Patent US3641986A successfully refreshed from Google Patents.
US3641986A
Expired / Lapsed
US
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Four-cycle internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1970-05-22
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Granted: 1972-02-15
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Expires: 1990-05-22
Abstract
Abstract A four-cycle internal combustion engine, particularly with externally controlled ignition, in which the piston is provided with an essentially cylindrical piston combustion space and in which a swirl of the charge present in the combustion space is produced by suitable squeeze flow channels terminating substantially tangentially in the piston combustion space within the area of the compression top dead center position of the working piston; the squeeze flow channels are formed by a suitable design of the working piston and/or of the cylinder head.
Inventors
- 👤 Ludwig Fricker
- 👤 Manfred Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:18
CPC Classifications
F; F02; F02B; F02B23/00; F02B3/00; F02B3/02; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
133 words
A four-cycle internal combustion engine comprising a working cylinder, a cylinder head, a working piston in the working cylinder, a substantially axially symmetrical piston combustion space, and swirl means for producing a swirl flow of the charge present in the combustion space, said swirl means including squeeze flow channel means terminating substantially tangentially in the combustion space within the area of the compression top dead center position of the working piston, said squeeze flow channel means being formed by a corresponding shape of at least one of the two parts consisting of the working piston and the cylinder head, characterized by an injection nozzle means arranged within the area of the channel discharge of one channel means and by a spark plug arranged in front of the channel discharge of another channel means.
Claim 2
Dependent Claim
133 words
A four-cycle internal combustion engine comprising a working cylinder, a cylinder head, a working piston in the working cylinder, a substantially axially symmetrical piston combustion space, and swirl means for producing a swirl flow of the charge present in the combustion space, said swirl means including squeeze flow channel means terminating substantially tangentially in the combustion space within the area of the compression top dead center position of the working piston, said squeeze flow channel means being formed by a corresponding shape of at least one of the two parts consisting of the working piston and the cylinder head, characterized by an injection nozzle means arranged within the area of the channel discharge of one channel means and by a spark plug arranged in front of the channel discharge of another channel means.
Claim 3
Dependent Claim
26 words
An internal combustion engine according to claim 1, characterized in that the squeeze flow channel means are constituted by a corresponding shape of the working piston.
Claim 4
Dependent Claim
26 words
An internal combustion engine according to claim 1, characterized in that said squeeze flow channel means are formed by a corresponding shape of the cylinder head.
Claim 5
Dependent Claim
28 words
An internal combustion engine according to claim 1, characterized in that said squeeze flow channel means are formed by corresponding configuration of the working piston and cylinder head.
Claim 6
Dependent Claim
21 words
An internal combustion engine according to claim 1, characterIzed in that the piston combustion space is of substantially circular cylindrical shape.
Claim 7
Dependent Claim
36 words
An internal combustion engine according to claim 5, characterized in that two channel means terminating in the same direction, substantially tangentially in the piston combustion space are arranged in the piston top of the working piston.
Claim 8
Dependent Claim
23 words
An internal combustion engine according to claim 6, characterized in that the channel means are distributed substantially uniformly about the piston combustion space.
Claim 9
Dependent Claim
57 words
An internal combustion engine according to claim 7, characterized in that the channel means start from the outer end of the piston top and have an incline increasing from a negligibly small depth at the piston top edge in the direction toward the piston combustion space up to about half the depth of the piston combustion space.
Claim 10
Dependent Claim
27 words
An internal combustion engine according to claim 8, characterized in that the width of the channel means increases in the direction toward the outer piston top edge.
Claim 11
Dependent Claim
69 words
An internal combustion engine according to claim 7, characterized in that the piston top is offset at a distance on both sides of the piston combustion space to about half the depth thereof and the cylinder head is offset in a corresponding manner into the cylinder space, and in that one channel means extends from each of the thus formed two outer squeeze spaces into the piston combustion space.
Claim 12
Dependent Claim
32 words
An internal combustion engine according to claim 1, characterized in that the spark plug is arranged upstream of the discharge aperture of the other channel means as viewed in the inflow direction.
Claim 13
Dependent Claim
47 words
An internal combustion engine according to claim 11, characterized in that the injection nozzle means is constructed as two-apertured nozzle producing an injection jet directed essentially in the swirl direction into the area of the spark plug and another injection jet directed essentially opposite the swirl direction.
Claim 14
Dependent Claim
32 words
An internal combustion engine according to claim 10, characterized in that the spark plug is arranged upstream of the discharge aperture of the other channel means as viewed in the inflow direction.
Claim 15
Dependent Claim
47 words
An internal combustion engine according to claim 13, characterized in that the injection nozzle means is constructed as two-apertured nozzle producing an injection jet directed essentially in the swirl direction into the area of the spark plug and another injection jet directed essentially opposite the swirl direction.
Claim 16
Dependent Claim
36 words
An internal combustion engine according to claim 1, characterized in that two channel means terminating in the same direction, substantially tangentially in the piston combustion space are arranged in the piston top of the working piston.
Claim 17
Dependent Claim
23 words
An internal combustion engine according to claim 1, characterized in that the channel means are distributed substantially uniformly about the piston combustion space.
Claim 18
Dependent Claim
57 words
An internal combustion engine according to claim 1, characterized in that the channel means start from the outer end of the piston top and have an incline increasing from a negligibly small depth at the piston top edge in the direction toward the piston combustion space up to about half the depth of the piston combustion space.
Claim 19
Dependent Claim
27 words
An internal combustion engine according to claim 17, characterized in that the width of the channel means increases in the direction toward the outer piston top edge.
Claim 20
Dependent Claim
69 words
An internal combustion engine according to claim 1, characterized in that the piston top is offset at a distance on both sides of the piston combustion space to about half the depth thereof and the cylinder head is offset in a corresponding manner into the cylinder space, and in that one channel means extends from each of the thus formed two outer squeeze spaces into the piston combustion space.
Claim 21
Dependent Claim
47 words
An internal combustion engine according to claim 1, characterized in that the injection nozzle means is constructed as two-apertured nozzle producing an injection jet directed essentially in the swirl directioN into the area of the spark plug and another injection jet directed essentially opposite the swirl direction.
Claim 22
Dependent Claim
32 words
An internal combustion engine according to claim 20, characterized in that the spark plug is arranged upstream of the discharge aperture of the other channel means as viewed in the inflow direction.
References Cited (Backward Citations)
US1856328A
Cited
US2125293A
Cited
US2504036A
Cited
US2766738A
Cited
US2851019A
Cited
US3304922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |