure in the associated intake pipe (2) building an increased pressure differential across the engine cylinder shortly before the end of the intake stroke by the positive pressure produced by the induction system (3) reopening the exhaust valve shortly before the end of the intake stroke upon development of said pressure differential and (4) closing the exhaust valve at the same time the intake valve is closed at the end of the intake stroke.
Claim 3
Dependent Claim
55 words
A method for controlling the swirling air layers in the cylinder and combustion chamber as in claim 1, characterized in that the pressure differential between the inlet and exhaust passages is enlargeable by joining together the exhaust passages of interacting cylinders in a known manner to a common exhaust pipe connected to an equalizing chamber.
Claim 4
Dependent Claim
23 words
A method according to claim 2, characterized in that interaction of cylinders is achieved by ejector action taking place in the exhaust system.
Claim 5
Dependent Claim
33 words
A method according to claim 3, characterized in that the exhaust passages of groups of three cylinders having a firing interval of 240* crank angle are joined together to a common exhsust pipe.
Claim 6
Dependent Claim
70 words
A method according to claim 4, characterized in that the common exhaust pipe for each group of three cylinders is so proportioned that, during the period within which an exhaust valve is opened together with an inlet valve belonging to the same cylinder, a negative pressure is produced in the exhaust system, and that during this period no reflections or gas pressure pulsations of another cylinder affect this negative pressure.
Claim 7
Dependent Claim
52 words
A method according to claim 1, characterized in that the length of the common intake pipe for each group of at least three cylinders is so proportioned that the total accelerated air mass changes to a positive pressure at the time the exhaust valve is reopened at all speeds including maximum speed.
Claim 8
Dependent Claim
22 words
A method according to claim 6, characterized in that the diameter-to-length ratio of the common intake pipe is between 1:8 and 1:10.
Claim 9
Dependent Claim
32 words
A method according to claim 1, characterized in that at top dead center, which is exactly scavenging dead center, of the piston both the inlet valve and the exhaust valve are closed.
Claim 10
Dependent Claim
32 words
A method according to claim 8, characterized in that the inlet and exhaust valves are not provided with any valve recesses that are liable to affect the swirling velocity of the air.
Claim 11
Dependent Claim
71 words
A method according to claim 1, chAracterized in that throttling means, which are known as shown, are provided in the induction system to be effective in the idling range of the engine to prevent a high-speed air swirl and excessive air in the cylinder and to permit swirl-free reflux of the exhaust gases into the cylinder while the inlet and exhaust valves are overlapping at the end of the suction stroke.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |